PFC bus abnormity diagnosis and correction recovery circuit and method
A technology for restoring circuit and bus voltage, applied in electrical components, measuring electrical variables, measuring current/voltage, etc., can solve problems such as abnormal repair, system failure to diagnose problems, frequency conversion system not working properly, etc., to solve bus abnormalities problem effect
Active Publication Date: 2020-04-28
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
The input voltage of the AC side and the control condition of the Boost converter are strongly related to the bus voltage, and the abnormality of the bus will directly cause the frequency conversion system to fail to work normally
In the existing technology, the system cannot diagnose the specific cause of the problem when the bus voltage fluctuates in a short time and causes an abnormality, which brings certain difficulties to repairing the abnormality
In addition, PFC inductance parameter drift caused by air conditioning aging is also a common problem
Method used
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[0028] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.
[0029] Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art so that those skilled in the art to which the present invention pertains can easily practice. As can be easily understood by those skilled in the art to which the present invention pertains, the embodiments to be described later can be modified into various forms without departing from the concept and scope of the present invention. In the drawings, the same or similar parts are denoted by the same reference numerals as much a...
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The invention provides a PFC bus abnormity diagnosis and correction recovery circuit. Alternating current side voltage is boosted through a Boost circuit after passing through a rectifier bridge, sampled steamed bun waves generated after rectification are detected through a steamed bun wave detection circuit, the boosted bus voltage is detected by a bus voltage detection circuit, a driving circuitdrives an MOS transistor of the Boost circuit to be turned on and turned off, an information fusion processing module is used for judging a voltage feedback signal of the sampled steamed bun wave anda voltage feedback signal of the bus voltage, whether the bus voltage is abnormal or not is determined, when it is determined that the bus voltage is abnormal due to abnormal work of the Boost circuit, the information fusion processing module sends a signal to a feedback compensation correction module, and the feedback compensation correction module carries out parameter compensation in the positive direction and the negative direction. The invention also provides a PFC bus abnormity diagnosis and correction recovery method. Fault diagnosis can be performed when the bus voltage is abnormal, and parameter compensation correction recovery can be automatically realized in view of the problem of inductance parameter drift.
Description
technical field [0001] The invention relates to a diagnosis, correction and restoration circuit and method, in particular to a diagnosis, correction and restoration circuit and method for PFC busbar abnormality. Background technique [0002] PFC (power factor correction) power converter belongs to the high-order part of the rectifier circuit. As the core link of the inverter air-conditioning system, this technology can improve the current harmonics on the AC side, improve the power factor, and increase the DC bus voltage to improve the driving capability. . The input voltage of the AC side and the control condition of the Boost converter are strongly related to the bus voltage, and the abnormality of the bus will directly cause the frequency conversion system to fail to work normally. In the prior art, the system cannot diagnose the specific cause of the problem when the bus voltage fluctuates greatly in a short period of time and causes an abnormality, which brings certain...
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IPC IPC(8): H02M1/42H02J3/16G01R19/165
CPCG01R19/16576H02J3/16H02M1/4225Y02B70/10Y02E40/30
Inventor 谭必成潘高强朱晓蒙李东元朱超宇宋健
Owner GREE ELECTRIC APPLIANCES INC
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