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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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

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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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[0025] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, and cannot 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. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and are not intended to limit the invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplificat...

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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...

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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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