Resonant power supply conversion circuit of zero-voltage switch and converter

Abstract

The invention relates to the technical field of power supply resonance, and particularly discloses a zero-voltage switch resonance power supply conversion circuit and a converter, and the circuit comprises a resonance circuit, a resonance controller, an energy coupling and level shifting circuit, a zero-voltage detection circuit, an isolation transformer, a rectification circuit, a PFC circuit, and a filter circuit. According to the invention, the switching tube of the power supply converter can realize zero-voltage switching in a wide input voltage range, the switching loss is low, and the efficiency of the power supply converter is high; the power converter can adapt to large-range change and adjustment of input voltage and output voltage. Therefore, the power converter is only providedwith one power switching device, the power switching device can adopt a driving mode with the ground as a reference point, and the circuit structure is simplified. Therefore, the isolation transformerof the power supply converter does not participate in resonance, the adaptability of the power supply converter to load change is improved, the power supply converter can realize zero-voltage switching in a full-load range, and the efficiency is improved.

Description

technical field [0001] The invention relates to the field of power resonance technology, in particular to a zero-voltage switching resonant power conversion circuit and converter. Background technique [0002] At present, the focus of power conversion technology research is high efficiency and high power density, so that the power converter can be miniaturized and meet the energy efficiency requirements, so as to facilitate the use of various electrical equipment. To achieve this goal, the operating frequency of the power converter needs to be increased , if the operating frequency is simply increased, it will inevitably lead to an increase in loss, a decrease in the efficiency of the power converter, and damage to the converter due to an increase in temperature. Therefore, the general power converter will consider using soft switching technology to achieve the purpose of reducing loss. [0003] In low-power power converters, topological circuits such as active clamp flyback...

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a resonant power conversion circuit and converter with zero-voltage switching, which solves the technical problem that the conversion topology circuit of the existing power converter cannot simultaneously meet the requirements of zero-voltage switching, wide-range voltage adjustment, and less power switching devices , Adapt to a wide range of load changes

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