Design and analysis of a single-phase oscillating permanent-magnet linear machine

Stirling power generating system, which has the advantages of multiple energies applicable and high efficiency, is promising for aerospace applications. As the main part of Stirling power generating system, single-phase oscillating permanent-magnet linear machine (PMLM) is investigated in this paper. Firstly, the electromagnetic performances, such as no-load back electromotive force (EMF) and thrust, are analyzed by finite element method. The influences of main parameters, including PM thickness, inner and outer diameter of mover iron core and tooth width, on performance are further investigated to obtain the optimal scheme. The proposed scheme can reach the power density of 0.177kW/kg. To ensure safe operation, the thermal field distribution law of the single-phase oscillating PMLM is investigated.

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