CN107276393A - A kind of high-voltage power circuit - Google Patents
A kind of high-voltage power circuit Download PDFInfo
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- CN107276393A CN107276393A CN201710610406.5A CN201710610406A CN107276393A CN 107276393 A CN107276393 A CN 107276393A CN 201710610406 A CN201710610406 A CN 201710610406A CN 107276393 A CN107276393 A CN 107276393A
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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
- H02M3/00—Conversion of dc power input into dc power output
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of high-voltage power circuit, pass through the DC DC converters of balanced voltage, so that the voltage of two electric capacity of input realizes automatic equalization, the DC DC converters transmitted by power transfer energy to secondary, the electric voltage equalization of series capacitance is balanced while realizing energy transmission, parts selection is difficult when solving wide-range high-voltage input simultaneously, the problem of cost is high and controls complicated；In the auxiliary switch power application of wide scope, high input voltage, decline the cost of product, reliability is lifted.
Description
Technical field
The present invention relates to the switch converters in switch converters field, more particularly to high voltage power supply conversion.
Background technology
The field of power electronics is developed rapidly so that the application of high frequency switch power is more and more extensive.Traditional industry and
The input of domestic switch power supply is frequently necessary to from power network power taking, after the current rectifying and wave filtering circuit of power source internal, becomes higher
Direct current, then be input to circuit for power conversion, become low-voltage DC, electric energy is provided for load.In order to adapt to country variant
Power network standard, the Switching Power Supply of general two cross streams input, its input voltage range is 85VAC~264VAC, rectifying and wave-filtering
DC voltage afterwards is about 120VDC~373VDC.For the Switching Power Supply of this occasion, according to the difference of power, for its selection
Circuit topology it is more, such as have it is simple in construction, with low cost the features such as flyback, forward converter；It is complicated, but with soft
The LLC of switching function, asymmetrical half-bridge, phase whole-bridging circuit etc..
With the fast development of New Energy Industry, the industry such as electric automobile, wind-power electricity generation, photovoltaic inputs electricity to superelevation ultra-wide
Press the demand of the Switching Power Supply of scope more and more, and require more and more harsh.The electricity that the charging pile of electric automobile industry is used
Source requires that input voltage range is 200VDC~800VDC, and some requirements reach the 1000VDC upper limits；Wind-power electricity generation and photovoltaic industry
The power supply product requirement input voltage range that uses such as photovoltaic combiner box, inverter reach 150VDC~1500VDC.With these
The continuous improvement of voltage, it is also proposed higher requirement, simultaneously for DC- for the accessory power supply DC-DC converter powered
The problem of parts selection of DC converters also brings a lot.Such as main switching device mosfet, its conducting resistance is with electricity
The lifting of pressure has become greatly a lot, necessarily to cause conduction loss to become big, the problem of further resulting in the reduction and thermal design of efficiency.
In order to reduce the voltage stress of switching tube, three level translators and block coupled in series technology obtain more research and should
With.For three level or multilevel converter, although can reduce the stress of device, but increasing with switching device, control
System strategy and driving become complicated also with increasing for number of devices, while there is also more stress inside three Level Technologies
Uneven the problem of, to solve these problems, it is proposed that many solutions, these schemes undoubtedly add the complexity of circuit,
Require that higher occasion adds cost and complexity in accessory power supply；For multimode serial connection technology, although individual module letter
It is single, but to meet the problems such as pressing with dynamic, take more complicated control strategy.
These technologies are for accessory power supply DC-DC conversion, although can reduce the stress of device, but the control of product
It is tactful complicated, it largely have impact on product reliability and cost.
The content of the invention
In view of this, the problem of present invention is solves above-mentioned is there is provided a kind of high-voltage power circuit circuit, applied to wide model
Enclose, in the power supply of high input voltage so that product design and the control of product are simple, and product reliability is lifted.
The object of the present invention is achieved like this, a kind of high-voltage power circuit, and high-tension electricity is converted into low tension, including：
Input positive pole, input negative pole, the first electric capacity, the second electric capacity, the first DC-DC converter, output end DC-DC converter.
