PFC converter control method, device and frequency conversion electric appliance

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

Active Publication Date: 2018-10-12
HISENSE (GUANGDONG) AIR CONDITIONER
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  • Abstract
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  • Claims
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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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  • PFC converter control method, device and frequency conversion electric appliance
  • PFC converter control method, device and frequency conversion electric appliance
  • PFC converter control method, device 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 present invention provides a PFC converter control method, device, and frequency conversion electrical appliance, wherein the method includes: controlling the PFC converter to generate a frequency offset function whose frequency offset value changes periodically with time, and the frequency offset function Superimposed on the carrier reference frequency of the PFC converter, the periodically changing PFC carrier frequency function is obtained, the phase of the mains voltage signal is detected, and the PFC carrier frequency corresponding to each frequency point of the PFC carrier frequency function is controlled to follow the phase of the mains voltage signal. The periodic change effectively reduces the highest interference power spectrum amplitude detected during the test, realizes the purpose of reducing the electromagnetic interference level in high-frequency PFC technology, and reduces the power consumption of the PFC converter.

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 Patents(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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