Large high-temperature superconducting magnet system based on small refrigerating machine and temperature control method
A high-temperature superconducting and refrigerator technology, which is applied to superconducting magnets/coils, magnetic objects, electrical components, etc., can solve the problems of uneven conduction, increased labor, and long refrigeration cycles in large-scale high-temperature superconducting magnet systems, achieving The effect of reducing waiting time, avoiding manual control, and shortening the cooling cycle
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[0035] Design principle of the present invention
[0036] 1. The design of the helium refrigeration circuit, and the solution to the use of secondary soaking mode, it is necessary to manually control, and the problem cannot be achieved. The liquid nitrogen temperature is 77K, and the lowest cooling temperature of the high-temperature superconducting magnet cannot be achieved. Techniques are ultimately reached 30K cooling targets in two stages, but during the process of replacement liquid nitrogen as liquid helium, it is necessary to control automatic cooling. The present invention uses the helium refrigeration circuit 2 to replace "liquid helium" in the second immersion mode, thereby achieving cooling from 77k to 30K: The principle is: the helium refrigeration circuit 2 is converted by the helium circuit secondary cold head Connect the GM refrigerator 1, the GM refrigerator 1 cools the superconducting coil 5-2 through the helium refrigeration circuit 2, and the superconducting coi...
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