Structure Design and Simulation Analysis of the Double Meshing Gear Motor

As the development of robot technology and automation etc., the motor has been required for more torque and less volume. This paper presents a type of low speed and high torque motor ——a double meshing motor with new structure and new principle integrating the reduction gear which can be applied in robot joint and meets the need of space endurance and space fitness of robot. Compared with conventional motors, the noticeable features of this motor are short drive chain, high respond speed, stability at low speed, big output torque. For the reason of using two rotors, the eccentric force and operation vibration induced by the eccentric motion of rotors can be balanced and decreased efficiently. Additionally, the operation principle and mechanism characteristics of this new motor are introduced, and a solid model is designed. As for the control method, it is simple and same as the switched reluctance motor. The magnetic circuit model of this motor is established, and this model is applied to analysis the features of motor as well as the finite element analysis is also figured out. The coenergy principle is used to calculate the starting torque of the motor. For verifying the calculation, the results of finite element analysis is adopted to compare with the results calculated by magnetic coenergy method. Based on these results of calculation and finite element analysis simulation, the double meshing motor has higher torque and lower speed compare with the conventional motor has the same volume; it is evident that the double meshing gear motor has application prospect and practical value.