CN112636599A - Direct-current high-voltage to direct-current low-voltage converter circuit and conversion method - Google Patents
Direct-current high-voltage to direct-current low-voltage converter circuit and conversion method Download PDFInfo
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- CN112636599A CN112636599A CN202011258578.9A CN202011258578A CN112636599A CN 112636599 A CN112636599 A CN 112636599A CN 202011258578 A CN202011258578 A CN 202011258578A CN 112636599 A CN112636599 A CN 112636599A
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
Abstract
The invention discloses a circuit and a method for converting direct current high voltage into direct current low voltage converter, wherein the circuit comprises: the device comprises N paths of full-bridge circuits, a transformer, a post-stage rectification filter circuit and a drive control circuit, wherein the N paths of full-bridge circuits are sequentially connected in series to invert the direct-current high voltage into the required alternating-current high voltage; the input negative end of each full-bridge circuit is connected with the input positive end of the next full-bridge circuit in series, the input positive end of the first full-bridge circuit is connected with the input high-voltage end, the input negative end of the Nth full-bridge circuit is connected with the input low-voltage end, the output end of each full-bridge circuit is sequentially connected with the input end of the transformer, and the transformer reduces the alternating-current high voltage to the alternating-current low voltage; the output end of the transformer is connected with a rear-stage rectification filter circuit, and the rear-stage rectification filter circuit converts the alternating-current low voltage into direct-current low voltage; the drive control circuit provides drive for the N-path full-bridge circuit and stabilizes the direct current low voltage.
Description
Technical Field
The invention relates to the field of high-voltage converters, in particular to a direct-current high-voltage to direct-current low-voltage converter circuit and a direct-current high-voltage to direct-current low-voltage converter converting method.
Background
For the power supply of a radar with dozens of MW levels, if low-voltage AC380V is adopted, the current can reach hundreds of thousands of amperes, the heat productivity is brought, meanwhile, the number of power supply cables is greatly increased, and the radar withdrawal is seriously influenced; if high-voltage power supply is adopted, the power supply current is greatly reduced, and the number of cables is greatly reduced. There is a trend towards high voltage DC-DC converters.
Disclosure of Invention
The invention aims to provide a direct current high-voltage to direct current low-voltage converter circuit and a conversion method, which are used for solving the problems of low-voltage power supply efficiency and excessive power supply cables.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a dc high-voltage to dc low-voltage converter circuit, including: the method comprises the following steps: n paths of full bridge circuits, a transformer, a post-stage rectification filter circuit and a drive control circuit, wherein,
the N paths of full-bridge circuits are sequentially connected in series, and the direct-current high voltage is inverted into the required alternating-current high voltage; the input negative end of each full-bridge circuit is connected with the input positive end of the next full-bridge circuit in series, the input positive end of the first full-bridge circuit is connected with the input high-voltage end, the input negative end of the Nth full-bridge circuit is connected with the input low-voltage end, the output end of each full-bridge circuit is sequentially connected with the input end of the transformer, and the transformer reduces the alternating-current high voltage to the alternating-current low voltage; the output end of the transformer is connected with a rear-stage rectification filter circuit, and the rear-stage rectification filter circuit converts the alternating-current low voltage into direct-current low voltage; the drive control circuit provides drive for the N-path full-bridge circuit and stabilizes the direct current low voltage.
In a specific embodiment, the positive input terminal of the N full-bridge circuits receives a dc voltage of 11.2kV to 16.8kV, the negative input terminal of the N full-bridge circuit receives a voltage of 0, and the dc voltage received by the positive input terminal of the N full-bridge circuit is greater than the dc voltage received by the positive input terminal of the N +1 full-bridge circuit.
In one specific embodiment, the N-20.
In a specific embodiment, the dc high voltage is 14kV, the ac low voltage is 700V, and the dc low voltage is 700V.
In a specific embodiment, the circuit further comprises an auxiliary power supply for providing an operating voltage to the drive control circuit.
