Design and study of novel transverse flux permanent magnet synchronous motor

The transverse flux permanent magnet synchronous machine (TFPM) is a novel machine arousing widespread concern in recent years. Achieving high torque density to save energy and rough material and reduce the volume and weight of the machine is the best features of TFPM. However, because of low power factor and complex manufacture technics, the application of TFPM is restricted. The dissertation is devoted to the study on TFPM in this paper. Power factor of TFPM is discussed in theory. The orientation to obtain high power factor is given. By comparing impact of different structure patterns on leakage flux, axial magnet is proved to be better to restrain leakage flux and enhance main flux. Impact of parameter variety on torque density is analyzed by comparing radial flux machine with transverse flux machine. A 5 kW TFPM prototype is developed. Power factor of prototype is 0.8. Torque density of prototype is about twice of common radial machine.