Propagation of inverter surge and voltage distribution in motor winding

A new simulation technique was developed, which allows the estimation of motor winding voltages in inverter motor system. We developed a cable surge analysis method that takes into account the frequency‐dependent effect of the dielectric characteristics of the cable insulator and mutual induction between cable wires. A motor winding model that takes into consideration the frequency‐dependent effect of winding impedance and mutual coupling between slots is also proposed. With the simulation technique, motor winding voltages driven by an inverter are investigated, including propagation characteristics of a cable connecting the motor and the inverter. The accuracy of the proposed model is confirmed to be satisfactory enough for the estimation of winding voltages by comparisons between measured and calculated results. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 161(4): 70– 79, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20549