Emerson Electric Company

Nidec Motor Corporation

Timothy J Druhe

David M Lyle

Kenneth R Theis

Joel W Northwall

An enclosure for a ground ring includes an enclosure housing configured to accept a ground ring and hold the ground ring in a predetermined position around a shaft that is electrically connected to a drive shaft of an electric motor. The ground ring having a first opening for the drive shaft and the enclosure housing has a second opening for the drive shaft. The enclosure includes an attachment configured to hold the enclosure housing around the shaft to dissipate an electrical charge and to form a cavity that contains the ground ring and includes a predetermined gap between a perimeter of the second opening of the enclosure and a surface of the drive shaft.

Ground ring and enclosure in an electric motor

A vibration dampening brace for a motor enables altering the stiffness and reed critical frequency of a combined system of the motor and driven equipment without removal of the motor from a motor stand or support structure. The vibration dampening brace includes a first member configured to engage a portion of a housing of an electrical motor and a second member operatively connected to the first member to stiffen the bending moment of the electrical motor housing, resulting in the housing moving less with the vibrations generated by the combined system of the motor and the driven equipment. The vibration dampening brace alters the RCF of the motor system by a predetermined amount to modify the RCF of the combined system and ensure that the RCF of the combined system is outside a range of vibration frequencies that would amplify the motor vibrations.

Frequency altering brace for an electric motor

Cover for electric motor

A three phase, dual voltage electric motor connection board is provided with pluralities of electric terminals that project from opposite exterior and interior surfaces of the connection board, where only those electric terminals projecting from the connection board exterior surface are accessible by the end user of the motor. Only those motor lead wires that are changed when connecting between a low voltage application and a high voltage application of the motor are connected to the electric terminals on the connection board exterior surface. The remaining motor lead wires are connected to the electric terminals on the connection board interior surface. Electric terminals for connection with separate power supply wires are also provided on the connection board exterior surface.

Three phase electric motor terminal box mounted connection board

An electric motor having a cover which is removably mounted to an endshield of the motor and defines an enclosure for electronic components. The cover has an overlapping fit against a wall of the endshield to prevent entry of moisture or contaminants into the enclosure. The cover provides unhindered access to fasteners for connecting the motor to an adjacent part, such as a pump, so that the cover may remain mounted on the endshield while the motor is attached to the pump. Indentations in the cover are positioned at the fasteners, and corresponding recesses are provided in the wall of the endshield.

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Granite City, IL, United States of America

Timothy J Druhe