Linear motor with a plurality of stages independently movable on the same path

  • US 5,965,963 A
  • Filed: 05/07/1998
  • Issued: 10/12/1999
  • Est. Priority Date: 02/26/1998
  • Status: Expired due to Term
First Claim
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1. A linear motor comprising:

  • a motor controller;

    a path;

    said path including a plurality of armature windings therein;

    at least first and second linear motor stages independently movable on said path;

    a plurality of motor permanent magnets on each of said first and second stages facing said path for interaction with said armature windings;

    a first encoder associated with said first linear motor stage;

    said first encoder including wireless means for communication at least one of motion and position of said first linear motor stage to a motor controller;

    a second encoder associated with said second linear motor stage;

    said second encoder including wireless means for communication of at least one of motion and position of said second linear motor stage to said motor controller;

    said path including first means for applying first drive power from said motor controller to those of said plurality of armature windings within a magnetic influence of said motor permanent magnets on said first stage;

    said path including second means for applying second drive power from said motor controller to those of said plurality of armature windings within a magnetic influence of said motor permanent magnets on said second stage; and

    said first and second means being simultaneously operable, whereby simultaneous independent drive of said first and second linear motor stages is enabled.

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