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Method of making a laminated stator

  • US 4,642,882 A
  • Filed: 08/21/1985
  • Issued: 02/17/1987
  • Est. Priority Date: 08/21/1985
  • Status: Expired due to Fees
First Claim
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1. A method of making a laminated stator for a linear electrodynamic machine comprising the steps of:

  • providing a cylindrical stator member of magnetic material defined by a cylinder of a predetermined radius;

    forming a plurality of uniformly spaced, axially extending radial slots in said stator member each being of uniform width and of a first preselected radial depth which is less than said predetermined radius to form radially tapered laminations which remain joined together at their radially inward ends by a cylindrical core portion;

    forming a plurality of uniformily spaced circumferential grooves of a second preselected radial depth and uniform cross section in the cylindrical stator member;

    electrically insulating on all the surfaces of the circumferential grooves;

    electrically insulating all the surfaces of a preselected one of the axially extending radial slots to form an insulated wireway extending between the ends of the cylindrical stator member;

    winding a plurality of turns of a continuous wire in each of the circumferential grooves to form toroid-shaped coils therein such that the continuous wire is passed in sequence to each adjacent circumferential groove through the insulated wireway;

    providing a cylindrical stator shell of magnetic material and having an inner dimension adapted to fit tightly over the stator member outer periphery to form a stator assembly and having on the inner dimension surface axially extending radial slots of the same spacing as the radial slots on the stator member;

    introducing an uncured bonding material into all the voids in the stator assembly;

    curing the bonding material in the stator assembly; and

    forming a bore of a preselected radius in the stator assembly such that the core portion is completely removed and the radially tapered laminations are separated from the adjacent laminations by cured bonding material and held in radial compression by the cylindrical stator shell.

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