Staggered PFC circuit fault detection method and device

A circuit fault and detection method technology, which is applied in the direction of electronic circuit testing, etc., can solve the problem of inability to effectively detect secondary phase interleaved PFC circuit faults, and achieve the effect of avoiding abnormal operation and effective detection

Inactive Publication Date: 2018-05-29
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The embodiment of the present invention provides a fault detection method and device for an interleaved PFC circuit to at least solve the technical problem in the related art that the failure of the secondary phase interleaved PFC circuit cannot be effectively detected

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  • Staggered PFC circuit fault detection method and device
  • Staggered PFC circuit fault detection method and device
  • Staggered PFC circuit fault detection method and device

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Embodiment Construction

[0021] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part 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 making creative efforts shall fall within the protection scope of the present invention.

[0022] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...

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Abstract

The invention discloses a staggered PFC circuit fault detection method and device. The staggered PFC circuit comprises a main phase PFC circuit and an auxiliary phase PFC circuit, the method comprisesthe following steps: acquiring the current value of a to-be-detected auxiliary phase PFC circuit; determining whether the current value of the to-be-detected auxiliary phase PFC circuit is lower thana preset current threshold value; and when it is determined that the current value of the to-be-detected auxiliary phase PFC circuit is lower than a preset current threshold value, determining that the to-be-detected auxiliary phase PFC circuit has a fault. The technical problem that in the prior art, the fault of the auxiliary phase staggered PFC circuit cannot be effectively detected is solved.

Description

technical field [0001] The invention relates to the field of circuit detection, in particular to an interleaved PFC circuit fault detection method and device. Background technique [0002] In related technologies, interleaved PFC circuits are widely used, especially in applications where loads (such as transformers, motors, etc.) require high voltage and high power. Whether the PFC circuit can operate normally directly affects the reliable operation of the subsequent load. The PFC circuit generally includes the main and auxiliary two-phase control circuits. If the main phase PFC circuit or the auxiliary phase PFC circuit works abnormally, it will affect the operation of other loads. If the auxiliary phase PFC circuit is abnormal, it will cause all power to be controlled by the main phase. The consumption of the phase PFC will lead to the damage of the main phase PFC due to overheating. At present, there is no relevant detection operation for the use of the interleaved PFC ci...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/28
Inventor 周伟陶梦春张杰添
Owner GREE ELECTRIC APPLIANCES INC
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