Three-level DC-DC converter and circuit control method
A DC-DC, circuit control technology, applied in control/regulation systems, output power conversion devices, instruments, etc., can solve the problem of increased design cost, increased design cost of DC-DC power supply, and decreased reliability of DC-DC power supply, etc. problem, to achieve the effect of improving reliability and wide voltage range
Inactive Publication Date: 2019-05-17
XIAN TGOOD INTELLIGENT CHARGING TECH CO LTD +1
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[0002] When the existing dual-level DC-DC (Direct Current-Direct Current, DC-DC) converter is used to realize the manufacture of high-voltage DC-DC power supplies, it is unavoidable to use power transistors with high withstand voltage levels, resulting in The design cost of the DC-DC power supply increases significantly, and even in the power supply products that have adopted the three-level topology, it is inevitable to add an additional voltage equalizing circuit, which will also lead to an increase in the design cost of the DC-DC power supply, and will also make the Decreased reliability of DC-DC power supplies
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[0041] Further, please see again figure 2 , the three-level DC-DC converter 10 can also include a drive unit 13 and a microprocessor 14, the input end of the drive unit 13 is connected to the microprocessor 14, and the output end is connected to each switch tube, wherein the drive unit 13 is used for Under the control of the microprocessor 14, a driving signal is provided to each switch tube so that each switch tube is in an off or on state. As an implementation, the driving unit 13 is provided with a plurality of output terminals corresponding to each switching tube, and the multiple output terminals of the driving unit 13 are respectively connected to the gate of the first switching tube Q1 in the first conversion branch 11. , the grid of the second switching tube Q2, the grid of the third switching tube Q3, the grid of the fourth switching tube Q4, and the grid of the first switching tube Q1 in the second conversion branch 12, the grid of the second switching tube Q2 The ...
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The embodiment of the invention provides a three-level DC-DC converter and a circuit control method, wherein the three-level bidirectional power conversion can be realized on the premise of not increasing the power supply cost through the symmetrical and reasonable circuit design of the three-level DC-DC converter, and the bidirectional voltage can be increased and decreased, so that the bidirectional wide voltage range is realized. In addition, according to the invention, based on the three-level DC-DC converter, the problem of overlarge ripple current of an inductor in the prior art can be effectively solved through the staggered control of the switching tubes, the reliability of the converter can be effectively improved, and the voltage-sharing regulation of the voltage on the input andoutput circuit by controlling the duty ratio of the switching tubes can be realized.
Description
technical field [0001] The present invention relates to the technical field of power electronics, in particular, to a three-level DC-DC converter and a circuit control method. Background technique [0002] When the existing dual-level DC-DC (Direct Current-Direct Current, DC-DC) converter is used to realize the manufacture of high-voltage DC-DC power supplies, it is unavoidable to use power transistors with high withstand voltage levels, resulting in The design cost of the DC-DC power supply increases significantly, and even in the power supply products that have adopted the three-level topology, it is inevitable to add an additional voltage equalizing circuit, which will also lead to an increase in the design cost of the DC-DC power supply, and will also make the The reliability of the DC-DC power supply is reduced. Contents of the invention [0003] In view of this, the present invention provides a three-level DC-DC converter and a circuit control method, which can effe...
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IPC IPC(8): H02M3/158
Inventor 陈敬赓王利强吕剑
Owner XIAN TGOOD INTELLIGENT CHARGING TECH CO LTD