CN112260536A - High-specific-power Buck circuit applied to satellite power supply - Google Patents
High-specific-power Buck circuit applied to satellite power supply Download PDFInfo
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- CN112260536A CN112260536A CN202010986134.0A CN202010986134A CN112260536A CN 112260536 A CN112260536 A CN 112260536A CN 202010986134 A CN202010986134 A CN 202010986134A CN 112260536 A CN112260536 A CN 112260536A
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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
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- 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
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
- H02M3/1586—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The utility model provides a be applied to high specific power Buck circuit of satellite power supply, belongs to space power supply technical field, the circuit includes: the input end is used for inputting a first voltage to the first Buck circuit and the second Buck circuit; the first Buck circuit is used for receiving the first voltage and outputting a second voltage to an output end in common with the second Buck circuit; the first end of the first Buck circuit is connected with the input end; the second Buck circuit is used for receiving the first voltage and outputting the second voltage to the output end together with the first Buck circuit; the first end of the second Buck circuit is connected with the input end; an output terminal for receiving control of the first Buck circuit and the second Buck circuit and outputting the second voltage; the output end is respectively connected with the second ends of the first Buck circuit and the second Buck circuit. The high specific power Buck circuit applied to the satellite power supply has the characteristics of high specific power and low output current ripple, and is simple in topological structure and high in reliability.
Description
Technical Field
The invention belongs to the technical field of space power supplies, and particularly relates to a high-specific-power Buck circuit applied to a satellite power supply.
Background
A space power supply system is one of key subsystems for ensuring stable and reliable operation of a spacecraft, a DC-DC circuit is a power circuit mainly adopted by the existing space power supply system, and the existing space power supply power circuit mostly adopts topologies such as Buck, Boost-Buck and the like. These topologies are simple and reliable, but have the phenomena of low specific power and large output current and voltage ripples. With the rapid development of aerospace industry in China, the demand of a new generation of satellite power supply system on a power conversion circuit with high specific power and high output voltage and current quality is increasingly strong.
The Buck circuit is one of the most basic DC-DC conversion structures. With the continuous improvement of the power grade of a space power supply system, the requirement on devices is higher and higher, the current of a switching tube can be reduced to a fraction of the output current by adopting a mode of parallel operation of converters, and the power grade can be improved under the condition of not improving the stress of the devices. By adopting a staggered parallel connection mode, output current ripples can be reduced, switching loss can be reduced, and the efficiency of the conversion circuit can be improved. It is therefore considered to provide a high specific power circuit for satellite power supply based on a Buck circuit.
Disclosure of Invention
In order to solve the above problems, the present invention provides a high specific power Buck circuit applied to a satellite power supply, including:
the input end is used for inputting a first voltage to the first Buck circuit and the second Buck circuit;
the first Buck circuit is used for receiving the first voltage and outputting a second voltage to an output end in common with the second Buck circuit; the first end of the first Buck circuit is connected with the input end;
the second Buck circuit is used for receiving the first voltage and outputting the second voltage to the output end together with the first Buck circuit; the first end of the second Buck circuit is connected with the input end;
an output terminal for receiving control of the first Buck circuit and the second Buck circuit and outputting the second voltage; the output end is respectively connected with the second ends of the first Buck circuit and the second Buck circuit.
Preferably, the input terminal includes: power supply UdcSaid power supply UdcThe positive pole of the first Buck circuit is connected with the first end of the second Buck circuit, and the power supply UdcThe negative electrode of (2) is grounded.
Preferably, the first Buck circuit includes: diode Q1Diode D1Triode S1Inductor L1And a capacitor C1Wherein the diode Q1Is connected with a power supply U in the input enddcRespectively connected with the anode and the cathode of the diode D1And the inductance L1The first terminal of the diode D1The anode of the triode S is grounded, and the triode S1Collector of and said diode Q1Of said triode S1Respectively with the emitter and base of the diode Q1The anode of the inductor L1The second end of the capacitor is connected with the anode of the output end, and the capacitor C1Is connected to the positive pole of the output terminal and the second terminal is grounded.
