Journal
ENERGY CONVERSION AND MANAGEMENT-X
Volume 14, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.ecmx.2022.100195
Keywords
Free Piston Engine Generators (FPEG); Linear Electric Machine (LEM); Permanent Magnet Linear Synchronous; Machine (PMLSM); Non-Linear Modelling; Multi-Domain Modelling
Categories
Funding
- royal society [IEC/NSFC/181025]
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This paper presents a multi-domain model of a Permanent Magnet Linear Synchronous Machine (PMLSM) for Free Piston Engine Generators (FPEG) and validates the model's accuracy and performance with experimental data.
The Free Piston Engine (FPE) can be considered a viable and promising option in future low-carbon technology development. When coupled to the Linear Electric Machine (LEM) to produce electrical energy, its characteristic non-linear dynamics typically have been described as linear when considering a systems-level modelling approach. This paper presents a multi-domain model of a Permanent Magnet Linear Synchronous Machine (PMLSM) for Free Piston Engine Generators (FPEG) and offers a detailed non-linear mathematical description of the machine dynamics. The model was implemented in a free-piston expander system and validated against experimental data from a test rig that has identical parameters. The simulation results indicate a strong correlation to the experimental data, which captured the dominant dynamics of the PMLSM and prove the satisfactory accuracy and performance of the model, together with a similar voltage and current output trace, indicating a cyclic energy output error of approximately 10 %. This paper aims to extend the current knowledge and literature within FPEG PMLSM design by considering the inherent non-linearity and multi-directional nature of the system dynamics and its interactions with multi-physical domains.
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