Prediction of additional power and iron losses of inverter fed asynchronous induction machines of traction drives

Additional losses of asynchronous induction machines utilized in traction drives caused by the inverter have a great impact of the thermal behaviour of such machines. Due to the different design strategies of such machines compared against commonly used standard machines, an accurate modelling and evaluation of these additional losses is a very important task in particular with both tender phase as well as electromagnetic and thermal initial design of these machines. Based on detailed measurement data from already built machines, a fast and reliable calculation method of these additional losses suitable for the initial design of new machines will be developed.