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Parallel Sensorless Speed Control using Flux-axis Current for Dual SPMSMs Fed by a Single Inverter
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 Title & Authors
Parallel Sensorless Speed Control using Flux-axis Current for Dual SPMSMs Fed by a Single Inverter
Kim, Chang-Bum; Yun, Chul; Yoon, Byung-Keun; Cho, Nae-Soo; Kwon, Woo-Hyen;
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This paper proposes a sensorless speed control algorithm for parallel-connected dual Surface-mounted Permanent Magnet Synchronous Motors (SPMSMs) fed by a single inverter. For stable parallel operation of synchronous motors with a single inverter, each motor has to be constantly kept in the synchronization state regardless of load torque. If the master motor with the larger load is controlled, the synchronous state will be maintained. Therefore, detection of the master motor is essential. Conventionally, the master motor is determined by comparing the rotor position error from the relation between the back-EMF for torque angle and the flux position; consequently, the position sensor is deemed essential for finding the rotor position. The parallel sensorless speed control method proposed in this paper uses no position sensor, instead it compares the flux-axis current from the connection between the back-EMF for torque angle and current in unbalanced load conditions. The results of simulation and experiment conducted verify the efficacy of the proposed method.
Dual SPMSMs;SIMM;Select control;Sensorless speed control;
 Cited by
단일 인버터 기반 에어컨용 실외기 팬 모터 병렬운전에서의 무효전력보상기를 이용한 맥동저감 기법,윤철;권우현;조내수;

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