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DYNAMOELECTRIC MACHINE COOLED BY A ROTATING HEAT PIPE

  • US 3,715,610 A
  • Filed: 03/07/1972
  • Issued: 02/06/1973
  • Est. Priority Date: 03/07/1972
  • Status: Expired due to Term
First Claim
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1. In a dynamoelectric machine characterized by a rotor, a stator and at least one coil formed of an electrical conductor multiply wound into a plurality of substantially closed loops upon said rotor to rotate therewith, the improvement comprising a radially elongated evaporator disposed within said coil to rotate about the axis of said rotor, said evaporator containing fluid refrigerant vaporizable at a temperature Below the maximum operating temperature of said coil at the total pressure upon said refrigerant in a liquid state at the normal operating speed of said machine to remove heat from said coil by conversion of said refrigerant from a liquid to a gaseous state, a condenser suitable outside said coil within an environment sufficiently cool to convert gaseous refrigerant to a liquid state, means interconnecting said evaporator and said condenser to permit gaseous refrigerant formed by absorption of heat from said coil to exit from a radially inward orifice of said evaporator to said condenser and means for returning condensed liquid refrigerant from said condenser to a radially outer orifice of said evaporator by the centrifugal forces acting upon said liquid refrigerant.

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