An Efficient FPGA Based Scalar V/f Control Mechanism of Three Phase Induction Motor for Electric Vehicles

Electric motors more specifically induction motors are the key ingredients of the modern industry for various control applications and are responsible for considerable power consumption. The cost incurred on the energy consumption of induction motors can be mitigated to a greater extent by optimizing motor control. Since the motors are not always required to run at their rated speed, so considerable saving can be made if the motor is allowed to run at a speed below the rated speed, depending upon the load requirements. This is usually achieved by the use of adjustable speed drives or variable frequency drives that offers smooth control of speed, torque and various other soft starting features. Efficient performance and control of induction motor can be achieved by the utilization of advance control strategies, fast performance controllers and PWM converters. In this study, open loop scalar v/f control of three phase induction motor is implemented using high performance FPGA integrated with LABVIEW. Comparative analysis of Sinusoidal Pulse Width Modulation (SPWM) and Space Vector Pulse Width Modulation (SVPWM) is presented using MATLAB/ SIMULINK. The results show the effectiveness of SVPWM over SPWM.