초록 ▼

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 eff

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.

대표청구항 ▼

[ We claim:] [1.] An electric motor for automotive applications that exhibits minimal acoustic noise radiation, which comprises:a housing having front and rear ends, and an internal chamber;an armature shaft;an end cap mounted adjacent the rear end of the housing to substantially enclose the interna

[ We claim:] [1.] An electric motor for automotive applications that exhibits minimal acoustic noise radiation, which comprises:a housing having front and rear ends, and an internal chamber;an armature shaft;an end cap mounted adjacent the rear end of the housing to substantially enclose the internal chamber of the housing, the end cap comprising:a hub extending radially outwardly with respect to a cylindrical section of said housing, anda stamped pattern including a series of alternating axial raised portions and depression portions located in an inner peripheral surface of said hub;a brush card assembly proximate the end cap, the brush card assembly including a brush card mount and a brush card supported by the brush card mount; andat least one bearing assembly including:a bearing member that supports an end portion of the armature shaft; anda bearing housing having an internal bore defining a receiving wall portion to accommodate at least a portion of the bearing member, the bearing housing being dimensioned such that the receiving wall portion of the bearing housing is in contacting engagement with an outer surface of the bearing member to facilitate absorption of vibration energy from the bearing.