CN110429778B - U-shaped switched reluctance motor with double-stator structure for electric vehicle - Google Patents
U-shaped switched reluctance motor with double-stator structure for electric vehicle Download PDFInfo
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- CN110429778B CN110429778B CN201910819153.1A CN201910819153A CN110429778B CN 110429778 B CN110429778 B CN 110429778B CN 201910819153 A CN201910819153 A CN 201910819153A CN 110429778 B CN110429778 B CN 110429778B
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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
- H02K16/04—Machines with one rotor and two stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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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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Abstract
The invention relates to the technical field of motors, and discloses a U-shaped switched reluctance motor with a double-stator structure for an electric vehicle, which specifically comprises the following components: the rotor comprises a rotor with double-sided teeth, and an inner stator supporting part with the same axis is arranged on the inner side of the rotor; the stator is characterized in that an outer stator supporting part with the same axis is arranged on the outer side of the rotor, N stator blocks are uniformly distributed on the inner stator supporting part and the outer stator supporting part respectively in the circumferential direction, the stator blocks are of a U-shaped structure, each stator block is provided with two stator teeth, each stator tooth is provided with a concentrated winding, and the two stator teeth on each stator block are opposite in polarity; in the working state, the inner stator block and the outer stator block are respectively conducted with one phase, the two phases have a certain space included angle alpha, and the polarities of the adjacent stator teeth on the two phases of the inner stator block and the adjacent outer stator block are the same. The motor provided by the invention has the advantages of large torque density, high efficiency and small torque pulsation, and has good engineering application value.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a U-shaped switched reluctance motor with a double-stator structure for an electric vehicle.
Background
The switched reluctance motor has the advantages of simple structure, firmness, durability, reliable operation, high energy conversion efficiency and the like, so that the switched reluctance motor is more and more widely applied to the electric vehicle. The cost of the motor using the permanent magnet is increased due to the rapid increase in price of the rare earth material. The switched reluctance motor follows the minimum reluctance principle, so that a magnetic circuit of the switched reluctance motor has an important function on energy conversion of the switched reluctance motor, and the application of a magnetic material with good performance and the shortening of a magnetic flux path are both beneficial to reducing energy loss of the motor. When a phase of work exists between the adjacent phases of the traditional double-stator switched reluctance motor, the other phases are interfered with each other through a rotor salient pole, so that a magnetic flux path is longer, and a magnetic flux reversal phenomenon exists during the phase change of the motor rotation, so that the output torque of the motor is reduced, the iron loss is increased, the wind friction loss is increased, and the motor efficiency is reduced. And the traditional double-stator switched reluctance motor increases the torque pulsation of the motor while increasing the electromagnetic torque of the motor. Therefore, in the stage of motor structure design, how to increase the output torque of the motor, reduce the torque ripple of the motor, and improve the output efficiency of the motor becomes an urgent problem to be solved in the stage of motor structure design.
Disclosure of Invention
The invention aims to provide a U-shaped double-stator structure switched reluctance motor for an electric vehicle, which has the advantages of high torque density, high efficiency and small torque pulsation.
In order to achieve the purpose, the invention is implemented according to the following technical scheme: a U-shaped double-stator structure switched reluctance motor for an electric vehicle comprises a rotor with double-sided teeth, wherein an inner stator supporting part with the same axis is arranged on the inner side of the rotor; an outer stator supporting part with the same axis is arranged on the outer side of the rotor, N inner stator blocks are uniformly distributed on the outer wall of the inner stator supporting part along the circumference, N outer stator blocks are uniformly distributed on the inner wall of the outer stator supporting part along the circumferential direction, and N is a positive even number; the inner stator block and the outer stator block are both of U-shaped structures, the opening direction of the inner stator block faces the rotor, the central angles of the inner stator block and the outer stator block are the same, the inner stator block and the outer stator block are respectively provided with two stator teeth forming the U-shaped structures, each stator tooth is provided with a concentrated winding, and the polarities of the two stator teeth on each inner stator block or each outer stator block are opposite; two radially opposite outer stator blocks are connected in series to form a phase, and two radially opposite inner stator blocks are connected in series to form a phase; in the working state, the inner stator block and the outer stator block are respectively conducted with one phase, the two phases have a certain space included angle alpha, alpha is larger than the central angle of the inner stator block, and the polarities of the adjacent stator teeth on the two phases of the inner stator block and the adjacent outer stator block are the same.
