General Electric Company

Regal Beloit America, Inc.

Harald E Blaettner

Eldon R Cunningham

Joseph Eugene Miller

Michael J Usher

Guillermo Wille

Richard F Uhen

Robert E Ellis

Bernd A Wieland

Donald B Pedigo

John C Hann

A bearing assembly cooperates with a bearing seat formed in a bearing housing and includes a bearing having an inner ring, an outer ring and a rolling element in engagement with the rings and an anti-rotation device. The anti-rotation device engages the outer ring to the bearing housing limiting rotation of the outer ring within the bearing seat. The anti-rotation device includes a first feature engaging the outer ring and a second feature engaging the bearing housing. The features limit the rotation of the outer ring within the bearing seat. The first feature has a resilient protrusion with a contact surface for engagement with the outer ring.

Electric machine and associated method

A stator yoke formed with a plurality of layers of similarly sized metal sheets is disclosed. A plurality of gaps extend through the stator yoke between ends of the metal sheets. The gaps decrease in size from an outer layer to an inner layer of the stator yoke. The stator yoke can be formed to have a limited tolerance even when the metal sheets do not have limited tolerances.

Laminated stator yokes

A brush warning indicator for an electric motor is described. The brush warning indicator includes a contact spring having a non-conductive bushing connected to a conductive member. The contact spring is connected to a brush yoke by a terminal. The non-conductive bushing contacts a brush in a brush holder and biases the contact spring in relation to the brush holder. Once the brush moves beyond a predetermined point, the conductive member contacts a contact rivet and relays a voltage to a remote location where an indicator signals that the brush has worn beyond the predetermined point.

Brush warning indicator and methods for indicating brush wear-out

Disclosed is an improvement to the stability of D.C. motor brushes mounted in brush boxes with wings is improved by angling the wings toward the commutator such that the brush spring contacts the brush at one or more points intermediate the ends of the brush. Improved cooling is provided by utilizing an end plate with apertures and a brush plate which in combination with the commutator, provides a brush plate aperture for cooling air flow. In a preferred embodiment, speed variations of the motor can be achieved by selectively disconnecting one or more brushes in a four brush embodiment reducing the torque and rotating speed of the motor. In a preferred embodiment, the use of a diode to interconnect same polarity brushes permits a speed change to be accomplished by selectively connecting one or the other end of the diode. In a further preferred embodiment, the stalling of the motor having power applied is indicated by an electronic output where voltage applied to one brush is filtered through an RC filter with the output amplified and voltage doubled. A ripple output indicating that the motor is rotating after amplification will light a light emitting diode indicating proper operation of the motor.

Permanent magnet direct current motor

A structured product family of dynamoelectric machines for use in a plurality of applications has a frame with a closed end, and a set of permanent magnets is adhesively secured within the frame. An armature disposed in the frame for interaction with the permanent magnets includes a shaft, a core having a set of winding receiving slots therein, and a commutator. During manufacturing and assembly, stress on the motor shaft and commutator is minimized. A brush plate is associated with the frame for locating a set of brushes relative to the commutator, and an end shield is secured to the frame opposite its closed end. At least one freely aligning bearing assembly disposed in the end shield for freely aligning the shaft and including a bearing and a retainer having predetermined conditions preset with the retainer being adhesively secured to the end shield. A bracket is adhesively secured to the frame for connecting the dynamoelectric machine in anyone of the applications; and a novel brush assembly is provided.

Vibration reduction system for an electric motor

An improved cooling arrangement for a dynamoelectric machine of the type having a plurality of stacked laminations forming a stator core. The stacked laminations have a central bore for passage of a rotor therethrough and a plurality of uniformly spaced winding slots extending radially outward from the bore and terminating at an end at least partially through the laminations. Adjacent ones of the slots define pole pieces extending from the bore into a radially outer portion of the laminations. The improvement comprises a plurality of cooling air passages extending axially through the stacked laminations generally parallel to the central bore with each of the air passages being positioned adjacent the terminating end of a corresponding one of the winding slots. Each air passage has a radially outer shape corresponding generally to a radially outer shape of the winding slots and preferably have a crescent shape when viewed axially.

Lamination for a dynamoelectric machine with improved cooling capacity

Structured product dynamoelectric machine

A structured product family of dynamoelectric machines for use in a plurality of applications has a frame with a closed end, and a set of permanent magnets is adhesively secured within the frame. An armature disposed in the frame for interaction with the permanent magnets includes a shaft, a core having a set of winding receiving slots therein, and a commutator. During manufacturing and assembly, stress on the motor shaft and commutator is minimized. A brush plate is associated with the frame for locating a set of brushes relative to the commutator, and an end shield is secured to the frame opposite its closed end. At least one freely aligning bearing assembly disposed in the end shield for freely aligning the shaft and including a bearing and a retainer having predetermined conditions preset with the retainer being adhesively secured to the end shield. A bracket is adhesively secured to the frame for connecting the dynamoelectric machine in anyone of the applications; and a novel brush assembly is provided. Specifically, four members attached to the brush boxes are inserted through the D slots and are then crimped so that minimum stress is introduced into the brush plate. The armature commutator is first rough finished, the armature is then balanced and the commutator surface is final finished last prior to assembly into the frame. The motor has a relatively stiff end shield having a freely aligning bearing adhesively connected therein. The freely-aligning bearing has a predetermined set of conditions preset and held therein by an adhesive. These predetermined conditions are repeatedly duplicated in a plurality of end shields. An axial vibration reduction means which comprises in part a thrust compensation system is operative to bias the armature toward the bearing means in the frame and thus reduce the noise generated by the axial movement of the armature. A mounting flange is adhesively connected to the frame. Also disclosed are methods of assembling various subcomponents such as the commutator to the shaft, the magnets to the frame and the freely-aligning bearing means in the frame and end shield sockets.

Growing community of inventors

Fort Wayne, IN, United States of America

Harald E Blaettner