Reduction method based on looped slot wedges for end to end shaft voltage in inverter driven IPM motor

Common mode voltage of the inverter output create a leakage current in the stator. It creates a net magnetic flux link with the shaft and induces an electromotive force (EMF) in between the two ends of the rotor. This EMF generates a current through two bearings and reduces its lifetime. In this study, we propose a frequency selective low impedance path to dissipate the EMF in the shaft. Finally, end to end shaft voltage can be reduced by dissipate the EMF in the rotor.