CN218040941U - Switch reluctance motor with partitioned phase distribution - Google Patents
Switch reluctance motor with partitioned phase distribution Download PDFInfo
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- CN218040941U CN218040941U CN202222398026.9U CN202222398026U CN218040941U CN 218040941 U CN218040941 U CN 218040941U CN 202222398026 U CN202222398026 U CN 202222398026U CN 218040941 U CN218040941 U CN 218040941U
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Abstract
The utility model belongs to the switched reluctance motor field discloses a switch reluctance motor of subregion cloth looks, contain rotor core, stator core, centralized winding, rotor core circumference evenly sets up m rotor salient poles, stator core circumference evenly sets up three looks subregion, every looks subregion all sets up n stator tooth utmost point between two parties and corresponds with n rotor salient pole, and n = (m-1)/3 or n = (m-2)/3, stator tooth tip intermediate part is the tooth top, both sides part is the tooth wing, the tooth wing is greater than the distance of tooth top and rotor salient pole top with the distance of rotor salient pole top, every looks subregion all only installs a looks centralized winding, each looks centralized winding is centralized to be installed on each tooth, reduce the reverse torque that alternate magnetic leakage produced through subregion cloth looks technique, realize improving switched reluctance motor torque pulsation, noise and efficiency, form the ladder air gap through increasing the tooth wing and further improve torque pulsation, improve the production efficiency of winding simultaneously.
Description
Technical Field
The utility model relates to a switched reluctance motor field especially relates to a switched reluctance motor of subregion cloth looks.
Background
The switched reluctance motor has a series of advantages of simple structure, high reliability, low cost, strong fault-tolerant capability, wide speed regulation range and the like, but has the problems of large torque pulsation, high noise and low efficiency, and technicians usually attribute the problems to the reasons of nonlinear current change in the salient pole overlapping process, superposition of torque by pulse torque, mutual inductance between phases, stress pulsation deformation of a stator core and the like.
The switched reluctance motor stator core adopts an open type rectangular tooth structure, and the problem of difficult winding fixing exists.
Whether the real reason of the defect problem of the switched reluctance motor can be found out or not and the torque pulsation, noise and efficiency of the switched reluctance motor are improved is a problem which needs to be solved urgently in the prior art.
SUMMERY OF THE UTILITY MODEL
In order to improve prior art's not enough, the utility model aims at providing a switch reluctance motor of subregion cloth looks reduces the reverse torque that alternate magnetic leakage produced through subregion cloth looks technique, increases the tooth wing and forms the ladder air gap, can improve switch reluctance motor torque pulsation, noise and efficiency.
The utility model discloses a solve its technical problem and the technical scheme who adopts is:
a switched reluctance motor with partitioned phases comprises a rotor core, a stator core and a centralized winding, wherein m rotor salient poles are uniformly arranged on the rotor core in the circumferential direction, m is a natural number and is more than or equal to 7; the stator core is uniformly provided with three phase partitions in the circumferential direction, each phase partition is provided with n stator teeth in the middle to form n stator teeth poles corresponding to n rotor salient poles, n is a natural number and is not less than 2, and n = (m-1)/3 or n = (m-2)/3; the middle part of the end part of the stator tooth is a tooth top, the two side parts of the end part of the stator tooth are tooth wings, and the distance between the tooth wings and the polar top of the rotor salient pole is larger than the distance between the tooth top and the polar top of the rotor salient pole, so that a step air gap is formed between the stator core and the rotor core; each phase section is provided with only one phase of the concentrated winding, and each phase of the concentrated winding is concentrated on each stator tooth.
The utility model discloses in, furtherly, the tooth top is kept away from more to the tooth wing, and the air gap that forms between the rotor core is big more.
The utility model discloses in, furtherly, each looks centralized winding is on each stator tooth is installed to centralized to when making the circular telegram excitation of phase winding, the polarity of exitation of adjacent stator tooth between the adjacent phase is the same.
