CN203491895U - High voltage step-up ratio double-switch direct current converter - Google Patents
High voltage step-up ratio double-switch direct current converter Download PDFInfo
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- CN203491895U CN203491895U CN201320601267.7U CN201320601267U CN203491895U CN 203491895 U CN203491895 U CN 203491895U CN 201320601267 U CN201320601267 U CN 201320601267U CN 203491895 U CN203491895 U CN 203491895U
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- 238000004804 winding Methods 0.000 claims abstract description 98
- 230000008878 coupling Effects 0.000 claims abstract description 67
- 238000010168 coupling process Methods 0.000 claims abstract description 67
- 238000005859 coupling reaction Methods 0.000 claims abstract description 67
- 238000004146 energy storage Methods 0.000 claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 239000000446 fuel Substances 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 abstract 3
- 238000010248 power generation Methods 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The utility model relates to a high voltage step-up ratio double-switch direct current converter. The high voltage step-up ratio double-switch direct current converter comprises two controllable power switch tubes, two coupling inductors respectively provided with two windings, four unidirectional rectifier diodes, an output diode, a clamping capacitor, two intermediate energy storage capacitors, and an output filtering capacitor. The voltage across the two ends of the output filtering capacitor is employed as the output voltage, and the two ends of the output filtering capacitor are connected with loads. According to the utility model, a high gain double voltage can be achieved via the two coupling inductors respectively provided with the two windings in the high voltage step-up ratio double-switch direct current converter, and the peak voltage stress of the power switch tubes and the diodes can be reduced. The high voltage step-up ratio double-switch direct current converter is characterized in that switch cutoff voltage spikes due to leakage inductance can be absorbed by a clamping circuit composed of the unidirectional rectifier diodes and the clamping capacitor, and input current ripples can be effectively reduced via an interleaving parallel control manner. The high voltage step-up ratio double-switch direct current converter is applicable to a standby energy system and renewable energy power generation systems such as photovoltaic batteries and fuel batteries in the future, is of high practical value, and has a good popularization prospect.
Description
Technical field
The utility model relates to the DC-DC converter of field of power electronics, is a kind of high step-up ratio biswitch DC converter specifically.
Background technology
Along with petering out of the disposable energy in the whole world, the mankind start actively to seek the development and utilization of regenerative resource, therefore adopt the clean reproducible energies such as solar energy and fuel cell to generate electricity by way of merging two or more grid systems, more and more get more and more people's extensive concerning, the research of its related application technology is also extremely important.And in renewable energy system, the voltage that sends due to many regenerative resources is lower and common fluctuation is larger, and grid-connected system required be the DC bus that voltage is higher.For the voltage of photovoltaic or fuel cell array being risen to the required DC bus-bar voltage of combining inverter, conventionally adopt BOOST or two-phase crisscross parallel BOOST circuit as front stage converter, the no-load voltage ratio of boosting of these two kinds of Structural Transformation devices equates, when input voltage is lower, in order to reach higher output voltage, its switch conduction duty ratio will can reduce the efficiency of converter so on the one hand close to 1, and Simultaneous Switching frequency is also difficult for further improving.Therefore the DC converter of studying novel high-performance and having a higher no-load voltage ratio of boosting meets the needs of rear class combining inverter, has important theoretical significance and application value.
Summary of the invention
The purpose of this utility model is to provide a kind of low input current ripple, high-gain, high efficiency and control method and is easy to the high step-up ratio biswitch DC converter realizing.
In order to achieve the above object, technical solution of the present utility model is, high step-up ratio biswitch DC converter.As shown in Figure 1, comprise two controlled power switch pipes
q 1,
q 2, one with two windings
n p1
,
n s1
coupling inductance, one with two windings
n p2
,
n s2
coupling inductance, four one-way commutation diodes
d 1,
d 2,
d 3,
d 4, an output diode
d o , a clamping capacitance
c 1, two intermediate energy storage electric capacity
c 2,
c 3, an output filter capacitor
c o , output filter capacitor (
c o ) voltage at two ends is output voltage, output filter capacitor (
c o ) two termination loads.
