Fundamental Design of a Consequent-Pole Transverse-Flux Motor for Direct-Drive Systems

Transverse-flux motors are suitable for large-torque generation because multipole devices are easy to be designed. However, these motors employ a surface permanent magnet rotor that consists of many magnets and mainly depend not on reluctance torque, but on magnetic torque, which is generated by the interaction between the magnetic fluxes produced by the magnets and stator-winding excitation. This paper proposes a consequent-pole transverse-flux motor that generates almost the same torque as conventional transverse-flux motors but uses half the number of magnets by generating both magnetic torque and reluctance torque.