Converter Dependent Design of Induction Machines in the Power range below 10MW

Parasitic effects caused by static frequency converters, like shaft voltages, insulation stress, additional losses, harmonic torque ripple or noise may endanger the reliable operation of drives or turbine shaft arrangements and diminish its lifetime. The optimal design of the converter depends mainly upon the driven process and the motor type. The converter size is given by the technical motor data. The chosen motor design depends on the driven process but on the chosen converter as well. Three main types of converters are applied to asynchronous machines in this power range. These three types are analysed in the light of the converter caused effects.