A second aspect of the present invention provides a method for voltage conversion using the circuit of the first aspect of the present invention, comprising:
the direct-current high voltage is inverted into required alternating-current high voltage through the N-path full bridge circuit;
the alternating-current high voltage is reduced to alternating-current low voltage through the transformer;
the alternating current low voltage is converted into direct current low voltage through the rear-stage rectification filter circuit;
the drive control circuit provides drive for the N-path full-bridge circuit and stabilizes the direct current low voltage.
The invention has the following beneficial effects:
the invention adopts the high-voltage DC-DC converter, fundamentally avoids adopting a power frequency transformer for high-voltage power supply, can greatly reduce the volume of the device and simultaneously reduces the heat productivity.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 shows a schematic diagram of a dc-to-dc low-voltage converter circuit according to an embodiment of the invention.
Detailed Description
In order to make the technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
A first embodiment of the present invention provides a dc-to-dc converter circuit, as shown in fig. 1, including: an N-path full bridge circuit, which takes 20 paths as an example in the figure, a transformer 21, a post-stage rectifying and filtering circuit 22 and a driving control circuit 23, wherein,
the N paths of full-bridge circuits are sequentially connected in series, and the direct-current high voltage is inverted into the required alternating-current high voltage; the input negative end of each full-bridge circuit is connected with the input positive end of the next full-bridge circuit in series, the input positive end of the first full-bridge circuit is connected with the input high-voltage end, the input negative end of the Nth full-bridge circuit is connected with the input low-voltage end, the output end of each full-bridge circuit is sequentially connected with the input end of the transformer, and the transformer reduces the alternating-current high voltage to the alternating-current low voltage; the output end of the transformer is connected with a rear-stage rectification filter circuit, and the rear-stage rectification filter circuit converts the alternating-current low voltage into direct-current low voltage; the drive control circuit provides drive for the N-path full-bridge circuit and stabilizes the direct current low voltage.
In a specific embodiment, the positive input terminal of the N full-bridge circuits receives a dc voltage of 11.2kV to 16.8kV, the negative input terminal of the N full-bridge circuit receives a voltage of 0, and the dc voltage received by the positive input terminal of the N full-bridge circuit is greater than the dc voltage received by the positive input terminal of the N +1 full-bridge circuit.
In one specific embodiment, the N-20.
In a specific embodiment, the dc high voltage is 14kV, the ac low voltage is 700V, and the dc low voltage is 700V.
In a particular embodiment, the circuit further comprises an auxiliary power supply 24 for providing an operating voltage to the drive control circuit.
A second embodiment of the present invention provides a method for performing voltage conversion using the circuit according to the first embodiment of the present invention, including:
the direct-current high voltage is inverted into required alternating-current high voltage through the N-path full bridge circuit;
the alternating-current high voltage is reduced to alternating-current low voltage through the transformer;
the alternating current low voltage is converted into direct current low voltage through the rear-stage rectification filter circuit;
the drive control circuit provides drive for the N-path full-bridge circuit and stabilizes the direct current low voltage.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (6)
1. A dc high voltage to dc low voltage converter circuit, comprising: n paths of full bridge circuits, a transformer, a post-stage rectification filter circuit and a drive control circuit, wherein,
the N paths of full-bridge circuits are sequentially connected in series, and the direct-current high voltage is inverted into the required alternating-current high voltage; the input negative end of each full-bridge circuit is connected with the input positive end of the next full-bridge circuit in series, the input positive end of the first full-bridge circuit is connected with the input high-voltage end, the input negative end of the Nth full-bridge circuit is connected with the input low-voltage end, the output end of each full-bridge circuit is sequentially connected with the input end of the transformer, and the transformer reduces the alternating-current high voltage to the alternating-current low voltage; the output end of the transformer is connected with a rear-stage rectification filter circuit, and the rear-stage rectification filter circuit converts the alternating-current low voltage into direct-current low voltage; the drive control circuit provides drive for the N-path full-bridge circuit and stabilizes the direct current low voltage.
2. The circuit of claim 1, wherein the positive input terminal of the N full-bridge circuit receives a dc voltage of 11.2kV to 16.8kV, the negative input terminal of the N receives a voltage of 0, and the positive input terminal of the N receives a dc voltage greater than the dc voltage received by the positive input terminal of the N +1 th input terminal.
