The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 1999
Filed:
Oct. 08, 1997
Haran K Periyathamby, London, CA;
Marek Horski, London, CA;
Siemens Canada Limited, Chatham, CA;
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 mounting flange is disclosed for mounting an electric motor of the type including a housing defining an internal chamber, an armature disposed within the internal chamber and having an armature shaft mounted for rotational movement by at least one bearing and magnet means for inducing rotational movement of the armature shaft. The mounting flange includes a flange member defining a central axis and having a central opening dimensioned to accommodate the housing of the motor and an outer portion arranged about the central axis. The outer portion includes a stamped pattern having at least one depressed portion configured to minimize vibration energy transfer. In particular, the stamped pattern functions to divide the flange member into a plurality of sections, which, in effect, separates the large vibrating energy transferred to the flange member into smaller vibrating sources. In addition, the stamped pattern works to reduce the overall noise level by making use of the phase variation between the created small vibrating elemental sources. Furthermore, the stamped pattern effectively stiffens the flange to also reduce surface vibration levels.