Double-winding bearingless magnetic flux switching permanent magnet motor

Abstract

The invention discloses a double-winding bearingless magnetic flux switching permanent magnet motor comprising a stator, a rotor and windings. The stator and the rotor have a doubly salient structure and have the axial symmetry. The stator and rotor iron cores are formed by silicon steel plates through lamination. The stator iron core is formed by six U-shaped lamination plates. A tangentially and alternately magnetized permanent magnet is embedded between every two U-shaped lamination plates so as to form a stator tooth together. The windings are centralized windings and are installed on the stator teeth, and the end parts of the windings are small. There are two sets of windings. As for one set of windings, the coils on the two spatially opposite stator teeth are successively connected in series in an end-to-end way to form a phase so as to form the three-phase torque control windings; as for the other set of windings, the coils on the two spatially opposite stator teeth are reversely connected in series to form a phase so as to form the suspension force control windings, and the polarity of the adjacent sides of the adjacent permanent magnets is identical. The double-winding bearingless magnetic flux switching permanent magnet motor has the characteristics of high speed, high power, high efficiency, high power density, high operation stability and high reliability.

Description

technical field [0001] The invention belongs to the technical field of high-speed bearingless motors, and relates to a stator permanent magnet double-winding bearingless flux switching permanent magnet motor. Background technique [0002] High-speed and ultra-high-speed motors are widely used in high-speed machine tools, turbomolecular pumps, high-speed flywheels and other equipment. When supported by mechanical bearings, the frictional resistance caused by the high-speed operation of the rotor increases, which aggravates the wear of the bearings and causes uneven air gaps in the motor. , Winding heating, not only reduces the working efficiency of the motor, shortens the service life of the motor and bearings, but also increases the burden on the maintenance of the motor and bearings. [0003] The proposal of the magnetic bearing motor solves the wear problem of the mechanical bearing, but the magnetic bearing occupies an independent axial space, which makes the axial utiliz...

AI Technical Summary

Problems solved by technology

This increases the losses in the motor, reducing its efficiency

At the same time, its half-cycle energization mode reduces the utilization rate of the winding and the power density of the motor

Images