Prediction of the turn-to-turn voltages in parallel connected wires configuration for motor coils fed by steep fronted pulses

This paper proposes an original method for the design assistance of high reliability windings for machines fed by PWM inverters. The method is able to calculate the winding turn-to-turn maximum voltage stress for any combination of the positions of the wires in the stator slot. This kind of tool makes it possible the computation of an optimized coil with the best wire arrangement in the slot. The developed tool is used to compare many configurations for the coils by changing the number of parallel connected wires while preserving a constant copper section.