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This paper presents the robust sensorless operation for brushless DC motors (BDCMs) loaded by the position- dependent load where the load torque is a function of the rotor angle (not electrical angle). Without any position sensor, the reliable position signals are generated from the motor terminal voltages through sensorless circuits. In order to reduce the speed variations especially in the low speed,...
Brushless DC motors (BDCM) possess higher efficiency than the conventional induction motors (IM) and thus, BDCMs have been widely used in the DC compressors. Since the conventional position sensors cannot work well in the hermetic compressors, many control method without position sensor for DC compressors have been proposed. The performance of DC compressors is improved after the proposed sensorless...
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