Transverse flux machine for direct drive robots: modelling and analysis

This paper presents a new analytical model for high-torque and low-speed transverse flux machines with flux collecting permanent magnet type. The model is developed based on approximating the permeance in the air gap between rotor and stator using quasi-flux tubes with boundaries determined by straight lines and semicircular segments. Three kinds of produced torques are achieved analytically and the results are compared to the three dimensional finite element simulation results.