Abstract
A phase shifter, which controls the phase angle between the mass flow and the pressure, plays a key role in the performance of a pulse tube refrigerator. The purpose of this paper is to examine the influence of an active phase controller (APC) instead of using inertance and buffer as a phasor. An electrically driven and mechanically damped linear compressor, which is directly connected at the warm end of the pulse tube using a connecting tube, is used as the APC. Therefore, this Stirling type active phase control pulse tube refrigerator (APCPTR) has no reservoir. The advantage of this phase shifter is that it is easy to control the electric input power and the phase angle. Also, the APCPTR is able to operate at any desired temperature region or condition. In order to clarify the characteristics of APCPTR, the cold end temperature and power consumption of the APCPTR has been measured.
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