Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1986-01-10
1987-03-10
Salce, Patrick R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310261, H02K 900, H02K 324
Patent
active
046493034
ABSTRACT:
A rotor for a superconducting rotating electric machine of the type having a coil-carrying shaft including torque tubes connected to opposite ends thereof. A circumferentially-extending groove is formed in the coil-carrying shaft between one of the torque tubes and a recess in the coil-carrying shaft in which superconducting field coils are housed. The radially outer end of the groove opens into a space for liquid helium provided between the outer surface of the coil-carrying shaft and a helium-sealing outer tube. Heat entering the coil-carrying shaft and conducted in a path along the torque tubes is absorbed by the liquid helium within the groove and is prevented from reaching the superconducting field coils. The radially inner end of the groove can be sealed, or it can be connected to a central cavity of the coil-carrying shaft by one or more radially-extending holes through which liquid helium can flow for improving the circulation of helium through the coil-carrying shaft.
REFERENCES:
patent: 4227102 (1980-10-01), Rozenfeld et al.
patent: 4282451 (1981-08-01), Bratoljic
patent: 4430589 (1984-02-01), Sakuyama et al.
patent: 4442369 (1984-04-01), Okamoto et al.
patent: 4556810 (1985-12-01), Kasper et al.
Mitsubishi Denki & Kabushiki Kaisha
Rebsch D. L.
Salce Patrick R.
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