Adaptable speed control of Bridgeless PFC Buck-Boost converter VSI fed BLDC motor drive

This paper presents closed loop speed control of bridgeless (BL) power factor corrected (PFC) buck-boost converter fed brushless direct current (BLDC) motor. Variable speed and torque are the requirements for the present day dynamic types of loads used in industrial and domestic applications. The Utilization of BLDC in household applications is predominantly increasing due to its high efficiency, fast response, low inertia and low maintenance. Conventional scheme use diode bridge rectifier at the front end but the proposed single stage PFC converter not only eliminates the conventional system of bridge rectifier but also increases power quality at ac mains. The operational analysis of the proposed configuration is evaluated and simulated in PSIM environment.