Minimizing Torque ripple by using HCCwith PFCBased Cuk Converter-Fed BLDC Motor Drive

Pasupuleti Neelima, M. V.S.Prem Sagar

Abstract


The use of brushless dc motor (BLDC) in low-power appliances is increasing because of its features of high efficiency, wide speed range, and low maintenance. This paper deals with a power factor correction (PFC) based Cuk converter fed brushless DC motor (BLDC) drive as a cost effective solution for low power applications. The speed of the BLDC motor is controlled by varying the DC bus voltage of voltage source inverter (VSI) which uses a low frequency switching of VSI (electronic commutation of BLDC motor) for low switching losses. The switching losses in the VSI have been reduced by the use of fundamental frequency switching by electronically commutating the BLDC motor. Moreover, the speed of the BLDC motor has been controlled by controlling the dc link voltage of the VSI. Moreover, the bridgeless configuration of the Cuk converter offers low conduction losses due to partial elimination of diode bridge rectifier at the front end. Two control strategies for BLDC motor drive have been implemented. One of the control strategies is based on PFC-CUK converter fed BLDCM drive and another one is Hysteresis current controller converter fed BLDC motor drive. Comparison has been made between the two control strategies is PI and HCC in terms of minimize Torque ripple, Power factor for different operating speeds. The proposed work has been implemented under MATLAB/Simulink environment.


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