Abstract - The paper describes a HF equivalent circuit
for the stator winding of three-phase AC motors, valid in a wide
frequency range. The model fitting is based on winding complex
impedance measurements. Both the phase-to-phase and the
phase-to-ground impedances are considered. The proposed model can
be utilized in theoretical and numerical HF analysis of inverter-fed
AC motors. In this case, the equivalent circuit allows to predict
both differential- and common-mode conducted EMI. Furthermore, also
transient effects can be predicted when the analysis is performed in
the time domain. The numerical results, obtained by means of PSpice,
are compared with the corresponding experimental tests in both
frequency and time domains.