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AC-DC power converter

A DC power and converter technology, which is applied in the direction of converting AC power input to DC power output, output power conversion device, high-efficiency power electronic conversion, etc., can solve the problems of complex control and high cost, achieve low device stress and improve efficiency , High energy conversion efficiency

Active Publication Date: 2019-01-11
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a method to solve the problem of complex control or high cost in the prior art

Method used

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  • AC-DC power converter
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Embodiment Construction

[0040] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. In order not to obscure the essence of the present invention, well-known methods, procedures, procedures, components and circuits have not been described in detail.

[0041] Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0042] Meanwhile, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one element or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" another eleme...

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Abstract

The invention discloses an alternating current. A DC power converter comprise a two-stage power level circuit, a power switch and a control circuit, wherein that two-stage power level circuit can realize the energy transmission proces; furthermore, the energy storage capacitor is charged by the front-stage power circuit, and at least a part of the DC input energy is directly transmitted to a loadthrough a power conversion of the back-stage power circuit, thereby improving the efficiency; In addition, when the DC input voltage is smaller than the voltage on the energy storage capacitor, the power circuit of the subsequent stage supplies power to the load by acquiring the energy on the energy storage capacitor, so that the AC of the present invention can be realized. DC power converter hasthat advantage of low output ripple, high energy conversion efficiency and low device stress, and PF is optimized.

Description

technical field [0001] The present invention relates to a power electronic technology, more specifically, relates to an AC-DC power converter applied in a switching power supply. Background technique [0002] An AC-DC power converter (AC / DC converter) is used to convert an AC voltage into a constant DC signal (such as DC voltage or DC current). Due to the high power of the AC-DC power converter, it is widely used to drive high-power loads, such as motors and LED lights. An AC-DC power converter usually includes a rectifier bridge to convert an external AC voltage into a half-sine wave DC input voltage for subsequent conversion circuits. In order to reduce the harmonic pollution to the AC power grid, the AC-DC power converter usually needs a power factor correction circuit (PFC) to realize the power factor correction function and obtain a higher power factor. [0003] In the prior art, both the two-stage conversion circuit or the single-stage conversion circuit can realize ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M1/14
CPCH02M1/14H02M7/217H02M1/4225H02M1/4258H02M1/4208Y02B70/10H02M1/4291H02M7/043
Inventor 黄秋凯邓建
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD