Abstract
A new magnetic gear system with an actuator made by an electromagnet is proposed. Vibration due to the system parameter variations or external disturbance is absorbed by changing the magnetic fluxes in this electromagnet, and the controller is designed by variable structure system theory. Theoretical expressions for the transmitted torque, magnetic spring constant and control force versus electric current in the electromagnet are derived. Simulations of this magnetic gear system have been carried out by using sliding mode control and the results are compared with those obtained by the PID control method. The experimental results for the sliding mode controller confirm the theoretical analyses.
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