Design and Analysis of a High-Purity Aluminum Inductor
This paper reports on the design and the electromagnetic and thermal analysis of a hydrogen-cooled, high-purity aluminum inductor. The goal of the design is a light-weight coil which utilizes the available liquid hydrogen as coolant. Aluminum was chosen as the conductor material because of its low weight and high RRR at liquid hydrogen temperatures. The conductor consists of a composite aluminum cable which incorporates high-purity aluminum filaments. The cable is spirally wrapped around a 1.8 m diameter, 0.3 m high nonmetallic ring. This geometry was chosen to maximize the heat transfer from the conductor and to ensure an even current distribution. Cooling is provided by liquid hydrogen flowing through the coil. The coil’s field and forces have been analyzed using a three-dimensional electromagnetic model. A detailed thermal analysis of the coil has also been completed.
KeywordsSurface Heat Flux Hoop Stress Liquid Hydrogen OFHC Copper Composite Wire
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