CN116780799A - Rotor structure of rare earth-less permanent magnet auxiliary synchronous reluctance motor - Google Patents
Rotor structure of rare earth-less permanent magnet auxiliary synchronous reluctance motor Download PDFInfo
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- CN116780799A CN116780799A CN202310682404.2A CN202310682404A CN116780799A CN 116780799 A CN116780799 A CN 116780799A CN 202310682404 A CN202310682404 A CN 202310682404A CN 116780799 A CN116780799 A CN 116780799A
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 22
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 17
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 17
- 230000004888 barrier function Effects 0.000 claims abstract description 16
- 238000002955 isolation Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 19
- 229910000859 α-Fe Inorganic materials 0.000 claims description 9
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 5
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 4
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 230000004907 flux Effects 0.000 abstract description 15
- 230000005389 magnetism Effects 0.000 abstract description 7
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 230000002829 reductive effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Synchronous Machinery (AREA)
Abstract
The invention discloses a rotor structure of a rare earth-less permanent magnet auxiliary synchronous reluctance motor, which comprises a rotor core, a main permanent magnet, an auxiliary permanent magnet, a rotating shaft and a magnetic barrier; the rotor core is uniformly provided with a plurality of rotor main groove units along the circumference, each rotor main groove unit comprises four layers of arc main grooves and two straight side wing grooves at two sides of the innermost layer of arc main grooves, arc auxiliary grooves are extended at two sides of the arc main grooves along the arc direction of the arc main grooves, each layer of arc main grooves and the same layer of arc auxiliary grooves are concentric, have the same radius and have the same width, and air grooves are arranged between adjacent rotor main groove units; the arc main groove and the arc auxiliary groove are respectively provided with a main permanent magnet and an auxiliary permanent magnet; magnetic barriers are uniformly distributed in the arc-shaped main grooves at the two sides of the main permanent magnet, the straight side wing groove and the arc-shaped auxiliary groove at the outer side of the auxiliary permanent magnet. The invention can reduce short-circuit leakage flux of the main permanent magnet at the magnetism isolating bridge, improve the mechanical strength of the rotor, effectively inhibit the leakage flux of the main permanent magnet and the reduction of the electromagnetic performance of the motor, and improve the utilization rate of the rare earth permanent magnet.
Description
Technical Field
The invention relates to a motor design technology, in particular to a rotor structure of a rare earth-less permanent magnet auxiliary synchronous reluctance motor.
Background
The permanent magnet auxiliary synchronous reluctance motor integrates the characteristics of the synchronous reluctance motor and the permanent magnet motor, and can fully utilize reluctance torque and permanent magnet torque to improve the output torque of the motor, so that the motor has high torque density, high efficiency and low cost and has wide application prospect.
In a permanent magnet-assisted synchronous reluctance motor, the thickness of the magnetically isolated bridge directly affects the leakage of the permanent magnet and the mechanical strength of the rotor. When the magnetic isolation bridge is designed to be thinner, the magnetic leakage of the permanent magnet is reduced, the utilization rate of the permanent magnet is improved, but the mechanical strength of the motor rotor is correspondingly reduced, and the safety coefficient and the service life of the motor rotor are reduced. When the magnetic isolation bridge structure is designed to be thicker, although the mechanical strength of the rotor is increased, the magnetic leakage of the motor is increased, and the electromagnetic performance is correspondingly reduced. Therefore, how to reduce the influence on electromagnetic performance while improving the mechanical strength of a motor rotor is one of the research hotspots of the motor.
Disclosure of Invention
The invention aims to: the invention aims to provide a rotor structure of a rare earth permanent magnet auxiliary synchronous reluctance motor, which can effectively inhibit the magnetic leakage of a rare earth permanent magnet and improve the utilization rate of rare earth permanent magnet materials and the mechanical strength of the rotor on the premise of not increasing the cost of the motor rotor.
