Analysis on the speed regulation performance of an adjustable-speed permanent magnet eddy-current coupling with a double-layer permanent magnet rotor

This paper bases on a novel adjustable-speed permanent magnet eddy-current coupling with a double-layer permanent magnet rotor, the output characteristics, speed regulation performance, and the influence of structural parameters are studied, respectively. The structure and working principle are introduced, and the feasibility is verified by calculating the air gap flux density and output torque when the double-layer permanent magnet rotor at different relative positions. Then the output speed characteristic and speed regulation performance are respectively studied when a fan load is applied on permanent magnet rotor. And finally, the influence of structural parameters on speed regulation performance is also researched, including the material of the conductor layer, the thickness of copper layer, and material of permanent magnet.