CN110071625A - Drive control circuit, air-conditioner controller and air conditioner - Google Patents
Drive control circuit, air-conditioner controller and air conditioner Download PDFInfo
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- CN110071625A CN110071625A CN201910447808.7A CN201910447808A CN110071625A CN 110071625 A CN110071625 A CN 110071625A CN 201910447808 A CN201910447808 A CN 201910447808A CN 110071625 A CN110071625 A CN 110071625A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
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- H02M1/32—Means for protecting converters other than automatic disconnection
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Abstract
The invention proposes a kind of drive control circuit, air-conditioner controller and a kind of air conditioners.Wherein, drive control circuit includes: the first resistance element and first switching element, and first switching element is configured as the first resistance element of control and absorbs surging signal, is serially connected between high voltage bus and low-voltage bus bar after the first resistance element and first switching element series connection；One-way conduction element or second switch element；First capacitive element, one-way conduction element or second switch element are configured as the surging signal on limitation the first capacitive element absorption high voltage bus, and one-way conduction element or second switch element are serially connected between high voltage bus and low-voltage bus bar after connecting with the first capacitive element；Chip is controlled, control chip is connected with first switching element, wherein control chip controls the work of the first resistance element according to the size relation of bus signal and voltage threshold.Path and second is absorbed by setting first and absorbs path, improves the reliability of drive control circuit.
Description
This application claims on 01 16th, 2019 submission Patent Office of the People's Republic of China, application No. is 201910041711.6, invention
The priority of the Chinese patent application of entitled " drive control circuit, air-conditioner controller and air conditioner ", entire contents pass through
Reference is incorporated in the present application.
Technical field
The present invention relates to field of circuit technology, in particular to a kind of drive control circuit, a kind of air-conditioner controller and
A kind of air conditioner.
Background technique
Such as compressor, motor, engine threephase load equipment use AC-DC-exchange topological structure, specifically,
AC-DC-exchange topological structure is as shown in Figure 1, comprising: AC power supply module, power filtering module, rectification module, filtering
Module, inverter module and load.
Wherein, the power frequency component after filter module needs to rectify rectification module is filtered, based on cost and can
Electrolytic capacitor capacity in the requirement of property, filter module reduces, or even the scheme of electrolytic capacitor is replaced using thin-film capacitor.
However the scheme for either reducing the capacity of electrolytic capacitor still uses the side of the electrolytic capacitor of thin-film capacitor substitution
Case can all cause circuit to reduce the absorbability of surge, cause the overtension on DC bus, be easy to cause direct current female
Component damage on line.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, first aspect of the present invention is to propose a kind of drive control circuit.
The second aspect of the invention is to propose a kind of air-conditioner controller.
The third aspect of the invention is to propose a kind of air conditioner.
In view of this, according to the first aspect of the invention, proposing a kind of drive control circuit, comprising: inverter bridge, it is inverse
Become bridge and be used for output drive signal, inverter bridge accesses between high voltage bus and low-voltage bus bar；Reactor, for absorbing driving control
The surging signal generated during circuit drives load running processed, reactor access between power grid and load；Bus capacitor, it is female
Line capacitance powers on required starting voltage for providing load, and bus capacitor is also used to absorb surging signal, bus capacitor access
In the two buss lines of inverter bridge input side；First resistance element and first switching element, first switching element are configured as controlling
It makes the first resistance element and absorbs surging signal, be serially connected in high voltage bus and low after the first resistance element and first switching element series connection
It presses between bus；One-way conduction element or second switch element；First capacitive element, one-way conduction element or second switch element
Be configured as the first capacitive element of limitation and absorb surging signal on high voltage bus, one-way conduction element or second switch element with
It is serially connected between high voltage bus and low-voltage bus bar after the series connection of first capacitive element；Control chip, control chip and first switch member
Part is connected, wherein control chip controls the work of the first resistance element according to the size relation of bus signal and voltage threshold.
