Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2007-01-18
2008-11-11
Mullins, Burton (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S058000
Reexamination Certificate
active
07449806
ABSTRACT:
According to the present invention, a brushless alternator includes a stationary field winding, a rotor with a rotary shaft, a bearing rotatably supporting an end portion of the rotary shaft, a stator, a protective cover, and a rectifier covered by the protective cover. The rectifier includes a plurality of main rectifying elements for providing a DC output of the alternator, a heat sink having the main rectifying elements provided thereon and working to dissipate heat generated by the main rectifying elements, and a plurality of auxiliary rectifying elements for supplying DC field current to the field winding. The auxiliary rectifying elements are arranged in an axial space between the bearing and the protective cover and kept away from the heat sink. With such an arrangement, it is possible to minimize heat transfer from the heat sink to the auxiliary rectifying elements, thereby minimizing the temperature of the auxiliary rectifying elements.
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Denso Corporation
Mok Alex W
Mullins Burton
Oliff & Berridg,e PLC
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