The utility model discloses in, furtherly, stator core is split type structure, and each looks subregion is an independent iron core module, and three independent iron core module makes up stator core.
The utility model discloses in, furtherly, stator core's stator tooth sets up on stator yoke portion, and stator yoke portion is less than the 1/2 of other position thickness in the radial effective thickness of boundary department of three looks subregion.
The principle of the utility model is that: the teeth of each phase of a stator core of a switched reluctance motor in the prior art are arranged in a staggered mode, namely, a pair of teeth coils of any phase is necessarily intersected with a pair of teeth coils of another phase in a magnetic circuit, a shared magnetic circuit exists, when the phase is switched and electrified, an aligned air gap between a stator tooth of the previous phase and a salient pole of a rotor is smaller, an unaligned air gap between a stator tooth of the next phase and the salient pole of the rotor is larger, and a next communicated electromagnetic circuit passes through the magnetic circuit of the previous phase. And the utility model discloses an adopt subregion cloth looks technique, the stator tooth constitutes independent and shortest closed magnetic circuit with the rotor salient pole in the looks subregion, does not have shared magnetic circuit between the looks, and the event reducible alternate magnetic leakage negative torque to improve torque ripple and raise the efficiency.
Since the technical scheme is used, the beneficial effects of the utility model are that:
1. the utility model reduces the reverse torque generated by the interphase magnetic leakage by adopting the partitioned phase distribution technology, and improves the torque pulsation, noise and efficiency of the switched reluctance motor; and a step air gap is formed by adding tooth wings, and the step air gap generates step magnetic resistance, so that more uniform variable inductance and variable magnetic resistance are formed, and torque pulsation is further improved.
2. The utility model discloses a be split type structure with the stator core design, not only can reduce the mould cost, still can realize using machinery directly on the winding arrives the iron core module outward, realize the automatic installation of winding, improve production efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a switched reluctance motor with partitioned phases.
Fig. 2 is a schematic structural diagram of a stator core in embodiment 2 of the present invention.
Fig. 3 is a schematic structural diagram of an iron core module of a stator core in embodiment 2 of the present invention.
The meanings of the labels in the figures are: 10-rotor core, 11-rotor salient pole, 20-stator core, 21-stator tooth, 22-tooth wing, 23-core module, 30-concentrated winding.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by the following embodiments with reference to the accompanying fig. 1-3. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model aims to improve current switched reluctance motor, improve its torque ripple big, the noise is high, the problem of inefficiency. Referring to fig. 1, the switched reluctance motor of the present invention includes a rotor core 10, a stator core 20, and a centralized winding 30, wherein m rotor salient poles 11 are uniformly arranged in the circumferential direction of the rotor core 10, m is a natural number, and m is greater than or equal to 7; the stator core 20 is circumferentially and uniformly provided with three phase partitions, which are a U phase, a V phase, and a W phase, respectively, each phase partition is centrally provided with n stator teeth 21 to form n stator teeth poles corresponding to the n rotor salient poles 11, n is a natural number, n is greater than or equal to 2, and n = (m-1)/3 or n = (m-2)/3, where a value of m must ensure that n is a natural number, for example, a common value may be: m =7,n = (m-1)/3 =2; m =8, n = (m-2)/3 =2; m =10,n = (m-1)/3; m =11, (m-2)/3 =3; m =13,n = (m-1)/3 =4; m =14, n = (m-2)/3 =4; m =16,n = (m-1)/3 =5; the middle part of the end part of the stator tooth 21 is a tooth crest, the two side parts are tooth wings 22, and the distance between the tooth wings 22 and the pole top of the rotor salient pole 11 is larger than the distance between the tooth crest and the pole top of the rotor salient pole 11, so that a step air gap is formed between the stator core 20 and the rotor core 10; only one phase of the concentrated winding 30 is installed in each phase section, and the concentrated winding 30 in each phase is installed in a concentrated manner to each stator tooth 21. The drawings of the utility model show an inner rotor type motor, which can also be an outer rotor type motor.