The drive control circuit of embodiment according to the present invention, comprising: inverter bridge, bus capacitor, reactor, wherein inversion
Bridge drive control load running, such as: control motor operation, since the capacitance of bus capacitor is lower, the shape on high voltage bus
At surging signal be unable to ensure and fully absorb, drive control circuit is absorbed by setting reactor and drives load running process
The surging signal of middle generation, while also power supply input signal is filtered, so that when from inverter bridge side and instantaneous shutdown
The surging signal of reactor afterflow is inhaled via first that one-way conduction element or second switch element and the first capacitive element form
It receives path to be discharged, realizes the control to surging signal, while ensuring that the surging signal on bus is absorbed, also set up first
The second absorption path that resistance element and first switching element are constituted absorbs surging signal, specifically, controls chip
Control whether the first resistance element absorbs surging signal according to the size relation of bus signal and voltage threshold, first absorbs path
Setting with the second absorption path improves the absorbability of the surging signal in circuit, improves the reliability of circuit, wherein
One-way conduction element can be the element with one-way conduction characteristic, diode etc..
Drive control circuit according to the abovementioned embodiments of the present invention can also have following technical characteristic:
In the above-mentioned technical solutions, further, further includes: the second resistance element, the second resistance element is for discharging the
Surging signal in one capacitive element, the second resistance element are in parallel with the first capacitive element.
In the technical scheme, after the surging signal that the first capacitive element absorbs on high voltage bus, the of setting is utilized
Two resistance elements discharge the surging signal in the first capacitive element, and the setting of the second resistance element improves drive control circuit
Reliability, reduce the capacity requirement of Absorption Capacitance.
In any of the above-described technical solution, further, further includes: the second capacitive element, for absorbing high voltage bus
Surging signal, the second capacitive element connects with the first capacitive element.
In the technical scheme, when the voltage of high voltage bus is larger, second is connected on the basis of the first capacitive element
Capacitive element, to improve the absorbability of the surging signal of high voltage bus.
In any of the above-described technical solution, further, further includes: third resistance element, third resistance element is for releasing
The surging signal in the second capacitive element is put, third resistance element is in parallel with the second capacitive element.
In the technical scheme, in the case where the second capacitive element is arranged, by the way that third resistance element and second is arranged
Resistance element is used cooperatively, the voltage of the first capacitive element of Lai Pingheng and the second capacitive element both ends, while third resistance element
It is also used to discharge the surging signal on the second capacitive element, to improve the reliability of drive control circuit.
In any of the above-described technical solution, further, further includes: the 4th resistance element flows to the first appearance for limiting
The electric current of property element and/or the second capacitive element, the 4th resistance element, first switching element and the first capacitive element are mutually gone here and there
Connection；Or the 4th resistance element, first switching element, the first capacitive element and the second capacitive element are connected in series.
In the technical scheme, resistive with the first capacitive element and/or the second capacitive element the concatenated 4th by being arranged
Element is prevented using limiting the electric current for flowing to the first capacitive element and/or the second capacitive element for the 4th resistance element
First capacitive element and/or the second capacitive element and the resistance element of parallel connection are damaged due to overcurrent, improve drive control electricity
The reliability on road.
In any of the above-described technical solution, further, further includes: arresting element, for discharging in the first resistance element
Peak voltage signal, arresting element is in parallel with the first resistance element.
In the technical scheme, by the way that arresting element is arranged, the surge letter on high voltage bus is absorbed in the first resistance element
After number, the peak voltage signal on first resistive yuan is discharged using the arresting element in parallel with the first resistance element is arranged, is put
The setting of electric device improves the reliability of drive control circuit.
In any of the above-described technical solution, further, second switch element is connected with control chip, and control chip is used
Second switch element conductive or cut-off are controlled in detection bus signal, and according to bus signal.
In the technical scheme, the second switch element of setting realizes the first controllability for absorbing path, controls chip root
Second switch element is controlled according to the size relation of bus signal and voltage threshold, and then realizes that the first capacitive element absorbs surge letter
Number control.By the way that second switch element is arranged, the controllability of drive control circuit is improved, surge absoption ability is being improved
Under the premise of, improve the reliability of drive control circuit.
In any of the above-described technical solution, further, voltage threshold includes first voltage threshold value and second voltage threshold value；
Control chip is specifically used for: bus signal is greater than or equal to first voltage threshold value and is less than second voltage threshold value, controls first switch
Element cut-off, second switch element conductive；Bus signal is greater than or equal to second voltage threshold value, controls first switching element and the
Two switching elements conductives；Bus signal is less than first voltage threshold value, controls first switching element and the cut-off of second switch element.
In the technical scheme, by by bus signal (voltage signal of such as high voltage bus) and first voltage threshold value and the
Two voltage thresholds are compared, and control the first capacitive element and the first resistance element respectively according to comparison result to absorb surge
Signal is specifically greater than or equal to the case where first voltage threshold value is less than second voltage threshold value in the voltage signal of high voltage bus
Under, control first switching element cut-off, second switch element conductive carries out the suction of surging signal using the first capacitive element
It receives, in the case where the voltage signal of high voltage bus is greater than or equal to second voltage threshold value, controls first switching element and second
Switching elements conductive, and then realize and quickly absorb surge, it avoids because the overtension on high voltage bus causes drive control electric
The component damage on road；In the case where the voltage signal of high voltage bus is less than first voltage threshold value, first switching element is controlled
End with second switch element, and then carries out the absorption of surging signal by bus capacitor, while improving the first absorption road
The service life of component in diameter and the second absorption path.
In any of the above-described technical solution, further, drive control circuit further include: rectification circuit, rectification circuit pair
AC signal rectified after output be bus signal, bus signal through high voltage bus and low-voltage bus bar export to bus capacitor,
Inverter bridge and load, wherein control chip controls the on state and second switch member of first switching element according to AC signal
The on state of part.
In any of the above-described technical solution, further, bus capacitor is thin-film capacitor.
According to the second aspect of the invention, a kind of air-conditioner controller is proposed, including such as any of the above-described drive control
Circuit, therefore the air-conditioner controller has whole beneficial effects of drive control circuit described in any of the above-described embodiment, herein
It repeats no more.
According to the third aspect of the present invention, a kind of air conditioner is proposed, comprising: motor；And such as any of the above-described technology
Drive control circuit described in scheme, the signal input part of the motor are connected to the drive control circuit, the driving control
The driving signal of circuit output processed is for driving the motor operation.Therefore the air conditioner has described in any of the above-described embodiment
Whole beneficial effects of drive control circuit, details are not described herein.
Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention
Recognize.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 shows AC-DC-exchange topological structure in the prior art；
Fig. 2 shows the drive control circuit schematic diagrames of one embodiment of the present of invention；
Fig. 3 shows the drive control circuit schematic diagram of another embodiment of the invention；
Fig. 4 shows the drive control circuit schematic diagram of yet another embodiment of the present invention；
Fig. 5 shows the drive control circuit schematic diagram of another embodiment of the invention；
Fig. 6 shows the drive control circuit schematic diagram of another embodiment of the invention；
Fig. 7 shows the drive control circuit schematic diagram of another embodiment of the invention；
Fig. 8 shows the drive control circuit schematic diagram of another embodiment of the invention；
Fig. 9 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 10 shows the first voltage threshold value of one embodiment of the present of invention and the schematic diagram of second voltage threshold value.
Wherein, the corresponding relationship between appended drawing reference and component names of the Fig. 2 into Fig. 9 are as follows:
102 inverter bridges, 104 first switching elements, 106 arresting elements, 108 rectification circuits.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to be more clearly understood that aforementioned aspect of the present invention, feature and advantage
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not limited to following public affairs
The limitation for the specific embodiment opened.
The embodiment of first aspect present invention proposes a kind of drive control circuit, as shown in Figure 3 and Figure 4, drive control electricity
Road includes: reactor Ldc, for absorbing the surging signal generated during drive control circuit driving load running, reactor
Ldc is accessed between power grid and load；Bus capacitor C1, bus capacitor C1Required starting voltage is powered on for providing load, it is female
Line capacitance C1It is also used to absorb surging signal, bus capacitor C1It accesses in the two buss lines of inverter bridge input side；First resistive yuan
Part R1With first switching element 104, first switching element 104 is configured as the first resistance element R of control1Surging signal is absorbed, the
One resistance element R1And it is serially connected between high voltage bus and low-voltage bus bar after the series connection of first switching element 104；One-way conduction element
Or second switch element；First capacitive element C2, one-way conduction element or second switch element are configured as the first capacitive of limitation
Element C2Absorb the surging signal on high voltage bus, one-way conduction element or second switch element and the first capacitive element C2Series connection
After be serially connected between high voltage bus and low-voltage bus bar；Chip (not shown) is controlled, control chip is connected with first switching element 104
It connects, wherein control chip controls the first resistance element R according to the voltage signal of high voltage bus and the size relation of predeterminated voltage1
Work.
Specifically, in one-way conduction element D1With the first capacitive element C2When series connection, drive control circuit includes: inverter bridge
102, bus capacitor C1, reactor Ldc and one-way conduction element D1, wherein 102 drive control load running of inverter bridge, such as control
Motor operation, due to bus capacitor C1Capacitance it is lower, therefore the surging signal formed on high voltage bus is unable to ensure completely
It absorbs, by the way that reactor Ldc is arranged, to absorb the surging signal generated during drive control circuit driving load running, into
And block the surging signal from inverter bridge side, so that the surging signal from inverter bridge side is via one-way conduction member
Part D1With the first capacitive element C2First absorption path of composition is discharged, and realizes the control to surging signal, while ensuring mother
Surging signal on line is absorbed completely, also sets up the first resistance element R1It is absorbed with first switching element 104 is constituted second
Path absorbs surging signal, and specifically, control chip is controlled according to the size relation of bus signal and voltage threshold
First resistance element R1Whether surging signal is absorbed, and the setting in the first absorption path and the second absorption path improves in circuit
The absorbability of surging signal improves the reliability of circuit, specifically, one-way conduction element D1Anode and high voltage bus phase
Connection, one-way conduction element D1Cathode via the first capacitive element C2It is connected with low-voltage bus bar, wherein one-way conduction element
D1It can be the element with one-way conduction characteristic, diode etc., voltage threshold is related to the voltage of high voltage bus.
Specifically, as shown in Fig. 2, the first resistance element R1Include in drive control circuit with first switching element 104
Thermo-sensitive resistor PTC11, thermo-sensitive resistor PTC12With thermo-sensitive resistor PTC13When circuit diagram, wherein each thermo-sensitive resistor is in parallel
One relay switch is set.
In one embodiment of the invention, as shown in Figure 3 and Figure 4, drive control circuit further include: the second resistance element
R2, the second resistance element R2For discharging the first capacitive element C2In surging signal, the second resistance element R2With the first capacitive member
Part C2It is in parallel.
In this embodiment, in the first capacitive element C2After absorbing the surging signal on high voltage bus, the of setting is utilized
Two resistance element R2To discharge the first capacitive element C2In surging signal, the second resistance element R2Setting improve driving control
The reliability of circuit processed.
In one embodiment of the invention, as shown in Figure 3 and Figure 4, further includes: the second capacitive element C3, for absorbing
Surging signal on high voltage bus, the second capacitive element C3With the first capacitive element C2Series connection.
In this embodiment, when the pressure of high voltage bus is larger, in the first capacitive element C2On the basis of connect second
Capacitive element C3, to improve the absorbability of the surging signal of high voltage bus.
In one embodiment of the invention, as shown in Figure 3 and Figure 4, further includes: third resistance element R3, third is resistive
Element R3For discharging the second capacitive element C3In surging signal, third resistance element R3With the second capacitive element C3It is in parallel.
