Patent ID: 6549390
Filing Date: 2003-04-15
Classification: F01L,F02D,Y02T

Abstract:
An actuator controller, comprising:a pair of springs acting in opposite directions; an armature connected to said springs and supported in a neutral position provided by said springs in an inactivated state, said armature being coupled to a mechanical element; a pair of electromagnets for driving said armature between a first terminal position and a second terminal position; estimating means for estimating magnetic flux generated by one or the other of the pair of electromagnets attracting said armature when said armature is driven from one of the terminal positions to the other of the terminal positions; and means for switching said one or the other of the pair of electromagnets from an attracting phase to a holding phase when said magnetic flux estimated by the estimating means reaches a target value determined based on an operating speed of the armature.