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Resonant DC-DC converter

A DC-DC and converter technology, applied in the field of vehicle-mounted DC-DC converters and resonant DC-DC converters, can solve the problems of low reliability and easy failure, achieve high conversion efficiency, improve system safety, The effect of high system conversion efficiency

Active Publication Date: 2021-07-23
国网河北省电力有限公司雄安新区供电公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a new type of high-efficiency and reliable resonant DC-DC converter, which is used to solve the problems of low reliability and easy failure of existing resonant DC-DC converters

Method used

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  • Resonant DC-DC converter

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0029] A resonant DC-DC converter of the present invention, such as figure 1 As shown, the DC-DC converter of the present invention mainly consists of a unidirectional LLC resonant converter ( figure 1 upper resonant circuit) and a bidirectional active full-bridge LLC resonant converter ( figure 1 The resonant circuit in the lower part) is composed of interleaved parallel connection, including the primary side circuit of the converter, two resonant circuits (the first resonant circuit 31 and the second resonant circuit 34), two high-frequency transformers (the first high-frequency transformer 32 and the second high-frequency transformer transformer 35), and the converter secondary circuit.

[0030] The primary circuit of the converter includes a converter input terminal, a first filter capacitor 2, a second filter capacitor 14, a first full-bridge inverter ...

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Abstract

The invention relates to a resonant DC-DC converter, which comprises a first inverter circuit, a second inverter circuit, a first resonant circuit, a second resonant circuit, a first high-frequency transformer, a second high-frequency transformer, a first rectifying circuit and a second rectifying circuit, wherein the input end is respectively connected with the direct current input ends of the first inverter circuit and the second inverter circuit; the output ends of the first rectifying circuit and the second rectifying circuit are connected in parallel and then connected with the output end; the output end of the first inverter circuit is connected with the input end of the first resonant circuit, the output end of the first resonant circuit is connected with a primary winding of the first high-frequency transformer, and a secondary winding of the first high-frequency transformer is connected with the first rectifying circuit; and the output end of the second inverter circuit is connected with the input end of the second resonant circuit, the output end of the second resonant circuit is connected with the primary winding of the second high-frequency transformer, and the secondary winding of the second high-frequency transformer is connected with the second rectifying circuit. The converter is composed of the two resonant converters which are connected in parallel in an interleaving mode and serve as redundant backups of each other, and reliability and safety of the converter are improved.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a resonant DC-DC converter, and the device can also be used as a vehicle-mounted DC-DC converter in new energy vehicles. Background technique [0002] In recent years, power electronics technology has developed rapidly, and switching power supply technology, as an important field of power electronics, has gradually become a hot spot in application and research. With its high efficiency and high power density, switching converters have gradually established their mainstream status in the field of switching power supplies. With the continuous development and improvement of industry standards, high frequency, modularization, and digitization have become the main development trends of switching power supplies. In order to meet the needs of the development trend, the requirements for the volume and weight of switching power supply devices are constantly increasing. [0003] At prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/32
CPCH02M3/335H02M3/3353H02M1/32H02M3/33569
Inventor 马涛侯磊刘洋祁天星付龙聂向欣张茂鹏
Owner 国网河北省电力有限公司雄安新区供电公司
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