It is illustrated in manufacturing micromotor that the contact friction between rotor and substrate or axial is a major hurdle in the instability of rotor. The rotation rate and lofetime are far away from the theoretical value. It is a good manner of replacing the mechanical bearing by electric suspension. In this paper

we present the stable equilibrium condition of electrostatic suspension and simulate the dynamics process of levitation. We have also experimentally demonstrated the robustness and practicality of the electrostatic suspension in micromotors:a 3cm diameter and 0. 2mm thick glass plate was levitated from rest and held stably after tuning the circuits.