Preferably, the second Buck circuit includes: diode Q2Diode D2Triode S2And an inductance L2Wherein the diode Q2Is connected with a power supply U in the input enddcRespectively connected with the anode and the cathode of the diode D2And the inductance L2The first terminal of the diode D2The anode of the triode S is grounded, and the triode S2Collector of and said diode Q2Of said triode S2Respectively with the emitter and base of the diode Q2The anode of the inductor L2The second end of the second switch is connected with the anode of the output end.
The high specific power Buck circuit applied to the satellite power supply is suitable for deep hole detection, electric propulsion project platforms of low-orbit high-power satellites and other aircraft projects with high specific power and low output current ripple requirements; compared with the prior art, the high specific power Buck circuit applied to the satellite power supply has the characteristics of high specific power and low output current ripple, and is simple in topological structure and high in reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic circuit diagram of a high specific power Buck circuit applied to a satellite power supply according to the present invention;
FIG. 2 is a schematic diagram of an analysis of an operating mode of a high specific power Buck circuit applied to a satellite power supply according to the present invention;
fig. 3 is a schematic circuit modulation diagram of a high specific power Buck circuit applied to a satellite power supply according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Referring to fig. 1 to 3, in the embodiments of the present application, the present invention provides a high specific power Buck circuit applied to a satellite power supply, including: the input end, the first Buck circuit, the second Buck circuit and the output end, and the detailed description of each part is described below.
Referring to fig. 1-3, in the embodiment of the present application, the present invention provides a high specific power Buck circuit applied to a satellite power supply, including:
the input end is used for inputting a first voltage to the first Buck circuit and the second Buck circuit;
the first Buck circuit is used for receiving the first voltage and outputting a second voltage to an output end in common with the second Buck circuit; the first end of the first Buck circuit is connected with the input end;
the second Buck circuit is used for receiving the first voltage and outputting the second voltage to the output end together with the first Buck circuit; the first end of the second Buck circuit is connected with the input end;
an output terminal for receiving control of the first Buck circuit and the second Buck circuit and outputting the second voltage; the output end is respectively connected with the second ends of the first Buck circuit and the second Buck circuit.
When the high specific power Buck circuit applied to the satellite power supply works, the first voltage provided by the input end outputs the second voltage from the output end through the regulation of the first Buck circuit and the second Buck circuit.
As shown in fig. 1 to 3, in the embodiment of the present application, the input terminal includes: power supply UdcSaid power supply UdcThe positive pole of the first Buck circuit is connected with the first end of the second Buck circuit, and the power supply UdcThe negative electrode of (2) is grounded.
As shown in fig. 1 to 3, in the embodiment of the present application, the first Buck circuit includes: diode Q1Diode D1Triode S1Inductor L1And a capacitor C1Wherein the diode Q1Is connected with a power supply U in the input enddcThe anode is respectively connected with the twoPolar tube D1And the inductance L1The first terminal of the diode D1The anode of the triode S is grounded, and the triode S1Collector of and said diode Q1Of said triode S1Respectively with the emitter and base of the diode Q1The anode of the inductor L1The second end of the capacitor is connected with the anode of the output end, and the capacitor C1Is connected to the positive pole of the output terminal and the second terminal is grounded.
As shown in fig. 1 to 3, in the embodiment of the present application, the second Buck circuit includes: diode Q2Diode D2Triode S2And an inductance L2Wherein the diode Q2Is connected with a power supply U in the input enddcRespectively connected with the anode and the cathode of the diode D2And the inductance L2The first terminal of the diode D2The anode of the triode S is grounded, and the triode S2Collector of and said diode Q2Of said triode S2Respectively with the emitter and base of the diode Q2The anode of the inductor L2The second end of the second switch is connected with the anode of the output end.
As shown in fig. 1, in the embodiment of the present application, the high specific power Buck circuit for a satellite power supply provided by the present invention uses two Buck circuits to interleave and control a transistor S1Triode S2Are equal in pulse width to make the diode Q1Diode Q2The difference of the conduction time is a quarter of a cycle, and the first Buck circuit and the second Buck circuit are connected in parallel in a staggered mode. The switching periods of the first Buck circuit and the second Buck circuit are both set to be T, the conduction time is set to be Ton, the switching frequency f1 of each channel is 1/T, and the duty ratio is set to be D-Ton/T. Therefore, the switching frequency f of the first Buck circuit and the second Buck circuit which are connected in parallel is staggered to be 2f 1.