Preferably, the rotor includes rotor body, a plurality of internal tooth and external tooth, and the internal tooth is along the inboard circumference equipartition of rotor body, and the external tooth is along the outside circumference equipartition of rotor body, and internal tooth and external tooth quantity are the same, and the central line of internal tooth and external tooth is located the radial direction of rotor, and adjacent internal tooth and external tooth central line have mechanical contained angle theta.
Preferably, the mechanical included angle θ is 1 to 4 °.
Description of the principle: 1. the inner stator sub-block and the outer stator sub-block are of U-shaped structures and are respectively provided with two stator teeth, and the polarity of the two stator teeth on each inner stator sub-block or each outer stator sub-block is opposite; two radially opposite outer stator blocks are connected in series to form a phase, and two radially opposite inner stator blocks are connected in series to form a phase; under the working state, the inner stator blocks and the outer stator blocks are respectively conducted with one phase, the two phases have a certain space included angle alpha, alpha is larger than the central angle of the inner stator blocks, the polarities of adjacent stator teeth on the two phases of the inner stator blocks are the same as those of adjacent stator teeth on the adjacent outer stator blocks, under the working state, magnetic fields generated by the adjacent inner stator blocks and magnetic fields generated by the outer stator blocks repel each other, namely, magnetic lines of force generated by an outer stator block winding are closed through U-shaped stator teeth, an outer layer air gap, rotor outer teeth and a rotor yoke, and magnetic lines of force generated by the inner stator block winding are closed through the U-shaped stator teeth, the inner layer air gap, the rotor inner teeth and the rotor yoke. Therefore, the magnetic fields generated by the inner and outer stator block windings can be decoupled through space, and the outer stator block magnetic field and the inner stator block magnetic field are respectively controlled according to requirements;
2. according to the explanation of the principle explanation 1, the motor can form a shorter magnetic flux path in a working state, the iron core loss of the motor is reduced, the output torque of the motor is increased, and the output efficiency of the motor is further improved;
3. the center lines of the inner teeth of the rotor and the outer teeth of the rotor are staggered by an angle, so that a torque peak value generated by the inner stator of the motor is superposed with a torque valley value generated by the outer stator, the torque valley value generated by the inner stator of the motor is superposed with the torque peak value generated by the outer stator, and the torque pulsation of the motor can be reduced.
The invention has the beneficial effects that: the motor provided by the invention has the advantages of large torque density, high efficiency and small torque pulsation, and has good engineering application value.
Drawings
Fig. 1 is a schematic view of a radial structure of embodiment 1 of the present invention.
Fig. 2 is a stator tooth polarity distribution diagram of fig. 1 in accordance with the present invention.
Fig. 3 is a schematic view of a rotor structure according to embodiment 1 of the present invention.
Fig. 4 is a motion state diagram of the motor at the time 1 according to the embodiment 1 of the present invention.
Fig. 5 is a motion state diagram of the motor at the time 2 according to the embodiment 1 of the present invention.
Fig. 6 is a motion state diagram of the motor at the time point 3 according to the embodiment 1 of the present invention.
Fig. 7 is a motion state diagram of the motor at the time 4 according to the embodiment 1 of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and specific embodiments, which are illustrative of the invention and are not to be construed as limiting the invention.