The technical scheme is as follows: the invention relates to a rotor structure of a rare earth-less permanent magnet auxiliary synchronous reluctance motor, which comprises a rotor core, a main permanent magnet, auxiliary permanent magnets, a rotating shaft and a magnetic barrier, wherein the rotor core rotates around the rotating shaft; the rotor core is uniformly provided with a plurality of rotor main groove units along the circumference, each rotor main groove unit comprises N layers of arc main grooves and two straight side wing grooves at two sides of the innermost arc main groove, N layers of arc auxiliary grooves are extended at two sides of the N layers of arc main grooves along the arc direction of the N layers of arc main grooves, each layer of arc main grooves and the same layer of arc auxiliary grooves are concentric, have the same radius and have the same width, and an air groove is also arranged in the rotor core between the adjacent rotor main groove units; a main permanent magnet and an auxiliary permanent magnet are respectively arranged in the arc-shaped main groove and the arc-shaped auxiliary groove; magnetic barriers are uniformly distributed in the arc-shaped main grooves at the two sides of the main permanent magnet, the straight side wing groove and the arc-shaped auxiliary groove at the outer side of the auxiliary permanent magnet.
Preferably, all layers of the N layers of the arc-shaped main grooves are concentric, have the same width and are equally spaced.
Preferably, the arc openings of the N layers of arc main grooves and the N layers of arc auxiliary grooves face the outer side of the rotor, the innermost arc main grooves and the two straight flank grooves on the two sides of the innermost arc main grooves form a U-shaped groove structure with the openings facing the inner side of the rotor, and two adjacent straight flank grooves of the two adjacent U-shaped grooves on the circumference of the rotor are on the same straight line and are separated by the rotor core.
Preferably, adjacent side lines of the arc auxiliary groove and the arc main groove are linear and parallel, and the side line of the arc auxiliary groove close to the outer diameter of the rotor core is arc.
Preferably, an inner magnetic isolation bridge is arranged between the arc-shaped main groove and the arc-shaped auxiliary groove, the thickness of the magnetic isolation bridge between each layer of arc-shaped main groove and the thickness of the magnetic isolation bridge between each layer of arc-shaped auxiliary groove are equal, and an outer magnetic isolation bridge is arranged between the outer side of the arc-shaped auxiliary groove and the outer diameter of the rotor core.
Preferably, the inner magnetic isolation bridge and the outer magnetic isolation bridge are made of high-permeability silicon steel sheet materials.
Preferably, main permanent magnets in the main groove units of each rotor adopt a radial alternating magnetizing mode, and when N layers of main permanent magnets in a certain main groove unit of the rotor are magnetized radially outwards, auxiliary permanent magnets in arc auxiliary grooves at two sides of the main permanent magnets are magnetized outwards along the width direction of the main permanent magnets; on the contrary, when the main permanent magnet is magnetized inwards in the radial direction, the auxiliary permanent magnets in the arc auxiliary grooves on the two sides of the main permanent magnet are magnetized inwards along the width direction of the main permanent magnet.
Preferably, the main permanent magnet is made of rare earth neodymium iron boron material, and the auxiliary permanent magnet is made of ferrite material.
Preferably, the magnetic barrier is made of an epoxy resin matrix composite material.
Preferably, the rotor core is made of high-permeability silicon steel sheet material.
The beneficial effects are that: compared with the prior art, the invention has the remarkable technical effects that:
1. according to the rotor structure of the rare earth permanent magnet auxiliary synchronous reluctance motor, the original magnetic leakage magnetic circuit of the rare earth permanent magnet in the rotor is converted into the serial magnetic circuit of the rare earth permanent magnet and the ferrite by utilizing the magnetic conduction and magnetic barrier of the ferrite of the auxiliary slot and the magnetism isolating effect of the air slot, so that the ferrite in the auxiliary slot and the rare earth permanent magnet in the arc-shaped main slot form serial-parallel magnetic circuits under the magnetic poles of the rotor, and the serial-parallel magnetic circuits are used as main magnetic flux to flow through an air gap to participate in electromechanical energy coupling of the motor, and the electromagnetic performance of the motor and the utilization rate of rare earth permanent magnet materials are improved.
