K. Hatanaka

Variable Speed Drive System of Permanent Magnet Synchronous Motors with Flux-weakening Control

Yoji Takeda, Takao Hirasa, Y. Tong, 1992 .

Design and control system of inverter-driven permanent magnet synchronous motors for high torque operation

S. Morimoto, Takao Hirasa, Y. Tong, 1993 .

Servo drive system and control characteristics of salient pole permanent magnet synchronous motor

Shigeo Morimoto, Yoji Takeda, Takao Hirasa, 1993 .