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Vector control of synchronous permanent magnet motors including stator iron loss

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3 Author(s)
T. Senjyu ; Ryukyus Univ., Okinawa, Japan ; T. Shimabukuro ; K. Uezato

To achieve the high-performance speed control of synchronous permanent magnet motors (PM motors), the influence of iron loss cannot be neglected as the driving frequency increases with high-speed operation. This paper presents a voltage equation and the vector control of PM motors including stator iron loss. The stator iron loss is introduced as an equivalent iron loss resistance in voltage equations on the assumption that the iron loss is produced in an equivalent eddy current winding on the d-q axis. The effect of the stator iron loss can be represented with equivalent iron loss resistance, which is inserted in series with exciting inductance. As the d-q axis flux interferes through the equivalent iron loss resistance, the electromagnetic torque is affected by the equivalent iron loss resistance. To achieve the vector control, the d-q axis is decoupled by nonlinear control voltages. As a result, the instantaneous torque control scheme is equal to that of DC machines and the torque control is simplified. The useful features and validity of the proposed control method are confirmed by computer simulations

Published in:

Power Electronics and Drive Systems, 1995., Proceedings of 1995 International Conference on

Date of Conference:

21-24 Feb 1995