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A Power Factor Correction Converter

A power factor correction and converter technology, which is applied to output power conversion devices, high-efficiency power electronic conversion, climate sustainability, etc., can solve problems such as PFC dual-loop control, and achieve fast dynamic response, convenient debugging, and simple circuit implementation. Effect

Active Publication Date: 2022-02-11
HANGZHOU YOUTE POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a power factor correction converter to solve the defects of PFC double-loop control

Method used

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  • A Power Factor Correction Converter
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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] see Figure 1-5 As shown, the present invention is a power factor correction converter, including inductance L1, switch tube S1 and sampling resistor Rcs1 connected in sequence; switch tube S1 is connected in parallel with diode D1 and filter capacitor Co; wherein, connected by rectifier bridge DB1 , the output terminal of the rectifier bridge DB1 is connected to the inductor L1, the input terminal is connected to the sampling resistor Rcs1, the switch tube ...

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Abstract

The invention discloses a power factor correction converter, which relates to the technical field of converter design. The invention includes an inductance L1, a switch tube S1 and a sampling resistor Rcs1 which are connected in sequence; the switch tube S1 is connected in parallel with a diode D1 and a filter capacitor Co; and a control circuit, which includes a drive circuit and a frequency adjustment circuit, controls the input current to be It is substantially proportional to the input voltage; the frequency adjustment circuit is coupled to change the switching frequency of the switch S1 in response to the first signal, the second signal, and the third signal, and the drive circuit is regulated by the periodic signal to send out the switching frequency to the switch S1. , off command. Compared with the continuous mode power factor control of the double-loop control, the present invention has the advantages of simple circuit realization, convenient debugging and fast dynamic response.

Description

technical field [0001] The invention belongs to the technical field of converter design, in particular to a power factor correction converter. Background technique [0002] The AC-DC power supply of electrical equipment connected to the AC grid must meet the mandatory requirements of IEC61000-3-2 for current harmonics. For different equipment and applications, IEC61000-3-2 proposes Class A, Class B, Class C, and Class D current harmonic limit standards. [0003] The full name of PFC is Power Factor Corrector, which means a power factor corrector. The AC-DC power supply of the AC power grid adopts a double-loop control PFC, specifically as Image 6 As shown, it can improve the utilization rate of the power supply to the mains when AC is converted to DC, but it cannot reduce the power loss during the conversion process, and there is no function of saving power. The double-loop control logic is clear, but it has the following disadvantages: double-loop compensation The circuit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42
CPCH02M1/4225Y02B70/10
Inventor 毛昭祺
Owner HANGZHOU YOUTE POWER CO LTD