The input positive pole connects the anode of the first electric capacity, and the negative terminal of the first electric capacity connects the anode of the second electric capacity, second
The negative terminal connection input negative pole of electric capacity；
The anode of input the first electric capacity of positive connection of first DC-DC converter, the input of the first DC-DC converter is born
Connect the negative terminal of the first electric capacity, the anode of output the second electric capacity of positive connection of the first DC-DC converter, the first DC-DC converter
Output the second electric capacity of negative connection negative terminal；
The anode of the output end DC-DC converter input the second electric capacity of positive connection, output end DC-DC converter input is negative
Connect the negative terminal of the second electric capacity, the output powering load of output end DC-DC converter.
It is preferred that, the first DC-DC converter has the property of input and output isolation, while having voltage signal to compare ring
Section, for comparing output voltage and input voltage so that input voltage is as output voltage size；
It is preferred that, the first electric capacity and the second capacitance parameter are consistent；
As the equivalent scheme of above-mentioned technical proposal, first DC-DC converter and output end DC-DC converter it is another
A kind of annexation is：
The anode of input the second electric capacity of positive connection of first DC-DC converter, the negative connection of input of the first DC-DC converter
The negative terminal of second electric capacity；The anode of output the first electric capacity of positive connection of first DC-DC converter, the first DC-DC converter it is defeated
Go out the negative terminal for bearing the first electric capacity of connection；The anode of the output end DC-DC converter input the first electric capacity of positive connection, output end
The negative terminal of DC-DC converter input the first electric capacity of negative connection, the output powering load of output end DC-DC converter.
As the extension of above-mentioned technical proposal, increase the 3rd electric capacity and the 2nd DC-DC conversion on the basis of such scheme
Device, its annexation is：
The input positive pole connects the anode of the first electric capacity, and the negative terminal of the first electric capacity connects the anode of the second electric capacity, second
The negative terminal of electric capacity connects the anode of the 3rd electric capacity, the negative terminal connection input negative pole of the 3rd electric capacity；
The anode of input the first electric capacity of positive connection of first DC-DC converter, the input of the first DC-DC converter is born
Connect the negative terminal of the first electric capacity；The anode of output the 3rd electric capacity of positive connection of first DC-DC converter, the first DC-DC converter
Output the 3rd electric capacity of negative connection negative terminal；
The anode of input the second electric capacity of positive connection of second DC-DC converter, second DC-DC converter it is defeated
Enter the negative terminal for bearing the second electric capacity of connection；The anode of output the 3rd electric capacity of positive connection of second DC-DC converter, the 2nd DC-DC becomes
The negative terminal of output the 3rd electric capacity of negative connection of parallel operation；
The anode of the output end DC-DC converter input the 3rd electric capacity of positive connection, output end DC-DC converter input is negative
Connect the negative terminal of the 3rd electric capacity, the 3rd DC-DC converter output powering load.
As the equivalent scheme of above-mentioned technical proposal, another annexation is：
The anode of input the first electric capacity of positive connection of first DC-DC converter, the input of the first DC-DC converter is born
Connect the negative terminal of the first electric capacity；The anode of output the second electric capacity of positive connection of first DC-DC converter, the first DC-DC converter
Output the second electric capacity of negative connection negative terminal；
The anode of input the 3rd electric capacity of positive connection of second DC-DC converter, second DC-DC converter it is defeated
Enter the negative terminal for bearing the 3rd electric capacity of connection；The anode of output the second electric capacity of positive connection of second DC-DC converter, the 2nd DC-DC becomes
The negative terminal of output the second electric capacity of negative connection of parallel operation；
The anode of the output end DC-DC converter input the second electric capacity of positive connection, output end DC-DC converter input is negative
Connect the negative terminal of the second electric capacity, output end DC-DC converter output powering load.
As the equivalent scheme of above-mentioned technical proposal, annexation can also be：
The anode of input the second electric capacity of positive connection of first DC-DC converter, the input of the first DC-DC converter is born
Connect the negative terminal of the second electric capacity；The anode of output the first electric capacity of positive connection of first DC-DC converter, the first DC-DC converter
Output the first electric capacity of negative connection negative terminal；
The anode of input the 3rd electric capacity of positive connection of second DC-DC converter, second DC-DC converter it is defeated
Enter the negative terminal for bearing the 3rd electric capacity of connection；The anode of output the first electric capacity of positive connection of second DC-DC converter, the 2nd DC-DC becomes
The negative terminal of output the first electric capacity of negative connection of parallel operation；
The anode of the output end DC-DC converter input the first electric capacity of positive connection, output end DC-DC converter input is negative
Connect the negative terminal of the first electric capacity, output end DC-DC converter output powering load.
