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Linear synchronous motor with multiple time constant circuits, a secondary synchronous stator member and improved method for mounting permanent magnets

  • US 6,930,413 B2
  • Filed: 05/23/2003
  • Issued: 08/16/2005
  • Est. Priority Date: 05/24/2002
  • Status: Expired due to Term
First Claim
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1. A synchronous linear electrical machine operable as a motor or an electrodynamic brake, comprisingan array of at least two permanent magnets arrange in alternating polarity;

  • a ferromagnetic back plate having machined pockets to accept the permanent magnets in such a manner that will allow for highly accurate pole pitch spacing along the magnetic array, wherein said pockets surround and keep respective magnets in place;

    a one-piece ladder-type frame made of a non-ferromagnetic material; and

    one piece ladder-type frame made of a conductive material laminated to said one-piece ladder type frame made of a non-ferromagnetic material;

    a non-magnetic case in which said frames are welded, wherein said frames are blind drilled and tapped to create a bolt pattern that matches a bolt pattern of the ferromagnetic back plate.

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