By this design, the stator teeth 21 and the rotor salient poles 11 in the phase division form independent and shortest closed magnetic paths by passing current through the windings, and referring to the magnetic paths shown by the dotted lines in fig. 1, there is no shared magnetic path between the phases, so that the flux leakage negative torque between the phases can be reduced, thereby improving torque ripple and improving efficiency. The tooth wings 22 are added to form a stepped air gap, and the stepped air gap generates stepped magnetic resistance, so that more uniform variable inductance and variable magnetic resistance are formed, and torque pulsation is further improved.
In some preferred embodiments of the present invention, the farther the tooth wing 22 is away from the tooth top, the larger the air gap formed between the tooth wing and the rotor core 10. And a step air gap is further formed, so that more uniform variable inductance and variable reluctance are formed, and torque pulsation is improved.
In some preferred embodiments of the present invention, the concentrated winding 30 of each phase is concentrated to be mounted on each stator tooth 21, and when the phase winding is energized, the adjacent stator teeth 21 between the adjacent phases have the same excitation polarity. Through the design, the same-pole repulsion between adjacent phases blocks an interphase magnetic circuit, and the flux leakage negative torque between the phases can be further reduced, so that the torque pulsation is improved, and the efficiency is improved.
In some preferred embodiments of the present invention, the stator core 20 is a split structure, each phase partition is an independent core module 23, and three independent core modules 23 are combined into one stator core 20. Through the design, the cost of the die can be reduced, the direct outward winding of the winding on the iron core module 23 by using machinery can be realized, the automatic installation of the winding is realized, and the production efficiency is improved.
The utility model discloses some preferred embodiments, stator core's stator tooth sets up on stator yoke portion, and stator yoke portion is less than 1/2 of other position thickness in the radial effective thickness of the boundary department of three looks subregion. Through the design, the cross section area of a magnetic circuit is reduced between adjacent phases, and the flux leakage negative torque between phases can be further reduced, so that the torque pulsation is improved, and the efficiency is improved.
Example 1
Referring to fig. 1, the switched reluctance motor of the present embodiment includes a rotor core 10, a stator core 20, and a concentrated winding 30, where the rotor core 10 is circumferentially and uniformly provided with 10 rotor salient poles 11; the stator core 20 is uniformly provided with three phase partitions in the circumferential direction, namely a U phase, a V phase and a W phase, and each phase partition is centrally provided with 3 stator teeth 21 to form 3 stator teeth poles corresponding to 3 rotor salient poles 11; the middle part of the end part of the stator tooth 21 is a tooth top, the two side parts are tooth wings 22, and the distance between the tooth wings 22 and the pole top of the rotor salient pole 11 is greater than the distance between the tooth top and the pole top of the rotor salient pole 11, so that a step air gap is formed between the stator core 20 and the rotor core 10, and the farther the tooth wings 22 are away from the tooth top, the larger the air gap formed between the tooth wings 22 and the rotor core 10 is, the further step air gap is formed, thereby forming more uniform variable inductance and variable reluctance and improving torque pulsation; each phase section is mounted with only one phase of the concentrated winding 30, and each phase concentrated winding 30 is mounted in a concentrated manner to each stator tooth 21.
In this embodiment, it is preferable that each phase concentrated winding 30 is concentrated on each stator tooth 21, and when the phase winding is energized, the adjacent stator teeth 21 between the adjacent phases have the same excitation polarity. Through the design, like poles repel each other between adjacent phases to block an interphase magnetic circuit, and interphase magnetic leakage negative torque can be further reduced, so that torque pulsation is improved, and efficiency is improved.
In the embodiment, the stator teeth of the stator core are arranged on the stator yoke, and the radial effective thickness of the stator yoke at the boundary of three phase partitions is less than 1/2 of the thickness of other parts, so that the cross section area of a magnetic circuit between adjacent phases is reduced, the flux leakage negative torque between phases can be further reduced, and the torque pulsation is improved and the efficiency is improved.
