Comparative analysis of field oriented control of BLDC motor using SPWM and SVPWM techniques

In this paper, the comparative performance analysis of Field oriented control (FOC) of Permanent magnet brushless DC (PMBLDC) motor using sinusoidal pulse width modulation (SPWM) and space vector pulse width modulation (SVPWM) techniques is presented. The primary focus of using field oriented control for motor is to control the motor parameters in d-q axes along with sinusoidal and space vector modulated pulses for voltage source inverter driving the BLDC motor. This vector control method improves the system performance along with high efficiency and low torque ripple thus making it suitable for finding applications in high performance variable frequency drives. The sensor less approach for rotor position sense provides an advantage of cost reduction with ease of implementation using digital signal controllers (DSCs) and microprocessors. The analysis of the system is realized using MATLAB/SIMULINK program. The simulation results show that the SVPWM based system has superior performance compared to SPWM system.