Yoshitaka Kawabata, Yoshihisa Morine, Toshihisa Oka, Emenike C. Ejiogu and Takao Kawabata. New Stand-alone Power Generating System Using Wound-Rotor Induction Machine. Proceedings of the Fourth International Conference on Power Electronics and Drive Systems. 2001. Bali, Oct. 2001, Vol.1, pp.335-341.
Yoshitaka Kawabata, Motoshi Nasu, Emenike C. Ejiogu and Takao Kawabata. High Efficiency Vector Control System Using Open-Winding Motor and Two Space Vector Modulated Inverters. Proceedings of the 9th European Conference on Power Electronics and Applications, in Graz. 2001. Graz, Sept. 2001, No.671. No.671.