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Volume : III, Issue : XI, December - 2013 A New Torque Control Method for Torque Ripple Suppression in BLDC Motor With Nonideal Back EMF YANDAMURI HARIBABU AND V.V. NARASIMHA MURTHY Published By : Laxmi Book Publication Abstract : To improve the accuracy of speed and stabilization of the brushless direct current motor, a comprehensive analysis for the reason of electromagnetic torque ripples of BLDC motor with nonideal back electromotive force (EMF) drives in both the commutation and conduction regions is presented. A new automatic torque control method with a current control rule to control phase current is proposed. A new pulse width modulation technique “PWM_ON_PWM” scheme, which eliminates the diode freewheeling of inactive phase will be designed. The duty cycle of this PWM is regulated by measuring the wave function of back EMF. PI controller is used for speed regulation. Simulation results are given to show the comparison between HIGH_PWM_L_ON scheme and proposed PWM_ON_PWM scheme, the proposed method can reduce the torque ripple effectively and improve the stabilization and speed precision as well. Keywords : Article : Cite This Article : YANDAMURI HARIBABU AND V.V. NARASIMHA MURTHY, (2013). A New Torque Control Method for Torque Ripple Suppression in BLDC Motor With Nonideal Back EMF. Indian Streams Research Journal, Vol. III, Issue. XI, http://oldisrj.lbp.world/UploadedData/3418.pdf References : - Jiancheng Fang, Haitao Li, and Bangcheng Han, “Torque Ripple Reduction in BLDC motor with Nonideal back EMF ,“ IEEE Tans. Power Electron., vol. 27 ,no.11 , pp.4630-4637 Nov. 2012.
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