CN218733792U - Birotor synchronous reluctance motor - Google Patents
Birotor synchronous reluctance motor Download PDFInfo
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- CN218733792U CN218733792U CN202222417483.8U CN202222417483U CN218733792U CN 218733792 U CN218733792 U CN 218733792U CN 202222417483 U CN202222417483 U CN 202222417483U CN 218733792 U CN218733792 U CN 218733792U
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 24
- 238000004804 winding Methods 0.000 claims abstract description 51
- 230000004888 barrier function Effects 0.000 claims abstract description 22
- 230000005284 excitation Effects 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 8
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 230000004907 flux Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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Abstract
The utility model discloses a birotor synchronous reluctance motor, including the external rotor, the inner rotor, the stator, outer winding, inner winding and supplementary excitation assembly, the stator is located between external rotor and the inner rotor, between stator and the external rotor, all leave the air gap between stator and the inner rotor, supplementary excitation assembly inlays on the stator, the external rotor has i outer rotor teeth, the inner rotor has j inner rotor teeth, the stator includes stator yoke portion, be located n stator inner teeth of stator yoke portion inboard and be located n stator outer teeth of stator yoke portion outside, outer winding coiling is on the stator outer teeth, the inner winding coiling is on the stator inner teeth; the stator yoke is provided with n fan-shaped air magnetic barriers which are uniformly distributed along the circumferential direction of the stator yoke at intervals and enclose a circle. The utility model discloses can improve the magnetic circuit, make the magnetic field magnetic line of force that produces after interior winding, the circular telegram of outer winding mutually noninterfere, guarantee the stability of the torque of motor output.
Description
Technical Field
The utility model belongs to the motor field, concretely relates to synchronous reluctance motor of birotor.
Background
It is a major trend to fully utilize the reluctance torque generated by the rotor crown, and this technique is well applied to synchronous reluctance motors. The synchronous reluctance motor is an alternating current motor which utilizes the different magnetic resistances of a rotor at different positions to generate magnetic pull force to drive the motor to rotate according to the principle of minimum path closing of the magnetic resistance. The rotor of the synchronous reluctance motor does not need a winding coil, and the synchronous reluctance motor has the advantages of simple structure, high reliability, low cost and good application prospect in the industrial field.
The double-rotor synchronous reluctance motor is applied to a plurality of industrial fields at present, has double-shaft output capacity of providing two independent rotating speeds and independent torque, and has more advantages compared with the traditional motor structure. Reluctance machines themselves have low power factors, relatively low torque densities, and relatively low efficiencies. In order to improve the situation, CN108448849A discloses a stator permanent magnet type dual-rotor magnetic field modulation motor and a design method thereof, which can improve the performance of the motor by adding permanent magnets to the yoke of the stator to assist excitation, but magnetic field lines generated after the inner winding is energized interfere with magnetic field lines generated after the outer winding is energized, thereby affecting the stability of the torque output by the motor.
Disclosure of Invention
The utility model aims at providing a synchronous reluctance motor of birotor to improve the magnetic circuit, make the magnetic field magnetic line of force that produces after interior winding, the circular telegram of outer winding mutually noninterfere, guarantee the stability of the torque of motor output.
The utility model discloses a synchronous reluctance motor of birotor, including the external rotor, the inner rotor, the stator, outer winding, inner winding and supplementary excitation subassembly, the stator is located between external rotor and the inner rotor, between stator and the external rotor, all leave the air gap between stator and the inner rotor, supplementary excitation subassembly inlays on the stator, the external rotor has i outer rotor teeth, the inner rotor has j inner rotor teeth, the stator includes stator yoke portion, be located n stator internal teeth of stator yoke portion inboard and be located n stator external teeth of stator yoke portion outside (the position of n stator internal teeth and the position one-to-one of n stator external teeth), outer winding coiling is on the stator external teeth, inner winding coiling is on the stator internal teeth; the stator yoke is provided with n fan-shaped air magnetic barriers, and the n fan-shaped air magnetic barriers are uniformly distributed at intervals along the circumferential direction of the stator yoke and enclose a circle; wherein n is a multiple of 3.
Preferably, the space between two adjacent air magnetic barriers is opposite to one stator inner tooth in the radial direction, and the magnetic isolation effect is better.
