CN110601481B - Birotor permanent magnet synchronous reluctance motor and configuration method - Google Patents
Birotor permanent magnet synchronous reluctance motor and configuration method Download PDFInfo
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- CN110601481B CN110601481B CN201911024121.9A CN201911024121A CN110601481B CN 110601481 B CN110601481 B CN 110601481B CN 201911024121 A CN201911024121 A CN 201911024121A CN 110601481 B CN110601481 B CN 110601481B
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 21
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- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 12
- 238000009434 installation Methods 0.000 claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims abstract description 6
- 230000008859 change Effects 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims description 13
- 230000005389 magnetism Effects 0.000 claims description 11
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 5
- 230000010349 pulsation Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 3
- 230000005764 inhibitory process Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
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- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a double-rotor permanent magnet synchronous reluctance motor and a configuration method thereof, wherein the double-rotor permanent magnet synchronous reluctance motor comprises a rotating shaft, a reluctance rotor, a stator and a permanent magnet rotor from inside to outside, stator grooves are uniformly formed inside and outside the stator, and the stator is arranged between the permanent magnet rotor and the reluctance rotor; the d axis is defined as the center line of ferrite of the permanent magnet rotor, the q axis is defined as the center line of salient poles of the reluctance rotor, and the installation angles of the two rotors on the rotating shaft are defined as the included angle between the d axis and the q axis; the mounting angle between the permanent magnet rotor and the reluctance rotor is adjusted to change the superposition mechanism of the torque components so that the permanent magnet torque and the reluctance torque reach their maximum values at the same current phase angle. On the premise of not increasing the mechanical manufacturing and cooling difficulty of the motor, the electromagnetic performance such as electromagnetic torque, power density, efficiency and torque pulsation inhibition are comprehensively improved, and the rotor has flexible structural design, simple processing technology and high mechanical strength.
Description
Technical Field
The invention belongs to the field of motor equipment, and particularly relates to a double-rotor permanent magnet synchronous reluctance motor and a configuration method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Permanent magnet motors are widely used in various fields due to their high torque density, high efficiency, etc. However, rare earth permanent magnet materials have problems of high price, limited supply, and the like, which bring great challenges to the development of permanent magnet motors. Therefore, it is imperative to study high performance motors with fewer or zero rare earth permanent magnets.
Synchronous reluctance motors are considered as one of the alternatives because they do not use permanent magnets, the rotor is structurally strong and low cost, but they reduce torque density, efficiency and power factor compared to permanent magnet motors. In order to improve the performance of the synchronous reluctance motor, a proper amount of permanent magnets can be inserted into the rotor magnetic barrier of the synchronous reluctance motor, so that a permanent magnet auxiliary type synchronous reluctance motor is researched. In particular, permanent magnet assisted synchronous reluctance with ferrite assistance is attractive due to its low cost, high torque density and wide speed regulation range.
However, researchers have also found that permanent magnet assisted synchronous reluctance motors have some drawbacks in that the total torque is divided into two parts, permanent magnet torque and reluctance torque, which reach respective maximum values at different current phase angles, respectively, which are theoretically 45 ° apart, as shown in fig. 1. Therefore, the two torque components cannot be fully utilized to obtain the total torque. Asymmetric permanent magnets and asymmetric magnetically isolated bridge designs are applied to these motors to further improve motor performance by maximizing permanent magnet torque and reluctance torque at the same current phase angle. However, these motors are not only complex in structure, but also weak in air gap flux density and with higher harmonics, resulting in low permanent magnet torque and high torque ripple. In addition, the inserted permanent magnets deteriorate the stress conditions of the magnetically isolated bridge ribs and limit the magnetically isolated bridge design at a relatively low significant ratio.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the double-rotor permanent magnet synchronous reluctance motor, which comprehensively improves electromagnetic torque, power density, efficiency, torque pulsation inhibition and other electromagnetic performances on the premise of not increasing the mechanical manufacturing and cooling difficulty of the motor.
To achieve the above object, one or more embodiments of the present invention provide the following technical solutions:
a double-rotor permanent magnet synchronous reluctance motor,
The magnetic resistance rotor comprises a rotating shaft, a magnetic resistance rotor, a stator and a permanent magnet rotor from inside to outside, wherein stator grooves are uniformly formed in the inside and the outside of the stator, and the stator is arranged between the permanent magnet rotor and the magnetic resistance rotor;
the d axis is defined as the center line of ferrite of the permanent magnet rotor, the q axis is defined as the center line of salient poles of the reluctance rotor, and the installation angles of the two rotors on the rotating shaft are defined as the included angle between the d axis and the q axis;
The mounting angle between the permanent magnet rotor and the reluctance rotor is adjusted to change the superposition mechanism of the torque components so that the permanent magnet torque and the reluctance torque reach their maximum values at the same current phase angle.
