Design and Optimization of a Single-Phase Tubular Linear Oscillating Permanent Magnet Machine for Stirling Generator

Stirling generator is considered as the most promising solution for propulsion power systems and energy systems in space research stations. In order to meet the requirement of the free-piston Stirling engine, a novel single-phase tubular linear oscillating permanent magnet machine (STLOPM) for Stirling generator is introduced in this paper. Compared with traditional linear flat machine, it experiences no net radial forces theoretically and is easy to seal. The significance of the structural parameters is evaluated effectively based on the sensitivity analysis method. On the basis of multi-objective particle swarm algorithm (MOPSO), the structure parameters identified as highly sensitive through the sensitivity analysis mentioned above are optimized to maximize rated power, maximize rated force, minimize total voltage harmonic distortion, and minimize total force harmonic distortion. The electromagnetic performance by finite element analysis simulation will be verified by physical test of the prototype in the later publication.