Preferably, the radial width of the air barriers is 1/3 of the radial width of the stator yoke, and the center angle subtended by the interval between two adjacent air barriers is greater than 0.1 x 360 °/n and less than the center angle subtended by the internal teeth of one stator. The n air magnetic barriers with the size are arranged on the yoke part of the stator, so that the area maximization of the air magnetic barriers is ensured on the basis of meeting the requirement of the mechanical strength of the stator, and a better magnetic isolation effect can be achieved.
Preferably, i =22, j =10, and n =12, that is, 22 outer rotor teeth, 10 inner rotor teeth, and 12 inner stator teeth and outer stator teeth are provided. The number of the outer rotor teeth, the number of the inner rotor teeth, the number of the stator inner teeth and the number of the stator outer teeth are in an optimal combination form obtained by performing multi-objective optimization research on the electromagnetic properties of the motor, such as magnetic field distribution, flux linkage, back electromotive force and the like.
Preferably, the outer winding and the inner winding both adopt centralized double-layer windings. The adoption of the centralized double-layer winding can reduce the height of the end winding and reduce the copper consumption and the copper consumption.
Preferably, the auxiliary excitation assembly comprises n first permanent magnets and 2n second permanent magnets, the n first permanent magnets are respectively embedded in the n stator external teeth (namely one first permanent magnet is embedded in one stator external tooth), the 2n second permanent magnets are respectively embedded in the n stator internal teeth, and two second permanent magnets are embedded in each stator internal tooth at intervals along the radial direction. The first permanent magnet is embedded on the outer teeth of the stator, the two second permanent magnets are embedded on the inner teeth of the stator at intervals, the first permanent magnet and the second permanent magnets are excited in an auxiliary mode, the motor is enabled to generate enough magnetic field intensity, meanwhile, permanent magnet materials are saved, and cost is saved.
Preferably, the first permanent magnet is rectangular, the second permanent magnet is rectangular, the first permanent magnet which is rectangular is more convenient to operate when embedded on the outer teeth of the stator, and the second permanent magnet which is rectangular is more convenient to operate when embedded on the inner teeth of the stator.
Preferably, the length of the first permanent magnet is 2/3 of the tooth thickness of the outer teeth of the stator, and the width of the first permanent magnet is 1/3 of the tooth height of the outer teeth of the stator. The first permanent magnet of such a size can achieve better auxiliary excitation.
Preferably, the two second permanent magnets on the same internal tooth of the stator are spaced at a distance of 1/3 of the height of the internal tooth of the stator in the radial direction. Two second permanent magnets are embedded at intervals, so that the auxiliary excitation effect is better.
Preferably, the length of the second permanent magnet is 2/3 of the tooth thickness of the internal teeth of the stator, and the width of the second permanent magnet is 1/6 of the tooth height of the internal teeth of the stator. The second permanent magnet with the size can better realize auxiliary excitation.
The utility model discloses a set up a plurality of fan-shaped through-holes's of edge circumference evenly distributed mode on stator yoke portion, form a plurality of fan-shaped air magnetic barriers of n, a plurality of fan-shaped air magnetic barriers of n enclose into the round, it utilizes the higher magnetic resistivity of air itself to increase the magnetic resistance, keep apart the inner winding, the magnetic line of force that outer winding produced, the magnetic circuit has been improved, make the inner winding, the magnetic field magnetic line of force mutually noninterfere that produces after the outer winding circular telegram, the stability of the torque of motor output has been guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a dual-rotor synchronous reluctance motor in this embodiment.
Fig. 2 is a schematic diagram of a part of magnetic force lines of the dual-rotor synchronous reluctance motor in this embodiment.
Detailed Description
As shown in fig. 1, the dual-rotor synchronous reluctance motor in the present embodiment includes an outer rotor 1, an inner rotor 2, a stator, an outer winding 4, an inner winding 5, and an auxiliary excitation assembly.
The stator is located between outer rotor 1 and inner rotor 2, leaves the air gap between stator and the outer rotor 1, leaves the air gap between stator and the inner rotor 2. The outer rotor 1 has 22 outer rotor teeth 11, the inner rotor 2 has 10 inner rotor teeth 21, and the outer rotor 1 and the inner rotor 2 both adopt a salient pole structure.
