Auxiliary bearing assembly for reduction of unwanted shaft volta

Details Auxiliary bearing assembly for reduction of unwanted shaft volta Auxiliary bearing assembly for reduction of unwanted shaft volta

1997-11-21

1999-06-22

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310 90, 439 17, H02K 708, H02K 1100

Patent

active

059145471

ABSTRACT:
An auxiliary bearing assembly is used to ground the shaft of an electric motor to reduce unwanted currents in the motor bearings. An auxiliary bearing is either initially mounted onto the housing of the motor or retrofitted to attach the motor, so that the shaft of the motor is in electrical and mechanical contact with the center bore of the auxiliary bearing. An electrically conductive grease is then applied via the auxiliary bearing to the shaft of the bearing that is joined to the rotor shaft. A low resistance path to ground is thereby created for the dissipation of the unwanted shaft voltages and consequently prevents harm to the machine.

REFERENCES:
patent: 4006954 (1977-02-01), Ikawa et al.
patent: 4106830 (1978-08-01), Surgatz
patent: 5139425 (1992-08-01), Daviet et al.
patent: 5313129 (1994-05-01), Stewart
patent: 5454724 (1995-10-01), Kloeppel et al.

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