Improvement of a claw pole motor using additional ferrite magnets for hybrid electric vehicles

This paper presents a design and experimental study of a rare-earth less motor for hybrid vehicles. Claw pole motor was chosen for base topology and additional ferrite magnets are installed into the rotor poles in order to increase high torque capability and to reduce low field excitation loss. Some design criteria, test results and comparison with Nd-Fe-B magnet motor are shown.