7Gieras Jacek F, Wang Chong, Joseph Cho Lai. Noise of Polyphase Electric Motors [ M ]. Boca Raton : CRC Press,2006 : 112 - 120.
8Ishibashi F, Karnimoto K, I-Iayashi T. Natural Frequency of Stator Core of Small Induction Motor[J]. IEE Proc. on Eleetrieal Power Application ,2003,150 (2) :210 - 214.
9Lundmark S K Tidblad, Hamdi E S. Designs of Claw-Pole Motors for Industrial Applieafions[ C ]. IEEE Transactions on Industry Application ,2006,111 - 115.
10Bao Xiaohua, et al. Research on the Mathematics Model and Pararneter Optimization of the Claw-pole Alternator[ C]. IEEE Trans- aetions on Industry Application ,2005,2005 - 2008.
