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Multi-channel pfc circuit and air conditioner

A circuit and control circuit technology, applied in the field of PFC, can solve problems such as PFC branch circuit overload, PFC failure, etc.

Active Publication Date: 2020-10-09
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to propose a multi-channel PFC control circuit, aiming to solve the technical problem that the failure of a single PFC in a multi-channel PFC circuit causes the remaining PFC branches to overload

Method used

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  • Multi-channel pfc circuit and air conditioner
  • Multi-channel pfc circuit and air conditioner
  • Multi-channel pfc circuit and air conditioner

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Embodiment Construction

[0035] 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 part of the embodiments of the present invention, not all of them. 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.

[0036] In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at leas...

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PUM

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Abstract

The invention discloses a multipath PFC circuit and an air conditioner. The multipath PFC circuit includes a power input end, a power output end, multiple PFC branches, a PFC control circuit and a clamp circuit, wherein the multiple PFC branches are connected in parallel between the power input end and the power output end, the PFC control circuit has a soft start end, and the clamp circuit is connected with the soft start end of the PFC control circuit. The magnitude of output currents of the multiple PFC branches is controlled correspondingly by the PFC control circuit according to a voltageof the soft start end, when the voltage of the soft start end is greater than or equal to a preset protection voltage, the voltage of the soft start end is clamped to a preset fixed voltage, and thepreset fixed voltage is lower than the preset protection voltage. The multipath PFC circuit is advantaged in that a technical problem of overload of residual PFC branches caused by failure of a singlePFC branch in the multipath PFC circuit is solved.

Description

technical field [0001] The invention relates to the technical field of PFC, in particular to a multi-channel PFC circuit and an air conditioner. Background technique [0002] In the interleaved parallel PFC (Power Factor Correction) circuit in the prior art, each PFC tracks the same input source, and the switching frequency of each PFC tube is the same, and the carrier phase shifts by 120 degrees. It has the above technical characteristics circuit can reduce the input and output current ripple. In such a circuit, when a single point of failure occurs in a single PFC, that is, a failure problem, the remaining PFCs need to bear the power of the failed PFC. When the interleaved parallel PFC circuit is a three-way PFC, if one of the PFCs fails, the remaining two PFCs need to bear 1.5 times the overload. When the interleaved parallel PFC circuit has two PFCs, if one of the PFCs fails, the remaining PFC needs to bear twice the overload. Contents of the invention [0003] The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42
CPCH02M1/42Y02B70/10
Inventor 杨建宁章文凯
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD