H - Electricity – 02 – K
Patent
H - Electricity
02
K
310/130, 310/29,
H02K 9/06 (2006.01) H02K 5/10 (2006.01) H02K 5/14 (2006.01) H02K 11/04 (2006.01) H02K 19/36 (2006.01)
Patent
CA 1257637
SEMI ENCLOSED ALTERNATOR Abstract An inexpensive semi enclosed alternator (10) provides high power prolonged operation in environments having particle contamination in the ambient atmosphere. An alternator housing (11) has front and rear housing portions (12, 13), and a drive shaft (14) carrying a rotor assembly (,18) is within the housing. A drive shaft extension (16) from the housing (11) has a fan assembly (32) attached thereto. The rear housing portion (13) comprises cylindrical sidewalls (26) joined to a closed end portion (27) and forms an air sealed cavity (27a) except for an open end (28) facing the front housing portion (12). The front housing portion comprises cylindrical sidewalls (29), having through-openings (33) therein, which terminate in a first end opening (31), facing rear housing open end (28), and a substantially open second end opening (30) facing the fan assembly and the ambient atmosphere. Preferably rotor and stator assemblies (18, 19), and rectifying diodes (20), are positioned within the housing (11) substantially between the through-openings (33) and the closed end portion (27) of the rear housing. During normal drive shaft rotation, the fan assembly draws cooling ambient air into the housing (11) through the through-openings (33), and this air is then drawn out of the housing through the second end opening (30) of the front housing portion. This causes cooling air turbulence within the housing while not directly exposing most internal alternator components to particle contamination in the ambient atmosphere. A voltage regulator (22) is provided in a sealed protective cavity (41) external to the internal cavity (27a). A heatsink (44) which is part of the voltage regulator is utilized to form part of the walls (40, 42) that create the protective cavity.
499793
Nordbrock Raymond E.
Ocken Alfred G.
Gowling Lafleur Henderson Llp
Prestolite Electric Incorporated
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