Modelisation and Optimization of Clutch Magnet Actuator Topologies

This paper presents the study of clutch magnet actuators. Two topologies, considering different magnetic constraints of saturation are designed in order to generate powerful engaging force in a limited volume. The magnetic models are based on a reluctance equivalent magnetic circuit considering the magnet flux leakages. The model results are then compared and validated with finite element computations and measurements on different built actuators. Finally, the validated analytical models are coupled to a particle swarm optimization algorithm in order to maximize the transmitted torque or the torque to volume ratio. The study shows that a reluctance circuit model validated by some experimentation and coupled to a particle swarm algorithm gives a solid and efficient basis for the design and the optimization of clutch magnet actuators.