| 摘要 |
An electrodynamic actuator has a permanently magnetic stationary part that forms an air-core with a magnetic field, and an armature with a coil arranged in the air-core. The armature moves in the magnetic field in the air-core dependent on a drive current fed to the coil. An increased accuracy is achieved by the provision of damping in relation to the speed of the armature, by arranging a sensing winding on the armature and connecting a calculation unit to the sensing winding. The calculation unit determines the speed of the armature from an induced voltage in the sensing winding caused by a movement of the armature in the magnetic field.
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