科研之友
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摘要
The power converter plays a very important role in switched reluctance motor (SRM) systems, and it is also a vulnerable part most prone to failures. Power converter faults will cause the motor to run in nonequilibrium states, and a long time fault operation will damage the motor and other modules, and make the system completely lose working stability. In the paper, an asymmetric half-bridge converter of SRM is used as the research object, and wavelet packet decomposition is made for phase currents. The short and open circuit faults of power switches are analyzed, and an energy discrete degree of the wavelet packet nodes is used as the fault characteristic. The types of power converter faults can be diagnosed and the fault arms can be found by judging the changes of the energy discrete degree of the wavelet packet nodes from phase currents before and after the fault. At last, the corresponding simulation and experimental analyses are made to verify the effectiveness and practicality of the proposed method.
- 出版日期2014
- 单位浙江大学