3. The circuit of claim 1, wherein N-20.
4. The circuit of claim 1, wherein the high dc voltage is 14kV, the low ac voltage is 700V, and the low dc voltage is 700V.
5. The circuit of claim 1, further comprising an auxiliary power supply for providing an operating voltage to the drive control circuit.
6. A method of voltage conversion using the circuit of any of claims 1-5, comprising:
the direct-current high voltage is inverted into required alternating-current high voltage through the N-path full bridge circuit;
the alternating-current high voltage is reduced to alternating-current low voltage through the transformer;
the alternating current low voltage is converted into direct current low voltage through the rear-stage rectification filter circuit;
the drive control circuit provides drive for the N-path full-bridge circuit and stabilizes the direct current low voltage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011258578.9A CN112636599B (en) | 2020-11-12 | 2020-11-12 | Direct-current high-voltage to direct-current low-voltage converter circuit and conversion method |
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| CN202011258578.9A CN112636599B (en) | 2020-11-12 | 2020-11-12 | Direct-current high-voltage to direct-current low-voltage converter circuit and conversion method |
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| CN112636599A true CN112636599A (en) | 2021-04-09 |
| CN112636599B CN112636599B (en) | 2022-07-29 |
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| CN102545628A (en) * | 2011-12-26 | 2012-07-04 | 上海交通大学 | Conversion circuit for high-voltage input and low-voltage output |
| CN202550882U (en) * | 2012-03-29 | 2012-11-21 | 上海交通大学 | Dual-full bridge inverter DC (Direct Current) voltage reducing circuit |
| CN103427657A (en) * | 2013-08-01 | 2013-12-04 | 南京南瑞继保电气有限公司 | High-voltage DC-DC conversion device |
| CN104852583A (en) * | 2015-04-16 | 2015-08-19 | 清华大学 | High-frequency link multi-level direct-current transformer used for middle- low-voltage direct current distribution |
| CN107634655A (en) * | 2017-08-07 | 2018-01-26 | 北京交通大学 | A kind of Novel DC electric power electric transformer topology that removing solid capacity is autotomyed with failure |
| CN107863884A (en) * | 2017-11-07 | 2018-03-30 | 清华大学 | A kind of multiple module commutator transformer |
| CN208461698U (en) * | 2017-11-24 | 2019-02-01 | 中国能源建设集团广东省电力设计研究院有限公司 | Commutator transformer topological structure |
| US20190097543A1 (en) * | 2016-05-25 | 2019-03-28 | Leopold Kostal Gmbh & Co. Kg | Bidirectional DC Converter Assembly Having Cascade of Isolated Resonant Converter and Step-Up/Step-Down Converter |
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2020
- 2020-11-12 CN CN202011258578.9A patent/CN112636599B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545628A (en) * | 2011-12-26 | 2012-07-04 | 上海交通大学 | Conversion circuit for high-voltage input and low-voltage output |
| CN202550882U (en) * | 2012-03-29 | 2012-11-21 | 上海交通大学 | Dual-full bridge inverter DC (Direct Current) voltage reducing circuit |
| CN103427657A (en) * | 2013-08-01 | 2013-12-04 | 南京南瑞继保电气有限公司 | High-voltage DC-DC conversion device |
| CN104852583A (en) * | 2015-04-16 | 2015-08-19 | 清华大学 | High-frequency link multi-level direct-current transformer used for middle- low-voltage direct current distribution |
| US20190097543A1 (en) * | 2016-05-25 | 2019-03-28 | Leopold Kostal Gmbh & Co. Kg | Bidirectional DC Converter Assembly Having Cascade of Isolated Resonant Converter and Step-Up/Step-Down Converter |
| CN107634655A (en) * | 2017-08-07 | 2018-01-26 | 北京交通大学 | A kind of Novel DC electric power electric transformer topology that removing solid capacity is autotomyed with failure |
| CN107863884A (en) * | 2017-11-07 | 2018-03-30 | 清华大学 | A kind of multiple module commutator transformer |
| CN208461698U (en) * | 2017-11-24 | 2019-02-01 | 中国能源建设集团广东省电力设计研究院有限公司 | Commutator transformer topological structure |
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