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Lamination cooling system

United States Patent

October 11, 2005
View the Complete Patent at the US Patent & Trademark Office
An electric motor, transformer or inductor having a lamination cooling system including a stack of laminations, each defining a plurality of apertures at least partially coincident with apertures of adjacent laminations. The apertures define a plurality of cooling-fluid passageways through the lamination stack, and gaps between the adjacent laminations are sealed to prevent a liquid cooling fluid in the passageways from escaping between the laminations. The gaps are sealed by injecting a heat-cured sealant into the passageways, expelling excess sealant, and heat-curing the lamination stack. The apertures of each lamination can be coincident with the same-sized apertures of adjacent laminations to form straight passageways, or they can vary in size, shape and/or position to form non-axial passageways, angled passageways, bidirectional passageways, and manifold sections of passageways that connect a plurality of different passageway sections. Manifold members adjoin opposite ends of the lamination stack, and each is configured with one or more cavities to act as a manifold to adjacent passageway ends. Complex manifold arrangements can create bidirectional flow in a variety of patterns.
Rippel; Wally E. (Altadena, CA), Kobayashi; Daryl M. (Monrovia, CA)
Aerovironment, Inc. (Monrovia, CA)
10/ 431,324
May 6, 2003
This invention was made with Government support under grant DE-FG03-00ER829-40 awarded by the Department of Energy. The Government has certain rights in this invention.