According to a further technical scheme, the stator comprises a stator core and stator windings, grooves are formed in the inner surface and the outer surface of the stator core, the space between each groove is the same as the width of each groove, and the stator windings are placed in the grooves and wound on a stator yoke.
According to a further technical scheme, the permanent magnet rotor comprises a permanent magnet rotor core and permanent magnets, wherein the permanent magnets are identical in specification and uniformly distributed along the circumferential direction, the permanent magnets are magnetized in the radial direction and are magnetized inwards or outwards, and the magnetizing directions of the adjacent permanent magnets are opposite.
According to a further technical scheme, the inner rotor is only composed of a reluctance rotor core and is provided with a plurality of salient pole structures, and each salient pole structure is identical and uniformly distributed along the circumferential direction.
Or the inner rotor consists of a reluctance rotor core and a U-shaped magnetism isolating bridge, adopts a multipolar structure, and has the same structure and is uniformly distributed along the circumferential direction;
Every pole structure is the same and sets up at equidistant interval in the direction of rotation, separates the magnetic bridge and extends along the pivot direction, and every pole adopts four-layer magnetic bridge structures that separates, and every layer separates the magnetic bridge and sets up from pivot to reluctance rotor edge layer by layer, separates the magnetic bridge from the pivot from inside to outside gradually to reduce, and the innermost magnetic bridge is biggest, wraps up outside magnetic bridge that separates.
According to a further technical scheme, an inner air gap is formed between the reluctance rotor and the inner wall of the stator; an external air gap is arranged between the permanent magnet rotor and the outer wall of the stator.
According to the technical scheme, the outer diameter of the permanent magnet is the same as the inner diameter of the outer rotor, the permanent magnets are attached together, the six permanent magnets are the same in size and distributed at equal intervals, and the surface-mounted permanent magnet rotor is formed.
According to a further technical scheme, the permanent magnet rotor and the reluctance rotor are jointly installed on a rotating shaft to output, and the stator iron core and the rotor iron core are formed by laminating silicon steel sheets along the direction of the rotating shaft.
According to a further technical scheme, the permanent magnet is made of low-cost ferrite.
The invention discloses a configuration method of a double-rotor permanent magnet synchronous reluctance motor, which comprises the following steps:
defining a d axis as a central line of ferrite of the permanent magnet rotor, defining a q axis as a central line of salient poles of the reluctance rotor, and defining an installation angle of the two rotors on the rotating shaft as an included angle between the d axis and the q axis;
The mounting angle between the permanent magnet rotor and the reluctance rotor is adjusted to change the superposition mechanism of the torque components so that the permanent magnet torque and the reluctance torque reach their maximum values at the same current phase angle.
The one or more of the above technical solutions have the following beneficial effects:
(1) The motor has the advantages of reliable structure, low cost, high efficiency and the like. Meanwhile, the motor realizes decoupling of the permanent magnet torque and the reluctance torque, so that the permanent magnet rotor and the reluctance rotor are relatively independent, the problems of multiple design parameters and high optimization difficulty of the traditional permanent magnet auxiliary synchronous reluctance motor are solved, and the design mode is more flexible.
(2) The permanent magnet rotor and the reluctance rotor of the motor are radially configured through a special combination angle, and a torque superposition mechanism can be changed, so that the maximum values of the permanent magnet torque and the reluctance torque can be superposed at the same current phase angle, two torque components of the motor are fully utilized, the electromagnetic torque is obviously improved, and the efficiency and other overall performances of the motor are greatly improved.
(3) The permanent magnet rotor adopts a surface-mounted permanent magnet rotor, has the advantages of simple structure, convenient processing technology, low manufacturing cost, less magnetic leakage and the like, and simultaneously has remarkable effects on reducing the cost and loss of the motor by adopting a ferrite design with high magnetic conductivity, low loss and high-temperature demagnetization resistance.
(4) The reluctance rotor has simple structure, higher mechanical strength and higher reluctance torque, can effectively reduce the dosage of the permanent magnet of the motor by matching with the use of the permanent magnet motor, and has remarkable effects in the aspects of saving the material cost of the motor, reducing the loss of the iron core and the magnet, and the like. Meanwhile, the reluctance rotor with the salient pole structure can effectively reduce torque pulsation and enhance mechanical strength, and has simple structure and easy processing and manufacturing; the reluctance rotor adopting the U-shaped magnetism isolating bridge has higher salient pole ratio, is beneficial to improving the reluctance torque of the motor, and further improves the total torque of the motor.
