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Control method and device for staggered PFC (positive feedback circuit) of air conditioner

A control method and control device technology, applied in the direction of output power conversion devices, electrical components, high-efficiency power electronic conversion, etc., can solve problems that affect the reliable operation of air conditioners, cannot work normally in interleaved PFC circuits, and are prone to failures. To achieve the effect of improving reliability, extending working hours and ensuring reliable operation

Active Publication Date: 2015-05-06
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

This will have the following two problems: (1) When the main branch in the interleaved PFC circuit is open, the main branch cannot be opened, because the main branch is abnormal, even if the auxiliary branch is normal, the entire interleaved PFC cannot be opened. The PFC circuit continues to work normally; (2) Because the working time of the main branch is longer than the working time of the auxiliary branch, and even far longer than the working time of the auxiliary branch under certain conditions, the main branch and the auxiliary branch The difference in the workload of the main branch makes the main branch more prone to failure than the auxiliary branch, which affects the reliable operation of the entire air conditioner

Method used

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  • Control method and device for staggered PFC (positive feedback circuit) of air conditioner
  • Control method and device for staggered PFC (positive feedback circuit) of air conditioner
  • Control method and device for staggered PFC (positive feedback circuit) of air conditioner

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Embodiment Construction

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0026] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicat...

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Abstract

The invention discloses a control method for the staggered PFC of an air conditioner. The staggered PFC comprises a main branch and an auxiliary branch. The control method comprises the following steps of S1, detecting the current working states of the main branch and the auxiliary branch, and reading the set states of the main branch and the auxiliary branch, which are stored inside a storage; S2, according to the current working states and the set states of the main branch and the auxiliary branch performing switching control on the main branch and the auxiliary branch. The control method for the staggered PFC of the air conditioner can help automatically switch the main branch and the auxiliary branch of the staggered PFC, prolongs the service time of the staggered PFC and improves the reliability of the air conditioner. The invention also discloses a control device for the staggered PFC of the air conditioner.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a control method for an interleaved PFC (Power Factor Correction, power factor correction) circuit in an air conditioner and a control device for an interleaved PFC circuit in an air conditioner. Background technique [0002] At present, the interleaved PFC circuit on the inverter air conditioner has two branches of inductance. According to the input voltage and load current, when certain conditions are met, one of the branches will be opened first. This branch is usually called the main branch. After meeting certain conditions, another branch will be opened, which is usually called a sub-branch; then the sub-branch will be closed if certain conditions are met, and the main branch will be closed if certain conditions are met. [0003] In the existing control, the main branch and the auxiliary branch are fixed. Once it is determined which branch is the main branch and whi...

Claims

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Application Information

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IPC IPC(8): H02M1/42
CPCH02M1/42Y02B70/10
Inventor 于光张国柱朱慧君
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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