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Quasi-single-stage AC/DC converter circuit capable of realizing active power decoupling

A conversion circuit and converter technology, applied in the output power conversion device, the conversion of DC power input to DC power output, and the conversion of AC power input to DC power output, etc., can solve the problems of poor reliability and low service life of electrolytic capacitors.

Active Publication Date: 2020-11-24
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, electrolytic capacitors have the disadvantages of low service life and poor reliability, so their application in many power supplies is limited

Method used

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  • Quasi-single-stage AC/DC converter circuit capable of realizing active power decoupling
  • Quasi-single-stage AC/DC converter circuit capable of realizing active power decoupling
  • Quasi-single-stage AC/DC converter circuit capable of realizing active power decoupling

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Embodiment Construction

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus repeated descriptions thereof will be omitted.

[0027] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one...

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Abstract

The invention relates to a quasi-single-stage AC / DC converter circuit capable of realizing active power decoupling. The AC / DC converter circuit comprises: an AC / DC converter circuit; the AC / DC converter comprises an AC / DC converter circuit, an input circuit, a totem-pole PFC circuit, a half-bridge DC / DC conversion circuit and an output load, and active power decoupling of the AC / DC converter circuit can be realized by controlling a third switching tube and a fourth switching tube of the half-bridge DC / DC conversion circuit. According to the invention, active power decoupling of the AC / DC converter can be realized without additional passive devices and complex auxiliary circuit control strategies, a high-capacity capacitor is not needed, and the reliability and stability of the system are greatly improved.

Description

technical field [0001] The present disclosure relates to the field of power electronics, in particular, to a quasi-single-stage AC / DC converter circuit capable of realizing active power decoupling. Background technique [0002] The AC / DC converter realizes the electric energy conversion from AC mains to low-voltage DC, and is an important part of the rectified power supply. Its input power is pulsating power including twice the power frequency fluctuation, and its output power is constant DC power. Therefore, it is necessary to realize decoupling between input and output power inside the AC / DC converter, that is, power decoupling. In a traditional AC / DC converter, a large-capacity capacitor is directly connected to the output terminal, and power decoupling is directly realized through capacitive energy storage, that is, passive power decoupling. Since the required energy storage capacity is usually large, electrolytic capacitors are used. However, electrolytic capacitors h...

Claims

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Application Information

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IPC IPC(8): H02M3/335H02M7/217H02M7/219
CPCH02M3/33576H02M7/217H02M7/219
Inventor 单振宇
Owner BEIHANG UNIV
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