Example 1
As shown in fig. 1-3, the present embodiment provides a U-shaped dual-stator structure switched reluctance motor for an electric vehicle with 8-phase 16/18 poles (inner stator 4 phase, outer stator 4 phase, stator pole number is 16, and rotor pole number is 18), which includes a rotor 1 with double-sided teeth, the rotor includes a rotor body 101, inner teeth 102 and outer teeth 103, 18 inner teeth 102 are uniformly distributed along the inner circumference of the rotor body 101, 18 outer teeth 103 are uniformly distributed along the outer circumference of the rotor body 101, the center lines of the inner teeth 102 and the outer teeth 103 are located in the radial direction of the rotor 1, in order to reduce the torque ripple of the motor, the center lines of adjacent inner teeth 102 and outer teeth 103 have an included angle θ, θ =4 °;
the inner side of the rotor 1 is provided with an inner stator supporting part 2 with the same axle center; an outer stator supporting part 3 with the same axis is arranged on the outer side of the rotor 1, 8 inner stator blocks 4 are uniformly distributed on the outer wall of the inner stator supporting part 2 along the circumferential direction, and 8 outer stator blocks 5 are uniformly distributed on the inner wall of the outer stator supporting part 3 along the circumferential direction; the inner stator sub-block 4 and the outer stator sub-block 5 are both of a U-shaped structure, the opening directions of the inner stator sub-block 4 and the outer stator sub-block 5 face the rotor 2, the inner stator sub-block 4 and the outer stator sub-block 5 are respectively provided with two stator teeth 6, concentrated windings 7 are arranged on the stator teeth 4, two outer stator sub-blocks 5 which are opposite in the radial direction are connected in series to form a phase, two inner stator sub-blocks 4 which are opposite in the radial direction are connected in series to form a phase, as shown in figure 1, A and A 'form an A phase, B and B' form a B phase, C and C 'form a C phase, D and D' form a D phase, E and E 'form an E phase, F and F' form an F phase, G and G 'form a G phase, and H' form an H phase;
the end faces of the stator teeth of all the outer stator sub-blocks 5 are positioned on a circular face coaxial with the rotor 1, and outer layer air gaps are formed between the outer stator sub-blocks and the rotor 1; the end faces of the stator teeth of all the inner stator sub-blocks 4 are positioned on a circular surface coaxial with the rotor 1, and an inner layer air gap is formed between the inner stator teeth and the rotor 1; the outer stator blocks 5 and the inner stator blocks 4 are in one-to-one correspondence, the two stator teeth of the corresponding outer stator blocks 5 and the inner stator blocks 4 are in one-to-one correspondence in the radial line direction, by the winding pattern of fig. 1, from the a inner stator segment and the E outer stator segment, in a counterclockwise sequence, as shown in fig. 2, under the condition of both conduction or respectively conduction, the polarity distribution of the stator teeth of the outer stator block 5 is N-S-S-N-N-S-S-N-N-S-S-N in sequence, and the polarity distribution of the stator teeth of the inner stator block 4 is S-N-N-S-S-N-N-S-S-N-S in sequence.
As shown in fig. 4-7 (the outer stator support portion 3 is omitted in the drawing), in the operating state of the present embodiment, the two phases that are conducted are separated by a space angle α =90 °, the G-phase and the a-phase are conducted at time 1, the H-phase and the B-phase are conducted at time 2, the E-phase and the C-phase are conducted at time 3, the F-phase and the D-phase are conducted at time 4, and the dotted line with an arrow in fig. 4-7 indicates the direction of the magnetic flux line at that time. So as to ensure that the polarities of the adjacent stator teeth on the two-phase inner stator blocks 4 and the adjacent outer stator blocks 5 which are conducted at each moment are the same under the conducting state of the coil. The magnetic field generated by the adjacent inner stator block 4 and the magnetic field generated by the outer stator block 5 repel each other, namely, the magnetic line generated by the winding of the outer stator block 5 is closed through the U-shaped stator teeth, the outer layer air gap, the outer rotor teeth and the rotor yoke, and the magnetic line generated by the winding of the inner stator block 4 is closed through the U-shaped stator teeth, the inner layer air gap, the inner rotor teeth and the rotor yoke. Therefore, the magnetic fields generated by the windings of the inner stator block 5 and the outer stator block 5 can be decoupled through space, and the magnetic fields of the outer stator and the inner stator are respectively controlled according to requirements.
In particular use, the rotor 1 is provided as a squirrel cage structure or other structure supporting its rotation without interfering with the outer stator segment 5 and the inner stator segment 4, which is well known to those skilled in the art and the present embodiment will not be described or illustrated in detail.
