Validation of a slot-based High-Frequency Model of a Hairpin Winding Stator in Time-Domain

The winding insulation system of inverter-fed electrical machines is exposed to electrical stress due to unpredictable transient overvoltages. Based on previous works, the present study validates a slot-based HF-hairpin stator lumped parameter model in time domain by transient voltage excitation. Further, different winding schemes were investigated concerning the voltage distribution within the windings. Special interest is given to the behavior at very high frequencies above the resonance frequency. Additionally, an advantageous winding scheme concerning the voltage propagation was identified.