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LLC resonant conversion circuit and LLC resonant converter

A technology of resonant transformation and resonant inductance, applied in the field of circuits, can solve problems such as uneven current flow in parallel, and achieve the effect of solving uneven current flow in parallel

Pending Publication Date: 2022-06-07
西安图为电气技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an LLC resonant conversion circuit and an LLC resonant converter, which are used to solve the problem of uneven parallel current flow caused by the parallel connection of two LLC circuits existing in the prior art

Method used

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  • LLC resonant conversion circuit and LLC resonant converter
  • LLC resonant conversion circuit and LLC resonant converter
  • LLC resonant conversion circuit and LLC resonant converter

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Embodiment Construction

[0047]In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. . Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] like figure 1 As shown, it is a kind of LLC resonant conversion circuit in the related art, the LLC resonant conversion circuit includes two half-bridge LLC circuits, the two half-bridge LLC circuits are connected in parallel to the input end and the output end, and each half-bridge LLC circuit It includes a half-bridge chopper circuit, a resonant inductor, a rectifier circuit and a resonant capacitor. The half-bridge...

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Abstract

The invention discloses an LLC resonant conversion circuit and an LLC resonant converter, the LLC resonant conversion circuit comprises an input end, a first half-bridge LLC circuit, a second half-bridge LLC circuit, an output end, a conversion device, a first driving end and a second driving end, the first half-bridge LLC circuit and the second half-bridge LLC circuit are connected in parallel between the input end and the output end, the conversion device is respectively connected with the resonant cavities of the two half-bridge LLC circuits and is used for connecting the two resonant cavities in series, and the two driving ends input different driving signals in a crossed manner, so that the current of the resonant cavity of each half-bridge LLC circuit passes through the resonant cavity of the other half-bridge LLC circuit, and the current of the resonant cavities of the two LLC circuits is equal; rectified output currents of the two half-bridge LLC circuits are also equal, so that the problem of non-uniform parallel currents can be solved.

Description

technical field [0001] The invention relates to the field of circuits, in particular to an LLC resonant conversion circuit and an LLC resonant converter. Background technique [0002] The LLC resonant conversion circuit is widely used because the switching device works in a soft switching state during the working process, with low loss and high efficiency. However, the LLC resonant conversion circuit is very sensitive to the parameters of the device, especially the device parameters of the resonant cavity, such as the inductance of the resonant inductor and the capacitance of the resonant capacitor. Compared with the resistance device, the inductance and capacitance are usually larger errors. , the accuracy is not easy to control. Variations in the parameters of the device of the resonator will cause the state of the resonator to change, resulting in poor consistency of the final product. [0003] If two LLC circuits are connected in parallel, since the parameters of the r...

Claims

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Application Information

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IPC IPC(8): H02M3/335H02M3/156H02M1/32
CPCH02M3/33569H02M3/33576H02M3/156H02M1/32Y02B70/10
Inventor 石伟刘中伟肖正虎史耀华
Owner 西安图为电气技术有限公司
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