2. Compared with rare earth neodymium iron boron materials, the ferrite materials are low in price, the direct side wing magnetic barriers and the air grooves have the magnetism isolating effect, and the iron core consumption is reduced to a certain extent, so that the rare earth-less structure provided by the invention can meet the requirements of the permanent magnet auxiliary reluctance motor on the mechanical strength and the electromagnetic performance of the rotor under the condition of not increasing the cost.
3. By arranging the rotor core air slots between the adjacent rotor main slot units, the quadrature axis inductance of the motor can be reduced, and the salient pole ratio of the motor can be increased.
Drawings
FIG. 1 is a radial cross-sectional view of a rotor structure according to the present invention;
FIG. 2 is a radial cross-sectional view of a rotor core structure in accordance with the present invention;
FIG. 3 is a schematic diagram of a magnetizing method of a permanent magnet according to the present invention;
fig. 4 is a schematic diagram of magnetic force line distribution and magnetic circuit of a permanent magnet in a conventional permanent magnet auxiliary reluctance motor, wherein (a) is a schematic diagram of magnetic force line distribution and (b) is a schematic diagram of magnetic circuit;
fig. 5 is a schematic diagram of magnetic force line distribution and magnetic circuit of a permanent magnet according to the present invention, wherein (a) is a schematic diagram of magnetic force line distribution and (b) is a schematic diagram of magnetic circuit;
fig. 6 is a waveform diagram of no-load back emf of a motor structure employing the rotor structure of the present invention;
in the figure: the rotor comprises a rotor core 1, a main permanent magnet 2, an auxiliary permanent magnet 3, a rotating shaft 4, a magnetic barrier 5, a rotor main groove unit 6, an arc-shaped main groove 6-1, a straight flank groove 6-2, an arc-shaped auxiliary groove 7, an inner magnetic isolation bridge 8, an outer magnetic isolation bridge 9 and an air groove 10.
Detailed Description
The invention is further illustrated by the following figures and specific examples, which are intended to be illustrative only and not limiting in any way, and are not intended to limit the scope of the invention.
The invention aims to provide a rotor structure of a rare earth-less permanent magnet auxiliary synchronous reluctance motor, wherein a plurality of outwards-opened four layers of arc-shaped main groove units are uniformly arranged on a rotor core along the circumference, two straight flank grooves are inwards arranged on two sides of an innermost layer of arc-shaped main groove along the side line direction of the innermost layer of arc-shaped main groove, and a U-shaped groove structure with inwards-opened openings is formed; the four layers of arc-shaped main grooves are fixedly embedded with main permanent magnets which are magnetized in radial alternation, four layers of auxiliary grooves are extended on two sides of the four layers of arc-shaped main grooves along the arc direction of the four layers of arc-shaped main grooves, and magnetic isolation bridges are arranged between the arc-shaped main grooves and the same layer of arc-shaped auxiliary grooves; an auxiliary permanent magnet is fixedly embedded in the auxiliary groove, and the magnetizing direction of the auxiliary permanent magnet is along the width direction of the auxiliary permanent magnet to magnetize outwards or inwards along with the main permanent magnet at the adjacent side; the main permanent magnet is made of rare earth permanent magnet materials, the auxiliary permanent magnet is made of ferrite, magnetic barriers are arranged on two sides of the main permanent magnet, in the straight side wing grooves and in the auxiliary grooves on the outer sides of the auxiliary permanent magnet, and air grooves are formed in the rotor core between the adjacent rotor groove units. According to the motor rotor structure, due to the existence of the magnetic barriers and the air grooves on the two sides of the main permanent magnet, the main permanent magnet and the auxiliary permanent magnet form a series-parallel magnetic circuit at the rotor magnetic pole, so that short-circuit leakage magnetic flux of the main permanent magnet at a magnetic isolation bridge is reduced, the magnetic leakage of the main permanent magnet can be effectively restrained, the mechanical strength of the rotor is improved through the magnetic isolation bridge, meanwhile, the magnetic leakage of the main permanent magnet and the reduction of the electromagnetic performance of the motor can be effectively restrained, and the utilization rate of the rare earth permanent magnet is improved.