Rotor Design and Simulation analysis of low-power PERMANENT magnet BRUShless DC Motor

Permanent magnet brushless DC motor is characterized by green environmental protection, high efficiency and energy saving, small footprint and multiple functions. It is widely used in medical equipment, precision instruments, aerospace and other fields. At present, there are many studies on permanent magnet brushless DC motor, which tend to improve motor performance and reduce the amount of permanent magnets. In this paper, the permanent magnet structure of low-power PERMANENT magnet synchronous motor is studied. The simulation model adopts 4-pole and 6-slot structure. Based on the method of controlling other variables, the influence of different permanent magnet thickness on the performance of permanent magnet synchronous motor is analyzed by ANSYS simulation. The results show that the thickness of permanent magnet has great influence on the magnetic field intensity and air gap density in a certain range. The thickness of permanent magnet is 3.5mm, and the peak torque of groove is 147mm. When the thickness of permanent magnet is 3.5mm, the waveform of air gap flux density is more stable and the flux density distribution is more uniform. Compared with 1.5mm, 2.5mm and 4.5mm, the motor design requirements can be better met, and the amount of permanent magnet is the least.