KR20240152767A - Back-up Power System for Traffic Signal Controller Using Ripple-Free ESS Charging - Google Patents

Abstract

The present invention is a backup power system technology of a traffic signal control system that supplies high-quality direct current through low power and reverse ripple function in a charging device that charges an ESS using alternating current. The present invention eliminates the surge pulse factor generated from PWM when an ESS (energy storage device) is fully charged, thereby enhancing the safety of the ESS, and thereby expanding the charging capacity of the ESS.
The present invention, for the above purpose,
A main power supply that rectifies and outputs a sine wave voltage;
A charging system that receives charging power from the main power supply and an ESS unit that stores charging energy;
A supplementary power supply unit that generates voltage and is connected in series to the main power supply unit;
A ripple detection unit that detects ripple when the output voltage of the above main power unit is a ripple voltage including ripple;
A configuration including a reverse ripple function generating unit that generates a reverse ripple opposite to the ripple detected from the above ripple detecting unit;
The above-mentioned supplementary power supply is interlocked with the main power supply so that the voltage output from the main power supply is maintained at a set load voltage, and when a ripple is detected from the ripple detection unit, the supplementary power supply generates a pulse output by a reverse ripple function from the reverse ripple function generation unit, so that a DC voltage with the ripple canceled out is generated at the output terminal of the main power supply, while limiting or suppressing a surge pulse, thereby disclosing a non-ripple backup power supply charging device.
According to the present invention, there is an effect of enhancing battery safety from surge pulses and expanding battery charging capacity while minimizing loss consumed in power control.

Description

{Back-up Power System for Traffic Signal Controller Using Ripple-Free ESS Charging}

The present invention is a technology for charging with high-quality direct current through reverse ripple function control in a charging device that charges an ESS using alternating current. The present invention enhances ESS safety by eliminating the surge pulse factor when the ESS (energy storage device) is fully charged, and maintains high-quality direct current power characteristics even during charging. The present invention can be applied to mobile charging such as backup power systems for important equipment, electric vehicles, electric ships, and electric bicycles.

ESS is an energy storage device that is useful for factories or households in areas or countries where power conditions are not smooth. It mainly stores energy during times when power is supplied or during late-night hours when electricity rates are low, and discharges the power for use during times when electricity rates are high or during power outages.

Once the high-quality charging function is secured, it can be usefully utilized in a backup DC power system for traffic signal control that operates momentary power outages or charging and discharging simultaneously.

Since ESS is also installed in mobile devices that use electricity as a power source, the high quality and safety of its charging are directly related to fire prevention in underground parking lots, etc.

Figure 1 is a block diagram illustrating a typical charging control system. The main power obtained from the AC rectifier (1) is supplied to the battery (ESS, 2) by changing the setting to the voltage required for each charging stage through the charger (charge controller; 3). The load stage (4) is directly connected in parallel with the ESS or connected through the load stage terminal of the charger.

Figure 1 depicts the input terminal voltage supplied to the charger (3) as VP2 and the charger output terminal voltage as VP1. Figure 1 includes an AC power source (1-3) in the form of a general sine wave (1000-1), a rectifier (1-1) output waveform (1000-2) when the AC power source is full-wave rectified, and a pulse waveform (1000-3) when the AC power source is filtered into a DC current by a smoothing capacitor (1-2) and then supplied to an appropriate load.

In Fig. 1, the charge controller (3) receives the output of the main power supply (1) in the form of a pulse (1000-3) and outputs a stable DC voltage (1000-4). At this time, in order to obtain a high-quality DC voltage, the voltage set as the lower limit (1000-4) in (C) of Fig. 1 must not be exceeded. If this level is exceeded, a ripple (1000-3), which is an AC component of the pulse voltage, is supplied to the ESS, and this ripple may cause a surge pulse problem. In addition, this ripple causes a noise problem in the power supply of a communication power supply or an audio device.

In Fig. 1, (1-3) is a power transformer, (1-2) is a semiconductor type rectifier element such as a diode or FET, and 1-1 is a filtering capacitor that compensates for the inflection point in (B) with a charging time constant.

In Fig. 1, the charge controller can be configured as an analog regulator or a digital charge controller using PWM control. In the case of an analog regulator, the voltage difference between (VP2 - VP1) causes heat generation as it acts as an input/output stage loss, so the analog method is not preferred for large-capacity charging other than for communication or audio devices that require precision.

In comparison, the PWM control method has relatively small loss between input and output, but due to its unique characteristic of interrupting power at short time intervals when charging is complete (not shown), pulse-shaped PWM noise is generated, and especially in the full charge region indicated by (Rn) in Fig. 2, it causes a problem of adversely affecting the surge pulse. Even though the voltage supplied to the ESS is constant, as it approaches full charge and the charging current gradually decreases, the input voltage (VP2) is controlled with a pulse width of a narrow duty ratio so that it does not flow to the load end (VP1), which eventually creates a vicious cycle in which a larger surge voltage is generated by the narrowed pulse.

As ESS fires occur frequently, relevant authorities have limited ESS charging to 80% of the maximum capacity, which proves that PWM noise increases when it reaches 80%. If PWM noise can be fundamentally eliminated, ESS charging can be expected to be expanded to a high level of 80% or more, preferably up to 95%.

The reason why PWM noise causes problems or heat generation becomes a problem in analog chargers is because PWM control or regulation is performed on the entire input voltage (VP2).

The present invention fundamentally resolves the problem of heat generation by suggesting an alternative thereto, and further discloses a technology for expanding the safety and performance of ESS by controlling offset and blocking surge pulses for the ripple portion when ripple occurs.

With these safety and performance expansion technologies, the present invention can be utilized in mobile charging technologies including backup DC power systems for traffic signals requiring high quality, electric vehicles requiring high safety, and electric ships. The present invention can be applied to any analog regulator and/or digital charging controller, and can particularly prevent fires in ESS.

(1) KR 1020200089557 (2020.07.20.) (2) KR 1020190019077 (2019.02.19.) (3) KR 1020190094849 (2019.08.05.) (4) KR 1020200039764 (2020.04.01.) (5) KR 1020190094844 (2019.08.05.) (6) KR 1020150008277 (2015.01.16.) (7) KR 1020180001666 (2018.01.05.) (8) KR 1020170153635 (2017.11.17.) (9) KR 1020180154303 (2018.12.04.) (10) KR 1020190170458 (2019.12.19. (11) KR 1020200038300 (2020.03.30.) (12) KR 1020210003544 (2021.01.11.) (13) KR 10-2021-0172644(2021.12.06.) (14) KR 10-2021-0176358(2021.12.10.) (15) KR 10-2022-0013866(2022.02.02.) (16) KR 10-2022-0017217(2022.02.09.) (17) KR 10-2022-0041425(2022.04.03.)

