Patent ID: 9624939
Date: 2017-04-18
CPC Classifications: F04D,F16C,H02K

Claim:
1. A refrigerant compressor comprising: an electric motor configured to rotationally drive an impeller via a shaft; a magnetic bearing assembly including an inner diameter within which the shaft is disposed, the magnetic bearing assembly having a lamination stack with coil apertures extending between opposing sides of the lamination stack, a continuous unitary insulation layer provided within the coil apertures and the opposing sides, and coils disposed within and extending between the coil apertures, wherein the insulation layer provides a coil aperture lining within each coil aperture and a wall formed entirely by the coil aperture lining within each coil aperture, wherein each wall bisects a respective coil aperture into first and second openings, and wherein the coils are disposed within and extend between the coil apertures; and a controller in communication with the magnetic bearing and configured to energize the coils and provide a magnetic field rotationally supporting the shaft.