The development of ultra-high speed motor is the development direction of the information industry in the future, and it is also the important guarantee for the production efficiency. Objective: To study the working model of the electromagnetic field of the permanent magnet brushless
DC motor in the condition of constant electromagnetic field. Methods: Based on the theory of constant electromagnetic field, the model of a high speed permanent magnet brushless DC motor is derived. Process: Combined magnetic circuit calculation method and finite element method of electromagnetic
field, and then use the mathematical model to calculate the electromagnetic. Finally, by using the model simulation to verify its practicability. Conclusion: The inhibiting effect of the ring structure rotor pole and cogging torque ripple can meet the requirements of high-speed motor mechanical
and electromagnetic performance, meanwhile, the motor has a good performance in this way. So, it can provide reference for the construction of the transient electromagnetic field model of high speed permanent magnet brushless DC motor in the future.
A High-Speed High-Power-Density Non-Heavy Rare-Earth Permanent Magnet Traction Motor