Zero Power Control for Permanent Magnetic Suspension System

This paper describes a permanent magnetic suspension system that consists mainly of a permanent magnet, an actuator and sensors. This magnetic suspension system is based on a zero power control method, which results in almost no power consumption in the equilibrium state. Aspring is installed in the magnetic suspension device to counterbalance the force of the actuator on the mass gravitation in the equilibrium position. An integral feedback loop is used in the controller to achieve zero actuator current when the device is in a balance state. A model was set up for feasibility analysis, a prototype was manufactured for experimental confirmation, numerical simulations for the zero power control were carried out based on the model, and experiments were completed for practice confirmation using the prototype. Some results of simulations and experiments are shown and analyzed here, and conclusions based on these results are given.