Electromagnetic parameters of a three phase transverse flux machine with an external rotor for wheel hub drives

The transverse flux machine with a permanent magnet excited rotor is one of the most important machine topology for the application with electric driven vehicles. In particular with wheel hub drive systems, the design of such a machine with an external rotor is favourably against conventional induction machines due to the high output torque in conjunction with low heat losses. The paper discusses 3D finite element analyses of a novel design of a three phase transverse flux machine with an external rotor. In order to setup an environment suitable for a prototype design of the single sided transverse flux machine, special attention has to be given to modelling as well as analysis methods. The results presented here are focussed on the most important electromagnetic parameters such as no-load voltages, short-circuit currents and electromagnetic torque.