Analysis of surface-mounted permanent magnet synchronous electric machine parameters on the output torque and efficiency

Surface-mounted permanent magnet synchronous electric machines play an important role in industrial production. Output torque and efficiency are important indicators of electric machines. The key parameters of electric machines have a great influence on output torque and efficiency. First, this paper gives the conceptual design diagram of the electric machine and derives the governing equations of output torque and efficiency. The electric machine structure parameters are optimized by numerical simulation, and the relationships between the core material, permanent magnet grade and output torque and efficiency are studied. Subsequently, the influence of stator and rotor parameters on output torque and efficiency is researched. The research results show that high-performance cores, high-grade permanent magnets, large tooth width, small slot open width, large magnet thickness and electrical angle, and small magnet reduction can help improve the output torque and efficiency of the motor.