It is preferred that, the second DC-DC converter has the property of input and output isolation, while having voltage signal to compare ring
Section, for comparing output voltage and input voltage so that input voltage is as output voltage size；
It is preferred that, the 3rd electric capacity is consistent with the first electric capacity and the second capacitance parameter.
As further expanding for above-mentioned technical proposal, the annexation on the basis of such scheme more than can
To derive the annexation of the electric capacity being sequentially connected in series with n positive and negative terminal and n-1 DC-DC converter：
It is individual that a kind of high-voltage power circuit includes output end DC-DC converter, the electric capacity that n positive and negative terminal is sequentially connected in series and n-1
DC-DC converter, n electric capacity positive and negative terminal is sequentially connected in series to form capacitor seriesing circuit, the anode of capacitor seriesing circuit and negative
End is respectively connected to input just to be born with input, and the input of the first DC-DC converter is just born with input is connected respectively to the first electric capacity
Anode and negative terminal, the input of the second DC-DC converter just with the negative anode and negative terminal for being connected respectively to the second electric capacity of input, n-th-
The anode and negative terminal for being connected respectively to the (n-1)th electric capacity are just born in the input of 1 DC-DC converter with input；First DC-DC converter
Output just with the negative anode and negative terminal for being connected respectively to the n-th electric capacity of output, the output of the second DC-DC converter is just negative with output
The anode and negative terminal of the n-th electric capacity are connected respectively to, the output of (n-1)th DC-DC converter is just born with output is connected respectively to n-th
The anode and negative terminal of electric capacity；The input of output end DC-DC converter is just born with input to be connected respectively to the anode of the n-th electric capacity and bears
End, output end DC-DC converter output powering load.
N is the integer more than 3.
Operation principle knot and Fig. 1 summary of the present invention：
It is described to be used to transmit energy to load to the output end DC-DC converter of output power supply during stable state, due to output end
DC-DC converter is main power transmission, and the voltage of connected second electric capacity is less than the voltage of the first electric capacity, due to the
There is voltage comparing element, by the energy of the first electric capacity when input voltage is higher than output voltage inside one DC-DC converter
Amount passes to the second electric capacity, until voltage is equal；
Compared with prior art, the invention has the advantages that：
1st, the first DC-DC converter, the second DC-DC converter, n-th of DC-DC converter due to input voltage change to
Conventional voltage, is very easy in design and parts selection, or even for passing to the output end DC-DC conversion of output energy
Device design is also simplified, can be from conventional module.
2nd, the DC-DC converter design for carrying out capacitor voltage balance is also simplified, introduced compared to block coupled in seriesization
The need for each module carry out key signal detection and compare, DC-DC converter using inside feedback compared automatically
Compared with enormously simplify design.
Brief description of the drawings
Fig. 1 is first embodiment of the invention circuit diagram；
Fig. 2 is second embodiment of the invention circuit diagram；
Fig. 3 is the one of which circuit theory diagrams of the first DC-DC converter of the present invention；
Fig. 4 is third embodiment of the invention circuit diagram；
Fig. 5 is fourth embodiment of the invention circuit diagram；
Fig. 6 is fifth embodiment of the invention circuit diagram；
Fig. 7 is sixth embodiment of the invention circuit diagram.
Embodiment
First embodiment
Fig. 1 shows that the circuit diagram of first embodiment, including input positive pole Vin+, input negative pole Vin-, the first DC-DC become
Parallel operation, output end DC-DC converter, the first electric capacity C1 and the second electric capacity C2.Its specific annexation is：Positive pole Vin+ is inputted to connect
The first electric capacity C1 anode is connect, while the positive pole of the first DC-DC converter input is connected, the first electric capacity C1 negative terminal connection second
Electric capacity C2 anode, while the negative pole of the first DC-DC converter input is connected, the second electric capacity C2 negative terminal connection input negative pole
Vin-；The positive pole of first DC-DC converter output connects the second electric capacity C2 anode, the first DC-DC converter output
Negative pole connects the second electric capacity C2 negative terminal；The positive pole of output end DC-DC converter input connects the second electric capacity C2 anode, output
The negative pole of DC-DC converter input is held to connect the second electric capacity C2 negative terminal, output end DC-DC converter output powering load；
The first electric capacity C1 is referred to as electric capacity C1 for convenience, and other identical, such as the first diode D1 is referred to as diode D1.
