CN111130229A

CN111130229A - Novel double-stator bearingless switched reluctance motor

Info

Publication number: CN111130229A
Application number: CN202010025829.2A
Authority: CN
Inventors: 陆楣; 邵利
Original assignee: Zhejiang YAT Electrical Appliance Co Ltd
Current assignee: Zhejiang YAT Electrical Appliance Co Ltd
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-05-08

Abstract

The invention relates to a novel double-stator bearingless switched reluctance motor which comprises an outer stator iron core, an inner stator iron core, a rotor iron core, a suspension force winding and a torque winding, wherein the outer stator iron core is provided with a torque pole; the invention has the advantages that: the torque winding is installed on the outer stator iron core through the torque pole, the suspension force winding is installed on the inner stator iron core through the suspension force pole, and the magnetic isolation interlayer is arranged on the rotor iron core, so that a magnetic field magnetic circuit for generating torque by the outer stator and a magnetic field magnetic circuit for generating suspension force by the inner stator are completely separated, the torque and the suspension force can be respectively and independently controlled, decoupling control of the suspension force and the torque of the bearingless switched reluctance motor is realized, the decoupling degree is higher, the control difficulty is reduced, and the use efficiency of the motor is improved.

Description

Novel double-stator bearingless switched reluctance motor

Technical Field

The invention relates to the technical field of motors, in particular to a novel double-stator bearingless switched reluctance motor.

Background

With the rapid development of modern industry, high-speed and ultra-high-speed motors are more and more emphasized, but the friction resistance of the traditional motor using a mechanical bearing is more and more large along with the increase of the rotating speed, the abrasion is aggravated, the heat is serious, and the working efficiency and the service life of the motor are greatly reduced. The switched reluctance motor is a doubly salient single excitation motor, has simple structure and high reliability, the operation principle follows the principle of minimum magnetic circuit, is suitable for high-speed application occasions, has considerable development prospect, and the bearingless motor utilizes the similarity of the structure of the magnetic suspension bearing and the structure of the stator of the motor to lap and wind the winding generating suspension force and the winding generating torque on the stator together, so that the motor has the self-suspension capacity of a rotor while rotating, has no friction loss and can solve the problems caused by a mechanical bearing.

Bearingless switched reluctance motors have both the advantages of bearingless motors and switched reluctance motors, but have some problems that have hindered their development. As shown in fig. 1, for a magnetic flux path diagram of an existing double-stator bearingless switched reluctance motor, since the levitation force winding and the torque winding are simultaneously wound on one stator, interference and consumption inevitably exist between a magnetic field magnetic circuit generating torque and a magnetic field magnetic circuit generating levitation force, so that difficulty in controlling torque and levitation force is greatly increased, and motor efficiency is also reduced.

Disclosure of Invention

The invention aims to provide a novel double-stator bearingless switched reluctance motor, which can completely separate a torque magnetic field magnetic circuit from a suspension force magnetic field magnetic circuit and realize decoupling control of suspension force and torque of the bearingless switched reluctance motor.

In order to solve the technical problems, the invention is realized by the following technical scheme: the utility model provides a novel two stator does not have bearing switched reluctance motor, includes outer stator core, inner stator core, rotor core, suspension force winding and torque winding, be equipped with the torque pole of installation torque winding on the outer stator core, be equipped with the suspension force pole of installation suspension force winding on the inner stator core, rotor core sets up between outer stator core and inner stator core, and is equipped with on the rotor core and separates the magnetism intermediate layer.

Preferably, twelve torque poles are arranged on the outer stator core, and each torque pole is wound with a torque winding.

Preferably, four groups of suspension force poles are arranged on the inner stator iron core, each group of suspension force poles comprises a main suspension force pole and two auxiliary poles, and each main suspension force pole is wound with the suspension force winding.

Preferably, a deflection angle deflected to the main suspension force pole is arranged between the auxiliary pole and the main suspension force pole.

Preferably, the outer side wall of the rotor core is provided with salient poles.

Preferably, the outer side wall of the magnetism isolating interlayer is provided with convex teeth, and the inner side wall of the magnetism isolating interlayer is provided with grooves corresponding to the convex teeth.

In conclusion, the invention has the advantages that: the torque winding is installed on the outer stator iron core through the torque pole, the suspension force winding is installed on the inner stator iron core through the suspension force pole, the torque winding and the suspension force winding can be installed on the outer stator iron core and the inner stator iron core relatively independently, and the magnetic isolation interlayer is arranged on the rotor iron core, so that a magnetic field magnetic circuit for generating torque by the outer stator and a magnetic field magnetic circuit for generating suspension force by the inner stator are completely separated, the torque and the suspension force can be respectively and independently controlled, decoupling control of the suspension force and the torque of the bearingless switched reluctance motor is realized, the decoupling degree is higher, the control difficulty is reduced, and the use efficiency of the motor is improved.

Drawings

The invention will be further described with reference to the accompanying drawings in which:

fig. 1 is a magnetic flux path diagram of a conventional double-stator bearingless switched reluctance motor;

FIG. 2 is a schematic structural diagram of a novel double-stator bearingless switched reluctance motor according to the present invention;

FIG. 3 is a schematic structural view of a rotor core according to the present invention;

FIG. 4 is a schematic structural view of an inner stator core according to the present invention;

fig. 5 is a magnetic flux path diagram of a dual stator bearingless switched reluctance motor of the present invention.