(5) The motor mainly comprises an outer rotor, an inner rotor and a stator, wherein the stator is positioned between the inner rotor and the outer rotor, the outer rotor is a surface-mounted permanent magnet rotor, the inner rotor is a reluctance rotor, and the two rotors are used for outputting by the same shaft. Through integrating multiple performance improvement technologies, especially through the design of the combined configuration angle of two rotors, the permanent magnet torque and the reluctance torque reach the maximum value at the same current phase angle, as shown in fig. 2, the two-part torque is fully utilized, the electromagnetic performance such as electromagnetic torque, power density, efficiency and torque pulsation suppression is comprehensively improved on the premise of not increasing the mechanical manufacturing and cooling difficulty of the motor, and the rotor has flexible structural design, simple processing technology and high mechanical strength.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a torque superposition relationship diagram of a conventional permanent magnet auxiliary synchronous reluctance motor;
FIG. 2 is a motor torque superposition relationship diagram of the present disclosure;
FIG. 3 is a schematic diagram of the structure of the motor of the present disclosure;
FIG. 4 is a one third block diagram of the motor of the present disclosure;
FIG. 5 is a schematic illustration of motor torque as a function of mounting angle;
FIG. 6 is a graph of motor torque versus current phase angle of the present disclosure;
In the figure: 1. a permanent magnet rotor; 2. a permanent magnet rotor core; 3. a permanent magnet; 4. a stator; 5. a stator core; 6. a stator winding; 7. a stator groove; 8. a reluctance rotor; 9. an outer air gap; 10. an inner air gap; 11. a reluctance rotor core; 12. a rotating shaft; 13. and a magnetic isolation bridge.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Embodiments of the invention and features of the embodiments may be combined with each other without conflict.
The invention provides a general idea:
The motor mainly comprises an outer rotor, an inner rotor and a stator, wherein the stator is arranged between the outer rotor and the inner rotor; the inner rotor and the outer rotor are radially configured through a combination angle, so that the maximum values of the permanent magnet torque and the reluctance torque can be overlapped at the same current phase angle, two torque components of the motor are fully utilized, and therefore the total torque, the efficiency and the power factor of the motor are improved.
Example 1
The embodiment discloses a double-rotor permanent magnet synchronous reluctance motor, which mainly comprises an outer rotor permanent magnet rotor 1, an inner rotor reluctance rotor 8 and a stator 4. Stator slots 7 are uniformly formed in the stator 4, and the stator 4 is arranged between the permanent magnet rotor 1 and the reluctance rotor 8.
The stator 4 comprises a stator core 5 and stator windings 6, the inner surface and the outer surface of the stator core 5 are provided with grooves, 36 stator grooves 7 are formed in total, the space between each groove is the same as the width of each groove, the stator windings 6 are placed in the grooves and wound on a stator yoke, and therefore the working surface area and the groove filling coefficient of the stator core are improved.
The outer rotor permanent magnet rotor 1 comprises a permanent magnet rotor core 2 and permanent magnets 3, wherein the permanent magnets 3 have the same specification and are uniformly distributed along the circumferential direction, and are tightly attached to the inner wall of the outer rotor core to form a surface-mounted permanent magnet rotor; the permanent magnets 3 are magnetized radially, inwards or outwards, and the magnetizing directions of adjacent permanent magnets are opposite.
The inner rotor is a reluctance rotor 8, and as an alternative embodiment, the inner rotor is composed of only a reluctance rotor core 11 with six salient pole structures, each of which is identical and uniformly distributed in the circumferential direction.
Or the inner rotor is composed of a reluctance rotor core 11 and a U-shaped magnetism isolating bridge 13, and a six-pole structure is adopted, and each pole structure is the same and is uniformly distributed along the circumferential direction.
In the specific implementation example, referring to fig. 3, the rotating shaft 12, the reluctance rotor 8, the stator 4 and the permanent magnet rotor 1 are sequentially arranged from inside to outside; an inner air gap 10 is arranged between the reluctance rotor 8 and the inner wall of the stator 4; an outer air gap 9 is arranged between the permanent magnet rotor 1 and the outer wall of the stator 4; the stator winding 6 is wound on the stator core 5; the reluctance rotor 8 and the permanent magnet rotor 1 are commonly mounted on the rotary shaft 12 for common output. The thickness of the inner and outer air gap is dependent on the power class of the motor, the selected permanent magnet material and the machining and assembly process of the reluctance rotor 8, the stator 4, and the permanent magnet rotor 1.
