Characteristics of Bridgeless Boost Converter Fed Bldcm and Improvement of Pf Under Different Loads

S. Swapna GRT Institute of Engineering and Technology, Tiruvallur, Tamil Nadu, India N. Shanmugasundaram Vels Institue of Science, Technology and Advanced Studies, Pallavarm, India Characteristics of Bridgeless Boost Converter Fed Bldcm and Improvement of Pf Under Different Loads

This chapter describes the Power Factor Correction (PFC) Bridgeless (BL) Boost converter fed BLDC motor drive as a cost-effective solution for low-power applications. A BL configuration of the boost converter is proposed, which offers the elimination of the diode bridge rectifier, thus reducing the conduction losses associated with it. A PFC BL boost converter is designed to operate in Discontinuous Conduction Mode (DICM) to provide an inherent PFC at mains by using the ANFIS-PID controller. The performance of the proposed drive is evaluated over a wide range of speed control and varying input supply voltages (universal mains at 90–230 V) with improved power quality at AC mains. The obtained power quality indices are within the acceptable limits of international power quality standards such as the IEC 61000-- -2. The performance of the proposed bridgeless boost converter fed BLDC motor drive is simulated in MATLAB/Simulink environment. The measured simulation results of THD are reduced to an optimum value of 2.51 for the 400V DC link. Also, the observed results are compared and used to improve the power factor unity according to the variation of the DC link voltage.
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