US 12,463,479 B2
Permanent magnet motor for electrical submersible pump and method of assembly rotor
Ameen Muhammed, Claremore, OK (US); James Christopher Clingman, Broken Arrow, OK (US); and John Knapp, Tulsa, OK (US)
Assigned to Baker Hughes Oilfield Operations LLC, Houston, TX (US)
Filed by Baker Hughes Oilfield Operations LLC, Houston, TX (US)
Filed on Sep. 30, 2022, as Appl. No. 17/957,779.
Claims priority of provisional application 63/251,376, filed on Oct. 1, 2021.
Prior Publication US 2023/0109040 A1, Apr. 6, 2023
Int. Cl. H02K 1/27 (2022.01); F04D 13/08 (2006.01); H02K 1/16 (2006.01); H02K 1/278 (2022.01); H02K 1/28 (2006.01); H02K 15/03 (2006.01)
CPC H02K 1/278 (2013.01) [F04D 13/086 (2013.01); H02K 1/16 (2013.01); H02K 1/28 (2013.01); H02K 15/03 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electrical submersible pump motor, comprising:
a stator having a stack of laminations with windings extending through slots in the laminations, the stator having a central opening with a longitudinal axis;
a shaft extending through the central opening; and
rotor sections mounted along a length of the shaft for rotating the shaft, each of the rotor sections comprising:
a tubular core having a bore keyed to the shaft for rotation in unison, the bore having undercut sections at each end of the core separated by an intermediate bore section of smaller diameter than the undercut bore sections,
the tubular core having an outer surface with an end ring section at each of the ends separated by an outer surface intermediate section,
a pair of end rings, each of the end rings having an initial inner diameter greater than an outer diameter of the end ring sections and being shrunk fit onto one of the end ring sections, and
an array of magnets mounted to the outer surface intermediate section between the end rings.