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LLC converter and power supply

A technology of converters and transformers, which is applied to instruments, converting AC power input to DC power output, and converting DC power input to DC power output, etc., which can solve problems such as difficulty in device selection

Inactive Publication Date: 2020-10-27
SHIJIAZHUANG TONHE ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, an embodiment of the present invention provides an LLC converter and a power supply to solve the problem of difficult device selection in the prior art when the three-interleaved LLC circuit is applied to high-power applications

Method used

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  • LLC converter and power supply
  • LLC converter and power supply

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Embodiment Construction

[0043] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0044] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0045] refer to figure 1 , the embodiment of the present invention provides an LLC converter, including: a first voltage dividing capacitor CD2, a second voltage dividing capacitor CD3, a first transformer T1, a second transformer T2, a third transformer T3, a first re...

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Abstract

The invention is suitable for the technical field of power electronics, and provides an LLC converter and a power supply, and the LLC converter comprises a first voltage-dividing capacitor, a second voltage-dividing capacitor, a first transformer, a second transformer, a third transformer, a first resonance unit, a second resonance unit, a third resonance unit, an inversion unit, a three-phase rectification unit, and a controller. The inversion unit comprises six bridge arms, and each bridge arm is composed of two switch tubes which are connected in series. A first end of the primary winding of the first transformer is connected with a connection point of the two switching tubes in the first upper bridge arm through the first resonance unit, and a second end of the primary winding is connected with a connection point of the two switching tubes of the corresponding lower bridge arm; and the connection relations of the transformers are the same. By controlling on-off of each switching tube, the two switching tubes bear bus voltage, the voltage of the switching tubes is reduced, model selection is facilitated, the device cost is low, and the converter is high in efficiency and small in output voltage ripple.

Description

technical field [0001] The invention belongs to the technical field of power electronics, in particular to an LLC converter and a power supply. Background technique [0002] LLC converters are widely used in switching power supplies due to their high efficiency, low switching noise and low EMI. [0003] In the prior art, LLC converters mostly use three interleaved LLC circuits, but when the three interleaved LLC circuits are used in high-power applications, the power switch tubes need to bear all the bus voltage, which brings great difficulty to the selection of devices, and the device cost high. Contents of the invention [0004] In view of this, an embodiment of the present invention provides an LLC converter and a power supply to solve the problem in the prior art that it is difficult to select a device when the three-interleaved LLC circuit is applied to a high-power application. [0005] The first aspect of the embodiments of the present invention provides an LLC co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M7/48
CPCH02M3/33569H02M7/48H02M7/4815Y02B70/10
Inventor 陈超飞徐艳超李金洁赵耀峰吴飞飞张现民史哲
Owner SHIJIAZHUANG TONHE ELECTRONICS TECH CO LTD
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