High-frequency isolated AC-DC converter

An AC-DC, high-frequency isolation technology, applied in the direction of converting DC power input to DC power output, AC power input converting to DC power output, instruments, etc. capacity and power supply reliability, reducing volume, and increasing the effect of ripple frequency

Pending Publication Date: 2022-05-27
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies in the above-mentioned prior art, the present invention provides a high-frequency isolated AC-DC converter, which solves the problem that the rectifier circuit part of the AC-DC converter in the prior art rarely has a fault-tolerant function. technical problem

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Embodiment Construction

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Orientation or position indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The relationship is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore It should not be construed as a limitation of the present invention.

[0067] In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features...

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Abstract

The high-frequency isolated AC-DC converter comprises a power factor correction circuit, an LLC resonant DC-DC converter and a topology reconstruction circuit, the output end of the power factor correction circuit is electrically connected with the input end of the DC-DC converter, the power factor correction circuit comprises three bridge arms which are connected in parallel, and the DC-DC converter comprises a fourth bridge arm and a fifth bridge arm which are connected in parallel; the topology reconstruction circuit comprises two bidirectional switch tubes, the first bidirectional switch tube is connected between the midpoint of the first bridge arm and the midpoint of the fourth bridge arm, and the second bidirectional switch tube is connected between the midpoint of the second bridge arm and the midpoint of the fifth bridge arm. And the topology reconstruction circuit is used for switching a two-stage circuit structure of the high-frequency isolation type AC-DC converter into a single-stage circuit structure. The high-frequency isolation type AC-DC converter provided by the invention can still operate normally under the condition that the switch tube breaks down, so that the fault-tolerant capability and the power supply reliability of the converter are improved.

Description

technical field [0001] The present invention relates to the technical field of power electronics, in particular to a high-frequency isolated AC-DC converter. Background technique [0002] Rectifiers are widely used in electric vehicle chargers, new energy power generation systems, multi-electric aircraft, and power supply systems for maglev motors. In these applications, the reliability of the power supply system is particularly important. Therefore, in order to improve the reliability of the power supply system, usually Using an extra power supply as a backup power supply will increase the cost and volume of the system. Using a power supply with fault tolerance can not only improve the reliability of the power supply system, but also have cost, efficiency and volume advantages over the additional backup power supply scheme. . [0003] Usually, the power supply of a power supply system consists of magnetic components, capacitors and power semiconductor devices. In switching...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/32H02M1/42H02M3/335H02M7/04H02M7/217H02M7/219H02M1/12
CPCH02M1/32H02M1/4233H02M3/33569H02M7/04H02M7/217H02M7/219H02M1/12Y02T10/72
Inventor 李广地杨东升周博文赵颖王迎春罗艳红金硕巍
Owner NORTHEASTERN UNIV
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