The stator comprises a stator yoke portion 31, 12 stator internal teeth 32 and 12 stator external teeth 33, wherein the 12 stator internal teeth 32 are located on the inner side of the stator yoke portion 31, the 12 stator external teeth 33 are located on the outer side of the stator yoke portion 31, and the positions of the 12 stator internal teeth 32 correspond to the positions of the 12 stator external teeth 33 one by one. The stator internal teeth 32 and the stator external teeth 33 are both straight teeth structures.
The stator yoke 31 is provided with 12 fan-shaped air magnetic barriers 34 (formed by forming 12 fan-shaped through holes uniformly distributed along the circumferential direction), and the 12 fan-shaped air magnetic barriers 34 are uniformly distributed along the circumferential direction of the stator yoke 31 at intervals and are enclosed into a circle. The spacing between two adjacent fan-shaped air magnetic barriers 34 is diametrically opposite to the stator internal teeth 32. The radial width of the fan-shaped air magnetic barriers 34 is 1/3 of the radial width of the stator yoke part 31, and the central angle subtended by the interval between two adjacent fan-shaped air magnetic barriers 34 is larger than 3 degrees and smaller than the central angle subtended by one stator internal tooth 32.
The auxiliary excitation assembly comprises 12 first permanent magnets 6 and 24 second permanent magnets 7. The first permanent magnet 6 is rectangular, and the second permanent magnet 7 is rectangular; the first permanent magnet 6 is made of rare earth materials and is magnetized in the radial direction alternately; the second permanent magnet 7 is made of rare earth materials and is magnetized in the radial direction alternately. The 12 first permanent magnets 6 are respectively embedded on the 12 stator outer teeth 33, one first permanent magnet 6 is embedded on one stator outer tooth 33, the length of the first permanent magnet 6 is 2/3 of the tooth thickness of the stator outer tooth 33, and the width of the first permanent magnet 6 is 1/3 of the tooth height of the stator outer tooth 33. The 24 second permanent magnets 7 are respectively embedded on the 12 stator internal teeth 32, two second permanent magnets 7 are embedded on each stator internal tooth 32 at intervals along the radial direction, the distance between every two second permanent magnets 7 in the radial direction is 1/3 of the tooth height of the stator internal teeth 32, the length of each second permanent magnet 7 is 2/3 of the tooth thickness of the stator internal teeth 32, and the width of each second permanent magnet 7 is 1/6 of the tooth height of the stator internal teeth 32.
The outer winding 4 adopts a centralized double-layer winding and is wound on the outer teeth 33 of the stator. The windings wound on the first, fourth, seventh and tenth stator outer teeth 33 in the clockwise direction are connected to form an A-phase armature winding on the outer side; the windings wound on the second, fifth, eighth and eleventh stator external teeth 33 along the clockwise direction are connected to form an outer B-phase armature winding; and the windings wound on the third, sixth, ninth and twelfth stator external teeth 33 in the clockwise direction are connected to form an outer C-phase armature winding.
The inner winding 5 adopts a centralized double-layer winding and is wound on the inner teeth 32 of the stator. The windings wound on the first, fourth, seventh and tenth stator inner teeth 32 along the clockwise direction are connected to form an A-phase armature winding on the inner side; the windings wound on the inner teeth 32 of the second, fifth, eighth and eleventh stators along the clockwise direction are connected to form a B-phase armature winding on the inner side; and the windings wound on the third, sixth, ninth and twelfth stator inner teeth 32 along the clockwise direction are connected to form an inner C-phase armature winding.
An air gap is formed between the outer rotor 1 and the stator, the outer rotor 1, the outer teeth 33 of the stator, the outer winding 4, a part of the stator yoke part positioned outside the air magnetic barrier 34 and the first permanent magnet 6 form a reluctance motor, and part of magnetic lines of force of the reluctance motor are shown in figure 2. An air gap is formed between the inner rotor 2 and the stator, the inner rotor 2, the inner teeth 32 of the stator, the inner winding 5, a part of the stator yoke part positioned on the inner side of the air magnetic barrier 34 and the second permanent magnet 7 form another reluctance motor, and part of magnetic lines of force of the reluctance motor run as shown in fig. 2.