In this embodiment, the second capacitive element C is being set3In the case where, by the way that third resistance element R is arranged3With second
Resistance element R2It is used cooperatively, the first capacitive element of Lai Pingheng C2With the second capacitive element C3The voltage at both ends, while third is resistive
Element R3It is also used to the second capacitive element C3On surging signal discharged, to improve the reliability of drive control circuit.
In one embodiment of the invention, as shown in Figure 3 and Figure 4, further includes: the 4th resistance element R4, for limiting
Flow to the first capacitive element C2And/or the second capacitive element C3Electric current, the 4th resistance element R4, first switching element 104 and
First capacitive element C2It is connected in series；Or the 4th resistance element R4, first switching element 104, the first capacitive element C2And second hold
Property element C3It is connected in series.
In this embodiment, pass through setting and the first capacitive element C2And/or the second capacitive element C3Concatenated 4th is resistive
Element R4, utilize the 4th resistance element R4To flowing to the first capacitive element C2And/or the second capacitive element C3Electric current limited
System is prevented the first capacitive element and/or the second capacitive element and the resistance element of parallel connection from being damaged due to overcurrent, improves driving
The reliability of control circuit.
In one embodiment of the invention, as shown in Figure 3 and Figure 4, further includes: arresting element 106, for discharging first
Resistance element R1In peak voltage signal, arresting element 106 and the first resistance element R1It is in parallel.
In this embodiment, by the way that arresting element 106 is arranged, in the first resistance element R1Absorb the surge on high voltage bus
After signal, setting and the first resistance element R are utilized1In parallel arresting element 106 discharges the first resistance element R1The point of upper generation
Peak voltage signal, the setting of arresting element 106 improve the reliability of drive control circuit.
Further, as shown in figure 5, arresting element 106 is diode.
In an embodiment of the invention, as shown in fig. 6, second switch element is connected with control chip, chip is controlled
Second switch element conductive or cut-off are controlled for detecting bus signal, and according to bus signal.
In the technical scheme, the second switch element of setting realizes the first controllability for absorbing path, controls chip root
Second switch element is controlled according to the size relation of bus signal and voltage threshold, and then realizes the first capacitive element C2Absorb surge
The control of signal.By the way that second switch element is arranged, the controllability of drive control circuit is improved, surge absoption ability is being improved
Under the premise of, improve the reliability of drive control circuit.
As shown in Figure 6 to 8, wherein Fig. 6 is one embodiment of the setting position of surge absorbing circuit in Fig. 4, Fig. 7
It is the connection relationship that Fig. 6 can be implemented with Fig. 8.Detect that whether there is or not overcurrent signal control first switch members according to flow element
104 on or off of part.
In implementing at the present invention one, as shown in Fig. 4 and Figure 10, predeterminated voltage includes first voltage threshold value V2With the second electricity
Press threshold value V1；Control chip is specifically used for: being greater than or equal to first voltage threshold value V in the voltage signal of high voltage bus2Less than second
Voltage threshold V1In the case where, control first switching element 104 is ended, second switch element conductive；In the voltage of high voltage bus
Signal is greater than or equal to second voltage threshold value V1In the case where, control first switching element 104 and second switch element conductive；?
The voltage signal of high voltage bus is less than first voltage threshold value V2In the case where, control first switching element 104 and second switch member
Part cut-off.