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 and 2, the rotor structure of the rare earth-less permanent magnet auxiliary synchronous reluctance motor provided in this embodiment includes a rotor core 1, a main permanent magnet 2, an auxiliary permanent magnet 3, a rotating shaft 4 and a magnetic barrier 5. The rotor core 1 rotates around the rotating shaft 4; 4 rotor main groove units 6 are uniformly arranged on the rotor core 1 along the circumference, and each rotor main groove unit 6 consists of a U-shaped groove with a first layer of openings facing inwards and an arc-shaped main groove with a second layer of openings facing outwards, a third layer of openings and a fourth layer of openings facing outwards from inside to outside. The U-shaped groove comprises a bottom edge arc groove and straight side wing grooves 6-2 on two sides communicated with the bottom edge arc groove, the bottom edge arc groove of the U-shaped groove is concentric with the arc-shaped main grooves with the second layer opening, the third layer opening and the fourth layer opening outwards, the same width and the same interval are parallel to the side edges, and the bottom edge arc groove of the U-shaped groove and the arc-shaped main grooves with the second layer opening, the third layer opening and the fourth layer opening outwards form a four-layer arc-shaped main groove structure 6-1. Adjacent straight flank slots 6-2 of adjacent two U-shaped slots on the circumference of the rotor core are aligned and separated by the rotor core 1. Four layers of concentric, equally wide and equally spaced arc auxiliary grooves 7 are formed in two sides of the four layers of arc-shaped main grooves 6-1 of each rotor main groove unit 6 along the arc direction of the rotor main groove unit, the arc-shaped main grooves 6-1 and the concentric layers of arc-shaped auxiliary grooves 7 are concentric, have the same radius and the same width, and adjacent side lines of the arc-shaped auxiliary grooves 7 and the arc-shaped main grooves 6-1 are linear and are parallel to each other. The edge line of the arc-shaped auxiliary groove 7, which is close to the outer diameter of the rotor, is arc-shaped.
An inner magnetic isolation bridge 8 is arranged between the arc-shaped main groove 6-1 and the arc-shaped auxiliary groove 7, and the thickness of the inner magnetic isolation bridge 8 between each layer of arc-shaped main groove 6-1 and the arc-shaped auxiliary groove 7 is equal. An outer magnetism isolating bridge 9 is arranged between the outer side of the arc-shaped auxiliary groove 7 and the outer diameter of the rotor core 1. Air slots 10 are also provided in the rotor core 1 between adjacent rotor main slot units 6.
As shown in fig. 3, 4 layers of arc main permanent magnets 2 are fixedly embedded in the four layers of arc main slot units 6-1, arc auxiliary permanent magnets 3 are fixedly embedded in the arc auxiliary slots 7, and magnetic barriers 5 are arranged on two sides of the main permanent magnets 2, in the straight side wing slots 6-2 and in the arc auxiliary slots 7 on the outer sides of the auxiliary permanent magnets 3. The 4 groups of main permanent magnets 2 in the 4 rotor main groove units 6 adopt a radial alternating magnetizing mode. When a certain 4 layers of main permanent magnets 2 are magnetized radially outwards, auxiliary permanent magnets 3 in arc-shaped auxiliary grooves 7 on two sides of the main permanent magnets are magnetized outwards along the width direction; on the contrary, when the main permanent magnet 2 is magnetized radially inwards, the auxiliary permanent magnets 3 in the arc-shaped auxiliary grooves 7 on the two sides of the main permanent magnet are magnetized inwards along the width direction.