The invention has two rotors, the stator is in the middle of the two rotors, thus having two air gaps, a reluctance rotor and a permanent magnet rotor, which can take the advantages of synchronous reluctance motor and permanent magnet motor into account, and the power density of the traditional permanent magnet motor can be achieved by adopting low-cost ferrite.
Referring to fig. 3 and 4, the stator is composed of a stator core 5 and a stator winding 6, 36 stator slots are uniformly distributed inside and outside the stator core 5, each stator slot has the same width, and the stator winding is wound around the 36 inner and outer stator slots. In fig. 4, "+" is the incoming line direction of the stator winding 6, "-" is the outgoing line direction of the stator winding 6, A, B, C is the three-phase armature winding of the motor.
The permanent magnet rotor 1 disclosed by the disclosure is composed of an outer rotor iron core 2 and permanent magnets 3, wherein the permanent magnets are low-cost ferrite, the outer diameter of each permanent magnet 3 is the same as the inner diameter of the outer rotor 1, the permanent magnets are tightly attached together, the six permanent magnets are the same in size and distributed at equal intervals to form a surface-mounted permanent magnet rotor, the magnetizing directions of the permanent magnets 3 are radial magnetizing, and the magnetizing directions of the adjacent permanent magnets 3 are opposite.
As an alternative embodiment, referring to fig. 3, the reluctance rotor 8 of the present disclosure is formed of only a rotor core 11, and may be of a six-pole structure, or may be more poles, but each pole is required to be configured in the same manner as the following configuration: the six salient poles have the same structure and are distributed at equal intervals along the circumferential direction to form the reluctance rotor, the structure is simple and easy to process, the torque pulsation can be effectively reduced, the mechanical strength is enhanced, and the stable, efficient and reliable operation of the motor is ensured.
Alternatively, referring to fig. 3, the reluctance rotor 8 may have a U-shaped magnetic bridge structure, and may have a six-pole structure, or may have more poles, but each of the poles is required to be configured in the same manner as the following pole configuration: each pole has the same structure and is arranged at equal intervals in the rotation direction, and the magnetism isolating bridges 13 extend along the rotation axis direction. Each pole adopts a four-layer magnetism isolating bridge 13 structure, each layer of magnetism isolating bridge 13 is arranged layer by layer from the rotating shaft 12 to the edge of the reluctance rotor 8, the magnetism isolating bridges 13 gradually decrease from the inside to the outside of the rotating shaft 12, and the innermost magnetism isolating bridge is the largest and can wrap the outer magnetism isolating bridge. The U-shaped magnetism isolating bridge reluctance rotor has higher salient pole ratio, can generate higher reluctance torque, and further improves the total torque of the motor.
The permanent magnet rotor 1 and the reluctance rotor 8 are jointly installed on the rotating shaft 12 for output, and stator and rotor cores are formed by laminating silicon steel sheets along the rotating shaft direction, so that the processing is easy. The permanent magnet is made of low-cost ferrite permanent magnet material.
Example two
This embodiment discloses a configuration method of a dual-rotor permanent magnet synchronous reluctance motor, the disclosed structure maintains circumferential symmetry, the d-axis is defined as the center line of ferrite of the permanent magnet rotor, the q-axis is defined as the center line of salient poles of the reluctance rotor, as shown in fig. 4, and the installation angle θ of two rotors on the rotating shaft 12 is defined as the included angle between the d-axis and the q-axis.
The present disclosure changes the superposition mechanism of the torque components by designing the installation angle θ between the permanent magnet rotor 1 and the reluctance rotor 8 so that the permanent magnet torque and the reluctance torque reach their maximum values at almost the same current phase angle, improving the total torque, and further improving the motor performance.
The angle between the d-axis and the q-axis is defined as the mounting angle of the two rotors, and the torque superposition relationship is changed by changing this mounting angle, so that the permanent magnet torque and the reluctance torque reach the maximum value at the same current phase angle, as shown in fig. 2.
Theoretically, two torques reach the maximum value at the same current phase angle, but the current phase angle at which the two torques reach the maximum value is within 5 degrees due to the influence of magnetic leakage and local saturation, the relation between the torque and the current phase angle is shown in fig. 6, and the relation between the torque and the installation angle is shown in fig. 5.
Fig. 5 is a graph of torque versus mounting angle, curve 1 is total torque, curve 2 is reluctance torque, and curve 3 is permanent magnet torque. As can be seen, the torque can be most fully utilized when the mounting angle is about 15 °.
