Refrigerant compressor including insulation for magnetic bearing assembly

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 having a plurality of apertures, and wherein an insert at least partially extends into a first one of the apertures to prevent direct contact between first and second coils within the first aperture,
• wherein the insert includes a first leg extending into a slot formed in the lamination stack,
• wherein the insert includes a second leg radially spaced-apart from the first leg,
• wherein the second leg extends axially into the first aperture and is sized and shaped so as to prevent contact between the first and second coils within the first aperture,
• wherein the first and second legs project from a first annular cover,
• wherein the first annular cover radially overlaps a first axial end of the first and second coils,
• wherein a second annular cover is connected to free ends of the first and second legs, and
• wherein the second annular cover radially overlaps a second axial end of the first and second coils.

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 coated with an insulative material,
• wherein the lamination stack includes coil apertures extending axially between opposed axial faces of the lamination stack,
• wherein a plurality of coils pass through the coil apertures between the opposed axial faces,
• wherein an insert at least partially extends into a first coil aperture to prevent direct contact between first and second coils,
• wherein the insert includes a first leg extending into a slot formed in the lamination stack,
• wherein the slot is radially outward of the first coil aperture,
• wherein the insert includes a second leg radially spaced-apart from the first leg, and
• wherein the second leg extends axially into the first coil aperture and is sized and shaped so as to prevent direct contact between the first and second coils within the first coil aperture.