Further, the main permanent magnet 2 is made of rare earth neodymium iron boron materials, the auxiliary permanent magnet 3 is made of ferrite materials, the rotor core 1, the inner magnetic isolation bridge 8 and the outer magnetic isolation bridge 9 are made of high-permeability silicon steel sheet materials, and the magnetic barrier 5 is made of epoxy resin matrix composite materials.
Fig. 4 (a) and (b) and fig. 5 (a) and (b) show a conventional permanent magnet auxiliary reluctance motor and a magnetic force line distribution and a magnetic circuit schematic diagram of a permanent magnet adopting the motor structure of the invention. R in the figure Z 、R Z1 、R Z2 Is the magnetic resistance of the main permanent magnet, F Z 、F Z1 、F Z2 As the magnetomotive force of the main permanent magnet, R F 、R F The magnetic resistance and magnetomotive force of the auxiliary permanent magnet are respectively shown, and phi is the main magnetic flux under the magnetic pole. As shown in fig. 4 (a) and (B), in the conventional permanent magnet auxiliary reluctance motor structure, two groups of permanent magnets in the rotor slots form a parallel magnetic circuit B, and at the same time, a small amount of magnetic flux of the main permanent magnets is closed by adjacent magnetism isolating bridges, the magnetic circuit is short-circuited inside the rotor to form leakage magnetic flux a, and if the thickness of the magnetism isolating bridges is reduced for reducing the leakage magnetic flux, the mechanical strength of the motor rotor is correspondingly reduced. In the rotor structure of the present invention shown in fig. 5 (a) and (b), the main permanent magnet 2 and the auxiliary permanent magnet 3 form a series-parallel magnetic circuit D, the magnetic flux on the rotor core 1 between adjacent magnetic poles is mainly generated by the main permanent magnet 2, a part of the magnetic flux flowing through the air gap is generated by the main permanent magnet 2 along the magnetizing direction of the main permanent magnet, and the other part of the magnetic flux of the main permanent magnet 2 passes through the inner magnetic isolation bridge 8, but is not closed around the inner magnetic isolation bridge 8 to form a leakage magnetic flux C, but the seeking path passes through the auxiliary permanent magnet 3 to flow through the air gap as a part of the main magnetic flux to participate in the coupling of the motor electric energy, thereby reducing the reduction of the motor electromagnetic performance caused by the leakage of the main permanent magnet 2. Although a small amount of magnetic flux leakage exists at the position, close to the outer magnetic isolation bridge 9, of the outer diameter side of the rotor, of the auxiliary permanent magnet 3, ferrite materials are adopted for the auxiliary permanent magnet, and the cost is lower compared with that of rare earth permanent magnet materials adopted for the main permanent magnet. As shown in the magnetic force line distribution diagram (a) in fig. 5, the invention effectively reduces the magnetic leakage of the main permanent magnet 2, thereby improving the electromagnetic performance of the motor and the utilization rate of rare earth permanent magnet materials. When the motor works under the working condition of high rotating speed or high torqueThe motor rotor structure can increase the thickness of the inner magnetism isolating bridge 8 according to the requirement, reduce adverse effects on the electromagnetic performance of the motor, and improve the mechanical strength of the motor while inhibiting the magnetic leakage of main magnetic flux. Fig. 6 shows the no-load counter electromotive force waveform of the rotor motor adopting the invention, the motor is of a three-phase 48 stator slot 4 rotor pole motor structure, and the result shows that the motor can provide the no-load counter electromotive force waveform with better sine property, and the no-load counter electromotive force amplitude is close to 150V, thereby further proving the effectiveness of the motor rotor structure.
Although the embodiments of the present invention and the accompanying drawings have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the embodiments and the disclosure of the drawings.
