Abstract：Through analyzing the commutation process of the permanent magnet brushless dc motor, the expression of pulsating torque that generated by motor winding current commutation is obtained. In order to verify the correctness of theoretical analysis, the pulsating torque and related characteristics are simulated, then the pulsation torque on shaft was measured with the permanent magnetic rotation angular acceleration sensor, the objective existence of pulsating torque in output torque and related features are verified. For pulsating torque, a torque ripple suppression method based on peak and valley complementary was proposed, and the corresponding experimental platform was set up, the theoretical analysis and experimental measurement obtained the consistent results, so the correctness of the proposed suppression method is verified.
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2019, Vol. 40 