Fig. 6 is a graph showing the change of torque with the current phase angle after the installation angle is determined, curve 4 is the total torque, curve 5 is the reluctance torque, and curve 6 is the permanent magnet torque. From the graph, the permanent magnet torque and the reluctance torque reach the maximum value almost at the same current phase angle, so that the electromagnetic torque of the motor is obviously improved.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (2)
1. The double-rotor permanent magnet synchronous reluctance motor is characterized by comprising a rotating shaft, reluctance rotors, a stator and a permanent magnet rotor from inside to outside, wherein stator grooves are uniformly formed inside and outside the stator, and the stator is arranged between the permanent magnet rotor and the reluctance rotors;
The stator comprises a stator core and stator windings, grooves are formed in the inner surface and the outer surface of the stator core, the space between each groove is the same as the width of each groove, and the stator windings are arranged in the grooves and wound on a stator yoke;
The permanent magnet rotor comprises a permanent magnet rotor core and permanent magnets, wherein the permanent magnets are identical in specification and uniformly distributed along the circumferential direction, the permanent magnets are magnetized in the radial direction and are magnetized inwards or outwards, and the magnetizing directions of adjacent permanent magnets are opposite; the outer diameter of the permanent magnet is the same as the inner diameter of the outer rotor, the six permanent magnets are bonded together, the six permanent magnets are the same in size and distributed at equal intervals, and a surface-mounted permanent magnet rotor is formed; the permanent magnet adopts low-cost ferrite;
The reluctance rotor is composed of a reluctance rotor core only and is provided with a plurality of salient pole structures, and each salient pole structure is identical and uniformly distributed along the circumferential direction; the permanent magnet rotor and the reluctance rotor are jointly arranged on the rotating shaft to output stator and rotor cores, and the stator and rotor cores are formed by laminating silicon steel sheets along the direction of the rotating shaft;
An inner air gap is arranged between the reluctance rotor and the inner wall of the stator; an external air gap is arranged between the permanent magnet rotor and the outer wall of the stator;
the d axis is defined as the center line of ferrite of the permanent magnet rotor, the q axis is defined as the center line of salient poles of the reluctance rotor, and the installation angles of the two rotors on the rotating shaft are defined as the included angle between the d axis and the q axis;
Adjusting the installation angle between the permanent magnet rotor and the reluctance rotor to change the superposition mechanism of the torque components so that the permanent magnet torque and the reluctance torque reach the maximum value at the same current phase angle;
The torque utilization is most sufficient when the mounting angle is 15 degrees.
2. The double-rotor permanent magnet synchronous reluctance motor of claim 1 wherein the reluctance rotor consists of a reluctance rotor core and a U-shaped magnetism isolating bridge, and adopts a multipolar structure, and each pole structure is the same and uniformly distributed along the circumferential direction;
Every pole structure is the same and sets up at equidistant interval in the direction of rotation, separates the magnetic bridge and extends along the pivot direction, and every pole adopts four-layer magnetic bridge structures that separates, and every layer separates the magnetic bridge and sets up from pivot to reluctance rotor edge layer by layer, separates the magnetic bridge from the pivot from inside to outside gradually to reduce, and the innermost magnetic bridge is biggest, wraps up outside magnetic bridge that separates.
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| CN111162614A (en) * | 2020-01-10 | 2020-05-15 | 南京航空航天大学 | Stator modularized hybrid dual-rotor motor |
| CN111082622A (en) * | 2020-01-10 | 2020-04-28 | 南京航空航天大学 | Decoupling type birotor alternating pole permanent magnet motor |
| US11923733B2 (en) * | 2020-08-28 | 2024-03-05 | Quantentech Limited | High efficiency high density motor and generator with multiple airgaps |
| CN113162260A (en) * | 2021-04-08 | 2021-07-23 | 珠海格力电器股份有限公司 | Stator assembly, winding method thereof and double-rotor motor |
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| CN210350986U (en) * | 2019-10-25 | 2020-04-17 | 山东大学 | Birotor permanent magnet synchronous reluctance motor |
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| JP4269544B2 (en) * | 2000-09-14 | 2009-05-27 | 株式会社デンソー | Multi-rotor synchronous machine |
| KR20060022376A (en) * | 2004-09-07 | 2006-03-10 | 엘지이노텍 주식회사 | Dual rotor motor |
| CN103929026B (en) * | 2013-01-16 | 2016-01-20 | 珠海格力节能环保制冷技术研究中心有限公司 | Magneto |
| CN104617725A (en) * | 2015-01-16 | 2015-05-13 | 华中科技大学 | Asynchronous starting type permanent magnetic synchronizing motor of double-rotor structure |
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| CN210350986U (en) * | 2019-10-25 | 2020-04-17 | 山东大学 | Birotor permanent magnet synchronous reluctance motor |
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