Claims (10)
1. The rotor structure of the rare earth-less permanent magnet auxiliary synchronous reluctance motor is characterized by comprising a rotor core (1), a main permanent magnet (2), an auxiliary permanent magnet (3), a rotating shaft (4) and a magnetic barrier (5), wherein the rotor core (1) rotates around the rotating shaft; the rotor iron core (1) is uniformly provided with a plurality of rotor main groove units (6) along the circumference, each rotor main groove unit (6) comprises N layers of arc main grooves (6-1) and two straight side wing grooves (6-2) on two sides of the innermost layer of arc main grooves, N layers of arc auxiliary grooves (7) are extended on two sides of the N layers of arc main grooves (6-1) along the arc direction of the N layers of arc auxiliary grooves, each layer of arc main grooves (6-1) and the same layer of arc auxiliary grooves (7) are concentric, have the same radius and the same width, and air grooves (10) are further arranged in the rotor iron core (1) between the adjacent rotor main groove units (6); a main permanent magnet (2) and an auxiliary permanent magnet (3) are respectively arranged in the arc-shaped main groove (6-1) and the arc-shaped auxiliary groove (7); magnetic barriers (5) are distributed in the arc-shaped main grooves (6-1) on two sides of the main permanent magnet (2), in the straight flank grooves (6-2) and in the arc-shaped auxiliary grooves (7) on the outer side of the auxiliary permanent magnet (3).
2. The rotor structure of a rare earth-less permanent magnet-assisted synchronous reluctance motor according to claim 1, wherein the layers of the N-layer arc-shaped main grooves (6-1) are concentric, have equal widths and are equally spaced.
3. A rotor structure of a rare earth-less permanent magnet-assisted synchronous reluctance motor according to claim 1, characterized in that the N-layer arc-shaped main grooves (6-1) and the N-layer arc-shaped auxiliary grooves (7) are arc-shaped and open towards the outside of the rotor, the innermost arc-shaped main groove (6-1) and two straight flank grooves (6-2) on both sides thereof form a "U" shaped groove structure with the opening towards the inside of the rotor, and two adjacent straight flank grooves (6-2) of two adjacent "U" shaped grooves on the circumference of the rotor are on a straight line and separated by the rotor core (1).
4. The rotor structure of a rare earth-less permanent magnet auxiliary synchronous reluctance motor according to claim 1, wherein adjacent side lines of the arc-shaped auxiliary groove (7) and the arc-shaped main groove (6-1) are linear and parallel to each other, and a side line of the arc-shaped auxiliary groove (7) close to the outer diameter of the rotor core (1) is arc-shaped.
5. The rotor structure of the rare earth-less permanent magnet auxiliary synchronous reluctance motor according to claim 1, wherein an inner magnetic isolation bridge (8) is arranged between the arc-shaped main groove (6-1) and the arc-shaped auxiliary groove (7), the thickness of the inner magnetic isolation bridge (8) between each layer of the arc-shaped main groove (6-1) and the arc-shaped auxiliary groove (7) is equal, and an outer magnetic isolation bridge (9) is arranged between the outer side of the arc-shaped auxiliary groove (7) and the outer diameter of the rotor core.
6. The rotor structure of a rare earth-less permanent magnet-assisted synchronous reluctance motor according to claim 5, wherein the inner magnetic isolation bridge (8) and the outer magnetic isolation bridge (9) are made of high-permeability silicon steel sheet materials.
7. The rotor structure of a rare earth-less permanent magnet auxiliary synchronous reluctance motor according to claim 1, wherein main permanent magnets (2) in each rotor main slot unit (6) are magnetized in a radial alternating manner, and when N layers of main permanent magnets (2) in a certain rotor main slot unit (6) are magnetized radially outwards, auxiliary permanent magnets (3) in arc auxiliary slots (7) on two sides of the rotor main slot unit are magnetized outwards along the width direction of the main permanent magnets; on the contrary, when the main permanent magnet (2) is magnetized inwards in the radial direction, the auxiliary permanent magnets (3) in the arc-shaped auxiliary grooves (7) on the two sides of the main permanent magnet are magnetized inwards along the width direction of the main permanent magnet.
