The invention provides a magnetic suspension bearing of a
hybrid magnetic circuit, which relates to the technical field of magnetic suspension bearings. The invention overcomes the defects of large
electric power, large volume and
heavy weight of the existing magnetic suspension bearing. Four
stator teeth in a
stator core in the magnetic suspension bearing of the
hybrid magnetic circuit of the invention are uniformly distributed on the inner surface of an annular yoke in an angle of 90 degrees, and the width Wt of the
stator teeth in the circumferential direction meets the following condition: Wt<pi Di / 4, wherein Di represents the inner
diameter of the stator core. A
magnetism gathering yoke of a permanent
magnet is arranged between the tooth ends of every two adjacent stator teeth facingan air gap, a parallel slot is formed on the bisector of the
magnetism gathering yoke of the permanent
magnet along the radial direction, a permanent
magnet in a flat structure is embedded in the slot, and the permanent magnet is magnetized in parallel along the tangential direction. A rotor is cylindrical or tubular and is composed of a
magnetism guiding ring and a rotating shaft, and the magnetism guiding ring is sleeved outside the cylindrical or tubular rotating shaft. The magnetic suspension bearing of the
hybrid magnetic circuit of the invention has the advantages of low loss, low temperature rise,
good control characteristic, small volume, light weight and wide application prospect.