FPGA based Space Vector PWM Control IC for Three Phase Induction Motor Drive

In conventional digital motor controllers, the PWM gating signal generation, current control loop for stator current regulation, dead time generation and other computational tasks requires high sampling rate to achieve wide bandwidth performance. To relieve the controller from the time consuming computational task of PWM signal generation, a novel method of Space Vector PWM signal generation is implemented in FPGA using Hardware description language VHDL. The designed space vector PWM control IC has been simulated using a single FPGA from Xilinx, inc. The output fundamental frequency can be varied from 1.46 Hz to 1.5 kHz and the PWM switching frequency can be set from 195 Hz to 49.92 kHz. The delay time of PWM output is programmable and the SVPWM control IC is reprogrammable.