SVPWM Based BLDC Motor Drive Using Modified Zeta Converterfor Power Factor Correction
Electric motor is an essential part of any electric system. Control of a motor improves its dynamic performance. Exesting motors are mostly conventionally used AC (Alternating Current) and DC (Direct Current). BLDC (Brushless DC) motors are more efficient than conventional motors and wide range of speed control applications. Due to these features it attracts attention of industrial, commercial and domestic consumers. This study describes SVPWM controlled BLDC motor drive for the improvement of power factor using modified zeta converter. The design comprises of AC voltage source connected to a full BR (Bridge Rectifier) feeding DC supply to modified zeta converter whose output voltage is controlled through PWM (Pulse Width Modulation) technique. The zeta converter is modified into DICM (Discontinuous Inductor Current Mode) converter. The voltage follower control is engaged for voltage control of the modified zeta converter. The modified zeta converter improves power factor upto 0.85 when controlled by PWM. The controlled output of modified zeta converter is served to a VSI (Voltage Source Inverter) which provides supply to a BLDC motor. The speed of BLDC is controlled through SVPWM (Space Vector Pulse Width Modulation) technique. The proposed scheme is designed and evaluated for improved speed control using MATLAB/Simulink platform.