Stirling cycle machines

Details Stirling cycle machines Stirling cycle machines

1981-06-24

1983-08-09

Capossela, Ronald C.

Refrigeration

Gas compression, heat regeneration and expansion, e.g.,...

60520, 62228, F25B 900

Patent

active

043971555

ABSTRACT:
A Stirling cycle machine in which the compressor/expander is in driving connection with a first electromagnetic unit, and in which a second electromagnetic unit is connected to the displacer and can be operated as an externally-variable control of the movements of the displacer. In one form of the invention the second unit acts as an electromagnetic damper upon movements which the displacer makes in natural response to those of the compressor. In another form of the invention the second unit positively drives the displacer and the two units are interconnected by means including a phase-shifting device whereby movements of compressor and displacer are kept of equal frequency but variable as to phase difference. Transducers sensitive to position, velocity or accelaration may improve control of the movements of compressor and displacer, and a temperature sensor associated with the "cold finger" of the displacer may further improve control of the movements of the latter.

REFERENCES:
patent: 3774405 (1973-11-01), Leo
patent: 4118943 (1978-10-01), Chellis
patent: 4306419 (1981-12-01), Schwartz

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