As shown in fig. 2, in the embodiment of the present application, when the high specific power Buck circuit applied to the satellite power supply provided by the invention operates in a Continuous Conduction Mode (CCM), two paths of equal inductance values, i.e., L, are set for convenient analysis1＝L2L and assuming that the inductive charging and discharging process is linear, the parasitic parameter influence of the switching device is not considered. In one switching cycle, the operation in CCM mode can be divided into four phases, as shown in fig. 2. The operation mode of the circuit in one cycle is analyzed as follows:
the first mode is as follows: triode S1At a high potential, a diode Q1On, diode D2Follow current, triode S2At a low potential, the diode Q2Diode D1Cut-off, inductance L1Storing energy while applying a current iL1Increase the capacitance C1And (6) charging.
Mode two: triode S1At a low potential, the diode Q1Cut-off, diode D2Follow current, triode S2At a low potential, the diode Q2Cut-off diode D1Follow current, inductance L1Inductor L2Releasing energy while applying a current iL1Current iL2Reduction of the capacitance C1And (4) discharging.
Mode three: triode S1At a low potential, the diode Q1Cut-off, diode D2Cut-off, triode S2At a high potential, a diode Q2On, diode D1Follow current, inductance L2Storing energy while applying a current iL2Increase the capacitance C1And (6) charging.
And a fourth mode: triode S1At a low potential, the diode Q1Cut-off, diode D2Follow current, triode S2At a low potential, the diode Q2Cut-off diode D1Follow current, inductance L1Inductor L2Releasing energy while applying a current iL1Current iL2Reduction of the capacitance C1And (4) discharging.
The switching frequencies of the branches of the staggered parallel Buck circuit are the same, but the conduction moments are staggered by 1/N switching cycles, and the parallel operation condition is shown in FIG. 3: the first Buck circuit and the second Buck circuit are triggered synchronously, so that the whole circuit is not different from the Buck circuit; the first Buck circuit and the second Buck circuit are triggered independently, and the triggering frequencies are different, so that the current ripples output by the two branches are randomly offset or superposed with each other; the first Buck circuit and the second Buck circuit work at the same frequency, the trigger signals of all channels are staggered, the output current ripples are mutually counteracted, and meanwhile, the output ripple frequency is twice of that of a single Buck branch circuit.
When the duty cycle of the circuit is not greater than 50%, the converter cycles through the four operating modes described above. In each period, only one of the two inductors is in an energy storage state, and the other inductor is in a freewheeling state, so that the situation that the ripple frequency of each path current is the same as the working frequency of a single Buck circuit is shown, but two freewheeling states exist in one switching period of the whole circuit, namely the frequency of the ripple frequency of the total output current is 2 times of the switching frequency of each branch circuit. When the duty ratio is greater than 50%, the working process of the converter has a working mode that two switching tubes are simultaneously conducted, and the working process is similar to the analysis.
The high specific power Buck circuit applied to the satellite power supply is suitable for deep hole detection, electric propulsion project platforms of low-orbit high-power satellites and other aircraft projects with high specific power and low output current ripple requirements; compared with the prior art, the high specific power Buck circuit applied to the satellite power supply has the characteristics of high specific power and low output current ripple, and is simple in topological structure and high in reliability.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (4)
1. A high specific power Buck circuit applied to a satellite power supply is characterized by comprising:
the input end is used for inputting a first voltage to the first Buck circuit and the second Buck circuit;
the first Buck circuit is used for receiving the first voltage and outputting a second voltage to an output end in common with the second Buck circuit; the first end of the first Buck circuit is connected with the input end;
the second Buck circuit is used for receiving the first voltage and outputting the second voltage to the output end together with the first Buck circuit; the first end of the second Buck circuit is connected with the input end;
an output terminal for receiving control of the first Buck circuit and the second Buck circuit and outputting the second voltage; the output end is respectively connected with the second ends of the first Buck circuit and the second Buck circuit.