The first purpose of the present invention is to disclose a technology for minimizing the operating loss of a charging controller by minimizing the difference between the voltage input to the charging controller and the voltage output from the charging controller.

The second object of the present invention is to disclose a technology for smoothing ripples output from a main power supply to obtain a perfect DC output, while minimizing the power control range, i.e., loss factors, even in the smoothing configuration.

The third purpose of the present invention is to disclose a technical configuration that immediately responds to a pulse voltage occurring in an ESS charging system and prevents an ESS explosion, thereby enabling it to be utilized as a backup power system for important facilities or for mobile safety charging.

The present invention, for the above purpose,

A main power supply that outputs a voltage lower than that required by the charging control system;

A charging system connected to receive charging power from the main power supply and an ESS unit storing charging energy;

A supplementary power supply unit that regulates the low voltage of the main power supply unit to the voltage required for the charging system;

A ripple detection unit that detects ripple when the output voltage of the above main power unit is a ripple voltage including ripple;

A configuration including a reverse ripple function generating unit that generates a reverse ripple opposite to the ripple detected from the above ripple detecting unit;

The present invention discloses an ESS charging device characterized in that the supplementary power supply is interlocked with the main power supply so that the voltage output from the main power supply is maintained at a set load voltage, and when a ripple is detected from the ripple detection unit, the supplementary power supply generates a pulse output by a reverse ripple function from the reverse ripple function generation unit, and a DC voltage with the ripple canceled out is generated at the positive electrode of the main power supply.

Here, the supplementary power supply unit may further include a linked configuration of a pulse detection control unit that controls the boost supply to be limited when a surge pulse voltage is detected in the charging system (charge control unit and EES unit).

In addition, the supplementary power supply may include a maximum power tracking configuration that tracks the maximum value of the effective current supplied to the load with the remainder consumed in the operation of the supplementary power supply by procuring the power from an external power source other than the main power supply and linking an effective current detection unit to the procurement path, or a maximum power tracking configuration that feeds back some of the power of the main power supply to supplement the voltage of the main power supply and links an effective current detection unit to the feedback path to track the maximum value of the effective current supplied to the load with the remainder consumed in the operation of the supplementary power supply.

The present invention discloses a technical configuration that allows a supplementary power supply to optimally match the main power supply and the load section, and further maintain operation at a power point of maximum efficiency, which is near the resonance point of a power transformer, etc. The supplementary power supply of the present invention includes a technology for tracking the maximum power point at ultra-high speed through a current runaway control function.

According to the present invention, the main power supply unit, which shares most of the load power, supplies the rectified power as it is to the load unit, and the supplementary power supply unit is responsible for voltage regulation and ripple cancellation over a small range, so that loss due to control is minimized.

According to the present invention, the difference between the input voltage and the output voltage of the charging controller is eliminated to a negligible level by the reverse ripple function control that cancels out the ripple, and further, a high-quality pure DC component can be obtained through such technology.

According to the present invention, an ultra-high-speed maximum power point tracking technology can be obtained, and furthermore, by blocking the cause of pulse voltage generation occurring when ESS charging is completed, safety from ESS explosion can be strengthened while significantly expanding the charging capacity.

According to the present invention, it is possible to secure high-quality power for communication or audio devices through power control in a small control range. Furthermore, through this high-performance quality, it can be utilized as a backup power system for traffic signals where safety is important, and can be utilized for mobile charging in places such as parking lots where fire safety is important.

Figure 1 is a block diagram illustrating a conventional ESS charging system.
Figure 2 is a graph showing the battery current flow diagram showing how the charging current flow of the ESS changes step by step and in which cases a surge pulse occurs during the process.
Figure 3 is a block diagram schematically representing the positions of each waveform in a conventional charging system. It shows that a surge pulse is generated when ripple and PWM control are mixed.
Figure 4 is a block diagram of an embodiment of the present invention. It shows the principle and circuit of obtaining a pure DC component by synthesizing a ripple voltage including ripple from a main power supply and a ripple voltage including reverse ripple from a supplementary power supply.
Fig. 5 is a block diagram showing, as an example, how the concept of Fig. 4 is achieved by combining specific components. Fig. 5 shows, as an example, that the supplementary power supply in Fig. 4 operates by receiving a portion of the output power of the main power supply as feedback.
FIG. 6 is a block diagram illustrating an exemplary embodiment of the maximum power tracking function of the present invention.
Figure 7 is a graph explaining the maximum power tracking function of the supplementary power supply unit, which is an example of Figure 6, using the duty ratio control principle.
Figure 8 is a flowchart explaining the principle of controlling the maximum power tracking of the supplementary power supply unit, which is an example of Figure 6, by current surge using an algorithm.
FIGS. 9 and 10 are block diagrams and algorithm flowcharts illustrating an example of a charging system that maintains a set output voltage while suppressing the output voltage when a surge pulse is detected in the supplementary power supply of the present invention.
Figure 11 is a voltage-current-power curve diagram illustrating the resonance point of a power supply source for explaining the maximum power tracking action of the present invention.

The present invention may have various embodiments in addition to those described below, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that the configuration disclosed below includes all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention. Although similar reference numerals are used for similar components in describing each drawing, for example, terms such as first, second, first, second, etc. are used only for the purpose of distinguishing one component from another component, and these components should not be understood as being limited by terms such as first, second, first, second, etc. The above terms may be referred to as the second component, and the second component may also be referred to as the first component by the same principle, without departing from the scope of the present invention. The same applies to the first and second, and the terms ‘first’ and ‘next’ also apply.

Under these principles, embodiments according to the present invention will be described in detail below with reference to the attached drawings. The purpose and features of the present invention will become more apparent through the following detailed description.

Figure 3 is a block diagram schematically illustrating a conventional charging controller (3) and its peripheral configuration.

Referring to Fig. 3, it can be understood that the (A) waveform is output from the secondary coil output of the power source (1-3), the (B) waveform, for example, which is full-wave rectified, is output from the rectifier (1-1), and when power is supplied to the load from the smoother unit (1-2), a ripple-shaped waveform (1000-3; C) in which the voltage decreases over time from the maximum voltage is output.

Here, (1000-4) is a DC voltage level reference that limits the ripple (1000-3) from being supplied to the output. As a result, a voltage difference of, for example, 1.414 times occurs from the level (1000-4) to the peak value of (1000-3), and this 0.4 times difference becomes a target of heat generation when regulated in the charge controller. (0.414 times is an example of the difference between the P-P voltage and the rms voltage. Fig. 3 illustrates a reciprocating transformer as an example, but a single-turn transformer may be applied if insulation is not important.))

