Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1977-04-11
1980-12-09
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 10, H02K 132
Patent
active
042387019
ABSTRACT:
A superconducting generator or alternator in which the electrical winding is disposed within a fluid impervious outer shell. Liquid coolant is introduced into the interior of the shell via a liquid coolant supply pipe that terminates in an axially extending liquid coolant intake trough. The trough separates the incoming coolant from an annular coolant bath that submerges the electrical winding of the generator during superconducting operation. Heat conducting tubes extend radially outward from the bottom of the trough and permit a flow of liquid coolant therethrough to adjacent the outer shell. Sensible heat of compression (resulting from the rotation of the generator) produced in the coolant stream in the tube is at least partially withdrawn from the stream by the tubes and transferred to the inner surface of the bath so that the coolant is discharged from the tubes at a lesser temperature than would otherwise be the case. The discharged coolant is circulated past the electrical winding towards the inner surface of the annular coolant bath where it evaporates. The center of the generator is maintained at a vacuum and coolant vapor is withdrawn and circulated through a conventional refrigeration system for return in liquid form to a liquid coolant supply pipe which in turn flows the coolant back into the trough. A liquid coolant accumulator can be employed in the liquid coolant supply so that the coolant is maintained at a constant pressure. Variations in the coolant demand are self-regulated by corresponding variations in the depth of the coolant intake pool in the trough.
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patent: 4123677 (1978-10-01), Laskaris
Electric Power Research Institute
Skudy R.
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