Decoupling method of radial forces in a dual rotor-type magnetic suspension motor

This paper presents a new decoupling method of the radial forces in a dual rotor-type magnetic suspension motor. The dual rotor-type magnetic suspension motor has been proposed by the author, and the motor structure and the principle of the suspension force generation have been introduced. However, it is possible that the mutual interference between the radial suspension forces in two perpendicular axes occurs, which causes the unstable levitation of the rotor. In this paper, the new decoupling method of the radial suspension forces is proposed to stably levitate the rotor. It is confirmed by the simulation using Finite Element Method (FEM) that the suspension forces are successfully decoupled between the perpendicular axes. The proposed decoupling method is found effective to decrease the vibration of the suspension force and stably support the rotor without mechanical contact.