Conical column type five-degree-of-freedom suspension bearingless switched reluctance motor

Abstract

The invention discloses a conical column type five-degree-of-freedom suspension bearingless switched reluctance motor which comprises a first rotor, a first stator, a second rotor, a second stator anda rotating shaft. End parts of two axial sides of all tooth poles of the first stator and the second stator are of conical inner chamfer structures; the ends of the two axial sides of the first rotorand the second rotor are of a conical outer chamfer structure, and the chamfer area is of a solid cone structure. Excitation of a first winding, a magnetic pull force is generated to act on the rotor; magnetic resistance principle, for a stator and a rotor with a salient pole structure, motor rotation motion can be realized; meanwhile, radial suspension force is generated according to the principle that an inductance flat top area is not changed, for a chamfering area at the end of the motor, a solid cone bears continuous and stable magnetic pull force, force decomposed to the axial directionserves as axial suspension force, and due to the fact that the area of the magnetic pull force borne by the cone is large, the axial bearing force is correspondingly increased, and for a second motor, the same principle is achieved. Rotor rotation motion, radial four-degree-of-freedom suspension and axial suspension functions can be realized by using one set of windings.

Description

technical field [0001] The invention relates to a conical column type five-degree-of-freedom suspension bearingless switched reluctance motor, which belongs to the technical field of magnetic levitation switched reluctance motors of motors. Background technique [0002] In order to promote the application of switched reluctance motors in the field of industrial high-speed motors and reduce the wear and vibration noise of mechanical bearings of motors, magnetic levitation switched reluctance motors came into being to ensure that the rotors can be suspended stably during high-speed operation of the motors. The magnetic levitation switched reluctance motor is composed of a switched reluctance motor, two radial magnetic bearings and an axial magnetic bearing. The switched reluctance motor only provides output torque, and the magnetic bearing provides five degrees of freedom levitation force, but such The solution will inevitably increase the volume of the entire system, reduce t...

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Problems solved by technology

[0002] In order to promote the application of switched reluctance motors in the field of industrial high-speed motors and reduce the wear and vibration noise of mechanical bearings of motors, magnetic levitation switched reluctance motors came into being to ensure that the rotors can be suspended stably during high-speed operation of the motors. The magnetic levitation switched reluctance motor is composed of a switched reluctance motor, two radial magnetic bearings and an axial magnetic bearing. The switched reluctance motor only provides output torque, and the magnetic bearing provides five degrees of freedom levitation force, but such The solution will inevitably increase the volume of the entire system, reduce the power density and critical speed, complicate the control system, increase the difficulty of control, and reduce the reliability of the system

[0003] Starting from the structure of the motor, not only rotation but also levitation can be realized. The bearingless switched reluctance motor has been proposed, but the traditional bearingless switched reluctance motor only considers four-degree-of-freedom levitation. To achieve five-degree-of-freedom levitation, it is bound to To increase the axial magnetic bearing, although the volume of the radial magnetic bearing is reduced, the introduction of the axial magnetic bearing still cannot maximize the power density and critical speed of the magnetic levitation motor

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