Axial Magnetic Transmission Mechanism and the Calculation of Magnetic Torque

Magnetic transmission has many advantages of no abrasion, no leakage, and energy saving etc. Magnetic force is transmitted torque by magnetic field. Magnetic circuit is influenced by permanent magnet (PM) distributed according to the theory of magnetic transmission mechanism. The mathematical model of its torque is constructed based on the equivalent magnetic charge principle. Magnetic torque is calculated on these parameters of axial height, circuit distribution of permanent magnet, air gap of active and passive magnetic pole and leakage coefficient. Magnetic force is varied with those parameters changed. The result shows axial magnetic torque can be increased by increasing the density of magnetic distribution and decreasing active and passive air gap.