Starting control of wound-rotor induction motors by usingchopper-controlled resistance in rotor circuit

摘要

The improvement of startup transient performance of three-phasewound-rotor induction motors by using chopper-controlled resistance inthe rotor circuit was investigated. By properly controlling the dirtycycle of the chopper to adjust the equivalent rotor resistance, higheroutput torque with lower starting current can be obtained. To controlthe startup performance under several load conditions and systemrequirements, maximum torque operation and limited-current operationwere considered. The transient current, speed, and torque of theinduction motors were investigated by computer simulation, and numericalresults were verified by experimental tests