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Control method and apparatus for PFC (power factor correction) converter, and frequency conversion electric appliance

A converter control and converter technology, applied in the fields of PFC converter control methods, frequency conversion electrical appliances, and devices, can solve problems such as unsatisfactory noise reduction effects, and achieve the purpose of reducing the maximum interference power spectrum amplitude, reducing electromagnetic radiation, and saving costs. Effect

Active Publication Date: 2016-09-21
HISENSE (GUANGDONG) AIR CONDITIONER
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] The present invention provides a PFC converter control method, device and frequency conversion electrical appliances to solve the problem of unsatisfactory noise reduction effect existing in the existing method of reducing electromagnetic interference by enhancing hardware EMC circuit design

Method used

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  • Control method and apparatus for PFC (power factor correction) converter, and frequency conversion electric appliance
  • Control method and apparatus for PFC (power factor correction) converter, and frequency conversion electric appliance
  • Control method and apparatus for PFC (power factor correction) converter, and frequency conversion electric appliance

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0038] In the frequency conversion controller of frequency conversion electrical appliances, the power factor correction (Power Factor Correction, referred to as PFC) circuit is a key functional unit circuit, which can improve the power factor of the frequency conversion controller, meet the requirements of international standards for harmonic curr...

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Abstract

The invention provides a control method and apparatus for a PFC (power factor correction) converter, and a frequency conversion electric appliance. The control method comprises the steps of controlling the PFC converter to generate a frequency deviation function, wherein the frequency deviation value is periodically changed along with time; overlaying the frequency deviation function to the carrier wave reference frequency of the PFC converter to obtain a periodically-changed PFC carrier wave frequency function; detecting the phase of a mains supply voltage signal; and controlling the PFC carrier wave frequency corresponding to each frequency point of the PFC carrier wave frequency function to be periodically changed along with the phase of the mains supply voltage signal. Therefore, the maximum interference power spectrum amplitude detected in the test process is effectively lowered, the purpose of lowering the electromagnetic interference level in the high-frequency PFC technology is achieved, and the power consumption of the PFC converter is lowered.

Description

technical field [0001] The invention relates to the technical field of home appliance control, in particular to a PFC converter control method, device and frequency conversion electrical appliances. Background technique [0002] Power Factor Correction (PFC for short) technology can change the power factor of the frequency conversion controller, reduce the harmonic current existing in the frequency conversion product, and reduce the harm caused by the harmonic current. Among them, the software high-frequency PFC technology based on single-chip microcomputer control has been widely used. The carrier modulation technology with a fixed carrier frequency is used, so that the related interference spectrum generated is concentrated near the high-order harmonic frequency of the carrier frequency, and the power spectral density is relatively concentrated. The power spectral density is high, and the electromagnetic interference generated is serious, and the scheme of suppressing inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/44H02M1/42
CPCH02M1/4208H02M1/44H02M1/12H02M7/48Y02B70/10H02M1/0009G01R19/175
Inventor 王斌
Owner HISENSE (GUANGDONG) AIR CONDITIONER
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