電動機ロータのラジアルダクトの熱伝達に関する実験的研究

概要

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Radial rotor ducts have been used in the rotor core as one of the better methods for cooling the rotor core and conductors. However, the heat transfer coefficient is not clear. This paper describes the experimental results regarding heat transfer performance, where the rotational numbers are from 0 to 1800 rpm and Reynolds numbers are from 700 to 6000. The relationship of the average Nusselt numbers to each Reynolds number was clarified using the rotational numbers as parameters, and then expressed graphically. When Reynolds numbers are over about 2000, the average Nusselt numbers are strongly affected by the velocity of air flow through the radial rotor duct. When Reynolds numbers are less than about 2000, the average Nusselt numbers are also strongly affected by the rotational numbers. Additionaly, when the flow path in the radial rotor duct is shortened, the average Nusselt numbers increase and when the duct width is reduced, they decrease.
一般社団法人日本機械学会の論文
1993-10-25