Influence of the Shielding Winding on the Bearing Voltage in a Permanent Magnet Synchronous Machine

This article presents selected methods of limiting the bearing voltages synchronous machines with permanent magnets supplied from power electronic converters. The authors analyzed based on use various shielding windings placed in slot wedges and mounted stator end-winding region. values parasitic capacitances machine, which levels depend, were determined using finite element method. Three-dimensional simulation models used for calculations. analysis influence voltage waveforms was conducted basis circuit two- three-level obtained calculation results indicate a high potential voltages.