Comparative Study of An Outer-Rotor Magnetic-Gear-Integrated Brushless Motor under Two Magnetization Methods

A novel magnetic-gear-integrated motor employing Halbach array is presented in this paper. This proposed motor skillfully combines the magnetic gear with the permanent magnet brushless motor. As a result, they could use the same permanent magnet rotor, which makes the motor have higher torque density. Hence, the proposed motor could meet the requirements of low-speed and large-torque in the meantime. Besides, Halbach array and conventional radial structure are respectively used in the PMs of this proposed motor. Meanwhile, the main performance comparison of the two structures is studied through finite element analysis.