The technical solution of the present invention is not limited to the above-mentioned specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (1)
1. A U-shaped double-stator structure switched reluctance motor for an electric vehicle comprises a rotor with double-sided teeth, wherein an inner stator supporting part with the same axis is arranged on the inner side of the rotor; the rotor outside is equipped with the outer stator supporting part with the axle center, its characterized in that: n inner stator blocks are uniformly distributed on the outer wall of the inner stator supporting part along the circumference, N outer stator blocks are uniformly distributed on the inner wall of the outer stator supporting part along the circumferential direction, and N is a positive even number; the inner stator block and the outer stator block are both of U-shaped structures, the opening direction of the inner stator block faces the rotor, the central angles of the inner stator block and the outer stator block are the same, the inner stator block and the outer stator block are respectively provided with two stator teeth forming the U-shaped structures, each stator tooth is provided with a concentrated winding, and the polarities of the two stator teeth on each inner stator block or each outer stator block are opposite; two radially opposite outer stator blocks are connected in series to form a phase, and two radially opposite inner stator blocks are connected in series to form a phase; in the working state, the inner stator block and the outer stator block are respectively conducted with one phase, the two phases have a certain space included angle alpha, alpha is larger than the central angle of the inner stator block, the polarities of adjacent stator teeth on the two-phase inner stator block and the adjacent outer stator block are the same, the rotor comprises a rotor body, a plurality of inner teeth and outer teeth, the inner teeth are uniformly distributed along the inner circumference of the rotor body, the outer teeth are uniformly distributed along the outer circumference of the rotor body, the number of the inner teeth and the number of the outer teeth are the same, the central lines of the inner teeth and the outer teeth are positioned in the radial direction of the rotor, the central lines of the adjacent inner teeth and the outer teeth have a mechanical included angle theta which is 1-4 degrees, in the working state, the conducted two-phase difference space angle alpha is 90 degrees, G phase and A phase are conducted at the moment 1, H phase and B phase are conducted at the moment 2, E phase and C phase are conducted at the moment 3, and F phase and D phase are conducted at the moment 4, the magnetic field generated by the adjacent inner stator blocks is repelled with the magnetic field generated by the outer stator blocks, namely the magnetic lines of force generated by the outer stator block winding are closed through the U-shaped stator teeth, the outer layer air gap, the outer rotor teeth and the rotor yoke, the magnetic lines of force generated by the inner stator block winding are closed through the U-shaped stator teeth, the inner layer air gap, the inner rotor teeth and the rotor yoke, and further the magnetic fields generated by the inner and outer stator block windings can be decoupled through space.
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| CN201910819153.1A CN110429778B (en) | 2019-08-31 | 2019-08-31 | U-shaped switched reluctance motor with double-stator structure for electric vehicle |
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| CN201910819153.1A CN110429778B (en) | 2019-08-31 | 2019-08-31 | U-shaped switched reluctance motor with double-stator structure for electric vehicle |
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| CN110429778B true CN110429778B (en) | 2022-08-02 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102016250B1 (en) * | 2018-02-08 | 2019-08-29 | 엘지전자 주식회사 | Dual rotor type motor improved stator structure |
| CN111064332A (en) * | 2020-01-08 | 2020-04-24 | 武汉理工大学 | Bilateral Halbach alternate pole type permanent magnet vernier motor |
| DE102020104647A1 (en) * | 2020-02-21 | 2021-08-26 | Bauer Gear Motor GmbH | Reluctance motor with three-phase current and system |
| CN111181271B (en) * | 2020-02-25 | 2023-12-19 | 山东大学 | Double-stator misplaced rotor tooth magnetic flux switching type permanent magnet motor and electromagnetic equipment |
| CN112436704B (en) * | 2020-11-30 | 2021-11-23 | 江苏大学 | Radial double-winding switch reluctance motor for electric automobile and power converter thereof |
| CN112994535B (en) * | 2021-02-22 | 2022-10-28 | 中国矿业大学 | Novel power converter for double-stator switch reluctance motor |
| CN113098218B (en) * | 2021-03-25 | 2023-01-13 | 西安交通大学 | Modularized double-stator block rotor permanent magnet auxiliary switch reluctance motor |
| CN113098219A (en) * | 2021-04-11 | 2021-07-09 | 郑州大学 | Hybrid winding doubly-salient rare-earth-free motor for new energy automobile and control strategy thereof |
| CN113285570A (en) * | 2021-04-13 | 2021-08-20 | 中国矿业大学 | Double-stator switched reluctance wheel-side motor for intelligent network-connected electric automobile |
| WO2023123638A1 (en) * | 2021-12-29 | 2023-07-06 | 大富科技(安徽)股份有限公司 | Switched reluctance motor structure, hub motor, and vehicle |
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