A Novel High Performance Magnetic Gear with Auxiliary Silicon Steel Sheet

Abstract

Magnetic gear is a transmission device with novel structure. It uses the principle of magnetic field modulation to transmit torque. In view of the magnetic leakage of the magnetic gear in the process of rotation and cannot be eliminated, a magnetic gear model with auxiliary silicon steel sheet is proposed. Based on the conventional magnetic gear structure, the silicon steel sheet is placed outside the permanent magnet of the outer rotor. The magnetization mode of the outer rotor permanent magnet is tangential magnetization, and the spoke structure is adopted, and the inner rotor PMs is surface mounted and magnetized in the radial magnetization. The improved model is simulated by finite element method under three-dimensional conditions, and the electromagnetic performances of the model are optimized. Compared with the conventional magnetic gear model, the improved model has good performance, which improves the transmission capacity of output torque and reduces torque ripple. It is a great significance to improve the performance of magnetic gear.

Keywords

• magnetic gear
• magnetic flux leakage
• magnetic field modulation
• magnetic flux density
• torque