2. The high specific power Buck circuit applied to a satellite power supply according to claim 1, wherein the input terminal comprises: power supply UdcSaid power supply UdcThe positive pole of the first Buck circuit is connected with the first end of the second Buck circuit, and the power supply UdcThe negative electrode of (2) is grounded.
3. The high specific power Buck circuit applied to a satellite power supply, according to claim 1, wherein the first Buck circuit comprises: diode Q1Diode D1Triode S1Inductor L1And a capacitor C1Wherein the diode Q1Is connected with a power supply U in the input enddcRespectively connected with the anode and the cathode of the diode D1And the inductance L1The first terminal of the diode D1The anode of the triode S is grounded, and the triode S1Collector of and said diode Q1Of said triode S1Respectively with the emitter and base of the diode Q1The anode of the inductor L1The second end of the capacitor is connected with the anode of the output end, and the capacitor C1Is connected with the positive end of the output endThe pole and the second terminal is grounded.
4. The high specific power Buck circuit applied to a satellite power supply, according to claim 1, wherein the second Buck circuit comprises: diode Q2Diode D2Triode S2And an inductance L2Wherein the diode Q2Is connected with a power supply U in the input enddcRespectively connected with the anode and the cathode of the diode D2And the inductance L2The first terminal of the diode D2The anode of the triode S is grounded, and the triode S2Collector of and said diode Q2Of said triode S2Respectively with the emitter and base of the diode Q2The anode of the inductor L2The second end of the second switch is connected with the anode of the output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010986134.0A CN112260536A (en) | 2020-09-18 | 2020-09-18 | High-specific-power Buck circuit applied to satellite power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010986134.0A CN112260536A (en) | 2020-09-18 | 2020-09-18 | High-specific-power Buck circuit applied to satellite power supply |
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| CN112260536A true CN112260536A (en) | 2021-01-22 |
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| CN202010986134.0A Pending CN112260536A (en) | 2020-09-18 | 2020-09-18 | High-specific-power Buck circuit applied to satellite power supply |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6023154A (en) * | 1997-10-28 | 2000-02-08 | International Rectifier Corporation | Parallel and interwoven buck converter for high efficiency, low voltage power supply |
| CN103441659A (en) * | 2013-09-18 | 2013-12-11 | 矽力杰半导体技术(杭州)有限公司 | Control circuit applied to interlaced parallel switching power supply |
| US8716991B1 (en) * | 2011-02-28 | 2014-05-06 | Volterra Semiconductor Corporation | Switching power converters including air core coupled inductors |
| CN203645383U (en) * | 2013-10-28 | 2014-06-11 | 江苏英伟特新能源技术有限公司 | A Low Current Ripple Solar Charging Device Based on Interleaved Topology |
| CN107863882A (en) * | 2017-11-30 | 2018-03-30 | 安徽维新能源技术有限公司 | Buck converter BUCK circuits |
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2020
- 2020-09-18 CN CN202010986134.0A patent/CN112260536A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6023154A (en) * | 1997-10-28 | 2000-02-08 | International Rectifier Corporation | Parallel and interwoven buck converter for high efficiency, low voltage power supply |
| US8716991B1 (en) * | 2011-02-28 | 2014-05-06 | Volterra Semiconductor Corporation | Switching power converters including air core coupled inductors |
| CN103441659A (en) * | 2013-09-18 | 2013-12-11 | 矽力杰半导体技术(杭州)有限公司 | Control circuit applied to interlaced parallel switching power supply |
| CN203645383U (en) * | 2013-10-28 | 2014-06-11 | 江苏英伟特新能源技术有限公司 | A Low Current Ripple Solar Charging Device Based on Interleaved Topology |
| CN107863882A (en) * | 2017-11-30 | 2018-03-30 | 安徽维新能源技术有限公司 | Buck converter BUCK circuits |
Non-Patent Citations (3)
| Title |
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| 张菲菲: "交错并联Buck变换器研究", 《中国优秀博硕士学位论文全文数据库（硕士）（电子期刊）工程科技Ⅱ辑》 * |
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| 高青: "低纹波输出的多相交错并联BUCK变换器研究", 《中国优秀博硕士学位论文全文数据库（硕士）（电子期刊）工程科技Ⅱ辑》 * |
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