Patent ID: 6278247
Filing Date: 2001-08-21
Classification: H02K,H02P

Abstract:
An actuator comprising:a magnetic device having a stator and a movable armature operable to produce a force F;a source of a first signal indicative of a first desired movement of the armature;a source of a second signal indicative of a second movement of the armature wherein the noise in the first signal is of magnitude at least as great as the magnitude of the second signal;a first conductor coil wrapped around the armature and connected to the source of first signal to cause the armature to produce a first portion of the force;a second conductor coil wrapped around the armature and connected to the source of second signal to cause the armature to produce a second and smaller portion of the force, wherein the first portion of the force is at least an order of magnitude greater than the second portion of the force; anda filter connected between the source of first signal and the first conductor coil operable to filter out the noise.