Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1982-11-08
1985-03-05
Henry, Jon W.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 27, 310 36, 318128, G02B 2717
Patent
active
045027528
ABSTRACT:
An optical scanner or actuator comprising an armature which includes a movable, closed electrically conductive loop, the armature being mounted to rotate about a support axis, current inducing means associated with the electrically conductive loop comprising a stationary flux-conductor extending through and in current-inducing relationship with the loop, and drive means adapted to induce a magnetic current-inducing flux along the flux-conductor in accordance with desired movement of the armature, permanent magnet biasing means comprising a permanent magnet adapted to produce a magnetic field with which current in the electrically conductive loop interacts to cause movement of the armature, one pole of the magnet being permeably connected to one portion of the flux-conductor at a region remote from the electrically conductive loop, and the other pole of the magnet being permeably connected with the flux-conductor via a permeable gap in which a segment of the electrically conductive loop is arranged to move, whereby bias magnetic flux and current-inducing flux share in part the same permeable path along the flux-conductor, and a circuit for controlling the drive means to produce a varying flux in the flux-conductor to cause the armature to rotate back and forth about the support axis. In the form of a resonant scanner, an optical element is attached to the armature in the vicinity of the support axis and arranged to receive a beam to be directed by the optical element, and the control circuit produces signals to induce a varying current in the closed movable electrically-conductive loop to produce resonant scanning motion of the optical element.
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General Scanning Inc.
Henry Jon W.
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