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Buck PFC circuit based on resonant switched capacitor converter

A technology of switching capacitors and converters, which is applied to conversion equipment without intermediate conversion to AC, high-efficiency power electronic conversion, and conversion of AC power input to DC power output. It can solve problems such as efficiency and power density limitations, and achieve good performance. characteristics, increased power density, and the effect of a wide buck gain adjustment range

Active Publication Date: 2021-01-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, a step-down PFC circuit based on a resonant switched capacitor converter provided by the present invention solves the problem of limitation of efficiency and power density in the prior art

Method used

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  • Buck PFC circuit based on resonant switched capacitor converter
  • Buck PFC circuit based on resonant switched capacitor converter
  • Buck PFC circuit based on resonant switched capacitor converter

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Embodiment Construction

[0039] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0040] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0041] Such as figure 1 As shown, a step-down PFC circuit based on a resonant switched capacitor converter, including a rectifier bridge connected to an AC voltage source, an input filter inductor L 1 , Input filter capacitor C 1 , switch tube S 1 , switch tube S 2 , Resonant inductance L r1 , ...

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Abstract

The invention discloses a buck PFC circuit based on a resonant switched capacitor converter, belongs to the field of power electronics, breaks through the gain limitation when the traditional resonantswitched capacitor converter is applied to a PFC circuit so as to show good performance of power factor correction and the like, and achieves high efficiency and high power density in combination with the advantages of the resonant switched capacitor converter, so that the resonant switched capacitor converter has high application value in occasions with high requirements for the size and the efficiency of the converter, such as a power adapter of portable equipment, and the like.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a step-down PFC circuit based on a resonant switched capacitor converter. Background technique [0002] With the development of new energy vehicles, consumer electronics and portable devices, people put forward higher requirements on the performance of power adapters in terms of power density, input and output range, etc. The power adapter needs to meet certain harmonic standards when connected to the power grid, so the PFC (power factor) circuit is often used as the front-end circuit in the power adapter. Usually, a PFC circuit is constructed by a PWM converter. However, the hard switching characteristic of the PWM converter is not conducive to improving the conversion efficiency. At the same time, the existence of large inductance in the PWM converter greatly limits the power density of the converter. Therefore, in some applications requiring high efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42H02M3/04H02M3/07H02M7/04H02M7/217
CPCH02M3/04H02M3/07H02M1/4241H02M7/04H02M7/217H02M7/2176H02M1/4291Y02B70/10
Inventor 陈章勇韩雨伯刘翔宇吴云峰冯晨晨
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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