Methods to Decrease Turn-to-Turn Voltage of Motors Fed by Inverter Drives

In this paper, new methods to decrease voltage surges and the turn-to-turn voltages of motors are considered. By connecting additional cables and resistances between the motor and inverter terminals, the magnitude of voltage surges at the motor terminals decreases by 27%. By increasing the capacitances between motor windings, the magnitude of turn-to- turn voltages decreases by 50%. As a product of these results, reliabilities of inverter drive systems and surge capabilities of the motors increase.