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A kind of llc resonant converter

A technology of resonant converters and transformers, applied in the field of converters, can solve problems such as difficulty in adapting to the range of input and output voltages

Active Publication Date: 2017-04-19
SUNGROW POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the present invention provides an LLC resonant converter to solve the problem that the prior art is difficult to adapt to an excessively wide input and output voltage range

Method used

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  • A kind of llc resonant converter
  • A kind of llc resonant converter
  • A kind of llc resonant converter

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0045] The invention provides an LLC resonant converter to solve the problem in the prior art that it is difficult to adapt to an excessively wide input and output voltage range.

[0046] Specifically, such as figure 2 As shown, the LLC resonant converter includes a bidirectional switch K, one end of the bidirectional switch K is connected to the connection point of the resonant inductor L and the resonant capacitor C, and the other end of the bidirectional s...

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Abstract

The invention provides an LLC resonant converter. A boosting link is built by a primary side bridge arm and a resonant inductor through added two-way switch; boosting control on the LLC resonant converter can be achieved through the controller with respect to control on the two-way switch, so as to adapt to relatively wide input and output voltage ranges. The problem that the prior art cannot easily adapt to over-wide input and output voltage ranges is solved.

Description

technical field [0001] The invention relates to the technical field of converters, in particular to an LLC resonant converter. Background technique [0002] The resonant converter in the LLC resonant converter has many advantages, such as low noise, low stress, fewer components and only less switching losses. Such as figure 1 As shown, the resonant converter includes a resonant circuit 101, a high-frequency transformer 102, and a rectifier circuit 103; wherein the resonant circuit 101 can work at a fixed frequency near the resonant frequency, but when the input voltage changes, frequency modulation is required to adapt to this voltage change , as the frequency shifts, the circuit loss will increase and the system efficiency will decrease; in addition, the non-linear characteristics of the frequency conversion control may also mismatch the load characteristics of the circuit, resulting in unstable operation of the circuit. It is difficult for the resonant circuit 101 to ada...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCY02B70/10
Inventor 刘宝其胡兵薛丽英崔开涌
Owner SUNGROW POWER SUPPLY CO LTD
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