| 摘要 |
The fin cross-section increases surface area without causing outer surface roughness - DETAILED DESCRIPTION - The casing for a cylindrical electric motor (20) has a number of radiating fins projecting from its outer surface.These have a T-shaped cross-section and extend longitudinally, parallel to the cylinder axis. The projecting fins are equally spaced around the circumference of the cylinder, and define between them a comparable set of T-section channels (22). These serve to provide ventilation and assist the cooling of the fins. The T-shaped cross-section increases substantially the surface area which is in contact with the surrounding air, and thus enhances cooling
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