US 11,699,941 B2
Method and apparatus for providing motor with shaft ground
Steven R. Palmer, Highland, IL (US); Jeffrey Scott Sherman, Creve Coeur, MO (US); Chuck Roessler, St. Louis, MO (US); and Mark C. Dierkes, O'Fallon, MO (US)
Assigned to Nidec Motor Corporation, St. Louis, MO (US)
Filed by Nidec Motor Corporation, St. Louis, MO (US)
Filed on Aug. 25, 2020, as Appl. No. 17/2,510.
Prior Publication US 2022/0069677 A1, Mar. 3, 2022
Int. Cl. H02K 11/40 (2016.01); H02K 5/173 (2006.01); H02K 5/22 (2006.01)
CPC H02K 11/40 (2016.01) [H02K 5/225 (2013.01); H02K 5/1732 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of electrically grounding a rotor shaft of an electric motor, said method comprising the steps of:
(a) removing a first lockplate fastener from a motor endshield and an internal bearing lockplate, while a second lockplate fastener remains coupled to the motor endshield and internal bearing lockplate such that the internal bearing lockplate stays secured along an interior side of the motor endshield;
(b) positioning a mounting plate of a shaft ground assembly along an exterior side of the motor endshield, the mounting plate supporting a shaft ground, the shaft ground including a conductive element configured to electrically couple to the rotor shaft; and
(c) replacing the first lockplate fastener with a first mounting plate fastener coupled to the mounting plate, motor endshield, and bearing lockplate to thereby secure the mounting plate along the exterior side of the endshield and secure the bearing lockplate along the interior side of the motor endshield.