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Sensorless control via intelligent commutation tuning for brushless DC motor

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2 Author(s)
Chen, H.C. ; Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan ; Liaw, C.M.

An intelligent sensorless control strategy for a brushless DC motor (BDCM) is presented. The rotor position for making commutation is first roughly estimated by a proposed switching signal generation scheme using motor terminal voltages. Then an intelligent self-tuning strategy is developed to finely adjust the commutation instant for obtaining optimal torque generating capability. This is achieved by a simple but stable self-tuning algorithm to minimise winding currents at any instant. The effect of commutation instant on the BDCM operation capability is observed analytically and intuitively, and, accordingly, the proposed self-tuning strategy is established. The effectiveness of the proposed method is demonstrated experimentally

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:146 ,  Issue: 6 )