Title :
Servo drive system and control characteristics of salient pole permanent magnet synchronous motor
Author :
Morimoto, Shigeo ; Hatanaka, Keita ; Tong, Yi ; Takeda, Yoji ; Hirasa, Takao
Author_Institution :
Dept. of Electr. Eng., Osaka Prefectural Univ., Sakai, Japan
Abstract :
Permanent magnet (PM) synchronous motors fed by PWM inverters are considered. PM motors sometimes have a saliency, in which the q-axis inductance is larger than the d-axis inductance. A high-performance servomotor drive system for a salient-pole PM motor is described. An armature current vector is actively controlled according to load conditions in order to use a reluctance torque effectively, and, as a result, a large torque can be produced. The control algorithm for the armature current vector is described, taking the demagnetization of the PM and the magnetic saturation into account. Characteristics such as torque, power factor, efficiency, power capability, transient responses, etc. are examined in detail by computer simulations and experimentally
Keywords :
adaptive control; control system analysis computing; digital simulation; electric current control; electric drives; electric machine analysis computing; invertors; machine control; machine testing; permanent magnet motors; pulse width modulation; servomotors; synchronous motors; PWM inverters; adaptive control; algorithm; armature current vector; control system analysis computing; d-axis; demagnetization; digital simulation; efficiency; inductance; machine control; machine testing; magnetic saturation; power capability; power factor; q-axis; salient pole permanent magnet synchronous motor; servomotor drive; torque; transient responses; Control systems; Inductance; Induction motors; Permanent magnet motors; Pulse width modulation inverters; Reluctance motors; Servomechanisms; Servomotors; Synchronous motors; Torque control;
Journal_Title :
Industry Applications, IEEE Transactions on
