Cooling arrangements for rotating electrical machines

Details Cooling arrangements for rotating electrical machines Cooling arrangements for rotating electrical machines

H - Electricity

02

K

H02K 9/02 (2006.01) H02K 1/20 (2006.01) H02K 1/32 (2006.01) H02K 3/24 (2006.01) H02K 9/18 (2006.01) H02K 17/16 (2006.01)

Patent

CA 2148213

A rotating electrical machine has openings (105) in its stator teeth (101) occupying a substantial part of the surface area of each tooth so that the stator windings (103) have only a short thermal path to axial cooling ducts created by the openings. In another embodiment, each rotor tooth (109) is provided with a recess (110) at one corner of the tooth to form a recess axial cooling duct; the recess may be of such a depth as to expose part of an adjacent slot (118) to the recess duct. Cooling is by air, either in a single-ended or a double-ended axial ventilation system.

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