Figures 3 (D) and (E) illustrate examples of waveforms that appear when the charge controller is operated mainly by PWM control. In Figures 3 (D) and (E), (1000-5) represents a surge pulse waveform by PWM that appears when battery charging is complete.

If the smoothing circuit capacitor (1-2) cannot sufficiently handle the load current, the fluctuation size of the ripple voltage (△r) in (D) of Fig. 3 increases, and if the capacity of the power coil (1-3) or the capacity of the diode (1-1) of the rectifier is insufficient, the fluctuation range of △V increases further as seen in (E) of Fig. 3. In any case, ripple acts on the load, and in order not to flow this ripple to the load end, the regulator (3) must cut off ripples of a level greater than (1000-4) as a standard.

Surge pulse is a pulse noise that is particularly problematic when the current supplied to the battery is time-interrupted and limited by PWM in the (Rn) section of Fig. 2, i.e. in a fully charged state of the battery. Since such surge pulse can cause fire or explosion, especially in the case of lithium-ion batteries, it is usually recommended to charge the ESS at a charge rate of about 80%, which is a level at which such pulses do not occur.

Figure 4 is a block diagram conceptually explaining the principle of the present invention, and Figure 5 is a block diagram illustrating one example of various configurations in which the present invention can be implemented. The main configurations are:

A main power supply unit (1) that outputs a voltage lower than the voltage required by the charging control system;

A charging system connected to receive charging power from the main power supply and an ESS unit (2) that stores charging energy;

A supplementary power supply unit (30) that regulates the low voltage of the main power supply unit to the voltage required for the charging system;

A ripple detection unit (31) that detects ripple when the output voltage of the above main power unit is a ripple voltage including ripple;

A configuration including a reverse ripple function generating unit (32) that generates a reverse ripple opposite to the ripple detected from the above ripple detecting unit;

The above-described supplementary power supply is interlocked with the main power supply so that the voltage output from the main power supply is maintained at a set load voltage, and when a ripple is detected from the ripple detection unit, the supplementary power supply generates a pulsating voltage output by a reverse ripple function from the reverse ripple function generation unit, so that a DC voltage with the ripple canceled out is generated at an output terminal where the outputs of the main power supply and the supplementary power supply are combined.

The above supplementary power supply unit (30) may further include a linked configuration of a pulse detection control unit (60 in FIG. 9) that controls the boost supply to be limited when a surge pulse voltage is detected in the charging system (charge control unit and EES unit).

The supplementary power supply (30) of Fig. 4 can be supplied from an external power supply (Buck (+)in) not shown in the diagram in addition to the main power supply (1).

Referring to Fig. 5, the supplementary power supply unit (30) can be controlled by feedback to feed back a portion of the power of the main power supply unit (1) to supplement the voltage of the main power supply unit. The feedback path may further include a connection configuration of a maximum power tracking unit (40) linked to an effective current detection unit (IP3). The maximum power tracking unit (40) performs a function of tracking the effective current (IP3) supplied to the load as the remainder consumed in the operation of the supplementary power supply unit (30) to become the maximum value.

By the same principle, the supplementary power supply unit may be supplied from an external power source other than the main power supply unit, and an effective current detection unit (IP3) may be linked to the supply path to further include a configuration that tracks the maximum value of the effective current (IP3) supplied to the load after the remainder consumed in the operation of the supplementary power supply unit.

First, the function of Fig. 4 is explained.

When a sine wave (1000-1) commercial power source is rectified, a ripple (△r) corresponding to the difference between the maximum value (p-p; 1000-3) and the root mean square value (rms; 1000-4) may occur. This ripple disappears when the load current is 0, and the output voltage becomes equal to the maximum voltage of the sine wave. However, when the consumption of the current flowing to the load terminal or the time constant of the smoothing circuit including the smoothing capacitor (1-1) changes, a ripple occurs in a periodic or irregular form. The ripple shape at this time is (G).

If a ripple is generated in a function opposite to this ripple in the supplementary power supply (30) connected in series with the main power supply (1) (this is defined as an inverse ripple function) and connected to the main power supply so that the ripples cancel each other out (see (H) of Fig. 4), then at the output terminal (VP1) where the main power supply (1) and the supplementary power supply (30) are combined, the original ripple (E-2) and the corresponding inverse ripple (E-1) of the opposite phase are combined to cancel each other out, thereby outputting a voltage of a pure DC component such as (E-3) (1000-4).

That is, for example, in a configuration where the main power supply accounts for 80% of the total power output and the supplementary power supply accounts for 20%, if a pure DC component is obtained by the reverse ripple function output action of the supplementary power supply in a series-connected configuration, the loss required for conversion (control) is reduced to 20/100. FIG. 5 of the present invention is an embodiment that specifically realizes this.

Each component and its interconnection operation are explained with reference to Figure 5.

The main power supply (1) basically outputs a voltage lower than the voltage required by the charging control system. The reason for setting the voltage to a low level is that when the supplementary power supply intervenes to boost the voltage, a voltage drop is established that can supply power to the charging system, but when a surge pulse or overcharge is detected and the current or power flowing to the charging system is to be cut off, the output of the supplementary power supply is stopped so that the voltage drop is not established. However, since the voltage does not necessarily have to be low to operate, it is not necessarily limited to a low voltage. For example, a configuration that clamps the ripple (cuts off the excess portion when the voltage exceeds the set standard due to the ripple) can also be considered.

The ESS unit (2) includes a charging system connected to receive charging power from the main power unit and a battery that stores charging energy. In the case of a lithium-ion series battery, it is preferable that the charging system includes a battery management system (BMS). This BMS may include a configuration that balances the voltages of each battery terminal when multiple batteries are connected in series or in parallel, and further monitors them remotely.

The supplementary power supply unit (30) is a component that regulates the voltage by increasing the low voltage to the voltage required for the charging system when the main power supply unit (1) is designed with a low voltage.

The supplementary power supply unit can be powered by the feedback power from the main power supply unit or by the power supplied from a separate independent auxiliary power supply. Here, the independent auxiliary power supply means that a separate power supply is provided in the form of a return winding in the main power supply path, and the power supply can be, for example, a DC power supply rectified from a separate coil winding or transformer. In addition, there can be various methods for the independent auxiliary power supply, such as a battery or a renewable energy power supply.

The ripple detection unit (31) detects when a ripple voltage occurs in the charging system. In simple terms, it includes a configuration that detects and extracts only the AC component from the pulsating voltage that includes the AC component in the DC component. For example, it may be a configuration that extracts and detects the signal of the AC component by connecting capacitors in series.

