Magnetic bearing, compressor and air conditioner

A compressor, comprising a magnetic bearing, the magnetic bearing comprising:

• a radial stator having a plurality of stator teeth extending inwardly in a radial direction of the radial stator;
• two axial stators arranged on two axial sides of the stator teeth, respectively;
• and
• radial control coils wound on the stator teeth, the radial control coils being located outside an area of the stator teeth covered oppositely by the two axial stators;
• wherein each axial stator is configured with a first annular groove on a side facing the stator teeth, and the magnetic bearing further comprises axial control coils arranged in the first annular grooves;
• wherein the first annular grooves have a first groove circumferential wall close to an axis of the axial stator and a second groove circumferential wall far away the axis of the axial stator, the first groove circumferential wall having a diameter D1 and the second groove circumferential wall having a diameter D2, and the magnetic bearing is provided to be assembled with a rotating shaft with a rotor having an outer diameter d, where D2>d>D1.

An air conditioner, comprising a compressor comprising a magnetic bearing, the magnetic bearing comprising:

• a radial stator having a plurality of stator teeth extending inwardly in a radial direction of the radial stator;
• two axial stators arranged on two axial sides of the stator teeth, respectively;
• and
• a radial control coil wound on the stator teeth, the radial control coil being located outside an area of the stator teeth covered oppositely by the two axial stators;
• wherein each axial stator is configured with a first annular groove on a side facing the stator teeth, and the magnetic bearing further comprises axial control coils arranged in the first annular grooves;
• wherein the first annular grooves have a first groove circumferential wall close to an axis of the axial stator and a second groove circumferential wall far away the axis of the axial stator, the first groove circumferential wall having a diameter D1 and the second groove circumferential wall having a diameter D2, and the magnetic bearing is provided to be assembled with a rotating shaft with a rotor having an outer diameter d, where D2>d>D1.