IMPROVED TEMPERATURE CONTROLLED FREE PISTON CRYOCOOLER, A METHOD FOR CONTROLLING THE TEMPERATURE OF A MASS COOLED BY A FREE PISTON CRYOCOOLER, AND AN IMPROVED CLOSED LOOP CONTROL SYSTEM FOR CONTROLLING A FREE PISTON CRYOCOOLER

摘要

The present invention is kept expanding its range and gas bearing system is operable to energy efficiency discloses that for the cooler has two operating modes to take advantage of the piston stroke adjustment. The piston stroke piston stroke adjuster adjusts the piston stroke, and received instruction if the instruction received exceeds the minimum stroke for stroke piston maintains a small if the minimum piston stroke than the minimum stroke. If the commanded piston stroke is less than the minimum piston stroke is applied to the heater heat load greater thermal power. Closed-loop feedback control system having a dynamic leg of the two branches is used. The one branch is controlled by adjustment of the cooler, another one of the parallel branch controls the adjustment of the heater.