Reference numerals:

the magnetic field generator comprises an outer stator iron core 1, a torque pole 11, an inner stator iron core 2, a suspension force pole 21, a main suspension force pole 22, an auxiliary pole 23, a rotor iron core 3, a salient pole 31, a suspension force winding 4, a torque winding 5, a magnetic isolation interlayer 6, a convex tooth 60 and a groove 61.

Detailed Description

As shown in fig. 2, fig. 3, fig. 4, and fig. 5, a novel double-stator bearingless switched reluctance motor includes an outer stator core 1, an inner stator core 2, a rotor core 3, a suspension force winding 4, and a torque winding 5, wherein a torque pole 11 for mounting the torque winding 5 is disposed on the outer stator core 1, a suspension force pole 21 for mounting the suspension force winding 4 is disposed on the inner stator core 2, the rotor core 3 is disposed between the outer stator core 1 and the inner stator core 2, and a magnetic isolation interlayer 6 is disposed on the rotor core 3.

The torque winding 5 is installed on the outer stator iron core 1 through the torque pole 11, the suspension force winding 4 is installed on the inner stator iron core 2 through the suspension force pole 21, the torque winding and the suspension force winding can be installed on the outer stator iron core and the inner stator iron core relatively independently, and the magnetic isolation interlayer 6 is arranged on the rotor iron core 3, so that a magnetic field magnetic circuit of the outer stator generating the torque and a magnetic field magnetic circuit of the inner stator generating the suspension force are completely separated, the torque and the suspension force can be respectively and independently controlled, the decoupling control of the suspension force and the torque of the bearingless switch reluctance motor is realized, the decoupling degree is higher, the control difficulty is reduced, and the use efficiency of the motor is improved.

Twelve torque poles 11 are arranged on the outer stator iron core 1, each torque pole 11 is wound with a torque winding 5, each torque winding 5 is formed by connecting four coils which are uniformly distributed in series, four groups of suspension poles 21 are arranged on the inner stator iron core 2, each group of suspension poles 21 comprises a main suspension pole 22 and two auxiliary poles 23, each main suspension pole 22 is wound with a suspension winding 4, and the auxiliary poles 23 can determine whether coils need to be wound according to the magnitude of the required suspension force, so that specific design is aimed at specific application, cost is reduced while application requirements are met, the structure is more flexible, when only the main suspension pole 22 is provided with the winding, enough radial suspension force can be provided, cost is reduced for saving the coils, and the auxiliary poles 23 do not need to be wound; when only the main suspension force pole 22 is provided with the winding, enough radial suspension force cannot be provided, the winding can be wound on the auxiliary pole 23 in a superposition mode to provide larger radial suspension force for the rotor, a deviation angle deviating from the main suspension force pole is arranged between the auxiliary pole 23 and the main suspension force pole 22, a magnetic flux path can be further shortened, magnetic circuits of the four groups of suspension force poles 21 are independent, control is accurate and simple, particularly when the rotor is eccentric, ideal suspension force can be obtained accurately, and control accuracy is improved in design of the motor body.

The outer side wall of the rotor core 3 is provided with salient poles 31, in addition, the inner side of the rotor core 3 in the embodiment is smooth and free of salient poles 31, the outer side wall of the magnetism isolating interlayer 6 is provided with convex teeth 60, the inner side wall of the magnetism isolating interlayer 6 is provided with grooves 61 corresponding to the convex teeth 60, the number of the convex teeth 60 and the grooves 61 in the embodiment is four, the positions of the convex teeth 60 are located at the central line of the rotor salient poles 31, and the arrangement of the convex teeth 60 not only ensures the firmness of the rotor structure, but also basically does not influence the magnetic path channel of the torque magnetic field; the grooves 61 may also not affect the distribution of the magnetic lines of the levitating force magnetic field.

Other embodiments of the present invention than the preferred embodiments described above will be apparent to those skilled in the art from the present invention, and various changes and modifications can be made therein without departing from the spirit of the present invention as defined in the appended claims.

Claims

1. The utility model provides a novel two stators do not have bearing switched reluctance motor, includes outer stator core, inner stator core, rotor core, suspension force winding and torque winding, its characterized in that: the outer stator core is provided with a torque pole for installing a torque winding, the inner stator core is provided with a suspension pole for installing a suspension winding, the rotor core is arranged between the outer stator core and the inner stator core, and the rotor core is provided with a magnetic isolation interlayer.

2. The novel double-stator bearingless switched reluctance motor according to claim 1, wherein: twelve torque poles are arranged on the outer stator iron core, and each torque pole is wound with a torque winding.

3. The novel double-stator bearingless switched reluctance motor according to claim 1, wherein: four groups of suspension force poles are arranged on the inner stator iron core, each group of suspension force poles comprises a main suspension force pole and two auxiliary poles, and each main suspension force pole is wound with the suspension force winding.

4. The novel double-stator bearingless switched reluctance motor according to claim 3, wherein: and a deflection angle deflected to the main suspension force pole is arranged between the auxiliary pole and the main suspension force pole.

5. The novel double-stator bearingless switched reluctance motor according to claim 1, wherein: and salient poles are arranged on the outer side wall of the rotor core.

6. The novel double-stator bearingless switched reluctance motor according to claim 5, wherein: the outer side wall of the magnetism isolating interlayer is provided with convex teeth, and the inner side wall of the magnetism isolating interlayer is provided with grooves corresponding to the convex teeth.