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Control method of LLC resonant circuit and LLC resonant circuit

A resonant circuit and control method technology, applied in the circuit field, can solve problems affecting the performance of LLC circuits and large output ripples, and achieve the effects of eliminating AC components, reducing output ripples, and improving performance

Pending Publication Date: 2022-03-08
SHINRY TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the existing control method of the LLC circuit may cause its output ripple to be large, thereby affecting the performance of the LLC circuit

Method used

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  • Control method of LLC resonant circuit and LLC resonant circuit
  • Control method of LLC resonant circuit and LLC resonant circuit
  • Control method of LLC resonant circuit and LLC resonant circuit

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Embodiment Construction

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical methods in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

[0043] When the input of the LLC circuit is a DC superimposed AC signal, the existing control method of the LLC circuit easily causes an AC component to be superimposed on its output, resulting in a large output ripple, thereby affecting the performance of the LLC circuit.

[0044] Therefore, the technical problem to be solved in this application is: how to ...

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Abstract

The embodiment of the invention discloses a control method of an LLC resonant circuit and the LLC resonant circuit. The LLC resonant circuit comprises a control module and a resonant module, and the resonant module comprises at least two switching devices. The method comprises the steps that the control module obtains a direct-current voltage component and an alternating-current voltage component included in the input voltage of the resonance module; the control module determines a target frequency according to the DC voltage component, the AC voltage component and the output voltage of the resonance module. And the control module generates a target driving signal according to the target frequency. And the control module turns on or turns off the at least two switching devices through the target driving signal. By adopting the embodiment of the invention, the problem that the AC component exists in the output due to the existence of the AC component in the input of the LLC resonant circuit can be reduced or eliminated, the output ripple of the LLC resonant circuit can be reduced, and the performance of the LLC resonant circuit is improved.

Description

technical field [0001] The present application relates to the field of circuits, in particular to a method for controlling an LLC resonant circuit and the LLC resonant circuit. Background technique [0002] The LLC resonant circuit (also referred to as the LLC circuit) is a circuit that achieves a constant output voltage by controlling the frequency of the switching device. In recent years, LLC circuits have gradually attracted people's attention because of their excellent performance. [0003] In the existing LLC circuit control method, when the input of the LLC circuit is a DC superimposed AC signal, the output of the LLC circuit is usually superimposed with an AC component when the efficiency of the control loop corresponding to the LLC circuit is low. . Therefore, the existing control method of the LLC circuit may cause a large output ripple, which further affects the performance of the LLC circuit. Contents of the invention [0004] The application provides a contr...

Claims

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Application Information

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IPC IPC(8): H02M3/335H02M1/14
CPCH02M3/33569H02M3/33523H02M1/14Y02B70/10
Inventor 邓家勇刘鹏飞石炼之吴壬华
Owner SHINRY TECH
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