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An isolated mixed modulation triple output dc-dc converter based on a three-phase llc resonant circuit and a phase-shifted full-bridge circuit

A technology of DC-DC and resonant circuit, which is applied in the field of isolated mixed modulation three-way output DC-DC converter, which can solve the problems of not achieving mutual independence and isolation of outputs, and achieve low cross-regulation rate, low cost, and reduced volume The effect of loss

Active Publication Date: 2019-10-18
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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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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  • An isolated mixed modulation triple output dc-dc converter based on a three-phase llc resonant circuit and a phase-shifted full-bridge circuit
  • An isolated mixed modulation triple output dc-dc converter based on a three-phase llc resonant circuit and a phase-shifted full-bridge circuit
  • An isolated mixed modulation triple output dc-dc converter based on a three-phase llc resonant circuit and a phase-shifted full-bridge circuit

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Embodiment Construction

[0058] 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.

[0059] A hybrid modulation three-way output DC-DC converter based on a three-phase LLC resonant circuit and a phase-shifted full-bridge circuit, including a three-phase LLC resonant circuit and two phase-shifted full-bridge circuits; the primary side of the three-phase LLC resonant circuit It is a half-bridge structure, and the secondary side is a three-phase full-bridge rectification circuit structure; the primary side of the phase-shifted full-bridge circuit is a full-bridge circuit, and the secondary side is a full-wave rectification structure. The diodes used are all...

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Abstract

The invention discloses an isolated mixed modulation three-way output DC-DC converter based on a three-phase LLC resonant circuit and a phase-shifted full-bridge circuit, comprising: an input power supply; Converted to a high DC output voltage, the secondary side is a full-wave rectifier circuit structure; a phase-shifted full-bridge circuit includes a first branch and a second branch, and the first branch is connected to the parallel full-bridge LLC resonant circuit Between the first bridge arm and the second bridge arm, the DC input voltage is converted into a first low DC output voltage by adjusting the phase between the two bridge arms; the second branch is connected to the parallel full bridge LLC Between the second bridge arm and the third bridge arm of the resonant circuit, the phase between the two bridge arms is adjusted to convert the DC input voltage into the second lowest DC output voltage; the secondary side is a full-wave rectification circuit structure. The converter has the advantages of electrical isolation, low cost and high efficiency.

Description

technical field [0001] The invention belongs to the field of power electronics, and in particular relates to an isolated mixed modulation three-way output DC-DC converter based on a three-phase LLC resonant circuit and a phase-shifted full-bridge circuit. Background technique [0002] With the development of modern technology, many new types of electrical equipment have higher and higher requirements for power supply. Many electrical equipment require multiple DC voltages for power supply during operation. To ensure the reliability and independence of power supply, each DC voltage is required. Voltages are isolated from each other. For example, in an electric vehicle, while charging the power battery, it is necessary to simultaneously supply power to other devices on the vehicle. In traditional converters, multiple converters are used to supply power to electrical equipment, which will increase the cost and volume of the system, and is not conducive to the integration of eq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33561H02M3/33569H02M1/0048H02M1/0058Y02B70/10
Inventor 邓焰李广地夏晋王昆陈桂鹏
Owner ZHEJIANG UNIV
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