Microprocessor control of a PWM inverter induction motor drive

Abstract

The practical implementation of a microprocessor control system for an induction motor drive is described. A three-phase transistor inverter feeds a 2 hp induction motor with a pulsewidth modulated voltage waveform having no harmonic component of lower order than the seventeenth. The motor operates in a controlled-slip mode and both constant torque and constant horsepower strategies are implemented.