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Electronically commutated motor, stationary and rotatable assemblies therefore, and lamination

  • US 4,327,302 A
  • Filed: 09/21/1979
  • Issued: 04/27/1982
  • Est. Priority Date: 09/21/1979
  • Status: Expired due to Term
First Claim
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1. A lamination adapted to be used in a core of a dynamoelectric machine, the lamination comprising:

  • a unitary body of generally thin ferromagnetic material;

    an outer peripheral edge of said body;

    an inner peripheral edge on said body and spaced generally radially from said outer peripheral edge;

    a plurality of generally V-shaped openings through said body between said outer peripheral edge and said inner peripheral edge and disposed with respect to each other generally in arcuate spaced relation about said body, said openings each having first and second leg parts converging toward each other generally in a direction from said outer peripheral edge toward said inner peripheral edge, said first and second leg parts including first and second pairs of opposed side edges, first and second end edges interposed between said first and second side edge pairs and spaced adjacent said outer peripheral edge, and a common end edge interposed between one of said opposed side edges of said first and second side edge pairs and spaced adjacent said inner peripheral edge, respectively;

    a plurality of first pole sections on said body between opposite ones of said one opposed side edges of said first and second side edge pairs in adjacent ones of said openings and extending generally between said outer peripheral edge and said inner peripheral edge, respectively;

    a plurality of bridges on said body between said common end edges and said inner peripheral edge and integrally interconnected between adjacent ones of said first pole sections, respectively;

    a plurality of second pole sections on said body disposed between the other of said opposed side edges of said first and second side edge pairs and extending from said outer peripheral edge generally toward said inner peripheral edge, said second pole sections including a plurality of free end edges interposed between said other opposed side edges of said first and second side edge pair and spaced from said bridges, respectively; and

    a plurality of pairs of bridges on said body between said outer peripheral edge and said first and second end edges of said first and second leg parts and integrally interconnected between said first pole sections and said second pole sections, respectively.

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