The reverse ripple function generating unit (32) uses the AC signal extracted from the ripple detection unit (31) to generate a ripple signal of an inverse function corresponding to the AC signal. The inverse ripple function includes a configuration that detects the temporal change and height of the AC component included in the pulse as a function and generates a signal of an inverse phase.

As an example, by using the inverting (-) input of the operational amplifier, the ripple signal can be interpreted inversely and an inverse ripple function can be easily created. In addition, the sampling function of the microcomputer can be used by encoding it as an inverse ripple function. The ripple pattern that appears in the periodic characteristics of 60Hz commercial power can be modeled and used. The pattern modeling at this time can be a leading or lagging control that matches the phase of the ripple signal that comes in the next cycle.

The set voltage detection unit (33) is a component that sets the required voltage of the load end. For example, if the ESS is a 24V lithium-ion series, it is set to 29.2V. This setting may include a configuration that is automatically set while detecting the battery voltage and type by a microcomputer.

The supplementary power supply unit (30) may be implemented as a buck converter in one embodiment of the present invention (in addition, various converter series such as buck-boost, boost, septic, zeta, and flyback may be applied) that receives some of the current from the main power supply unit and feeds it back to the main power supply unit at a lower voltage.

At this time, since the control by the reverse ripple function generator (32) and the set voltage detection unit (33) is applied to the feedback voltage output, the supplementary power supply unit generates the output voltage (VP3) controlled by the control signal (△-V) generated by the reverse ripple function generator (32) within the range where the total output voltage (VP1) is maintained as the required voltage of the load. Accordingly, even if the ripple (△V) is included in (VP2), a pure DC component with the ripple offset by the control signal (△-V) can be obtained in (VP1).

By this principle, (VP1) can obtain a voltage of pure DC component of optimum potential which is neither higher nor lower than the voltage required by the load side. This high performance enables it to be applied to backup power systems for communication, sound, and traffic signal control.

Going back to Figure 4, let's organize it conceptually.

In VP2 of Fig. 4, there is a pulsating component △V, and its height can be up to 1.4 times (the difference between the maximum value of the sine wave and the root mean square (rms) value) depending on the consumption of the load power. In the present invention, this is referred to as △V, and the inverse ripple function corresponding to the reverse direction is defined as △-V. In Fig. 4, △V is (G), and △-V by the inverse function is (F). Since they are opposite phase signals, if (F) and (G) are serially canceled on the same time axis, the ripple generated in the main power supply is canceled by the inverse ripple function of the supplementary power supply, so that the power supplied to the battery becomes pure direct current (E-3). This principle is depicted in an overlapping graph as (H) of Fig. 4.

In Fig. 4, (H) illustrates the appearance of the inverted ripple signal (E-1) generated in the inverse ripple function generator corresponding to (E-2), (E-2), where the height of the ripple changes depending on the current consumption of the load, and the pure DC voltage (E-3) that is canceled out when they are combined.

In short, even without the conventional charging controller (3), only the voltage required for the load section (2, 4) can be adjusted and sent through the control of the supplementary power supply unit (30), and accordingly, △V, which originally acted as a loss in the charging controller (3), is eliminated.

However, even in the case of the present invention, there will be a conversion loss in which the supplementary power supply (30) handles the output, but since the supplementary power supply has a significantly lower share of the role of offsetting the ripple, for example, at a share of 20/100 compared to the load power, the conversion loss is reduced by that ratio.

The present invention supplies the output voltage of the main power supply to the load section up to its peak voltage, so that power efficiency can be greatly increased. Accordingly, according to the present invention, the difference between the peak power and the real power is eliminated, and accordingly, the PWM-controlled surge pulse generated due to the peak voltage is eliminated, which is a significant effect. According to the present invention, even if the charging capacity is increased to 100%, there is no factor for the surge pulse to occur.

In addition, the present invention can further be connected to a pulse detection control unit (60) that controls the boost supply to be limited when a surge pulse is detected in the charging control unit and EES unit, which are charging systems. At this time, the pulse detection control unit is for PWM noise that may occur when charging is completed even in the above-mentioned safety-ensuring situation. This will be described later in FIG. 9.

Furthermore, by adding the function of a maximum power tracking unit that acts as a current surge control to the reverse ripple function generating unit of the present invention, it becomes possible to operate by automatically tracking the maximum power point without damaging the resonance point of the power source. This exhibits a unique function of eliminating ripple while operating the power source at maximum efficiency in a configuration that uses a commercial power source.

The maximum power tracking unit of the present invention that achieves this will be described in detail with reference to FIGS. 5 and 6 below.

The supplementary power supply unit (30) of Fig. 5, which is an example, is configured to receive operating power feedback from the main power supply.

A main power supply unit (1) supplied with power by a power generating station;

Battery or/and load (2, 4);

A supplementary power supply unit (30) connected between the main power supply and the load unit to control the output voltage;

An active current detection unit (IP3) that detects the active current supplied to the above battery system or the active current supplied to a load connected to the above battery system;

Including a configuration that links a current overload control unit (40) that overloads the current of the main power supply unit in a range in which the effective current detected from the above-mentioned effective current detection unit increases;

The above supplementary power supply unit (30) is configured to link a first input terminal (X), a second input/output terminal (Y), and a third output terminal (Z) between the main power supply unit (1) and the load unit (4), and includes a configuration in which the output voltage (VP3) of the supplementary power supply unit is regulated within the range of maintaining the maximum power (Vmp) of the main power supply unit (1) by feeding back the output voltage to one electrode (-) of the main power supply unit (-).

The above current surge control unit (40) performs the function of a maximum power tracking unit that controls the current of the main power unit to surge so that the effective current (IP3) maintains an effective current value corresponding to the maximum power even when the load (4) voltage becomes higher than the maximum power voltage (Vmp) and maintains the main power unit within the maximum power range.

In the configuration of Fig. 5,

The main power supply (1) supplies operating power from the power supply (1-3). Since the power supply can obtain maximum efficiency when it supplies power in accordance with the resonance characteristics, the present invention includes a maximum power tracking configuration that operates at a resonance point where the current flowing to the load end is maximum within a certain range of load end voltage. However, the overall configuration of the present invention is not necessarily limited to including such a configuration.