Shown in figure 1, the concrete connected mode of the above circuit is as follows: a winding of the first coupling inductance
n p1
same Name of Ends and a winding of the second coupling inductance
n p2
same Name of Ends and direct-current input power supplying
v in positive pole be connected, a winding of the first coupling inductance
n p1
the other end and power switch pipe
q 1drain electrode be connected, a winding of the second coupling inductance
n p2
the other end and power switch pipe
q 2drain electrode be connected, power switch pipe
q 1source electrode and power switch pipe
q 2source electrode and direct-current input power supplying
v in negative pole be connected, one-way commutation diode
d 1anode and power switch pipe
q 1drain electrode and intermediate energy storage electric capacity
c 2negative pole be connected, one-way commutation diode
d 2anode and power switch pipe
q 2drain electrode be connected, one-way commutation diode
d 1,
d 2negative electrode with and one-way commutation diode
d 3anode and clamping capacitance
c 1positive pole be connected, one-way commutation diode
d 3negative electrode and another winding of the first coupling inductance
n s1
same Name of Ends and one-way commutation diode
d 4anode be connected, another winding of the second coupling inductance
n s2
same Name of Ends and intermediate energy storage electric capacity
c 3negative pole be connected, another winding of the first coupling inductance
n s1
the other end and another winding of the second coupling inductance
n s2
the other end be connected, intermediate energy storage electric capacity
c 3positive pole and one-way commutation diode
d 4negative electrode and output diode
d o anode be connected, output diode
d o negative electrode and output filter capacitor
c o one end be connected, output filter capacitor
c o the other end and clamping capacitance
c 1negative pole and direct-current input power supplying
v in negative pole be connected.
During high step-up ratio biswitch DC converter work of the present utility model, utilize two coupling inductances to improve step-up ratio and reduced the voltage stress of power switch pipe; Utilize the leakage inductance of coupling inductance to realize first controlled power switch pipe (Q
1) with second controlled power switch pipe (Q
2) zero current turning-on, utilize the leakage inductance of coupling inductance also to realize the soft shutoff of output diode simultaneously; Utilize first one-way commutation diode (D
1), second one-way commutation diode (D
2) and clamping capacitance (C
1) absorb the energy of leakage inductance, make first controlled power switch pipe (Q
1) with second controlled power switch pipe (Q
2) due to voltage spikes reduces while turn-offing, and absorb leakage inductance energy and pass to load, reduce the wastage; Utilize crisscross parallel to control the power grade that has reduced the ripple of input current and improved system.
accompanying drawing explanation
Fig. 1 is the topology diagram of a kind of high step-up ratio biswitch DC converter of the present utility model.
embodiment
High step-up ratio biswitch DC converter of the present utility model.As shown in Figure 1, comprise two controlled power switch pipe (Q
1, Q
2), one with two winding (N
p1, N
s1) coupling inductance, one with two winding (N
p2, N
s2) coupling inductance, four one-way commutation diode (D
1, D
2, D
3, D
4), an output diode (D
o), a clamping capacitance (C
1), two intermediate energy storage electric capacity (C
2, C
3), an output filter capacitor (C
o).Concrete connected mode is as follows: with two winding (N
p1, N
s1) a winding (N of coupling inductance
p1) Same Name of Ends with two winding (N
p2, N
s2) a winding (N of coupling inductance
p2) Same Name of Ends and direct-current input power supplying (V
in) positive pole be connected, with two winding (N
p1, N
