Resistor-containing cryogenic current lead

Details Resistor-containing cryogenic current lead Resistor-containing cryogenic current lead

1978-05-22

1979-08-14

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 64, 310 72, H02K 900

Patent

active

041646711

ABSTRACT:
Resistors disposed for vaporizing vapor-trap liquid coolant are individually connected in series with each of the high-aspect-ratio current leads connected to a superconductive coil of an intermittently operable electromagnetic machine. The portion of each lead extending from a coolant vapor return duct (through which the leads enter the machine) and terminating within the coil chamber is of hollow structure. The terminal length of each such portion is turned radially outward and its open outer end is submerged in the pool of liquid coolant in the chamber. The vapor traps are individually defined by liquid coolant in the hollow terminal length of each lead. Coolant vaporized in each trap flows in lead-cooling relationship with the corresponding hollow lead portion. The high-aspect-ratio leads reduce the heat conducted by the leads during current-off periods, while each resistor produces sufficiently large vapor flow during current-on periods to accommodate the increased cooling load developed by these leads during the latter periods. Intermittent operation can be accommodated with minimal coolant consumption.

REFERENCES:
patent: 4082967 (1978-04-01), Laskaris
patent: 4091298 (1978-05-01), Gamble
patent: 4123677 (1978-10-01), Laskaris et al.
patent: 4126798 (1978-11-01), Carr et al.

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