The supplementary power supply unit (30) feeds back the output voltage (VP3) to one electrode of the main power supply unit (1) to generate a voltage (VP1) output that is the sum of the output voltages of the main power supply unit and the supplementary power supply unit. As an example of the circuit configuration, the supplementary power supply unit illustrated in FIG. 5 may be implemented by connecting the first input terminal (X) and the second input/output terminal (Y) to a power supply path that receives power from the main power supply unit, and feeding back the output of the supplementary power supply to one electrode of the main power supply unit through the second input/output terminal (Y), while outputting a voltage that is the sum of the outputs of the main power supply unit and the supplementary power supply unit to the load terminal, which is the connection point of the third output terminal (Z). This configuration corresponds to a configuration in which the supplementary power supply unit is connected between the cathode of the main power supply unit and the cathode of the load terminal, but is not limited thereto. For example, the supplementary power supply unit (30) may be connected to the positive electrode of the main power supply unit (1) by changing the polarity.

In the path flowing to the third output terminal (Z) terminal of each input and output terminal configuration of the supplementary power supply unit (30), only the effective current (IP3) supplied to the load terminal flows, which is the remainder after deducting the idling current (IP1) supplied to the first input terminal (X) of the supplementary power supply unit from the total current (IP2) produced by the main power supply unit (1). The effective current detection unit (IP3) of the present invention detects this current and, by interlocking with the current runaway control unit (40) described below, maintains the power supply in a resonant state while maintaining a balance to supply appropriate power to the load terminal.

Here, the power supply achieves maximum efficiency when the impedance is matched in a resonant state, and also, if the load voltage is constant, the effective current value is also maximum when the supplementary power supply operates in a state of maximum power output. Therefore, maximum power tracking can be performed, for example, by configuring the tracking of the maximum detection value of the effective current detection unit (IP3).

The active current detection unit (IP3) can be linked to detect the current flowing through the resistor using the voltage drop method, amplify it with an operational amplifier, and supply it as an active current control signal to the current runaway control unit. Here, the voltage detection method by the resistor can be replaced with the magnetic induction method using a Hall sensor. The magnetic induction method has the advantage of being able to be insulated. Of course, in the case of voltage detection, if a photocoupler, etc. is used, it is possible to detect the voltage or current that changes in the insulated state.

In Fig. 5, the unexplained symbol 30-6 is a switch that operates and stops the supplementary power supply as needed.

The current surge control unit (40) controls the supplementary power supply unit (30) to rapidly increase or decrease exponentially when generating output.

Here, runaway control means that the supplementary power supply unit squeezes the voltage (VP2) of the main power supply unit (1) connected between the load end (4) and both ends of the supplementary power supply unit (30) so that the maximum current flows from the power supply (1-3), but increases the output of the supplementary power supply unit at an exponential rate until the desired current value is reached.

By this current runaway control, as soon as the control signal from the reverse ripple function generating unit is supplied, the supplementary power supply unit can generate the output voltage as the control signal by the reverse ripple function, and furthermore, it can detect the decrease in the effective current at the maximum power point where the resonance point of the power supply is not disturbed and maintain the output voltage at that point. Therefore, the current runaway control unit of the present invention can also perform the maximum power tracking function.

Figure 6 is a block diagram illustrating an example of a current surge control unit (40).

Referring to Fig. 6, the first input terminal (a) of the current surge control unit is connected to detect a voltage change value, and the second input terminal (b) is connected to detect an effective current change value (IP3). The voltage change value means that the supplementary power supply output voltage (VP3), the main power supply voltage (VP2), or the sum voltage (VP1) is detected as a relative change value.

These first input terminals (a) and second input terminals (b) are supplied to the rising current runaway command unit (40-3) and the falling current runaway command unit (40-4) via the instantaneous edge detection unit (40-1 and 40-2). The edge detection result determines whether to command rising or falling in the logic circuit of the logic, and the command proceeds as a command signal in the form of a linear increase or decrease until the desired result is reached in the form of a current runaway. Here, the logic circuit may be a programmed gate combination configuration using a combination of gates or an FPGA. It may also be a program using a microcomputer.

The command signal can be output as a pulse or an encoded signal through a mixing circuit (40-7).

The command signal passing through the mixing circuit (40-7) and the waveform shaping circuit (40-8) is supplied as a control signal to the supplementary power supply unit (30), so that the maximum power point is tracked as a balance corresponding to the point where the rising current runaway command unit (40-3) and the falling current runaway command unit (40-4) are balanced.

Here, the instantaneous edge detection unit (40-1, 402) is a component that determines the immediately preceding and immediately succeeding values as relative values. This instantaneous edge detection enables the generation of an inverse ripple function that immediately reacts to the ripple waveform in the present invention.

The rising current runaway command unit (40-3) detects the presence or absence of ripple voltage through the first input terminal (a), and if the ripple voltage is detected, the supplementary power unit (30) is immediately moved in the opposite direction to offset the ripple voltage in the sum voltage (VP1). The falling current runaway command unit (40-4) is configured to lower the output of the supplementary power unit (30) so that the rising current runaway command unit (40-3) does not excessively increase, and in particular, it is a component that operates immediately when the effective maximum current detected by the effective current detection unit (IP3) decreases to cause a counteraction that stops or offsets the action of the rising current runaway command unit (40-3). Here, if the rising surge is excessive, it will over-compress the main power supply (1), overloading the power supply, which will destroy the resonance point in the impedance matching with the power supply, and eventually reduce the effective current (IP3). However, the falling surge command section will stay at the neutral point and work in the opposite direction to the rising current surge command section to maintain a balance in which the sum voltage (VP1) is within an appropriate range and the resonance point is maintained.

Figure 7 is a graph showing the signal characteristics of the rising current runaway command unit (40-3) and the falling current runaway command unit (40-4) using the duty ratio control concept.

Referring to (A) and (B) of FIG. 7, the output of the rising current rampage command unit (40-3) and the output of the falling current rampage command unit (40-4) are a rising duty ratio signal (40-5) and a falling duty ratio signal (40-6), respectively. The rising is a command to increase voltage and outputs a wide duty ratio (40a) signal, and the falling is a command to decrease voltage and outputs a narrow duty ratio (40c) signal. The average value (40b) is supplied as a control signal input of the supplementary power supply unit to suppress or relieve the voltage of the main power supply unit.

When the voltage of the main power supply is compressed, the load on the main power supply becomes heavier, so the voltage decreases while the current increases. On the contrary, when it is relaxed, the voltage increases while the current decreases. This action causes a decrease in the effective current centered on the resonance point, so the supplementary power supply controls the current surge moment by moment by utilizing this.

The duty ratio signal of Fig. 7 can be maintained in the on state until the maximum power point current is reached in the case of a rising current runaway command, and conversely, can be maintained in the off state until the maximum power point current is restored in the case of a falling current runaway command. Therefore, it is not necessarily configured as a repetitive duty ratio as in Fig. 7, and can be configured as an asynchronous duty ratio control signal that is generated depending on the case or freely determines the duty ratio width. Since this duty ratio is ultimately supplied as a control signal that operates the supplementary power supply unit (30), it is possible to infer whether the current runaway control unit is operating by observing that the neutral point average signal of the rising or falling current runaway signal is supplied to the input of the supplementary power supply unit (30).

