Reduced sensor based improved power quality CSC converter fed BLDC motor drive

This paper deals with the CSC (Canonical Switching Cell) converter for speed control of BLDC (Brushless DC) motor drive with PFC (Power Factor Correction) and improved PQ (Power Quality) at input AC mains. The voltage of DC link capacitor of the CSC converter is controlled for varying the speed of the motor using a new approach of speed control using a single voltage sensor. The front-end CSC converter is used in DICM (Discontinuous Inductor Current Mode) hence a voltage follower approach is utilized for the speed control. A further reduction of Hall Effect position sensors is achieved by estimating the rotor position using a sensorless technique. The complete drive system is designed and modeled in MATLAB / Simulink environment for a speed control over a wide range, power factor correction and improved power quality at input AC supply.