A kind of circuit of wherein the first DC-DC converter is as shown in figure 3, annexation is：Electric capacity Cin anode connection is defeated
Enter the positive pole of power supply, its anode connects resistance R1 one end simultaneously, is also connected with the Same Name of Ends of Lp1 windings in transformer T1, electric capacity
Cin negative terminal connects the negative pole of input power；The different name end connecting valve pipe Q1 of Lp1 windings drain electrode, switching tube Q1 source electrode
Connect electric capacity Cin negative terminal；Resistance R1 other end connection resistance R2 one end, while the normal phase input end of comparator is connected,
The resistance R2 other end connects Cin negative terminal；
Transformer T1 winding Lp2 Same Name of Ends is connected to Cin negative terminal, different name end connection diode D1 anode, electric capacity
One end after Ca and R4 is in parallel is connected with diode D1 negative electrode, while connecting the negative-phase input of comparator, electric capacity Ca and R4
The other end after parallel connection is connected with electric capacity Cin negative terminal；
Inside the output end connection control IC of comparator, switching tube Q1 grid connection control IC drive end；
Switching tube Q1 drain electrode is while one end after connection diode D2 anode, electric capacity Cs and resistance Rs parallel connections connects D2
Negative electrode, the other end after electric capacity Cs and resistance Rs are in parallel connects Cin positive pole；
Transformer T1 output winding Lp3 Same Name of Ends connection electric capacity Co negative terminal, Lp3 different name end connection diode D3's
Anode, electric capacity Co anode connection diode D3 negative electrode；
Output end DC-DC converter is common electric pressure converter, output that can be by the voltage conversion of change for needed for
Voltage.Its principle is not illustrated herein.
The present embodiment operation principle is as follows：
When in the circuit of input voltage vin+be added in C1 and C2 series connection, C1 and C2 produce voltage, C1 and C2 parameters are equal.
Because the partial pressure of electric capacity is acted on, C1 and C2 respectively get a Vin half voltage.After C2 has enough voltage, in parallel with C2 is defeated
Go out to hold DC-DC converter to start working, set up output voltage, to load supplying；When output end DC-DC converter works, by
Load is constantly passed in energy, now C2 voltage necessarily declines, because C1 and C2 is connected to voltage two ends, voltage
Source supply electric capacity C1 and C2 size of current are equal, therefore necessarily cause C1 voltage to raise, the ratio in the first DC-DC converter
After the voltage differences that electric capacity C1 and C2 is detected compared with device, letter pressure difference number is supplied to control IC, IC is according to pressure difference signal for control
Size controlling switch pipe Q1, thus by the energy transmission on C1 electric capacity to C2, the final voltage for causing electric capacity C1 and C2 reaches flat
Weighing apparatus；
The voltage of comparator input in-phase end in first DC-DC converter is obtained by divider resistance R1 and R3, its voltage
For input capacitance Cin some ratio-voltage, because the input of the first DC-DC converter connects C1, therefore the voltage of in-phase end
For some ratio of C1 voltages, the voltage sampling principle of end of oppisite phase is as follows：After switching tube Q1 is turned off, originally pass through winding Lp1
Energy in storage magnetic core passes to output capacitance Co via vice-side winding Lp3, and electric capacity Co is actually connected with electric capacity C2, therefore
Its voltage is exactly electric capacity C2 voltage, due to Lp3 and Lp2 winding close-coupleds, and Lp3 induces the voltage at C2 two ends, therefore around
Group Lp2 also induces certain voltage, is not difficult to determine the voltage that Lp2 is sensed according to transformer turns ratio, from there through adjustment R1
With R3 ratio and the Lp3 and Lp2 turn ratio, comparator can be made to provide effective signal and be given to control IC, be finally reached C1 and
The C2 balance of voltage.
Advantages of the present invention is apparent：
1st, DC-DC converter is changed to conventional input voltage due to input voltage, in design and parts selection very
Easily, so as to be effectively reduced cost.
2nd, the detection of key signal is carried out to each module the need for introduced compared to block coupled in seriesization and compared, for electricity
The DC-DC converter design for holding the balance of voltage is also simplified, also can modularized production.
3rd, for the voltage of higher input, due to the DC-DC module output-parallel of capacitive balance, single electric capacity is more reduced
The power requirement of balance module.