In the technical scheme, by by the voltage signal of high voltage bus and first voltage threshold value V2With second voltage threshold value
V1It is compared, and controls the first capacitive element C respectively according to comparison result2With the first resistance element R1Absorb surging signal,
Specifically, it is greater than or equal to first voltage threshold value V in the voltage signal of high voltage bus2Less than second voltage threshold value V1In the case where,
It controls first switching element 104 to end, second switch element conductive utilizes the first capacitive element C2To carry out the suction of surging signal
It receives, is greater than or equal to second voltage threshold value V in the voltage signal of high voltage bus1In the case where, control 104 He of first switching element
Second switch element conductive, and then realize and quickly absorb surge, it avoids because the overtension on high voltage bus causes driving to control
The component damage of circuit processed；It is less than first voltage threshold value V in the voltage signal of high voltage bus2In the case where, control first is opened
Element 104 and the cut-off of second switch element are closed, and then carries out by bus capacitor the absorption of surging signal, while improving the
One, which absorbs path and second, absorbs the service life of component in path, wherein first voltage threshold value V2With second voltage threshold value V1According to
Bus capacitor C1And drive control circuit surge absoption ability is related.
In one embodiment of the invention, drive control circuit further include: rectification circuit 108,108 pairs of rectification circuit friendships
Output is bus signal after stream signal is rectified, and bus signal is exported through high voltage bus and low-voltage bus bar to bus capacitor, inverse
Become bridge 102 and load, wherein control chip is opened according to the on state and second that AC signal controls first switching element 104
Close the on state of element.
Specifically, control chip controls first switching element 104 according to the corresponding relationship of AC signal and voltage threshold
The on state of on state and second switch element, wherein the voltage threshold of voltage threshold and bus signal is correspondingly arranged.
As shown in Fig. 4 and Figure 10, when drive control circuit powers on for the first time, switch element is disconnected, and input power is through reactance
Device Lac, filter circuit, rectification circuit 108, reactor Ldc give bus capacitor C1Charging, while passing through one-way conduction element D1It is past
First capacitive element C2With the second capacitive element C3Charging, the first resistance element R1, the busbar voltage protection threshold of resistance value and setting
Value, the overcurrent capability of first switching element 104 are related, it is worth noting that, the 4th resistance element R4And the first capacitive element C2
Selection and the first resistance element R1Inductance it is related, if the first resistance element R1It is noninductive resistance, then it can be without using the
Four resistance element R4, the first capacitive element C2And arresting element 106.Arresting element 106 can choose diode, i.e., by anti-
It discharges to the mode of parallel diode, the selection of anti-parallel diodes and the first resistance element R1Inductance and resistance value
It is related.
In breakover element D1In the case where diode, when model machine operates normally, the first capacitive element C2With the second capacitive member
Part C3On voltage maintain DC bus-bar voltage maximum of points, the first resistance element R1On first switching element 104 disconnect,
Compressor winding, the inductance afterflow of alternating current-direct current side and compression when surge energy is mainly derived from power input, model machine disorderly closedown
Maneuver energy；When there are surging signal, due to the bus capacitor C of low capacity1Excessive energy can not be absorbed, busbar voltage is higher than
The first capacitive element of surge C2With the second capacitive element C3When holding voltage, the first capacitive element C2With the second capacitive element C3It acts as
With remaining energy flows into bus capacitor C1With the first capacitive element C2With the second capacitive element C3, as surge energy is inhaled
It receives, high voltage bus voltage slowly increases (the first capacitive element C2With the second capacitive element C3Capacitance it is bigger, the electricity of high voltage bus
Pressure lifting is slower)；When high voltage bus voltage is higher than some setting value (V1 of such as Figure 10 can be set as 720V), first resistive yuan
Part R1Intervention, switch element start the form modulated with pulse width or fixed form conducting；Guarantee busbar voltage in height with this
Voltage on pressure bus is as steady as possible when occurring.As surge capacity is absorbed, busbar voltage starts to reduce, when lower than some
Setting value (V2 of such as Figure 10 can be set as 700V), switch element disconnect.
