Design and research of embedded dual output composite motor based on ultra-low speed and high torque

In view of the increasing demand for high-torque ultra-low-speed direct-drive motors in oilfield and military fields, a new embedded direct-drive composite motor is proposed, which can realize high-torque ultra-low-speed output on both sides. The inner rotor of the permanent magnet motor is used as the outer rotor of the permanent magnet gear according to the characteristics of the permanent magnet motor and the permanent magnet gear. The inner rotor of the PM gear is embedded into the internal space of the PM motor to achieve double-sided output through the embedded structure. Then the main influencing factors of the output performance of the permanent magnet gear are analyzed and the parameters of the permanent magnet gear are optimized. Finally, the structural design of the embedded double-sided output composite motor is carried out, and the finite element modeling and simulation analysis of the permanent magnet motor and permanent magnet gear are carried out. From the speed and torque fluctuation curves of the composite motor at no-load start and rated load start, it can be seen that the composite motor has good stable operation and dynamic performance, and can achieve stable output with ultra-low speed and large torque.