Induction Motor Optimised Supply Voltage and Frequency Control

Optimal induction motor control with respect to produce the highest torque with the minimal current is described in this paper. The first theoretical part derives the rotor current frequency at which such aim is reached. The highest torque depends however naturally on machine parameters. Rotor resistance depends on the temperature and rotor inductivity on machine current. The second part describes the laboratory measurements that were performed to specify these influences on a real induction motor.