In breakover element D1In the case where switch element, when model machine powers on, two switch elements are disconnected, and are operated normally
When bus capacitor C1Work, (the first capacitive element C2With the second capacitive element C3) surge energy is mainly derived from power input, sample
Compressor winding, the inductance afterflow of alternating current-direct current side and compression maneuver energy when machine disorderly closedown；When there are surge voltage, due to small
The bus capacitor C of capacity1(thin-film capacitor) can not absorb excessive energy, when the voltage of high voltage bus is higher than some fixed value
When (such as 680V), the first capacitive element C2With the second capacitive element C3Switch element closure, at this time surge energy almost all into
Enter the first capacitive element C2With the second capacitive element C3It absorbs, busbar voltage may be reduced first at this time, rear slowly to rise；Work as height
When the voltage of pressure bus rises above some setting value (V1 of such as Figure 10 can be set as 720V), the first resistance element R1Intervention,
Switch element starts to be connected with pulse width modulated form or fixed form；Guarantee busbar voltage when surge voltage occurs with this
It is as steady as possible.As surge capacity is absorbed, busbar voltage starts to reduce, when lower than some setting value, (V2 of such as Figure 10, can
It is set as 700V), switch element disconnects.
Wherein, Lac refers to practical Inductor model and input power cord inductance, and it includes inductance and resistances.?
In one embodiment of the present of invention, as shown in figure 9, the 5th resistance element R of reactor Ldc parallel connection5, as system damping resistance,
Lifting system stability.
It is worth noting that Lac and Ldc are in order to which (Electro Magnetic Compatibility, electromagnetism are simultaneous by EMC
Capacitive, refer to equipment or system meet the requirements in its electromagnetic environment operation in its environment any equipment generation can not
The ability for the electromagnetic interference endured) harmonic requirement and exist, if it is there is a harmonic requirement region, there may be Lac on model machine
There may be Ldc, in some instances it may even be possible to which Lac and Ldc coexist.And no harmonic requirement region, Lac and Ldc are not present, but
For high-frequency harmonic problem (if ignoring the problem, Ldc inductance can not used), can make at the position Ldc of circuit topology
With a lesser Ldc2, a small damping resistance in parallel is to improve system stability on this lesser Ldc2.
PTC is the abbreviation of Positive Temperature Coefficient, means positive temperature coefficient, refers to just
Temperature coefficient very big semiconductor material or component.The PTC that usually we mention refers to posive temperature coefficient thermistor.
Pass through breakover element D1With being used cooperatively for first switching element 104, realizes and guarantee busbar voltage lower than design
Ceiling voltage (such as 720V), stability that is close and improving drive control circuit, while can reduce breakover element D1With first
Switch element 104 device capacitance and resistance value in the paths, and then reduce cost.
In any of the above-described embodiment, further, bus capacitor C1For thin-film capacitor.
In one particular embodiment of the present invention, the capacitance of thin-film capacitor is lower than default capacitance, wherein default capacitance is pressed
It is calculated according to following calculation formula:
Wherein, CdcFor preset capacity, LSIt is the total inductance value of equivalent drive control circuit DC side, PLIt is drive control electricity
The bearing power on road, RSFor the all-in resistance of equivalent drive control circuit DC side, vdc0For busbar voltage average value, for example, with 7P
For model machine, C can be determined according to the calculation formuladc840uF is had to be larger than, preset capacity is 840uF or more, is being embodied
When be 1230uF.
The embodiment of second aspect of the present invention proposes a kind of air-conditioner controller, including such as any of the above-described drive control electricity
Road, therefore the air-conditioner controller has whole beneficial effects of the drive control circuit of any of the above-described embodiment, it is no longer superfluous herein
It states.