In short, according to the present invention, by making the duty ratio width of 40a in Fig. 7 very large or repeatedly generating a relatively wide duty ratio, this can be made into a rising current surge, and by continuing or repeating a narrow duty ratio, such as the duty ratio of 40c, this can be made into a falling current surge or rising current surge stop command.

Fig. 7 (B) illustrates a case where the duty ratio is controlled by synchronizing with the same phase time. The operating principle is the same as (A).

The current surge control unit (40) practically integrates and performs the functions of the maximum power tracking unit. In particular, this function may include a fine adjustment role for comparing and offsetting errors that occur in the combination of the ripple (△V) and reverse ripple (△-V) described above.

The attached photos in Fig. 7 show current runaway command signals observed with an oscilloscope. The uppermost trace waveform in Photo 1 is the duty ratio of the rising current runaway command, and the middle trace waveform shows the duty ratio signal of the falling current runaway command. The pulsating waveform of the lowest trace shows the control signal supplied to the supplementary power supply (30). Photo 1 was taken when the control signal was balanced while repeating the rising and falling current runaways, but even in this case, it is shown that the balance is maintained by the runaway signal when the load becomes heavy and the balance is occasionally deviated.

Photo 2 of Figure 7 shows the control of the supplementary power supply during the initial current surge, and Photo 3 shows the brief, rising or falling current surge that occurs intermittently during the period in which the supplementary power supply is in operation.

The photographs shown in Fig. 7 are when observed with an oscilloscope, but other than that, a duty cycle signal or a pulse-shaped signal can be observed by using an LED lamp or various other means. The present invention may also include a means for controlling or monitoring the supplementary power supply as a data signal according to a protocol.

Figure 8 is an algorithm flowchart that logically explains the overall operation of the current runaway command unit.

Referring to Figure 8, the current surge control unit (40) of the present invention operates as follows:

[Step 1] Detect voltage changes and effective current changes (401, 402).

Here, it is desirable to detect voltage changes by VP1, VP2, and VP3. They can be detected interchangeably depending on the number of logical cases.

[Step 2] When the instantaneous change values are compared with each other and an action is included that increases in the same direction, the supplementary power supply is controlled to output in an upward direction (403, 404).

Here, it is desirable to apply the detection of the relative value change immediately before and after the instantaneous change value.

[Step 3] Compare the instantaneous change values and, if they increase or decrease in opposite directions, control the output of the supplementary power supply in the downward direction (405, 406).

Step 405, which is the instantaneous change value detection in Step 3 above, refers to the difference between whether or not they move in opposite directions.

[Step 4] The above output control signal is smoothed by a filtering function and generated as a control output of the supplementary power supply (408, 107, 409, 50). According to one example, this supplementary power supply control signal may be in analog form.

In summary, the current surge command unit of the present invention can be configured to include the flow steps of Step 1, Step 2, Step 3, and Step 4. When each of the above steps operates in hardware, they are processed in real time without step distinction, and when implemented in software using a microcomputer, they can be processed in the above order or in a reversed order.

Figure 9 discloses a configuration that links a pulse detection control unit (60) that controls the output of the supplementary power supply unit (30) of the present invention to suppress or block the output when a surge pulse voltage is detected in the charging system (2; charging control unit and EES unit).

Referring to Fig. 9, if ripple is supplied to the load side or noise is generated from PWM control at the load side, the pulse detection unit (60-1) can detect this preferentially and reduce the output of the supplementary power supply. By this reduction, the surge pulse that may be a risk factor is weakened, and the maximum power tracking unit (40) can obtain time-lag synchronization. The time-lag control may include leading or lagging control that matches the combined phase of the ripple and reverse ripple.

The surge pulse includes the pulse noise mentioned above that occurs in the charging path. Specifically, examples include arc noise that occurs due to poor contact in the circuit, PWM (pulse) noise that occurs in the charger, and spark arc noise that occurs in connectors such as the main power supply.

The meaning that the pulse detection control unit controls the output voltage of the supplementary power supply unit to weaken when a surge pulse is detected by the pulse detection unit may include a configuration that lowers the output of the supplementary power supply unit to the point where the surge pulse disappears.

Referring to Fig. 9, the operation of the pulse detection control unit (60) is explained.

In Fig. 9, since the pulse noise includes an AC signal component, it is supplied to the operational amplifier (60-6) through the capacitor (60-1). Accordingly, the output of the operational amplifier (60-6) generates a (-) polarity signal, and the output is suppressed in the direction of weakening the output of the current runaway control unit (40) through the diode (6-7). For example, the function of the current runaway control unit (40) is urgently weakened when a surge pulse noise occurs by detecting a noisy pulse caused by a PWM control signal generated when charging is completed. If the surge pulse disappears during the weakening, the operational amplifier (60-6) returns the output to normal, and accordingly, the current runaway control unit (40) operates normally as if the pulse detection control unit (60) does not exist. A variable resistor for gain adjustment can be added to the input terminal of the operational amplifier (60-6).

Meanwhile, the set voltage detection control unit (61) functions to limit the maximum value of the DC component or maintain the set voltage. For example, if the output is supplied with a sum voltage (VP1) higher than the voltage required by the load section (4), the function may include lowering the output of the supplementary power supply unit (30). This function functions as a protection circuit that prevents excessive main power supply voltage increase. It can also be implemented as a function that controls VP1 to be maintained within the set voltage range.

As a circuit simplification method, the pulse detection control unit (60) and the set voltage detection unit (61) can be integrated. In this case, the value of the resistance (61-1) corresponding to the input impedance matching can be made sufficiently larger than the value of the resistance (60-2) so that the pulse detection control unit (60) can detect and control both direct current and alternating current.

Figure 10 is an algorithm flowchart that explains the operation of each component illustrated in Figure 9 in more detail.

Referring to Figure 10,

[Step 540] At least one of the detection of the effective current (IP3) supplied to the load (501-1), the detection of the load voltage (501-2), the detection of the main power output voltage (501-3), or the detection of the supplementary power output voltage (501-4) is detected. However, if only some of the steps below are selectively performed, only one of them can be detected.

[Step 550] The pulse detection control unit (60) detects whether there is a surge pulse (503). If there is a surge pulse, the output of the supplementary power supply is suppressed or the supplementary power supply operation switch (30-6) is blocked (504).

