Abstract
This paper describes a zero power control method of a hanging type magnetic suspension system, using a linear actuator to control the permanent magnet attractive force to maintain the levitation device suspending. A spring was installed in the magnetic suspension device to counterbalance the force of the actuator on the mass gravitation, and an integral feedback loop was used in the controller to adjust the actuator current zero in the balance state. According to a theoretical model, numerical simulations and experiments were completed, and some results are shown here.
