Design and Simulation of Permanent Magnet Brushless DC Motor for Small-sized load UAV

With the development of the economy, the cost of UAV R&D and production was reduced, and it was widely used in video aerial photography, agriculture and forestry, industry, rescue, and public safety. UAV s have become one of the popular high-tech industries. Aiming at the characteristics of the use of Small-sized load UAV, a permanent magnet brushless DC motor was designed, and simulation processing was performed to analyze the performance of the motor. The motor was adopted a 24-slot 10-pole structure, an inner rotor form, a rated output power of 120 W, a rated voltage of 113V, the permanent magnet material is rubidium iron boron NdFe35, the rotor outer diameter is 25 mm, and the rotor inner diameter is 10 mm. The results show that the flux density and flux linkage distribution of the motor were concentrated in the stator slots during transient, and the magnetic lines of force were evenly distributed inside the motor. The time for the cogging torque to form a cycle is 16.3 ms, and the peak value at 8 ms is 4.2 N.m.