s1) a winding (N of coupling inductance
p1) the other end and first controlled power switch pipe (Q
1) drain electrode be connected, with two winding (N
p2, N
s2) a winding (N of coupling inductance
p2) the other end and second controlled power switch pipe (Q
2) drain electrode be connected, the power switch pipe (Q that first is controlled
1) source electrode and second controlled power switch pipe power switch pipe (Q
2) source electrode and clamping capacitance (C
1) negative pole and direct-current input power supplying (V
in) negative pole be connected, first one-way commutation diode (D
1) anode and first controlled power switch pipe (Q
1) drain electrode and first intermediate energy storage electric capacity (C
2) negative pole be connected, second one-way commutation diode (D
2) anode and second controlled power switch pipe (Q
2) drain electrode be connected, first one-way commutation diode (D
1) and second one-way commutation diode (D
2) negative electrode and the 3rd one-way commutation diode (D
3) anode and clamping capacitance (C
1) positive pole be connected, the 3rd one-way commutation diode (D
3) negative electrode with two winding (N
p1, N
s1) another winding (N of coupling inductance
s1) Same Name of Ends and the 4th one-way commutation diode (D
4) anode be connected, with two winding (N
p2, N
s2) another winding (N of coupling inductance
s2) Same Name of Ends and second intermediate energy storage electric capacity (C
3) negative pole be connected, with two winding (N
p1, N
s1) another winding (N of coupling inductance
s1) the other end with two winding (N
p2, N
s2) another winding (N of coupling inductance
s2) the other end be connected, second intermediate energy storage electric capacity (C
3) positive pole and the 4th one-way commutation diode (D
4) negative electrode and output diode (D
o) anode be connected, output diode (D
o) negative electrode and output filter capacitor (C
o) one end be connected, output filter capacitor (C
o) other end and direct-current input power supplying (V
in) negative pole be connected.
High step-up ratio biswitch DC converter of the present utility model, adopts staggered 180 ° of the control signal of two power switch pipes, and duty ratio is greater than 0.5 control mode, has four kinds of steady operation states, and labor is as follows:
Power switch pipe (the Q that first is controlled
1) with second controlled power switch pipe (Q
2) mode of conducting simultaneously, clamping capacitance (C
1) electric discharge mode, first intermediate energy storage electric capacity (C
2) charging mode, second intermediate energy storage electric capacity (C
3) suspend.Under this mode, first one-way commutation diode (D
1), second one-way commutation diode (D
2), the 4th one-way commutation diode (D
4) and output diode (D
o) turn-off the 3rd one-way commutation diode (D
3) conducting.Wherein, DC source input source (V
in), with two winding (N
p1, N
s1) a winding (N of coupling inductance
p1), first controlled power switch pipe (Q
1) formation loop, DC source input source (V
in) to two winding (N
p1, N
s1) coupling inductance charging, with two winding (N
p1, N
s1) winding (N of coupling inductance
p1) on linear the increasing of electric current; DC source input source (V
in), with two winding (N
p2, N
s2) a winding (N of coupling inductance
p2), second controlled power switch pipe (Q
2) formation loop, DC source input source (V
in) to two winding (N
p2, N
s2) coupling inductance charging, with two winding (N
p2, N
s2) winding (N of coupling inductance
p2) on linear the increasing of electric current; Clamping capacitance (C
1), second one-way commutation diode (D
2), first intermediate energy storage electric capacity (C
2) and first controlled power switch pipe (Q
1) formation loop, clamping capacitance (C
1) in discharge condition, first intermediate energy storage electric capacity (C
2) in charged state.
