Patent ID: 6648297
Filing Date: 2003-11-18
Classification: F01L,H01F

Abstract:
A method for controlling an actuator having at least one electromagnet which has a coil, an armature having an armature plate which can move between a contact surface on the electromagnet and a further contact surface, and at least one restoring means which is mechanically coupled to the armature, comprising the following steps when the armature plate is to be moved from contact with the further contact surface into contact with the contact surface on the electromagnet: supplying a predefined first amount of electrical energy to the coil; controlling the coil into a freewheeling operating state until a first predefined condition is satisfied, whereby the armature plate is near a region of the contact surface; supplying a predefined second amount of electrical energy to the coil before the armature plate is resting on the contact surface of the electromagnet; controlling the coil into a freewheeling operating state until a second condition is satisfied, whereby the armature plate is resting on the contact surface of the electromagnet; and supplying the coil with electrical power which is predefined so that the armature plate remains in contact with the contact surface.