Diamond-Coated Laminations for High-Performance Motors

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Abstract
The high thermaJ conductivity and electrical resistivity of diamond make it an attractive material for enhancing heat transfer in the lamination stack of high-performance electric motors provided that it can be effectively and economically applied to the laminations. This brief study shows that, in principle, diamond core plate could double the radial thermal conductivity. Coating experiments, while not complete, show that many of the problems could be solved and that further development is warranted.

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