Power switch pipe (the Q that first is controlled
1) conducting and second controlled power switch pipe (Q
2) shutoff mode, clamping capacitance (C
1) charging mode, first intermediate energy storage electric capacity (C
2), second intermediate energy storage electric capacity (C
3) charging mode.Under this mode, first one-way commutation diode (D
1) and output diode (D
o) turn-off second one-way commutation diode (D
2), the 3rd one-way commutation diode (D
3) and the 4th one-way commutation diode (D
4) conducting.Wherein, DC source input source (V
in), with two winding (N
p1, N
s1) a winding (N of coupling inductance
p1), first controlled power switch pipe (Q
1) formation loop, DC source input source (V
in) to two winding (N
p1, N
s1) coupling inductance charging, with two winding (N
p1, N
s1) winding (N of coupling inductance
p1) on electric current continue linear increasing; DC source input source (V
in) pass through with two winding (N
p2, N
s2) a winding (N of coupling inductance
p2) to two winding (N
p2, N
s2) another winding (N of coupling inductance
s2) transferring energy, with two winding (N
p2, N
s2) winding (N of coupling inductance
p2) on linear minimizing of electric current, DC source input source (V
in), with two winding (N
p2, N
s2) winding (N of coupling inductance
p2), second one-way commutation diode (D
2) and clamping capacitance (C
1) formation loop, clamping capacitance (C
1) in charged state; DC source input source (V
in), with two winding (N
p2, N
s2) winding (N of coupling inductance
p2), second one-way commutation diode (D
2), the 3rd one-way commutation diode (D
3), first intermediate energy storage electric capacity (C
2) and first controlled power switch pipe (Q
1) formation loop, first intermediate energy storage electric capacity (C
2) in charged state; With two winding (N
p1, N
s1) another winding (N of coupling inductance
s1), with two winding (N
p2, N
s2) another winding (N of coupling inductance
s2), the 4th one-way commutation diode (D
4) and second intermediate energy storage electric capacity (C
3) form loop, i.e. voltage multiplication unit, second intermediate energy storage electric capacity (C
3) in charged state.
Power switch pipe (the Q that first is controlled
1) with second controlled power switch pipe (Q
2) mode of conducting simultaneously, clamping capacitance (C
1) suspension mode, first intermediate energy storage electric capacity (C
2) and second intermediate energy storage electric capacity (C
3) suspension mode.Under this mode, first one-way commutation diode (D
1), second one-way commutation diode (D
2), the 3rd one-way commutation diode (D
3), the 4th one-way commutation diode (D
4) and output diode (D
o) all turn-off.Wherein, DC source input source (V
in), with two winding (N
p1, N
s1) a winding (N of coupling inductance
p1), first controlled power switch pipe (Q
1) formation loop, DC source input source (V
in) to two winding (N
p1, N
s1) coupling inductance charging, with two winding (N
p1, N
s1) winding (N of coupling inductance
p1) on linear the increasing of electric current; DC source input source (V
in), with two winding (N
p2, N
s2) a winding (N of coupling inductance
p2), second controlled power switch pipe (Q
2) formation loop, DC source input source (V
in) to two winding (N
p2, N
s2) coupling inductance charging, with two winding (N
p2, N
s2) winding (N of coupling inductance
p2) on linear the increasing of electric current.
Power switch pipe (the Q that first is controlled
1) turn-off the power switch pipe (Q controlled with second
2) conducting mode, clamping capacitance (C
1) charging mode, first intermediate energy storage electric capacity (C
2) and second intermediate energy storage electric capacity (C
3) electric discharge mode.Under this mode, second one-way commutation diode (D
2), the 3rd one-way commutation diode (D
3) and the 4th one-way commutation diode (D
4) turn-off first one-way commutation diode (D
1) and output diode (D
o) conducting.Wherein, DC source input source (V
in), with two winding (N
p2, N
s2) a winding (N of coupling inductance
p2), second controlled power switch pipe (Q
2) formation loop, DC source input source (V
in) to two winding (N
p2, N
s2) coupling inductance charging, with two winding (N
p2, N
s2) winding (N of coupling inductance
p2) on electric current continue linear increasing; DC source input source (V
in) pass through with two winding (N
p1, N
s1) winding (N of coupling inductance
p1) to two winding (N
p1, N
s1) another winding (N of coupling inductance
s1) transferring energy, with two winding (N
p1, N
s1) winding (N of coupling inductance
p1) on linear minimizing of electric current, DC source input source (V
in), with two winding (N
p1, N
s1) winding (N of coupling inductance
p1), first one-way commutation diode (D
1), clamping capacitance (C
1) formation loop, clamping capacitance (C
1) in charged state; DC source input source (V
in), with two winding (N
p1, N
s1) winding (N of coupling inductance
p1), first intermediate energy storage electric capacity (C
2), second intermediate energy storage electric capacity (C
3), with two winding (N
p1, N
s1) another winding (N of coupling inductance
s1), with two winding (N
p2, N
s2) another winding (N of coupling inductance
s2), output diode (D
o) and output load formation loop, first intermediate energy storage electric capacity (C
2) and second intermediate energy storage electric capacity (C
3) in discharge condition.
