CN215646410U - Rotor of synchronous reluctance motor and motor - Google Patents
Rotor of synchronous reluctance motor and motor Download PDFInfo
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- CN215646410U CN215646410U CN202121859841.XU CN202121859841U CN215646410U CN 215646410 U CN215646410 U CN 215646410U CN 202121859841 U CN202121859841 U CN 202121859841U CN 215646410 U CN215646410 U CN 215646410U
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Abstract
The utility model discloses a rotor of a synchronous reluctance motor and the motor, relating to the technical field of motors, wherein the rotor of the synchronous reluctance motor comprises: rotor core, rotor core are equipped with a plurality of magnetic barriers group along circumference, and magnetic barriers group includes a plurality of magnetic barriers of arranging along radial interval, and the both ends of magnetic barrier all are equipped with the magnetic bridge, and the magnetic bridge width of every magnetic barrier is inequality in same magnetic barrier group, and the magnetic bridge width of the magnetic barrier nearest from rotor core axle center is the biggest. Compared with the rotor of the traditional synchronous reluctance motor, the rotor of the synchronous reluctance motor has the advantages that the arrangement enables the width of the magnetic bridge of the magnetic barrier close to the position where the rotor core is closest to the axis and the stress is the largest to be increased, so that the structural strength of the rotor is ensured; the width of a local magnetic bridge with smaller stress is correspondingly reduced when the magnetic bridge is far away from the axle center of the rotor iron core, and the smaller the width of the magnetic bridge is, the better the magnetic isolation effect is, namely the less the magnetic leakage is, so that the problem of the magnetic leakage of the rotor magnetic bridge is effectively reduced, and the torque output capacity of the synchronous reluctance motor is improved.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a rotor of a synchronous reluctance motor and the motor.
Background
The synchronous reluctance motor is a motor which utilizes the inductance difference between a D shaft and a Q shaft of the motor to generate reluctance torque to drive a rotor to drive a rotating shaft to rotate, the operation of the synchronous reluctance motor follows the 'reluctance minimum principle', and the output torque of the motor and the inductance difference between the D shaft and the Q shaft form a positive correlation relationship. In order to obtain higher torque, a plurality of magnetic barriers are machined on the rotor core. The rotor edge magnetic bridge is a very important part in the rotor core and plays a role in connecting each magnetic conduction layer of the rotor core. The magnetic flux generated by the stator magnetic field can be closed at the edge of the rotor without passing through the inside of the rotor, the inductance of the Q shaft can be increased by the magnetic flux leakage, the inductance difference between the D shaft and the Q shaft is reduced, the reluctance torque output capacity of the synchronous reluctance motor can be reduced, and the output efficiency and the power factor of the synchronous reluctance motor are further influenced. Therefore, in electromagnetic design, it is desirable that the width of the rotor edge bridge be as narrow as possible. However, the rotor edge magnetic bridges have a large influence on the structural strength of the rotor, and the centrifugal force generated by the rotation of the magnetic conduction layer inside the rotor is borne by the rotor edge magnetic bridges. Therefore, it is desirable from the viewpoint of structural design that the width of the edge magnetic bridge is as wide as possible here.
In the prior art, the widths of the edge magnetic bridges of the synchronous reluctance motor are generally uniform, and the widths of the edge magnetic bridges are generally designed to be wider in order to ensure corresponding structural strength and facilitate production, so that the torque output of the synchronous reluctance motor is influenced. The point of the rotor core which is stressed most in the prior art is located at the position of the first magnetic bridge, namely, the position close to the D shaft, because the first magnetic bridge bears more magnetic conductive bars, the mass is larger and the centrifugal force is larger when the rotor rotates. The magnetic bridges at other positions are stressed less and have larger stress difference with the first magnetic bridge, so that the magnetic flux generated by the stator has more magnetic flux leakage at the position, and the torque output of the motor is influenced.
SUMMERY OF THE UTILITY MODEL
1. Technical problem to be solved by the utility model
The utility model provides a rotor of a synchronous reluctance motor and a motor, aiming at the technical problem that the torque output capacity of the synchronous reluctance motor is reduced due to the fact that the width of a magnetic bridge at the edge of the rotor is wide in order to ensure the structural strength of the rotor of the synchronous reluctance motor.
2. Technical scheme
In order to solve the problems, the technical scheme provided by the utility model is as follows:
a rotor of a synchronous reluctance machine comprising: the rotor core, rotor core is equipped with a plurality of magnetic barriers group along circumference, and magnetic barriers group includes a plurality of magnetic barriers of radially arranging along the interval, and the both ends of magnetic barrier all are equipped with the magnetic bridge, and the magnetic bridge width of every magnetic barrier is inequality in the same magnetic barrier group, and the magnetic bridge width of the magnetic barrier nearest from rotor core axle center is the biggest.
