DSP based PWM generation for high switching frequency voltage source inverter

This paper presents real time implementation of DSP based PWM control algorithm for 3 phase 4-leg IGBT voltage source inverter. This method is also useful for application in voltage source inverters for adjustable-speed ac drives. PWM method is used to reduce the harmonic content in the output voltage applied to induction motor. The pulses were generated using Texas Instruments TMS 320F28335 DSP controller and that triggers the inverter. Results of input and output of the inverter were captured using Digital Storage Oscilloscope. The performance of DSP architecture allows an approach to reduce the complete system costs of digital motion control applications.