Vector controlled induction motor drive with a self-commissioning scheme

Different vector controlled structures are discussed, and their suitability for an economical and reliable industrial drive system is explored. The design of compact control hardware, comprising an 80196 microcontroller and an application-specific IC (ASIC) for generating pulse-width-modulation (PWM) signals is derived. The drive system can be configured from a host computer or a hand-held servicing unit through a serial data link. Monitoring and diagnostic functions are included. A self-commissioning scheme permits the setting of the parameters for optimum dynamic performance of the induction motor. Various oscillograms demonstrate the behaviour of the vector controller operating a 25 kVA PWM inverter