中国电机工程学报Issue(33)：95-105,11.
并网永磁同步发电机转子永磁体局部失磁特征量的计算与分析
Calculation and Analysis on the Permanent Magnet Partial Demagnetization Characteristics of the Grid-connected Permanent Magnet Synchronous Generator Rotor
摘要
Abstract
For the permanent magnet partial demagnetization on the permanent magnet synchronous generator rotor due to the high temperature, the large armature current and the vibration, the demagnetization characteristics were investigated on the permanent magnet synchronous generator with the parameters of 1.5 MW, 32 poles, 4 parallel branches and fractional slot. Firstly, the mathematical model of the 2D transient electromagnetic field was established under asymmetric operation, and the electromagnetic fields in the normal operation and the different degree demagnetization operations are calculated respectively by using field-circuit coupled step finite element method. Secondly, the electromagnetic field distributions before and after the permanent magnet demagnetization, the variation trajectory of the flux density in different location points, the harmonic values of the air-gap, the EMF waveform and the current waveform of the each branch were studied, and the demagnetization characteristics could be obtained, which could provide a theoretical basis for the online monitor and diagnosis of the permanent magnet synchronous generator. Finally, by the comparison of the calculation results and the test data of a 400 W, 10 poles permanent magnet synchronous generator with the permanent magnet demagnetization, the rationality of calculation method could be verified.关键词
永磁同步发电机/失磁故障/多并联支路/不对称运行Key words
permanent magnet synchronous generator/permanent magnet partial demagnetization/multiple parallel branch/asymmetric operation分类
信息技术与安全科学引用本文复制引用
李伟力,程鹏,吴振兴,刘玉宝,邱洪波..并网永磁同步发电机转子永磁体局部失磁特征量的计算与分析[J].中国电机工程学报,2013,(33):95-105,11.基金项目
黑龙江省教育厅海外学人资助项目(1055HQ030)；黑龙江省科技厅留学归国人员基金(LC05C05)。Heilongjiang Overseas Scholars Funded Projects (1055HQ030) （1055HQ030）
Heilongjiang Province Returned Chinese Scholars Fund (LC05C05) （LC05C05）
