Axial air gap brushless alternator

Details Axial air gap brushless alternator Axial air gap brushless alternator

H - Electricity

02

K

310/65

H02K 1/06 (2006.01) H02K 7/18 (2006.01) H02K 19/24 (2006.01)

Patent

CA 1223624

Abstract A brushless alternator is disclosed having a stationary field coil and core surrounded by a stationary stator coil and core with a cylindrical air gap being defined therebetween. A rotor assembly is fixed to a rotatable shaft and has interweaved separate magnetic finger assemblies joined together by a non-magnetic ring wherein these fingers are rotated in the cylindrical gap. The stator and field cores are radially disposed with respect to the rotatable shaft. The field core axially extends beyond the effective axial length of the field coil and provides at an axial position beyond the effective axial length of the field coil, at least one low reluctance axial flux gap between the field core and the magnetic fingers. This flux gap conducts a substantial portion of the flux created by the field coil. The field core also serves as a shaft bearing retainer and has a bearing grease reservoir comprising a cylindrical recess adjacent the shaft bearing.

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