According to the mutual coupling relation of the stress between the magnetic bridges, and the combination of the stress analysis result, namely the centrifugal force generated by the rotation of the rotor is borne by the magnetic bridges, and the larger the centrifugal force borne by the magnetic bridge of the magnetic barrier close to the rotor core is, the larger the influence on the structural strength of the rotor is, in the utility model, the width of each magnetic barrier in each magnetic barrier group is adjusted, the width of each magnetic bridge in the same magnetic barrier group is different, the width of the magnetic barrier closest to the axis of the rotor core (namely the magnetic barrier close to the D axis) is the largest, compared with the traditional rotor of a synchronous reluctance motor with the same width of the magnetic bridge of each magnetic barrier in the same magnetic barrier group, the arrangement enables the magnetic bridge width of the magnetic barrier close to the axis of the rotor core to be the nearest, and the maximum stress position is increased, so that the structural strength of the rotor is ensured; the width of the local magnetic bridge with smaller stress is correspondingly reduced when the magnetic bridge is far away from the axis of the rotor core, and the smaller the width of the magnetic bridge is, the better the magnetic isolation effect is, namely the less the magnetic leakage is, so that the magnetic leakage problem of the rotor magnetic bridge is effectively reduced. Therefore, the rotor of the synchronous reluctance motor can improve the torque output capacity of the synchronous reluctance motor while ensuring the corresponding structural strength of the rotor, and further improve the performances of the synchronous reluctance motor, such as efficiency, power factor, maximum rotating speed and the like.
Optionally, rotor core is equipped with 4 magnetic barrier groups along circumference, and every magnetic barrier group includes 5 magnetic barriers along radially arranging at an interval, and the both ends of every magnetic barrier all are equipped with the magnetic bridge, along rotor core's radial direction, outwards be first magnetic barrier, second magnetic barrier, third magnetic barrier, fourth magnetic barrier and fifth magnetic barrier in proper order from inside to outside respectively, correspond the magnetic bridge and be first magnetic bridge, second magnetic bridge, third magnetic bridge, fourth magnetic bridge and fifth magnetic bridge in proper order.
Optionally, a magnetic conduction channel is arranged between adjacent magnetic barriers.
Optionally, the rotor core is formed by laminating a plurality of rotor punching sheets.
Optionally, the rotor punching sheet is a silicon steel sheet.
Optionally, the magnetic barrier is U-shaped.
Optionally, the magnetic barrier is arc-shaped.
Optionally, the width of each magnetic barrier is the same.
Optionally, the magnetic barrier is an air magnetic barrier.
Meanwhile, the present invention also provides a motor, comprising: the rotor and the stator of the synchronous reluctance motor are provided.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:
(1) the rotor of the synchronous reluctance motor provided by the embodiment of the application has a simple structure, the width of each magnetic barrier in each magnetic barrier group is adjusted, the width of the magnetic bridge of each magnetic barrier in the same magnetic barrier group is set to be different, the width of the magnetic bridge of the magnetic barrier closest to the axis of a rotor core (namely the magnetic barrier close to the position of a D shaft) is the largest, and compared with the rotor of the synchronous reluctance motor with the same width of the magnetic bridge of each magnetic barrier in the same traditional magnetic barrier group, the arrangement enables the width of the magnetic bridge of the magnetic barrier close to the axis of the rotor core to be the nearest and the width of the magnetic bridge of the magnetic barrier at the position with the largest stress to be increased, so that the structural strength of the rotor is ensured; the width of the local magnetic bridge with smaller stress is correspondingly reduced when the magnetic bridge is far away from the axis of the rotor core, and the smaller the width of the magnetic bridge is, the better the magnetic isolation effect is, namely the less the magnetic leakage is, so that the magnetic leakage problem of the rotor magnetic bridge is effectively reduced. Therefore, the rotor of the synchronous reluctance motor of the embodiment can improve the torque output capacity of the synchronous reluctance motor while ensuring the corresponding structural strength of the rotor, and further improves the efficiency, power factor, maximum rotating speed and other performances of the synchronous reluctance motor.
(2) The rotor of synchronous reluctance motor that this application embodiment provided, D axle direction sets up the magnetic conduction passageway, has high magnetic flux in the magnetic conduction passageway, and has very high magnetic resistance in the Q axle direction of magnetic barrier central line, can increase the inductance difference in D and the Q axle direction, improves permanent magnetism auxiliary synchronous reluctance motor's torque output ability.
(3) The embodiment of the application provides a synchronous reluctance motor's rotor, rotor core is folded by a plurality of rotor punching and is pressed and form, and the rotor core processing that should set up is simple, and convenient assembling easily realizes batch production.
Drawings
Fig. 1 is a schematic structural diagram of a rotor of a synchronous reluctance motor according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a magnetic barrier group in a rotor of a synchronous reluctance motor according to an embodiment of the present invention.
