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Method of assembling rotor magnets

  • US 5,117,553 A
  • Filed: 06/13/1991
  • Issued: 06/02/1992
  • Est. Priority Date: 06/25/1990
  • Status: Expired due to Fees
First Claim
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1. A method for fixing a permanent magnet in an internal permanent magnet rotor of a dynamoelectric machine, said rotor having at least one axially-extending slot for receiving a permanent magnet, the method comprising the steps of:

  • inserting a permanent magnet into said axially-extending slot;

    cooling a nonmagnetic metal wavy spring to a preselected temperature at least low enough to cause the spring to lose its shape memory;

    flattening the cooled wavy spring;

    inserting the flattened, cooled wavy spring into a space between the magnet and at least one side of said slot in which the magnet is inserted; and

    allowing the wavy spring to warm to ambient temperature and regain its shape memory to wedge the magnet tightly in said slot.

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