Development of high performance moving-coil linear compressors for space Stirling-type pulse tube cryocoolers

Modelling and Measurement of a Moving Magnet Linear Motor for Linear Compressor

“…Dang et al optimized the parameters of a moving coil motor for linear manufactured linear compressor was tested and a maximum motor efficiency of 79.4 [30]. It was also reported that the mean motor efficiency for some typical compresso space Stirling-type pulse tube cryocoolers ranges between 74.2% and 83.6% [31]. moving magnet motors, moving coil designs usually need larger permanent magne the effective current transmission from external supply system to the moving components increase the cost and complexity.…”

“…The manufactured linear compressor was tested and a maximum motor efficiency of 79.48% was reported [30]. It was also reported that the mean motor efficiency for some typical compressors developed for space Stirling-type pulse tube cryocoolers ranges between 74.2% and 83.6% [31]. Compared with moving magnet motors, moving coil designs usually need larger permanent magnets.…”

Theoretical and experimental investigations on the partial scaling method for the Oxford-type moving-coil linear compressor

“…4) developed in NLIP/SITP/CAS [8] is selected to scale. This original compressor couples with a coaxial pulse tube cold finger developed in the same laboratory [18] to form a cryocooler working above 50 K [17].…”

“…For these features, the Oxford-type linear compressor has been recognized as an excellent driver with negligible radial forces, high efficiency, low vibration, low noise, high reliability and long operation life. Dang [8] presented a review of the recent development of Oxford-type moving-coil linear compressors for space Stirling-type pulse tube cryocoolers in the National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences (NLIP/SITP/CAS), in which the design, manufacture and assembly methods were described with special emphases laid on linear motor, clearance seal, flexure springs, dual-opposed configuration and flexible design. This paper will further focus on the flexible design, in which the so-called partial scaling method will be put forward and then investigated theoretically and experimentally.…”

Theoretical and experimental study of a novel compressor

“…Nicholas and Reuven's [22] investigation determined about 33% improvement in the COP of a linear compressor compared to a crank-mechanism driven reciprocating compressor of the same volumetric capacity. A moving coil linear compressor with variable input capacity ranging from few milliwatts to 500 W was studied to have motor efficiencies ranging from 74-84% [26]. This compressor was used in a Stirling-type tube cryocooler to provide the temperatures below 12 K [27].…”