The experimental performance of a pulse tube cryocooler (PTC) with an active phase compressor (APC) is presented. In order to investigate the phase shifting ability of APC

phase locked loop (PLL) was adopted to control APC's voltage amplitude and phase between APC and main compressor (MC). When the voltage phase (APC lags MC) are 210° and 240°

performances of the cryocooler are tested under the displacement phase angle of 90°-130°. The results show that PTC with APC performs differently when the cryocooler working at different voltage phases

though displacement phase angle is the same. Comparing with PTC with inertance tube (IT)

performance of PTC with APC is better. Specifically

if cooling power is 30W

input power of PTC with APC decreased 8.1%. At last

from the perspective of phase shifting and matching with compressor

the reason why PTC performs differently under different phase-shifting method is demonstrated

which indicates APC could replace IT to shift PTC's phase.