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Comparison of concentrated winding topologies considering transient voltages in the winding system of inverter-driven low-voltage machines

Pauli Florian, Driendl Niklas, Mönninghoff Sebastian, Hameyer Kay

Archives of Electrical Engineering

2022

Vol. 71, nr 4

865--880

To reduce the losses of the power electronic inverter, the voltage slew rate (d u/d t) of the electric motors supplying voltage is increasing. As steep voltage slopes excite high frequencies in the megahertz range, transient phenomena in the winding of the electrical machine occur. To design the insulation system, the maximum electric potential difference between the conducting elements must be predicted. General design rules can lead to a significant overengineering of the interturn insulation, particularly when considering smaller stators with a known wire distribution. Therefore, two different winding topologies are studied comparing the voltage distribution in a round-wire winding and a winding with preformed coils.