Claims (10)
1. A dual-rotor synchronous reluctance motor comprises an outer rotor (1), an inner rotor (2), a stator, an outer winding (4), an inner winding (5) and an auxiliary excitation assembly, wherein the stator is positioned between the outer rotor (1) and the inner rotor (2), an air gap is reserved between the stator and the outer rotor (1) and between the stator and the inner rotor (2), the auxiliary excitation assembly is embedded on the stator, the outer rotor (1) is provided with i outer rotor teeth (11), the inner rotor (2) is provided with j inner rotor teeth (21), the stator comprises a stator yoke portion (31), n stator inner teeth (32) positioned on the inner side of the stator yoke portion and n stator outer teeth (33) positioned on the outer side of the stator yoke portion, the outer winding (4) is wound on the stator outer teeth (33), and the inner winding (5) is wound on the stator inner teeth (32); the method is characterized in that: n fan-shaped air magnetic barriers (34) are arranged on the stator yoke portion (31), and the n fan-shaped air magnetic barriers (34) are uniformly distributed at intervals along the circumferential direction of the stator yoke portion and enclose a circle; wherein n is a multiple of 3.
2. The dual rotor synchronous reluctance machine of claim 1, wherein: the interval between two adjacent air magnetic barriers (34) is opposite to one stator internal tooth (32) in the radial direction.
3. The dual rotor synchronous reluctance machine of claim 2, wherein: the radial width of the air magnetic barriers (34) is 1/3 of the radial width of the stator yoke portion (31), and the central angle subtended by the interval between every two adjacent air magnetic barriers (34) is larger than 0.1 x 360 DEG/n and smaller than the central angle subtended by the internal teeth (32) of one stator.
4. The dual rotor synchronous reluctance machine of claim 2, wherein: the i =22, the j =10, and the n =12.
5. The dual rotor synchronous reluctance machine of claim 2, wherein: the outer winding (4) and the inner winding (5) both adopt centralized double-layer windings.
6. The dual-rotor synchronous reluctance machine of any one of claims 1 to 5, wherein: the auxiliary excitation assembly comprises n first permanent magnets (6) and 2n second permanent magnets (7), the n first permanent magnets (6) are respectively embedded on n stator external teeth (33), the 2n second permanent magnets (7) are respectively embedded on n stator internal teeth (32), and each stator internal tooth (32) is radially embedded with two second permanent magnets (7) at intervals.
7. The dual rotor synchronous reluctance machine of claim 6, wherein: the first permanent magnet (6) is rectangular, and the second permanent magnet (7) is rectangular.
8. The dual rotor synchronous reluctance machine of claim 7, wherein: the length of the first permanent magnet (6) is 2/3 of the tooth thickness of the stator external teeth (33), and the width of the first permanent magnet is 1/3 of the tooth height of the stator external teeth (33).
9. The dual rotor synchronous reluctance machine of claim 7, wherein: the radial distance between the two second permanent magnets (7) on the same stator internal tooth is 1/3 of the tooth height of the stator internal tooth (32).
10. The dual rotor synchronous reluctance machine of claim 7, wherein: the length of the second permanent magnet (7) is 2/3 of the tooth thickness of the stator internal teeth (32), and the width of the second permanent magnet is 1/6 of the tooth height of the stator internal teeth (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222417483.8U CN218733792U (en) | 2022-09-13 | 2022-09-13 | Birotor synchronous reluctance motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222417483.8U CN218733792U (en) | 2022-09-13 | 2022-09-13 | Birotor synchronous reluctance motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218733792U true CN218733792U (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222417483.8U Active CN218733792U (en) | 2022-09-13 | 2022-09-13 | Birotor synchronous reluctance motor |
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| Country | Link |
|---|---|
| CN (1) | CN218733792U (en) |
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2022
- 2022-09-13 CN CN202222417483.8U patent/CN218733792U/en active Active
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Address after: 211200 floor 5, block a, Kechuang building, Huizhi Industrial Park, Lishui District, Nanjing, Jiangsu Province Patentee after: Shenzhen Blue Automobile Nanjing Research Institute Co.,Ltd. Country or region after: China Address before: 211200 floor 5, block a, Kechuang building, Huizhi Industrial Park, Lishui District, Nanjing, Jiangsu Province Patentee before: Chang'an new energy Nanjing Research Institute Co.,Ltd. Country or region before: China |