专利名称：ELECTROMAGNETIC ACTUATOR WITH
CONTROLLED ATTRACTION FORCE
发明人：WALRAET, DAVID申请号：EP03720653.9申请日：20030228公开号：EP1481406A1公开日：20041201
摘要：The invention concerns an electromagnetic actuator comprising an actuatingmember (6) connected to a relay armature (8) which is mobile under the effect of a drivemember including at least a coil (1) for generating a magnetic flux in the core (2) having asurface extending opposite one surface of the relay armature (8), one at least of theopposite surfaces comprising at least one recessed portion (10), the relay armature (8)and the core (2) being arranged to define, in a first zone (12) of the relay armature (8) andof the core (2) including the recessed portion, a first magnetic path which is interruptedby an air gap at least equal to the recess of the recessed portion (10) when the relayarmature (8) is pressed on the core (2), and in a second zone (13) of the relay armature (8)and of the core (2) excluding the recessed portion (10) a second magnetic path which isinterrupted only by a residual air gap when the relay armature (8) is pressed on the core(2), the recessed portion having a total area not greater than the area bringing themagnetic flux to saturation in the second zone of the relay armature.
申请人：JOHNSON CONTROLS TECHNOLOGY COMPANY
地址：700 Warverly Road Holland, MI 49423 US
国籍：US
代理机构：Fruchard, Guy
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