Second embodiment
Fig. 2 is the circuit diagram of the second example, is with first embodiment difference, the input of output end DC-DC converter
Positive pole connection electric capacity C1 anode, output end DC-DC converter input negative pole connection electric capacity C1 negative terminal, while connecting electric capacity C2
Anode, electric capacity C2 negative terminal connection input negative pole；First DC-DC converter input positive pole connection electric capacity C2 anode, first
DC-DC converter input negative pole connects the negative terminal of the second electric capacity；The positive connection electric capacity C1 of output of first DC-DC converter is just
End, the output negative pole connection electric capacity C1 of the first DC-DC converter negative terminal.
Operation principle be the same as Example one, is not illustrated herein.
3rd embodiment
Fig. 4 is the circuit diagram of the 3rd example, is with first embodiment difference, adds the second DC-DC converter
With electric capacity C3, its annexation is as follows：Positive pole connection electric capacity C1 anode is inputted, while connecting the input of the first DC-DC converter
Positive pole, electric capacity C1 negative terminal connection electric capacity C2 anode, while connecting the first DC-DC converter input negative pole, electric capacity C2's is negative
End connection electric capacity C3 anode, electric capacity C3 negative terminal connection input negative pole；The input positive pole connection electric capacity of second DC-DC converter
C2 anode, the second DC-DC converter input negative pole connection electric capacity C2 negative terminal；First DC-DC converter export just, second
DC-DC converter converter output cathode connects electric capacity C3 anode respectively, and the output of the first DC-DC converter is negative, the 2nd DC-DC
Converter output negative pole connection electric capacity C3 negative terminal；Output end DC-DC converter input positive pole connection electric capacity C3 anode, output
DC-DC converter output negative pole connection electric capacity C3 negative terminal is held, converter DC3 powers for output；
Operation principle be the same as Example one is identical, and C1 and the balance of voltage and C2 and the electricity at C3 two ends at C3 two ends are realized respectively
Flatten weighing apparatus.
Fourth embodiment
Fig. 5 is the circuit diagram of the 4th example, different from 3rd embodiment connection：The input of output end DC-DC converter is just
Pole and negative pole connect electric capacity C2 anode and negative terminal respectively；The input positive pole and input negative pole of first DC-DC converter connect respectively
Electric capacity C1 anode and negative terminal is connect, the input positive pole and input negative pole of the second DC-DC converter connect electric capacity C3 anode respectively
And negative terminal, the positive pole and negative pole of the first DC-DC converter and the 2nd DC-DC outputs are respectively connecting to electric capacity C2 anode and negative
End；
Electric capacity C1, C2 and C3 are sequentially connected in series, input positive pole connection electric capacity C1 anode, input negative pole connection electric capacity C3
Negative terminal；
Operation principle is identical with 3rd embodiment, will not be repeated here.
5th embodiment
Fig. 6 is the circuit diagram of the 5th example, different from 3rd embodiment connection：The input of output end DC-DC converter is just
Pole and negative pole connect electric capacity C1 anode and negative terminal respectively；The input positive pole and input negative pole of first DC-DC converter connect respectively
Electric capacity C2 anode and negative terminal is connect, the positive pole and negative pole of the second DC-DC converter connect electric capacity C3 anode and negative terminal respectively, the
One DC-DC converter and the positive pole and negative pole of the 2nd DC-DC outputs are connected to electric capacity C1 anode and negative terminal；
Electric capacity C1, C2 and C3 are sequentially connected in series, input positive pole connection electric capacity C1 anode, input negative pole connection electric capacity C3
Negative terminal.
The same 3rd embodiment of operation principle, will not be repeated here.
Sixth embodiment
Fig. 7 is sixth embodiment circuit diagram, is further expanded as to the present invention, a kind of high pressure described in the present embodiment
Power circuit includes output end DC-DC converter, the electric capacity that n positive and negative terminal is sequentially connected in series and n-1 DC-DC converter, n electricity
Hold positive and negative terminal to be sequentially connected in series to form capacitor seriesing circuit, the anode and negative terminal of capacitor seriesing circuit be respectively connected to input just and
Input is negative, and the anode and negative terminal that are connected respectively to the first electric capacity, the 2nd DC- are just born in the input of the first DC-DC converter with input
The input of DC converters just with the negative anode and negative terminal for being connected respectively to the second electric capacity of input, (n-1)th DC-DC converter it is defeated
Enter the anode and negative terminal just born with input and be connected respectively to the (n-1)th electric capacity；The output of first DC-DC converter is just born with output to divide
The anode and negative terminal of the n-th electric capacity are not connected to, and the output of the second DC-DC converter is just born with output is connected respectively to the n-th electric capacity
Anode and negative terminal, the output of (n-1)th DC-DC converter just with the negative anode and negative terminal for being connected respectively to the n-th electric capacity of output；
The anode and negative terminal for being connected respectively to the n-th electric capacity are just born in the input of output end DC-DC converter with input, and output end DC-DC becomes
Parallel operation exports powering load.
