A High Torque Density Outer Rotor Claw Pole Stator Permanent Magnet Synchronous Motor

This paper proposes a high torque density outer rotor claw pole permanent magnet synchronous motor (CPPMSM). The increased torque density will allow for the development of many low speed actuators without transmission or with small gear ratio, such as the actuators for robotics and alternators used in automobiles. The analytical design method, the structure of the machine as well as the results of a three dimensional (3D) electromagnetic model in ANSYS Maxwell are presented. A complete multi-physics finite element analysis including the electromagnetic and thermal analysis are presented. Moreover, an improved model for continuous operation of this machine has been proposed and analyzed to compare with the proposed results.