8. The rotor structure of a rare earth-less permanent magnet-assisted synchronous reluctance motor according to claim 1, wherein the main permanent magnet (2) is made of rare earth neodymium iron boron material, and the auxiliary permanent magnet (3) is made of ferrite material.
9. The rotor structure of a rare earth-less permanent magnet-assisted synchronous reluctance motor according to claim 1, wherein the magnetic barrier (5) is made of an epoxy resin-based composite material.
10. The rotor structure of a rare earth-less permanent magnet-assisted synchronous reluctance motor according to claim 1, wherein the rotor core (1) is made of high-permeability silicon steel sheet material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310682404.2A CN116780799B (en) | 2023-06-09 | 2023-06-09 | Rotor structure of rare earth-less permanent magnet auxiliary synchronous reluctance motor |
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| CN202310682404.2A CN116780799B (en) | 2023-06-09 | 2023-06-09 | Rotor structure of rare earth-less permanent magnet auxiliary synchronous reluctance motor |
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| CN116780799A true CN116780799A (en) | 2023-09-19 |
| CN116780799B CN116780799B (en) | 2024-08-16 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160308428A1 (en) * | 2013-12-25 | 2016-10-20 | Green Refrigeration Equipment Engineering Research Center Of Zhuhai Gree Co., Ltd. | Permanent Magnet Motor |
| CN109412293A (en) * | 2018-10-12 | 2019-03-01 | 东南大学 | A kind of mixed connection magnetic circuit memory electrical machine |
| CN112260434A (en) * | 2020-09-27 | 2021-01-22 | 中国第一汽车股份有限公司 | Vehicle permanent magnet synchronous motor rotor assembly, design method thereof and motor |
| CN218124420U (en) * | 2022-05-31 | 2022-12-23 | 安徽威灵汽车部件有限公司 | Rotor subassembly, PMSM, motor compressor, air conditioning system and vehicle |
| CN115800586A (en) * | 2022-12-12 | 2023-03-14 | 淮阴工学院 | Permanent magnet built-in synchronous motor rotor structure |
| CN115811158A (en) * | 2022-11-20 | 2023-03-17 | 天津大学 | Less-rare-earth built-in permanent magnet synchronous motor rotor structure for inhibiting magnetic leakage |
| CN115995932A (en) * | 2023-01-06 | 2023-04-21 | 淮阴工学院 | Permanent magnet synchronous motor |
-
2023
- 2023-06-09 CN CN202310682404.2A patent/CN116780799B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160308428A1 (en) * | 2013-12-25 | 2016-10-20 | Green Refrigeration Equipment Engineering Research Center Of Zhuhai Gree Co., Ltd. | Permanent Magnet Motor |
| CN109412293A (en) * | 2018-10-12 | 2019-03-01 | 东南大学 | A kind of mixed connection magnetic circuit memory electrical machine |
| CN112260434A (en) * | 2020-09-27 | 2021-01-22 | 中国第一汽车股份有限公司 | Vehicle permanent magnet synchronous motor rotor assembly, design method thereof and motor |
| CN218124420U (en) * | 2022-05-31 | 2022-12-23 | 安徽威灵汽车部件有限公司 | Rotor subassembly, PMSM, motor compressor, air conditioning system and vehicle |
| CN115811158A (en) * | 2022-11-20 | 2023-03-17 | 天津大学 | Less-rare-earth built-in permanent magnet synchronous motor rotor structure for inhibiting magnetic leakage |
| CN115800586A (en) * | 2022-12-12 | 2023-03-14 | 淮阴工学院 | Permanent magnet built-in synchronous motor rotor structure |
| CN115995932A (en) * | 2023-01-06 | 2023-04-21 | 淮阴工学院 | Permanent magnet synchronous motor |
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| CN116780799B (en) | 2024-08-16 |
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