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

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5 Author(s)
Morimoto, S. ; Dept. of Electr. Eng., Osaka Prefectural Univ., Sakai, Japan ; Hatanaka, K. ; Tong, Y. ; Takeda, Y.
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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

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Industry Applications, IEEE Transactions on  (Volume:29 ,  Issue: 2 )