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In order to reduce the torque ripple of position-sensorless brushless DC motor (BLDCM), Based on analyzing the commutation process, a novel control system employing back-EMF method was designed, which disconnected the reference point of detection circuit from battery cathode and did the phase-shifting compensation of back-EMF. Moreover, through regulating the terminal voltage of motor, the system...
Based on analyzing the principle of position- sensorless control for brushless DC motor (BLDCM), a control system employing back-EMF method was designed for the position-sensorless electric vehicle (EV). In order to eliminate the influence on back-EMF detection circuit from motor neutral point and RC filter, the system disconnected the reference point of detection circuit from battery cathode, and...
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