[Step 560] Check whether the total voltage (VP1) supplied to the load is higher than the set voltage required by the load (505). This is a safety function that limits the maximum value of the voltage required by the load. If the set range is exceeded, the output of the supplementary power supply is lowered (506).

[Step 570] The sum voltage (VP1) is detected to determine whether it is higher than the previous voltage (506, 512). If it is determined to be higher than the previous voltage, it is considered a high point of the ripple and the supplementary voltage (VP3) is lowered (507) to offset it. If it is determined to be low, it is considered a low point of the ripple and the supplementary voltage (VP3) is raised (513) to offset it.

[Step 580] In the above step 570, the supplementary voltage is lowered (507), and if it is determined that the effective current (IP3) is higher than before at that time, the supplementary voltage is continuously lowered (508, 509). Conversely, if it is determined that the effective current (IP3) is lowered than before due to the lowering (507) action, the supplementary voltage is reversed to increase (510, 511). Meanwhile, in the above step 570, the supplementary voltage is raised (513), and if it is determined that the effective current (IP3) is higher than before at that time, the supplementary voltage is continuously raised (514, 515). Conversely, if it is determined that the effective current (IP3) is lowered than before due to the raising (513) action, the supplementary voltage is reversed to decrease (516, 517).

[Comprehensive Action] Step 570 is an action to cancel out ripples, and stem 580 is an action to track the maximum power point.

That is, the present invention uses the principle that when the effective current increases compared to the previous (n-1), it is a phenomenon when the power source's resonance point is approached, and when the effective current decreases compared to the previous (n-1), it is a phenomenon when the resonance point is passed, to achieve ripple and maximum power tracking at the same time.

Through this algorithm, the supplementary power supply intervenes to supplement the insufficient voltage of the main power supply, matches the optimal load voltage, and furthermore, maintains operation at the power point of maximum efficiency, which is near the resonance point of the power supply. Since the supplementary power supply is controlled by the current runaway control unit, this maximum power tracking centered on the resonance point is directly connected to the principle of ultra-high-speed control through the current runaway control unit.

Figure 11 (I) is an I-V curve and P-V curve graph for explaining the resonance characteristics.

Referring to (I) of Fig. 11, the output voltage (VP2) of the main power supply (1) becomes maximum (Isc) at the load-side short-circuit voltage point (Vsc) where the voltage becomes 0 V on the I-V curve, and at this time, the power becomes 0. Conversely, at the load-side open-circuit voltage point (Voc) where the VP2 voltage becomes maximum, the current (Ioc) becomes 0 and the power becomes 0.

The maximum efficiency is achieved when the sum of the voltage (VP1) of the Pmax point, which obtains the maximum output in Fig. 11, and the voltage required by the load stage (4) match. In the present invention, this match is established at the point where the supplementary voltage section generates the optimal output voltage so that VP2+VP3=VP1, i.e., the effective resonance point. At a voltage lower than Pmax, a tight coupling state occurs in which the power supply is overloaded, and the maximum power cannot be obtained. At Pmax or higher, a loose coupling state occurs in which the power supply cannot properly supply current to the load stage, and thus the maximum power cannot be obtained either.

Therefore, the function of high-speed tracking of the Pmax point becomes a key issue, and this maximum power point can be achieved by tracking the maximum detection value of the effective current detection unit (IP3). In addition, the result of this detection can be achieved by power detection that applies the concept of ‘VP1 x IP3’.

If we continue to organize the actions of Figures 10 and 11,

[Step 560] of Fig. 10 corresponds to an algorithm in which the supplementary power supply outputs a pulsating voltage (VP3) including a reverse ripple signal (△-V) to offset the ripple signal (△V) included in the main power supply voltage (VP2) in (H) of Fig. 11. In addition, [Step 570] of Fig. 10 corresponds to maximum power point tracking (△P) in which the effective current (IP3) is detected in (I) of Fig. 11 to track the power of the Pmax point.

In the terms of the present invention,

Maximum power tracking means detecting the current flowing from the main power supply and tracking the remaining effective current after offsetting the current consumed by the supplementary power supply so that it maintains the maximum value. This detection is handled by the effective current detection unit, and the execution is handled by the current burst control unit, which is an ultra-fast (e.g., real-time in the uS to mS units) response configuration, so as to achieve ripple cancellation and maximum power tracking simultaneously. The functional block that achieves this individually or simultaneously is defined as an inverse ripple function control device in the present invention.

At this time, the maximum power tracking may be performed by repeating feedback control to find the maximum power point while controlling the supplementary power supply to increase the output voltage to cause the main power supply current to run away when the main power supply voltage change value and the effective current change value increase and decrease in opposite directions, and to release the main power supply current from runaway when the main power supply voltage change value and the effective current change value increase and decrease in opposite directions, and then the output voltage of the supplementary power supply may be maintained or tracked around the maximum power point.

The circuit configuration of the current surge control unit of the present invention may include a logic circuit including a combination of at least one of AND, NAND, NOR, EXOR, and NOT, or may be achieved as a programming language using an FPGA chip. It may also be achieved through the configuration of a microcomputer and its program.

The output voltage of the above supplementary power supply unit can be inferred by observing the voltage or ripple change of at least one of the analog direct current or pulse current at the output terminal to determine whether the supplementary power supply unit is regulated. This observation can be configured with an LED or a probe of an oscilloscope. In addition, it can be configured as a check mechanism during mass production using a jig or other tool.

The above supplementary power supply unit may include a configuration that sets an upper limit output voltage to limit the maximum value of the voltage output from the main power supply unit. In this case, it is preferable that it be added in the form of a package to a specific main power supply unit.

The above supplementary power supply system may be configured to be coupled with a data communication node or server to monitor and remotely control at least one of the voltage, current, and power of the above and adjacent main power supplies, and thereby block and control the main power supply path.

The supplementary power supply unit (30) can be operated by connecting an external power supply other than the main power supply unit and linking IP3 with an effective current detection unit configuration using the same principle as above or with a similar configuration inferred from the claims of the present invention.

Instantaneous edge detection can be configured with a hardware sample hold and comparison circuit. In the case of software using a microcomputer, the sampling data can be made to correspond to this.

The mixing circuit can obtain the average of duty ratio signals with opposite polarity, or the average of wide or narrow duty ratio signals with a 50% standard, and the charge pump linked to the rear of the mixing circuit can output a smooth DC as a control signal for the supplementary power supply, or can encode it with an encoder and then use it directly in the supplementary power supply, or can convert it again with a decoder in the supplementary power supply and use it.