N is the integer more than 3.
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
The limitation of the present invention, for those skilled in the art, without departing from the spirit and scope of the present invention, also
Some improvements and modifications can be made, capacitive balance converter is such as changed to normal shock mode or other modes；These are improved
Protection scope of the present invention is also should be regarded as with retouching, is no longer repeated here with embodiment, protection scope of the present invention should be with power
Profit requires that limited range is defined.
Claims (8)
1. a kind of high-voltage power circuit, it is characterised in that：Including input positive pole, input negative pole, the first electric capacity, the second electric capacity, the
One DC-DC converter, output end DC-DC converter；
The input positive pole connects the anode of the first electric capacity, and the negative terminal of the first electric capacity connects the anode of the second electric capacity, the second electric capacity
Negative terminal connection input negative pole；
The anode of input the first electric capacity of positive connection of first DC-DC converter, the negative connection of input of the first DC-DC converter
The negative terminal of first electric capacity, the anode of output the second electric capacity of positive connection of the first DC-DC converter, the first DC-DC converter it is defeated
Go out the negative terminal for bearing the second electric capacity of connection；
The anode of the output end DC-DC converter input the second electric capacity of positive connection, the negative connection of output end DC-DC converter input
The negative terminal of second electric capacity, the output powering load of output end DC-DC converter.
2. a kind of high-voltage power circuit according to claim 1, it is characterised in that：The input of first DC-DC converter is just
Connect the anode of the second electric capacity, the negative terminal of input the second electric capacity of negative connection of the first DC-DC converter；First DC-DC converter
Output the first electric capacity of positive connection anode, the negative terminal of output the first electric capacity of negative connection of the first DC-DC converter；The output
The anode of DC-DC converter input the first electric capacity of positive connection is held, output end DC-DC converter inputs the negative of the first electric capacity of negative connection
End, the output powering load of output end DC-DC converter.
3. a kind of high-voltage power circuit according to claim 1 or 2, it is characterised in that：First DC-DC converter has defeated
Enter and export the property of isolation, while there is voltage signal comparing element, for comparing output voltage and input voltage so that defeated
Enter voltage as output voltage size；
First electric capacity and the second capacitance parameter are identical.
4. a kind of high-voltage power circuit according to claim 3, it is characterised in that：Also include the 3rd electric capacity and the 2nd DC-
DC converters, the input positive pole connects the anode of the first electric capacity, and the negative terminal of the first electric capacity connects the anode of the second electric capacity, second
The negative terminal of electric capacity connects the anode of the 3rd electric capacity, the negative terminal connection input negative pole of the 3rd electric capacity；
The anode of input the first electric capacity of positive connection of first DC-DC converter, the negative connection of input of the first DC-DC converter
The negative terminal of first electric capacity；The anode of output the 3rd electric capacity of positive connection of first DC-DC converter, the first DC-DC converter it is defeated
Go out the negative terminal for bearing the 3rd electric capacity of connection；
The anode of input the second electric capacity of positive connection of second DC-DC converter, the input of second DC-DC converter is born
Connect the negative terminal of the second electric capacity；The anode of output the 3rd electric capacity of positive connection of second DC-DC converter, the second DC-DC converter
Output the 3rd electric capacity of negative connection negative terminal；
The anode of the output end DC-DC converter input the 3rd electric capacity of positive connection, the negative connection of output end DC-DC converter input
The negative terminal of 3rd electric capacity, the 3rd DC-DC converter output powering load.
