An axial single degree of freedom bearingless switched reluctance motor

Abstract

The invention discloses an axial single-degree-of-freedom bearingless switched reluctance motor, which includes a rotor and a stator. The rotor includes a rotating shaft and a radial rotor core sleeved on the rotating shaft. The outer circumference of the radial rotor core passes through The radially magnetized permanent magnet ring is connected with an axial rotor core, and several rotor teeth are evenly arranged on both ends of the axial rotor core; the stator includes two stator cores symmetrically arranged on both sides of the rotor, and each stator The iron core is composed of an integral axial part and a radial part, and the inner end of the axial part is uniformly provided with 4 suspension teeth, and a number of axial magnetic isolation blocks uniformly distributed between adjacent suspension teeth. There are two torque teeth, the suspension teeth and the torque teeth are respectively wound with a suspension winding and a torque winding, and the end of the rotating shaft extends to the outside of the stator core. The motor with this structure is small in size, light in weight and compact in structure, providing a new solution for special electric drives.

Description

technical field [0001] The invention relates to the field of magnetic levitation motors with bearingless technology, in particular to an axial single-degree-of-freedom bearingless switched reluctance motor. Background technique [0002] Bearingless motors have no friction, no wear, no lubrication and no seals, and are easy to achieve higher speed and higher power operation. They have broad application prospects in aerospace, turbomolecular pumps, flywheel energy storage, sealed pumps, high-speed electric spindles, etc. . Bearingless motors are mainly divided into three types: bearingless asynchronous (induction) motors, bearingless permanent magnet synchronous motors and bearingless switched reluctance motors. In particular, the bearingless switched reluctance motor has the advantages of simple structure, high mechanical strength, flexible control, good fault tolerance, and good robustness, and has broad application prospects in electric vehicles, general industries, and ho...

AI Technical Summary

Problems solved by technology

[0007] These three structures all need to use axial magnetic bearings alone, which increases the axial length of the system, reduces the critical speed of the system, and limits the further improvement of speed and power. Two sets of windings are wound, that is, the suspension winding and the torque winding, and the number of pole pairs of the two sets of windings must satisfy the relationship of addition and subtraction. There is a strong coupling between moment control and suspension control

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