Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1997-10-08
1999-06-29
Dougherty, Thomas M.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 43, 310 90, 310 91, 384192, 384202, 384210, 384270, H02K 524, H02K 5167, F16C 2304
Patent
active
059172584
ABSTRACT:
A high speed electric motor for automotive applications that is designed to effectively minimize vibration of its component parts and thus suppress noise generated during its operation. The motor incorporates acoustic engineering principles including surface vibration control, acoustic radiation efficiency, active intensity field control and noise control using acoustic materials to reduce overall vibration of the motor components and the motor noise sensed by the passenger of the vehicle. In one aspect, a bearing assembly for an electric motor is disclosed. The electric motor is of the type including a housing defining an internal chamber, an armature disposed within the internal chamber and having a rotatable shaft, and magnet means for inducing rotational movement of the armature shaft. The bearing assembly includes a bearing member for supporting the armature shaft for rotational movement and a bearing housing defining an internal bore that accommodates at least a portion of the bearing member. The bearing housing may comprise a vibration energy absorbing material, and is dimensioned such that an inner wall portion of the bearing housing defining the internal bore is in contacting engagement with an outer surface of the bearing member to facilitate absorption of vibration energy from the bearing member.
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Horski Marek
Kershaw Peter A.
Periyathamby Haran K.
Dougherty Thomas M.
Nguyen Tran N.
Siemens Canada Limited
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