In the present invention, the generation of an asynchronous duty ratio signal may include at least one asynchronous signal among PWM (Pulse Width Modulation), PPM (Pulse Position Modulation), PTM (Pulse Timing Modulation), and PFM (Pulse Forming Modulation) generated by applying an AND logic series to a rising command within an initial edge timing range that occurs when there is a change value of a valid current flowing, and applying an OR logic series including a NOT logic to a falling command at the time of the valid current decrease.

Here, the asynchronous signal includes the current surge command signal observed as an output voltage that changes instantaneously at irregular intervals or at irregular levels depending on the load or main power environment.

In the present invention, the effective current detection (IP3) can utilize a resistance sensor or a Hall sensor, and an insulation method using a photocoupler can also be additionally applied.

In the present invention, power means the product of voltage and current, so in terms of charging energy of the EES charging system, ripple voltage is practically synonymous with ripple current.

The function or purpose disclosed in the detailed description of the present invention to control the supplementary power supply in a configuration where the main power supply and the supplementary power supply are connected in series is to indicate that the terminal output of the main power supply has multiple level voltages in order to eliminate ripple or surge pulse on a charging path through a charging system. Therefore, in the functional purpose range of eliminating ripple or surge pulse, the main power supply can be implemented in a configuration integrated with the supplementary power supply.

Specifically, when the main power supply includes a converter (buck, buck-boost, Sepic, etc.) that is linked to the reverse ripple function, the converters included in the main power supply become an integrated configuration of “supplementary power supply linkage for ripple prevention.”

When a plurality of taps (terminals for connecting step voltages) are added to an AC power transformer (transformer) and a switching means is interposed thereto to connect the main power supply and the pulse detection control unit, the transformer (transformer) taps included in the main power supply become an integrated configuration of “supplementary power supply linkage for preventing surge pulses.” In the present invention, the surge pulse includes a noise signal capable of detecting a danger.

In terms of industrial usability, the configuration of the present invention can be implemented as a configuration in which a main power supply unit and a supplementary power supply unit are integrated and mounted, and can be implemented as a structure in which the charging control device for charging the ESS is integrated and accommodated in at least one of a distribution board (distribution board), a junction box, or an inverter. Furthermore, as a charging control device integrated with an ESS, it can be implemented or applied as a DC power backup system for emergency power in, for example, traffic signal control, sound control, communication systems, and mobile chargers.

Meanwhile, the components of the above-described embodiment can be easily understood from a process perspective. That is, each component can be understood as each process. In addition, the process of the above-described embodiment can be easily understood from a component perspective of the device.

In addition, the technical contents described above can be implemented in the form of program commands that can be executed through various computer means and recorded on a computer-readable medium.

The above computer-readable medium may include program commands, data files, data structures, etc., alone or in combination. The program commands recorded on the medium may be those specially designed and configured for the embodiments, or may be those known to and available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and hardware devices specially configured to store and execute program commands, such as ROMs, RAMs, and flash memories. Examples of the program commands include not only machine language codes generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter, etc. The hardware devices may be configured by combining one or more software modules or hardware chips to perform the operations of the embodiments, for example, as a molded package.

The above-described embodiments of the present invention have been disclosed for the purpose of illustration, and those skilled in the art having common knowledge of the present invention will be able to make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions should be considered to fall within the scope of the following patent claims.

Main power supply (1);
Rectifier (1-1);
Smoothing capacitor (1-2);
Power supply transformer (1-3);
ESS, battery (2);
Charging control unit (3);
Subordinate unit (4);
Main power supply output voltage detection unit (VP2);
Charge controller output voltage detection unit (VP1);
Supplementary power supply output voltage detection unit (VP3);
Supplementary power supply (30);
Ripple detection unit (31);
Reverse ripple function generator (32);
Setting voltage detection unit (33);
Maximum power tracking unit (40);
Supplementary power supply operating current (IP1);
The remaining effective current detection unit (IP3) after deducting the power consumption of the supplementary power supply unit;
Burke converter (30-1, 30-2, 30-3, 30-4, 30-5);
Burke converter operating switch (30-6);
Total output current of the main power supply (IP2);
Active current detection unit (IP3);
Voltage deviation (△V, △-V);
Current deviation (△I);
Power deviation (△W);
Current surge control unit (40);
Instantaneous edge detection unit (40-1, 40-2);
Rising current surge command unit (40-3);
Rising current surge stop command (40-4);
Mixed balance section (40-7);
Filter section (40-7, 40-8);
Pulse detection unit (60-3);
Pulse detection control unit (60);
AC voltage limiter (60-1);
DC voltage limiter (60-4);
Bypass section (30-3);
Coil (30-4);
Capacitor (30-5);
MOSFET(30-1);

Claims (3)

A main power supply that rectifies and outputs AC power;
A charging system that receives charging power from the main power supply and an ESS unit that stores charging energy;
A supplementary power supply unit that assists the main power supply unit to supply power to the charging system or controls the output of the main power supply unit;
A ripple detection unit that detects the ripple when the output voltage (or output current) of the main power unit is a pulse current including ripple;
A configuration including a reverse ripple function generating unit that generates a reverse ripple opposite to the ripple detected from the above ripple detecting unit;
The output of the above supplementary power supply and the above main power supply is combined and supplied to the charging system, and when a ripple is detected from the ripple detection unit, the pulse output by the reverse ripple function from the reverse ripple function generation unit is linked, so that the charging energy is controlled to become a direct current with the ripple canceled out.
The above supplementary power supply unit supplies operating power by feeding back part of the power of the main power supply unit or from an independent external power supply.
The main power supply or supplementary power supply is linked with a pulse detection control unit that controls the output voltage of the main power supply to be adjusted downward when a pulse voltage according to the completion of charging of the ESS unit is detected in the charging system;
An ESS charging control device characterized in that the above ESS unit includes a configuration linked to a backup power system for responding to a power outage. A main power supply configured to rectify and output AC power and to control the output voltage into multiple level voltages;
A charging system that receives charging power from the main power supply and an ESS unit that stores charging energy;
The above main power unit is linked with a pulse detection control unit that controls the supply of the charging energy when a pulse voltage according to the completion of charging of the ESS unit in the charging system is detected.
The above charging system charges the ESS unit, and when the pulse voltage is detected by the pulse detection control unit, the voltage of the main power unit is adjusted downward.
An ESS charging control device characterized in that the above ESS unit includes a configuration linked to a backup power system for responding to a power outage. In either of paragraphs 1 or 2,
An ESS charging control device characterized in that it further includes a configuration in which the supplementary power supply unit or the main power supply unit further includes an active current detection unit that detects an active current supplied to a load unit, and a current runaway control unit that tracks and controls the coupling of the main power supply unit and the load unit to be maintained at maximum power.