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Mixed modulation isolation type three-circuit output DC-DC converter

A DC-DC, hybrid modulation technology, applied in output power conversion devices, regulating electrical variables, converting DC power input to DC power output, etc., can solve the problem of not achieving mutual independence and isolation of outputs, and reduce the volume. and loss, reduce the cross-regulation rate, improve the efficiency of the effect

Active Publication Date: 2018-08-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technical content can easily realize soft switching and improve efficiency, but it does not realize mutual independence and isolation between outputs.

Method used

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  • Mixed modulation isolation type three-circuit output DC-DC converter
  • Mixed modulation isolation type three-circuit output DC-DC converter
  • Mixed modulation isolation type three-circuit output DC-DC converter

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Embodiment Construction

[0062] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0063] A hybrid modulation isolated three-way output DC-DC converter, including a parallel full-bridge LLC resonant circuit and two phase-shifted full-bridge circuits; the primary side of the full-bridge LLC resonant circuit is a full-bridge circuit structure, and the secondary side is a full-bridge circuit structure. Wave rectification circuit structure; the diodes used are all power diodes.

[0064] Such as figure 1 As shown, the primary side circuit includes:

[0065] 1) vs. input voltage V in The first primary side branch connected in parallel is composed of the f...

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Abstract

The invention discloses a mixed modulation isolation type three-circuit output DC-DC converter. The converter comprises an input power supply, a parallel full bridge LLC resonant circuit and a phase shifting full bridge circuit, wherein the parallel full bridge LLC resonant circuit converts a direct current input voltage into a high direct current output voltage by adopting a frequency modulationmode, and has a secondary side adopting a full wave rectifying circuit structure; the phase shifting full bridge circuit comprises a first branch and a second branch; the first branch is connected between any two bridge arms of the parallel full bridge LLC resonant circuit, and converts the direct current input voltage into a first low direct current output voltage by adjusting the phases betweenthe two bridge arms; the second branch is connected between the two residual bridge arms of the parallel full bridge LLC resonant circuit, and converts the direct current input voltage into the secondlow direct current output voltage by adjusting the phases between the two bridge arms; and the secondary side adopts the full wave rectifying circuit structure. The converter can realize mutual isolation of three circuits of output through two different control methods between the two bridge arms.

Description

technical field [0001] The invention belongs to the field of power electronics, and in particular relates to a hybrid modulation isolation type three-way output DC-DC converter. Background technique [0002] With the development of digital control technology, the power supply requirements for many new electrical equipment are getting higher and higher. Many electrical equipment require both high-voltage DC power supply and multi-channel low-voltage DC power supply for auxiliary systems and control systems during operation. powered by. If multiple input power sources are used for power supply, the size and cost of the system will be increased, which is not conducive to equipment integration. However, in the traditional multi-output circuit, several output voltages cannot be completely isolated and adjusted independently. When one of the output states fluctuates, it will have a greater impact on the other two outputs, which will seriously affect the overall stability of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33569H02M1/0067H02M1/0077H02M1/009Y02B70/10
Inventor 邓焰李广地夏晋陈桂鹏王昆
Owner ZHEJIANG UNIV
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