Sandia National Laboratories is developing a prototype 30kW free-piston internal-combustion-based linear generator for vehicular applications. This paper describes the development and experimental validation of a mathematical model for the permanent magnet linear alternator that will be used by the prototype. A magnetic-flux versus mover-position function is used to correlate individual coil fluxes to the motion of the mover. This function is derived from a finite element electromagnetic simulation of the linear alternator. The mathematical model of the alternator is compared to experiments with prototype hardware driving 0.5–2kW loads; excellent correspondence to measured voltage and current waveforms is found.
- Advanced Energy Systems Division and Solar Energy Division
Modeling and Experimental Characterization of a Permanent Magnet Linear Alternator for Free-Piston Engine Applications
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Aichlmayr, HT, & Van Blarigan, P. "Modeling and Experimental Characterization of a Permanent Magnet Linear Alternator for Free-Piston Engine Applications." Proceedings of the ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASME 2009 3rd International Conference on Energy Sustainability, Volume 1. San Francisco, California, USA. July 19–23, 2009. pp. 761-770. ASME. https://doi.org/10.1115/ES2009-90396
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