Example 2
Referring to fig. 2 and 3, the present invention is different from embodiment 1 in that the stator core 20 is a split structure, each phase partition is an independent core module 23, and three independent core modules 23 are combined into the stator core 20. Through the design, the cost of the die can be reduced, the direct outward winding of the winding on the iron core module 23 by using machinery can be realized, the automatic installation of the winding is realized, and the production efficiency is improved.
Any of the present invention is to create new things through the application and combination of the prior art, and there is an infinite possibility for the primary and secondary judgment of numerous technical problems and the application and combination of numerous technical means, and the above description is only the description of the preferred embodiment of the present invention, and it should be pointed out that there is an infinite concrete structure objectively due to the limitation of the expression of characters, and for those skilled in the art, without departing from the principle of the present invention, several improvements can be made, and these improvements should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a switch reluctance motor of subregion cloth looks which characterized in that: the motor comprises a rotor core, a stator core and a centralized winding, wherein m rotor salient poles are uniformly arranged on the rotor core in the circumferential direction, m is a natural number and is more than or equal to 7; the stator core is uniformly provided with three phase partitions in the circumferential direction, each phase partition is provided with n stator teeth in the center to form n stator teeth poles corresponding to n rotor salient poles, n is a natural number and is not less than 2, and n = (m-1)/3 or n = (m-2)/3; the middle part of the end part of the stator tooth is a tooth top, the two side parts of the end part of the stator tooth are tooth wings, and the distance between the tooth wings and the polar top of the rotor salient pole is larger than the distance between the tooth top and the polar top of the rotor salient pole, so that a step air gap is formed between the stator core and the rotor core; only one phase of the concentrated winding is installed in each phase section, and each phase of the concentrated winding is installed in a concentrated manner on each stator tooth.
2. The phase-partitioned switched reluctance motor according to claim 1, wherein: the farther the tooth wing is away from the tooth top, the larger the air gap is formed between the tooth wing and the rotor core.
3. The phase-partitioned switched reluctance motor according to claim 1, wherein: the concentrated winding of each phase is concentrated on each stator tooth, and when the phase winding is electrified and excited, the excitation polarities of the adjacent stator teeth between the adjacent phases are the same.
4. The phase-partitioned switched reluctance motor according to claim 1, wherein: the stator core is of a split structure, each phase partition is an independent core module, and the three independent core modules are combined into the stator core.
5. The phase-partitioned switched reluctance motor according to claim 1, wherein: stator teeth of the stator core are arranged on a stator yoke, and the radial effective thickness of the stator yoke at the boundary of the three phase partitions is smaller than 1/2 of the thickness of other parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222398026.9U CN218040941U (en) | 2022-09-09 | 2022-09-09 | Switch reluctance motor with partitioned phase distribution |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222398026.9U CN218040941U (en) | 2022-09-09 | 2022-09-09 | Switch reluctance motor with partitioned phase distribution |
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| CN218040941U true CN218040941U (en) | 2022-12-13 |
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| CN202222398026.9U Active CN218040941U (en) | 2022-09-09 | 2022-09-09 | Switch reluctance motor with partitioned phase distribution |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117477816A (en) * | 2023-11-07 | 2024-01-30 | 沈阳工业大学 | Cylindrical-conical hybrid rotor bearingless switched reluctance motor |
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2022
- 2022-09-09 CN CN202222398026.9U patent/CN218040941U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117477816A (en) * | 2023-11-07 | 2024-01-30 | 沈阳工业大学 | Cylindrical-conical hybrid rotor bearingless switched reluctance motor |
| CN117477816B (en) * | 2023-11-07 | 2024-04-26 | 沈阳工业大学 | Cylindrical-conical hybrid rotor bearingless switched reluctance motor |
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