US 11,698,076 B2
Refrigerant compressor including insulation for magnetic bearing assembly
Delvis Anibal Gonzalez, Tallahassee, FL (US); and Lin Xiang Sun, Tallahassee, FL (US)
Assigned to Danfoss A/S
Filed by Danfoss A/S, Nordborg (DK)
Filed on Jan. 13, 2022, as Appl. No. 17/574,606.
Claims priority of provisional application 63/149,406, filed on Feb. 15, 2021.
Prior Publication US 2022/0260082 A1, Aug. 18, 2022
Int. Cl. F04D 25/06 (2006.01); F04D 29/048 (2006.01); H02K 7/09 (2006.01); F16C 32/04 (2006.01)
CPC F04D 25/06 (2013.01) [F04D 29/048 (2013.01); F16C 32/048 (2013.01); H02K 7/09 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A refrigerant compressor comprising:
an electric motor configured to rotationally drive an impeller via a shaft; and
a radial magnetic bearing assembly including a lamination stack and a plurality of coils arranged relative to the stack, and wherein an annular cover covers an axial face of the coils,
wherein the annular cover comprises:
a first leg configured to extend into a slot formed in the lamination stack, and
a second leg radially spaced-apart from the first leg and configured to extend axially into a coil aperture of the lamination stack, wherein the second leg is sized and shaped so as to prevent contact between adjacent coils within the coil aperture.