Control of paralleled single-phase motors for a crop chopping machine

This article proposes a fuzzy control system for driving multiple single-phase induction motors in parallel connection. The drive system employs only a single PWM inverter controlled by a self-organizing fuzzy controller. This drive and control system has been utilized in an invented crop chopping machine. The article presents the control system concept, modeling of multiple motors in parallel connection, controller design, simulation of the closed-loop system and practical results. The control system stability is also analyzed on the basis of passivity theorem.