High step-up ratio biswitch DC converter of the present utility model, under these four kinds of mode, completes the conversion of energy.This converter has height boost no-load voltage ratio, low switch voltage stress, and simple in structure, controls technical characterstic easily.
Claims (1)
1. a high step-up ratio biswitch DC converter, is characterized in that: comprise two controlled power switch pipes
q 1,
q 2, one with two windings
n p1
,
n s1
coupling inductance, one with two windings
n p2
,
n s2
coupling inductance, four one-way commutation diodes
d 1,
d 2,
d 3,
d 4, an output diode
d o , a clamping capacitance
c 1, two intermediate energy storage electric capacity
c 2,
c 3, an output filter capacitor
c o , output filter capacitor
c o the voltage at two ends is output voltage, output filter capacitor
c o two termination loads, concrete connected mode is as follows: a winding of the first coupling inductance
n p1
same Name of Ends and a winding of the second coupling inductance
n p2
same Name of Ends and direct-current input power supplying
v in positive pole be connected, a winding of the first coupling inductance
n p1
the other end and power switch pipe
q 1drain electrode be connected, a winding of the second coupling inductance
n p2
the other end and power switch pipe
q 2drain electrode be connected, power switch pipe
q 1source electrode and power switch pipe
q 2source electrode and direct-current input power supplying
v in negative pole be connected, one-way commutation diode
d 1anode and power switch pipe
q 1drain electrode and intermediate energy storage electric capacity
c 2negative pole be connected, one-way commutation diode
d 2anode and power switch pipe
q 2drain electrode be connected, one-way commutation diode
d 1,
d 2negative electrode with and one-way commutation diode
d 3anode and clamping capacitance
c 1positive pole be connected, one-way commutation diode
d 3negative electrode and another winding of the first coupling inductance
n s1
same Name of Ends and one-way commutation diode
d 4anode be connected, another winding of the second coupling inductance
n s2
same Name of Ends and intermediate energy storage electric capacity
c 3negative pole be connected, another winding of the first coupling inductance
n s1
the other end and another winding of the second coupling inductance
n s2
the other end be connected, intermediate energy storage electric capacity
c 3positive pole and one-way commutation diode
d 4negative electrode and output diode
d o anode be connected, output diode
d o negative electrode and output filter capacitor
c o one end be connected, output filter capacitor
c o the other end and clamping capacitance
c 1negative pole and direct-current input power supplying
v in negative pole be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320601267.7U CN203491895U (en) | 2013-09-27 | 2013-09-27 | High voltage step-up ratio double-switch direct current converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320601267.7U CN203491895U (en) | 2013-09-27 | 2013-09-27 | High voltage step-up ratio double-switch direct current converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203491895U true CN203491895U (en) | 2014-03-19 |
Family
ID=50262695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320601267.7U Expired - Fee Related CN203491895U (en) | 2013-09-27 | 2013-09-27 | High voltage step-up ratio double-switch direct current converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203491895U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475211A (en) * | 2013-09-29 | 2013-12-25 | 王琳 | Coupling inductor and voltage doubling circuit combined set-up converter |
| CN107612322A (en) * | 2017-10-24 | 2018-01-19 | 哈尔滨工业大学深圳研究生院 | A kind of magnetic integrates high step-up ratio Switching Power Supply |
