A closed-loop operation of super high-speed reluctance motor for quick torque response

The authors examine operating modes of the cageless reluctance motor and propose a new control method for quick torque response. It is shown that the control of sinusoidal phase current in magnitude with fixed current phase angle provides a simple means for achieving quick torque response and efficient operation. The flux linkage, current, torque. and the rated voltage of the inverter are calculated for a reluctance motor. A performance comparison is made between the proposed control method and the field-oriented control method. Analysis and computer simulation show that substantial improvements in dynamic response and efficiency are achieved for a reluctance motor when operated with constant current phase angle compared with operation at constant direct axis current or constant flux. Test data from a 24000 r/min. 1.3 kW reluctance motor drive system are provided