Patent ID: 7466045
Filing Date: 2008-12-16
Classification: H02K,Y02E

Abstract:
1. A cryogenic cooler for a dynamoelectric machine that has a superconducting rotor mounted on a dynamoelectric machine shaft and uses a working fluid to cool the rotor, comprising: a cold side heat exchanger mounted proximate the rotor that receives the working fluid and transfers heat Q a regenerator mounted within the dynamoelectric machine shaft that receives the low pressure working fluid from the cold side heat exchanger output path and warms the low pressure working fluid with warm working fluid that it receives from a warm side heat exchanger output path that extends within the dynamoelectric machine shaft and discharges the warmed low-pressure working fluid into a low-pressure regenerator output path that extends within the dynamoelectric machine shaft; a compressor mounted within the dynamoelectric machine shaft that receives the warmed low-pressure working fluid from the low-pressure regenerator output path and compresses the working fluid to a high pressure P a warm side heat exchanger mounted within the dynamoelectric machine shaft that receives the high-pressure working fluid at an elevated temperature from the compressor output path and transfers heat Q a turbine mounted within the dynamoelectric machine shaft that receives the cooler high pressure working fluid from the high-pressure regenerator output path to drive the compressor by way of a drive shaft that extends within the dynamoelectric machine shaft and to expand the working fluid to a lowest temperature at the low-pressure P a supplemental motor coupled to the drive shaft that also drives the compressor.