Two dimensional finite element analysis of passive rotor transverse flux motors with slanted rotor design

This paper proposes a new type of transverse flux motor (TFM) with passive rotor and permanent magnets on the stator. This design decreases mechanical shock sensitivity, facilitates cooling-both for increased magnet lifetime-and avoids the mechanical difficulties of putting brittle permanent magnetic materials on the rotor while retaining the high force densities of active rotor TFMs. A simplified 2D machine model for finite element analysis is presented and the influence of design parameter variations on the torque output of the motor is investigated. The general feasibility of this design is confirmed and further improvement paths are suggested to increase the achievable force density and reduce the use of permanent magnet material.