Patent ID: 7504758
Filing Date: 2009-03-17
Classification: H02N

Abstract:
1. An electrostatic actuator comprising: a stator having a plurality of stator electrodes arranged thereon; a mover having a plurality of mover electrodes arranged thereon, the mover moving in a predetermined moving direction with a surface thereof facing a surface of the stator; a power feeding unit for applying a predetermined driving voltage to the stator electrodes; and a control unit for controlling the power feeding unit; wherein the stator electrodes include a plurality of electrical systems repeatedly arranged in a predetermined order in the moving direction, a pitch of the stator electrodes forming the electrical systems of the same type in the moving direction is equal to a pitch of the mover electrodes in the moving direction, and wherein the mover includes at least two types of the mover electrodes having different lengths in the moving direction.