Abstract: A design method for a six-pole hybrid magnetic bearing with symmetrical suspension forces. A magnetic bearing is designed by taking particularity that a permanent magnet of the six-pole hybrid magnetic bearing with symmetrical suspension forces forms magnetic polarity on a stator suspension tooth as the starting point and taking maximum suspension forces in x and y directions and a saturation magnetic density as constraint conditions. Compared with a method for designing the maximum radial suspension force in a +x direction in a manner that a saturation magnetic induction intensity is reached in the +x direction and the magnetic induction intensity in a ?x direction is zero in existing design of a six-pole hybrid magnetic bearing, this method enables the maximum magnetic suspension forces in the +x and +y directions to be same, so that the radial suspension forces of the six-pole hybrid magnetic bearing are designed to be completely symmetrical.

Abstract: An external winding controlled two-degree-of-freedom bearing-free switched reluctance motor includes a stator and a rotor. An edge portion of the rotor includes rotor teeth. The stator includes an external winding and a stator core. The stator core includes four suspension teeth distributed in x and y directions on the same circumference of the radial outer side of the rotor and magnetism isolating bodies connected to two adjacent suspension teeth, each suspension tooth includes, along the axial direction of the rotor, a permanent magnet sheet and magnetically conductive sheets symmetrically connected to two sides of the permanent magnet sheet, torque teeth are connected to the inner walls of the magnetism isolating bodies, and torque windings are wound around the torque teeth. The external winding includes x-direction control cores connecting two suspension teeth in the x direction to form two x-direction symmetrical closed paths.

Abstract: An external winding controlled two-degree-of-freedom bearing-free switched reluctance motor includes a stator and a rotor. An edge portion of the rotor includes rotor teeth. The stator includes an external winding and a stator core. The stator core includes four suspension teeth distributed in x and y directions on the same circumference of the radial outer side of the rotor and magnetism isolating bodies connected to two adjacent suspension teeth, each suspension tooth includes, along the axial direction of the rotor, a permanent magnet sheet and magnetically conductive sheets symmetrically connected to two sides of the permanent magnet sheet, torque teeth are connected to the inner walls of the magnetism isolating bodies, and torque windings are wound around the torque teeth. The external winding includes x-direction control cores connecting two suspension teeth in the x direction to form two x-direction symmetrical closed paths.