Asymmetric half-bridge stepless power regulation device and method

Abstract

The invention provides an asymmetric half-bridge stepless power regulation device and method. The asymmetric half-bridge stepless power regulation device comprises: a power regulation signal generation circuit used for providing a power regulation signal; a square wave signal generation circuit used for generating and outputting a first square wave signal and a second square wave signal which are complementary; a time sequence modulation signal generation circuit used for receiving the power regulation signal and generating a first time sequence modulation signal and a second time sequence modulation signal; a first modulation circuit used for receiving the first square wave signal and the second time sequence modulation signal and modulating to generate a first power switch tube driving signal; a second modulation circuit used for receiving the first square wave signal and the first time sequence modulation signal and modulating the first square wave signal and the first time sequence modulation signal to generate a third square wave signal; and a signal combination processing circuit used for modulating and generating a second power switch tube driving signal. Continuous stepless adjustment of the asymmetric half-bridge output power is realized.

Description

technical field [0001] The invention relates to the technical field of half-bridge power regulation, in particular to an asymmetrical half-bridge stepless power regulation device and a stepless power regulation method. Background technique [0002] LC resonant power supply is mostly driven by half-bridge mode, which is alternately driven by two push-pull power switch tubes in the half-bridge structure; [0003] However, in the process of realizing the technical solution of the invention in the embodiment of the present application, the inventor of the present application found that the above-mentioned technology has at least the following technical problems: [0004] In addition to the dead time, the LC resonant power supply basically realizes the phenomenon that two power switch tubes are turned off at the same time during the normal working period, and the loss of the power switch tube is mainly caused by conduction, turn-off, turn-on, and loop feedback losses, of which th...

AI Technical Summary

Problems solved by technology

[0005] However, using an asymmetrical half-bridge to drive the LC resonant power supply makes it difficult to deduce the inevitable relationship between the input signal and the output power. The adjustment process is relatively difficult and cumbersome, and it cannot provide users with a good experience while saving costs.

Images