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Rotor Assembly with Electron Beam Welded End Caps

  • US 20140339950A1
  • Filed: 05/18/2013
  • Published: 11/20/2014
  • Est. Priority Date: 05/18/2013
  • Status: Abandoned Application
First Claim
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1. A method of fabricating a rotor assembly for an electric motor, the method comprising:

  • inserting a plurality of rotor bars into a corresponding plurality of slots within a stack of laminated discs, wherein a first portion of each of said plurality of rotor bars protrudes from a first end surface of said stack of laminated discs, and wherein a second portion of each of said plurality of rotor bars protrudes from a second end surface of said stack of laminated discs;

    mounting a first end cap to said plurality of rotor bars, wherein said first portion of each of said plurality of rotor bars fits within a corresponding slot of a first plurality of slots in said first end cap;

    mounting a second end cap to said plurality of rotor bars, wherein said second portion of each of said plurality of rotor bars fits within a corresponding slot of a second plurality of slots in said second end cap;

    directing a first electron beam towards a circumferential side surface of said first end cap and fusing at least a region of said first portion of each of said plurality of rotor bars to said corresponding slot of said first plurality of slots of said first end cap; and

    directing a second electron beam towards a circumferential side surface of said second end cap and fusing at least a region of said second portion of each of said plurality of rotor bars to said corresponding slot of said second plurality of slots of said second end cap.

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