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Polyphase linear motor

  • US 4,220,899 A
  • Filed: 09/14/1978
  • Issued: 09/02/1980
  • Est. Priority Date: 09/19/1977
  • Status: Expired due to Term
First Claim
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1. A polyphase linear motor, particularly for use as a drive motor for peripheral equipment in data-processing installations or the like, the motor comprising a stator and an armature mounted for travel along the length of the stator, the stator including an elongated inner flux-carrying structure extending in the direction of armature travel;

  • a plurality of stationary coils on the inner flux-carrying structure, the stationary coils being spaced in the direction of armature travel;

    a plurality of permanent magnet units on the armature, the permanent magnet units being spaced in the direction of armature travel, each permanent magnet unit surrounding the inner flux-carrying structure and the coils on the latter, the magnetic polarity of successive ones of the permanent magnet units alternating proceeding in the direction of armature travel from one permanent magnet unit to the next; and

    an outer flux-carrying structure extending in the direction of armature travel and surrounding the armature.

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