5. a kind of high-voltage power circuit according to claim 4, it is characterised in that：
The anode of input the first electric capacity of positive connection of first DC-DC converter, the negative connection of input of the first DC-DC converter
The negative terminal of first electric capacity；The anode of output the second electric capacity of positive connection of first DC-DC converter, the first DC-DC converter it is defeated
Go out the negative terminal for bearing the second electric capacity of connection；
The anode of input the 3rd electric capacity of positive connection of second DC-DC converter, the input of second DC-DC converter is born
Connect the negative terminal of the 3rd electric capacity；The anode of output the second electric capacity of positive connection of second DC-DC converter, the second DC-DC converter
Output the second electric capacity of negative connection negative terminal；
The anode of the output end DC-DC converter input the second electric capacity of positive connection, the negative connection of output end DC-DC converter input
The negative terminal of second electric capacity, output end DC-DC converter output powering load.
6. a kind of high-voltage power circuit according to claim 5, it is characterised in that：
The anode of input the second electric capacity of positive connection of first DC-DC converter, the negative connection of input of the first DC-DC converter
The negative terminal of second electric capacity；The anode of output the first electric capacity of positive connection of first DC-DC converter, the first DC-DC converter it is defeated
Go out the negative terminal for bearing the first electric capacity of connection；
The anode of input the 3rd electric capacity of positive connection of second DC-DC converter, the input of second DC-DC converter is born
Connect the negative terminal of the 3rd electric capacity；The anode of output the first electric capacity of positive connection of second DC-DC converter, the second DC-DC converter
Output the first electric capacity of negative connection negative terminal；
The anode of the output end DC-DC converter input the first electric capacity of positive connection, the negative connection of output end DC-DC converter input
The negative terminal of first electric capacity, output end DC-DC converter output powering load.
7. a kind of high-voltage power circuit according to claim 4 or 5 or 6, it is characterised in that：Second DC-DC converter has
There is the property of input and output isolation, while having voltage signal comparing element, for comparing output voltage and input voltage, make
Input voltage is obtained as output voltage size；
3rd electric capacity is identical with the first electric capacity and the second capacitance parameter.
8. a kind of high-voltage power circuit according to claim 7, it is characterised in that：It is sequentially connected in series including n positive and negative terminal
Electric capacity and n-1 DC-DC converter, n electric capacity positive and negative terminal are sequentially connected in series to form capacitor seriesing circuit, capacitor seriesing circuit
Anode and negative terminal be respectively connected to input positive pole and input negative pole, the input of the first DC-DC converter just with input is negative connects respectively
The anode and negative terminal of the first electric capacity are connected to, the input of the second DC-DC converter is just born with input is connected respectively to the second electric capacity
Anode and negative terminal, the input of (n-1)th DC-DC converter is just born with input to be connected respectively to the anode of (n-1)th electric capacity and bears
End；The anode and negative terminal for being connected respectively to the n-th electric capacity, the 2nd DC-DC conversion are just born in the output of first DC-DC converter with output
The output of device just with the negative anode and negative terminal for being connected respectively to the n-th electric capacity of output, the output of (n-1)th DC-DC converter just and
The negative anode and negative terminal for being connected respectively to the n-th electric capacity of output；The input of output end DC-DC converter is just born with input and connected respectively
To the anode and negative terminal of the n-th electric capacity, output end DC-DC converter output powering load；
N is the integer more than 3.
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| CN201710610406.5A CN107276393B (en) | 2017-07-25 | 2017-07-25 | High-voltage power supply circuit |
| PCT/CN2018/088026 WO2019019784A1 (en) | 2017-07-25 | 2018-05-23 | High-voltage power supply circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710610406.5A CN107276393B (en) | 2017-07-25 | 2017-07-25 | High-voltage power supply circuit |
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| CN107276393A true CN107276393A (en) | 2017-10-20 |
| CN107276393B CN107276393B (en) | 2023-10-20 |
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| CN201710610406.5A Active CN107276393B (en) | 2017-07-25 | 2017-07-25 | High-voltage power supply circuit |
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| WO (1) | WO2019019784A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019019784A1 (en) * | 2017-07-25 | 2019-01-31 | 广州金升阳科技有限公司 | High-voltage power supply circuit |
| CN114285275A (en) * | 2021-12-27 | 2022-04-05 | 阳光电源股份有限公司 | Power conversion system and power supply system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117157867A (en) * | 2021-05-13 | 2023-12-01 | 华为数字能源技术有限公司 | Resonant switched capacitor converter and power supply system |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107276393B (en) | 2023-10-20 |
| WO2019019784A1 (en) | 2019-01-31 |
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