Performance Simulation and Measurement of Linear Motors for Free-Piston Stirling Coolers
Tang Tianyan;Xuan Lian;Liang Weiqing;Sun Yi;Liu Jing;Shanghai Micropowers Ltd.;Shanghai Marine Diesel Engine Research Institute;
The structure of linear motor for free-piston Stirling cooler is introduced. FEM simulation was carried out on the linear motor with the Ansoft software, and matching with the simulation software for whole free-piston cooler, the performance of linear motor and whole cooler were studied. Test verification was carried out on three linear motors with different outer air gaps, and it showed that the linear motors have big effect on the whole cooler, and the motor's mass may influence the natural frequency of the rotor system, and reduce the cooling efficiency of the free-piston cooler. The outer air gap had a bigger influence on the linear motor, and 0.5 mm was proved to be the optimal parameter by comparison. During the manufacturing, the machining accuracy of the radical direction must be maintained at a reasonable level.
【CateGory Index】： TM359.4;TB651;TP391.9