Refrigerant compressor magnetic bearing

摘要

A magnetic bearing assembly includes a lamination stack with coil apertures extending between opposing sides. A continuous unitary insulation layer is overmolded onto the opposing sides and within the coil apertures providing a coil aperture lining. The insulation layer includes a wall within the coil aperture adjoining coil aperture lining and bisecting the coil aperture into first and second openings. A coil portion is disposed in each of the first and second openings and electrically isolated from one another by the wall. The magnetic bearing assembly is arranged in a refrigerant compressor that includes an electric motor rotationally configured to rotationally drive an impeller via a shaft. A controller is in communication with the magnetic bearing and configured to energize the coils and provide a magnetic field rotationally supporting the shaft.

主权项

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.