The embodiment of third aspect present invention proposes a kind of air conditioner, comprising: motor；And such as any of the above-described technical side
The drive control circuit of case, the signal input part of motor are connected to drive control circuit, the driving letter of drive control circuit output
Number for driving motor run.Therefore the air conditioner have any of the above-described embodiment drive control circuit all beneficial to imitate
Fruit, details are not described herein.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of drive control circuit, comprising: inverter bridge, the inverter bridge are used for drive control load running, the inverter bridge
It accesses between high voltage bus and low-voltage bus bar characterized by comprising
Reactor drives the surging signal generated during the load running for absorbing the drive control circuit, described
Reactor accesses between power grid and the load；
Bus capacitor, the bus capacitor are used to provide the described load and power on required starting voltage, and the bus capacitor is also used
In absorbing the surging signal, the bus capacitor access is in the two buss lines of inverter bridge input side；
First resistance element and first switching element, the first switching element are configured as controlling the first resistance element suction
The surging signal is received, is serially connected in the high voltage bus and institute after first resistance element and first switching element series connection
It states between low-voltage bus bar；
One-way conduction element or second switch element；
First capacitive element, the one-way conduction element or the second switch element are configured as limiting the first capacitive member
Part, which absorbs the surging signal on the high voltage bus, the one-way conduction element or the second switch element and described first, to be held
Property element series connection after be serially connected between the high voltage bus and the low-voltage bus bar；
Chip is controlled, the control chip is connected with the first switching element, wherein control chip is believed according to the bus
Number controlling first resistance element with the size relation of voltage threshold works.
2. drive control circuit according to claim 1, which is characterized in that further include:
Second resistance element, second resistance element are used to discharge surging signal in first capacitive element, and described the
Two resistance elements are in parallel with first capacitive element.
3. drive control circuit according to claim 2, which is characterized in that further include:
Second capacitive element, for absorbing the surging signal on the high voltage bus, second capacitive element and described first
Capacitive element series connection.
4. drive control circuit according to claim 3, which is characterized in that further include:
Third resistance element, the third resistance element are used to discharge surging signal in second capacitive element, and described the
Three resistance elements are in parallel with second capacitive element.
5. drive control circuit according to claim 4, which is characterized in that further include:
4th resistance element, it is described for limiting the electric current for flowing to first capacitive element and/or second capacitive element
4th resistance element, the first switching element and first capacitive element are connected in series；Or the 4th resistance element, institute
First switching element, the first capacitive element and second capacitive element is stated to be connected in series.
6. drive control circuit according to claim 1, which is characterized in that further include:
Arresting element, for discharging the peak voltage signal in first resistance element, the arresting element and described first
Resistance element is in parallel.
7. drive control circuit according to claim 1, which is characterized in that the second switch element and control chip phase
Connection, the control chip control the second switch element conductive for detecting bus signal, and according to the bus signal
Or cut-off.
8. drive control circuit according to claim 7, which is characterized in that the voltage threshold includes first voltage threshold value
With second voltage threshold value,
The control chip is specifically used for: the bus signal is greater than or equal to first voltage threshold value and is less than the second voltage threshold
Value controls the first switching element cut-off, the second switch element conductive；
The bus signal is greater than or equal to the second voltage threshold value, controls the first switching element and the second switch
Element conductive；
The bus signal controls the first switching element and second switch element cut-off less than the first predeterminated voltage.
9. drive control circuit according to claim 8, which is characterized in that the drive control circuit further include:
Rectification circuit, output is the bus signal, the bus signal after the rectification circuit rectifies AC signal
It exports through the high voltage bus and the low-voltage bus bar to the bus capacitor, the inverter bridge and the load,
Wherein, the control chip controls the on state and second switch of the first switching element according to the AC signal
The on state of element.
10. a kind of air-conditioner controller characterized by comprising
Drive control circuit as claimed in any one of claims 1-9 wherein.
11. a kind of air conditioner characterized by comprising
Motor；
Drive control circuit as claimed in any one of claims 1-9 wherein, the signal input part of the motor are connected to the drive
Dynamic control circuit, the driving signal of the drive control circuit output is for driving the motor operation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019100417116 | 2019-01-16 | ||
| CN201910041711 | 2019-01-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110071625A true CN110071625A (en) | 2019-07-30 |
Family
ID=67371601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910447808.7A Pending CN110071625A (en) | 2019-01-16 | 2019-05-27 | Drive control circuit, air-conditioner controller and air conditioner |
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| Country | Link |
|---|---|
| CN (1) | CN110071625A (en) |
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