Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1995-12-27
1997-09-02
Dougherty, Thomas M.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 67R, 310 68R, 310DIG6, 310 89, 310 62, H02K 500, H02K 2900
Patent
active
056636040
ABSTRACT:
A brushless motor for use as a fan motor or the like has a housing, a bearing tower provided inside the housing, a stator fixed on a circumference of the bearing tower, a rotor having a shaft rotatably supported by a bearing inside the bearing tower, a rotor magnet provided on the rotor and opposed to the stator, and a circuit base on which a drive control circuit for controlling the rotation of the rotor by controlling a current supplied to the stator is formed. The housing is provided with a supporting plate for supporting the bearing tower. This supporting plate is recessed in an axial direction relative to a bottom surface of the housing, and supports the bearing tower so that the bearing tower projects inwardly from the supporting power in the axial direction. The circuit base is mounted on a surface of the supporting plate opposite from the bearing tower. If this structure is adopted, the overall size of the motor can be reduced while the desired mounting area of the circuit base is maintained.
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Dougherty Thomas M.
Mullins Burt
Nidec Corporation
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