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Power factor correction circuit, control method and controller

A power factor correction and power factor technology, applied in the field of power electronics, can solve problems such as lack of versatility, and achieve the effect of improving power factor and system efficiency

Active Publication Date: 2019-03-05
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Capacitive current compensation needs to be pre-set and calculated in a targeted manner, which is not universal

Method used

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  • Power factor correction circuit, control method and controller
  • Power factor correction circuit, control method and controller
  • Power factor correction circuit, control method and controller

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Embodiment Construction

[0043] 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.

[0044] 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.

[0045] 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

A power factor correction circuit, control method and controller are disclosed, by adjusting the current reference signal according to the measured power factor, the phase change of the input alternating current caused by the electromagnetic interference filter can be compensated, and the power factor can be maximized, thereby eliminating the need for Pre-calculation and design of specific EMI filter parameters can effectively improve the power factor and improve system efficiency.

Description

technical field [0001] The invention relates to power electronics technology, in particular to a power factor correction circuit, a control method and a controller. Background technique [0002] Power Factor (PF) is the cosine of the phase difference between voltage and current, and can also be expressed as the ratio of effective power to apparent power. Power factor is a parameter used to measure the power efficiency of electrical equipment, and low power factor represents low power efficiency. By performing power factor correction (Power Factor Correction, PFC) operation, the phase difference between voltage and current can be eliminated or reduced, thereby improving the power factor of the system, improving the transmission efficiency of active power, and improving the grid environment. [0003] Active power factor correction circuits usually rely on fast closed-loop adjustment of the input current, so that the input current can track the sinusoidal AC input voltage in r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42H02M1/44H05B44/00
CPCH02M1/4208H02M1/4225H02M1/44H05B45/3725Y02B70/10Y02P80/10
Inventor 赵晨王兆丰黄晓冬
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD