自然対流冷却を利用したモータフレーム構造

抄録

Natural convection cooling is used for medium or small capacity motors with low revolving speed. In order to raise the cooling performance in natural convection, the fin which consisted of laminated iron core, and the cast frame fin are applied. Cooling performance is determined by heat conduction anisotropy of a laminated iron core, contact thermal resistance between iron core and the frame, and fin pitch, etc. This paper describes the evaluation of a fin pitch which is suitable to natural convection by using computational fluid dynamics, and the results using the thermal network to decide presence of a frame.