| CN107769574A (en) * | 2017-11-22 | 2018-03-06 | 西安理工大学 | A kind of high quasi- Switching capacitors that boost of isolated form |
| CN108322044A (en) * | 2018-01-26 | 2018-07-24 | 中国矿业大学 | One kind being based on the magnetic-coupled Boost circuit of flyback |
| CN108768169A (en) * | 2018-05-04 | 2018-11-06 | 南通科技职业学院 | A kind of fuel cell double coupling alternating expression booster converters and its control method |
| CN109450260A (en) * | 2018-12-19 | 2019-03-08 | 电子科技大学 | A kind of capacitance series formula crisscross parallel circuit of reversed excitation |
| CN109818495A (en) * | 2019-03-14 | 2019-05-28 | 阳光电源股份有限公司 | Group string inverter and its boost chopper control method |
| CN110212747A (en) * | 2019-05-29 | 2019-09-06 | 电子科技大学 | It is a kind of that control method is started without overshoot Boost based on dynamic peak value electric current |
| CN110943617A (en) * | 2019-12-11 | 2020-03-31 | 中国船舶工业系统工程研究院 | Circuit topological structure of double-switch type DC/DC converter |
| CN111181392A (en) * | 2018-11-09 | 2020-05-19 | 天津大学青岛海洋技术研究院 | Wide-voltage-range input type non-isolated double-switch wide-gain boost direct current converter |
| CN111865076A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | DC step-down circuit applied to power supply of relay protection devices in substations |
-
2013
- 2013-09-27 CN CN201320601267.7U patent/CN203491895U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475211A (en) * | 2013-09-29 | 2013-12-25 | 王琳 | Coupling inductor and voltage doubling circuit combined set-up converter |
| CN107612322A (en) * | 2017-10-24 | 2018-01-19 | 哈尔滨工业大学深圳研究生院 | A kind of magnetic integrates high step-up ratio Switching Power Supply |
| CN107769574A (en) * | 2017-11-22 | 2018-03-06 | 西安理工大学 | A kind of high quasi- Switching capacitors that boost of isolated form |
| CN108322044B (en) * | 2018-01-26 | 2019-11-08 | 中国矿业大学 | A Boost circuit based on anti-excitation coupling |
| CN108322044A (en) * | 2018-01-26 | 2018-07-24 | 中国矿业大学 | One kind being based on the magnetic-coupled Boost circuit of flyback |
| CN108768169A (en) * | 2018-05-04 | 2018-11-06 | 南通科技职业学院 | A kind of fuel cell double coupling alternating expression booster converters and its control method |
| CN108768169B (en) * | 2018-05-04 | 2023-08-25 | 南通科技职业学院 | Dual-coupling staggered boost converter for fuel cell and control method thereof |
| CN111181392A (en) * | 2018-11-09 | 2020-05-19 | 天津大学青岛海洋技术研究院 | Wide-voltage-range input type non-isolated double-switch wide-gain boost direct current converter |
| CN111181392B (en) * | 2018-11-09 | 2023-06-30 | 天津大学青岛海洋技术研究院 | Wide-voltage-range input type non-isolated double-switch wide-gain boost direct-current converter |
| CN109450260A (en) * | 2018-12-19 | 2019-03-08 | 电子科技大学 | A kind of capacitance series formula crisscross parallel circuit of reversed excitation |
| CN109818495A (en) * | 2019-03-14 | 2019-05-28 | 阳光电源股份有限公司 | Group string inverter and its boost chopper control method |
| CN109818495B (en) * | 2019-03-14 | 2020-05-22 | 阳光电源股份有限公司 | String inverter and boost chopper circuit control method thereof |
| CN110212747A (en) * | 2019-05-29 | 2019-09-06 | 电子科技大学 | It is a kind of that control method is started without overshoot Boost based on dynamic peak value electric current |
| CN110943617A (en) * | 2019-12-11 | 2020-03-31 | 中国船舶工业系统工程研究院 | Circuit topological structure of double-switch type DC/DC converter |
| CN110943617B (en) * | 2019-12-11 | 2022-04-19 | 中国船舶工业系统工程研究院 | Circuit topological structure of double-switch type DC/DC converter |
| CN111865076A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | DC step-down circuit applied to power supply of relay protection devices in substations |
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