α-β坐标系下瞬时无功功率型异步电机转子故障诊断

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Abstract The instantaneous reactive power’s expression of the squirrel-cage asynchronous motor is based on the instantaneous reactive power theory of the two-phase static coordinate, which is derived on the condition of normal motor, broken bar, rotor eccentricity and the rotor composite fault. Meanwhile, the fault characteristic frequency components are extracted, which are effectively exempted to be drowned easily by the base wave frequency. The fault characteristic frequency is identified easily and the purpose of the diagnosis of motor is achievable. The approach separates characteristic frequency of the rotor composite fault. Lastly, using double Hilbert transformation, DC component in reactive power was eliminated, which is helpful to emphasize the fault characteristic frequency. The stator current and voltage were collected by the experiment and the instantaneous reactive power was obtained by the theory of the coordinate transformation. The approach has been successfully verified by spectrum analysis of experimental results.

Key words： α-β two-phase static coordinates instantaneous reactive power theory the squirrel- cage asynchronous motor the rotor composite fault double Hilbert transformation spectrum analysis

Published: 29 June 2015

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TM307

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	Wang Zhen
	Li Cheng
	Xu Yunzhi
	Dai Xianliang

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Wang Zhen,Li Cheng,Xu Yunzhi等. Rotor Fault Diagnosis of Squirrel Cage Asynchronous Motor Based on Instantaneous Reactive Power in α-β Coordinates[J]. Transactions of China Electrotechnical Society, 2015, 30(10): 179-186.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I10/179

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