Passive force balancing of an active magnetic regenerative liquefier
| Autor: | Kerry D. Meinhardt, Jamelyn D. Holladay, Andrew Rowe, J. A. Barclay, Jun Cui, R. Teyber, Evgueni Polikarpov, Edwin C. Thomsen |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Superconductivity Physics Mechanical engineering Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Superconducting solenoid Magnetization Nuclear magnetic resonance Magnet 0103 physical sciences Genetic algorithm Magnetic refrigeration Waveform Minification 010306 general physics |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 451:79-86 |
| ISSN: | 0304-8853 |
| Popis: | Active magnetic regenerators (AMR) have the potential for high efficiency cryogen liquefaction. One active magnetic regenerative liquefier (AMRL) configuration consists of dual magnetocaloric regenerators that reciprocate in a persistent-mode superconducting solenoid. Issues with this configuration are the spatial and temporal magnetization gradients that induce large magnetic forces and winding currents. To solve the coupled problem, we present a force minimization approach using passive magnetic material to balance a dual-regenerator AMR. A magnetostatic model is developed and simulated force waveforms are compared with experimental measurements. A genetic algorithm identifies force-minimizing passive structures with virtually ideal balancing characteristics. Implementation details are investigated which affirm the potential of the proposed methodology. |
| Databáze: | OpenAIRE |
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