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Electric motors and positioning devices having moving magnet arrays and six degrees of freedom

  • US 6,208,045 B1
  • Filed: 11/16/1998
  • Issued: 03/27/2001
  • Est. Priority Date: 11/16/1998
  • Status: Expired due to Term
First Claim
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1. An electric motor, comprising:

  • a planar magnet array having magnets with magnetic fields, the magnets being disposed in a plane; and

    a planar coil array positioned adjacent to the magnet array and operable to interact with the magnetic fields to provide a force between the coil array and the magnet array in a first, second and third direction, the first and second directions being generally parallel to the plane and the third direction being generally orthogonal to the plane;

    wherein the coil array has a first coil period in the first direction and a second coil period in the second direction and wherein the magnet array has a first magnet period in the first direction and a second magnet period in the second direction, the first coil period being less than the first magnet period and the second coil period being less than the second magnet period.

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