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ROTOR FOR ROTARY ELECTRIC MACHINE AND ROTARY ELECTRIC MACHINE

  • US 20160036276A1
  • Filed: 03/07/2014
  • Published: 02/04/2016
  • Est. Priority Date: 03/11/2013
  • Status: Active Grant
First Claim
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1. A rotor for a rotary electric machine, the rotor comprising:

  • a rotor core;

    a shaft having therein a coolant flow passage and a coolant supply port, the coolant flow passage being configured to allow a coolant to flow, and the coolant supply port being configured to supply the coolant to the rotor core; and

    a magnet provided in the rotor core, the magnet extending along an axial direction of the rotor core,wherein the rotor core is fixedly mounted on the shaft, the rotor core is formed by laminating steel plates, the rotor core has a coolant flow path through which the coolant flows,the coolant flow path includes a first flow passage and a second flow passage,the first flow passage extends along the axial direction near the magnet,the second flow passage connects the coolant supply port of the shaft and the first flow passage,the first flow passage is formed to penetrate the rotor core by overlapping first slits formed in all of the respective steel plates that constitutes the rotor core,the second flow passage is formed by overlapping second slits formed in the steel plates that constitute an axially intermediate region of the rotor core,the second slits are different in position that are formed in the respective steel platesthe first flow passage and the second flow passage join at the axially intermediate region of the rotor core,the second flow passage is bifurcated toward the first flow passage, andthe second flow passage has a radially symmetrical shape.

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