Study on the technology of inverter based on DSP and SPWM

This paper introduces a SPWM inverter to output the high precision three-phase SPWM through rule sampling method, based on TMS320LF2407A chip, by using comparison units on event manager. Simple circuit, easy programming, high quality and reliability of SPWM waveform, and output waveform of the variable frequency, all can well meet the requirements of VVVF inverter system, and achieve more easily. Test results prove that the system is running stablely, has small harmonic coefficient and a certain practical value.