LLC resonant converter optimization design method

A resonant converter, optimized design technology, applied in the direction of converting DC power input to DC power output, instruments, adjusting electrical variables, etc. question

Active Publication Date: 2015-09-16
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +2
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Problems solved by technology

[0005] In view of this, the object of the present invention is to propose a method for optimal design of LLC resonant converter based on power factor angle evaluation, which solves the problem that the evaluation indicators of traditional LLC resonant converter optimal design method are not intuitive, inconsistent with each other and cannot be comprehensively considered in optimal design Many performance problems of the converter, while taking into account the conversion efficiency and safety of the resonant converter

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Embodiment Construction

[0044] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0045] Detailed exemplary embodiments are disclosed below. However, specific structural and functional details disclosed herein are merely for purposes of describing example embodiments.

[0046] It should be understood, however, that the invention is not limited to the particular exemplary embodiments disclosed, but covers all modifications, equivalents, and alternatives falling within the scope of the disclosure. Throughout the description of the figures, the same reference numerals denote the same elements.

[0047] Also, it should be understood that as used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Also it will be understood that when a component or unit is referred to as being “connected” or “coupled” to another component or unit, it can be directly connected or coupled to the other component or ...

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Abstract

An LLC resonant converter optimization design method comprises the steps of: A, acquiring the performance parameters of an LLC resonant converter; B, converting an LLC resonant converter circuit into an equivalent circuit; C, according to the condition that the power factor angle of the resonant circuit power factor is zero, determining the first relation between the specific value m of the magnetizing inductance and the resonant inductance of the LLD resonant converter and the quality factor Q; D, according to the relation between the voltage gain and the normalization operating frequency extremal point, determining the second relation between the specific value m of the magnetizing inductance and the resonant inductance of the LLD resonant converter and the quality factor Q; E, combining the first relation with the second relation, calculating the specific value m of the magnetizing inductance and the resonant inductance of the LLC resonant converter and the quality factor Q; and F, on the basis of the specific value m of the magnetizing inductance and the resonant inductance and the quality factor Q, determining the resonant inductance, the magnetizing inductance and the resonant capacitance value of the LLC resonant converter. The LLC resonant converter optimization design method can implement the design policy that both the conversion efficiency and the safety of the LLC resonant converter are given consideration.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to the technology and analysis technology of the resonant converter. Background technique [0002] The LLC resonant converter was first proposed in the 1980s. It is improved by adding a parallel resonant inductor on the basis of the traditional LC second-order resonant converter. Compared with ordinary series and parallel resonant converters, the characteristics have been significantly improved. . In recent years, the LLC resonant converter has become a popular topology for power converter research, and has been successfully applied to different power supply products to achieve high-performance DC / DC conversion. [0003] The LLC resonant converter has wide load and wide input voltage range, and has advantages that the simple series resonant converter and the parallel resonant converter cannot match, so it has received extensive attention and in-depth research by technicia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/338
Inventor 颜湘武孙磊张波曲伟吕正杨漾方雨康
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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