Abstract: This paper proposes a magnetic suspension system using a permanent
magnet (PM) and a rotary actuator. In this suspension system, the suspension
force is controlled by a variable magnetic flux path mechanism where the flux
path is changed by varying the angle of the PM. The PM is magnetized in radial
direction and driven by a rotary actuator. This system can change the magnetic
polarity of the stator and generate a very small suspension force through
rotating the PM to some special angles. Since the fixed cores sustain the
gravitational force of the suspended object and the rotary actuator has a
larger reducer, this system also can generate a very big suspension force
comparing with the input force. In this paper, first the prototype and the
principle of this magnetic suspension system are explained. And in order to
verify the proposed principle, the IEM (integral element method) analysis and
basic experiments for magnetic flux density and attractive force are performed.
The model is created, and the numerical simulation is carried out. Finally,
suspension experiments are executed, and the results support our proposal.