Detailed Description
For a further understanding of the present invention, reference will now be made in detail to the embodiments illustrated in the drawings.
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The terms first, second, and the like in the present invention are provided for convenience of describing the technical solution of the present invention, and have no specific limiting effect, but are all generic terms, and do not limit the technical solution of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solutions in the same embodiment and the technical solutions in different embodiments can be arranged and combined to form a new technical solution without contradiction or conflict, and the technical solutions are within the scope of the present invention.
Example 1
With reference to fig. 1-2, the present embodiment provides a rotor of a synchronous reluctance machine, including: rotor core 1, rotor core 1 is equipped with a plurality of magnetic barriers group 2 along circumference, and magnetic barriers group 2 includes a plurality of magnetic barriers along radial interval arrangement, and the both ends of magnetic barrier all are equipped with magnetic bridge 3, and the magnetic bridge 3 width of every magnetic barrier is inequality in same magnetic barriers group 2, and the magnetic bridge 3 width of the magnetic barrier nearest from rotor core 1 axle center is the biggest.
According to the mutual coupling relationship of the stress between the magnetic bridges 3 and the analysis result of the stress, namely, the centrifugal force generated by the rotation of the rotor is borne by the magnetic bridges 3, the centrifugal force borne by the magnetic bridge close to the magnetic barrier nearest to the rotor core is larger, the structural strength of the rotor is greatly influenced, and in the embodiment, by adjusting the width of each magnetic barrier in each magnetic barrier group 2, compared with the traditional rotor of the synchronous reluctance motor with the same width of the magnetic bridge 3 of each magnetic barrier in the same magnetic barrier group 2, the width of the magnetic bridge 3 of each magnetic barrier in the same magnetic barrier group 2 is different, and the width of the magnetic bridge 3 of the magnetic barrier closest to the axis of the rotor iron core 1 (namely the magnetic barrier close to the D axis) is the largest, the arrangement enables the width of the magnetic bridge 3 of the magnetic barrier close to the position of the rotor core 1 closest to the axis to be stressed most to be increased, thereby ensuring the structural strength of the rotor; keep away from rotor core 1 axle center, the width of the less local magnetic bridge 3 of atress reduces correspondingly, because the width of magnetic bridge 3 is less, it is better to separate the magnetism effect, and the magnetic leakage is less promptly, so the effectual magnetic leakage problem that reduces rotor magnetic bridge 3. Therefore, the rotor of the synchronous reluctance motor of the embodiment can improve the torque output capacity of the synchronous reluctance motor while ensuring the corresponding structural strength of the rotor, and further improves the efficiency, power factor, maximum rotating speed and other performances of the synchronous reluctance motor.
In the practical application, 3 width of the magnetic bridge of every magnetic barrier are inequality in same magnetic barrier group 2, and are not linear relation, and this setting is compared in the setting of 3 width of magnetic bridge that are linear relation, and the influence on the whole rotor structure stress of fully complete consideration combines the stress analysis result for the rotor can improve synchronous reluctance motor's torque output ability when guaranteeing the corresponding structural strength of rotor.
Example 2
With reference to fig. 1-2, compared with the technical solution of embodiment 1, the rotor of the synchronous reluctance motor of the present embodiment may be improved as follows: rotor core 1 is equipped with 4 magnetic barriers group 2 along circumference, and every magnetic barrier group 2 includes 5 magnetic barriers along radial interval arrangement, and the both ends of every magnetic barrier all are equipped with magnetic bridge 3, and on rotor core 1's radial direction, outwards be first magnetic barrier 6 respectively from inside to outside in proper order, second magnetic barrier 7, third magnetic barrier 8, fourth magnetic barrier 9 and fifth magnetic barrier 10, correspond magnetic bridge 3 and be first magnetic bridge, second magnetic bridge, third magnetic bridge, fourth magnetic bridge and fifth magnetic bridge in proper order.
In practical application, the width of the magnetic bridge 3 refers to the distance from the edge of the magnetic barrier to the edge of the rotor. As shown in fig. 2, the magnetic bridge widths of the first magnetic bridge, the second magnetic bridge, the third magnetic bridge, the fourth magnetic bridge and the fifth magnetic bridge are sequentially represented by R1, R2, R3, R4, R1 and R5. In order to prove that the rotor of the synchronous reluctance motor provided by the embodiment can improve the effect of the torque output capability of the synchronous reluctance motor, the applicant respectively uses the rotor of the conventional synchronous reluctance motor and the rotor of the synchronous reluctance motor in the embodiment of the present application as a comparative example and an embodiment to perform comparative analysis on output torque, and the difference is that in the rotor of the conventional synchronous reluctance motor, the width of the magnetic bridge 3 of each magnetic barrier in the same magnetic barrier group 2 is the same, while in the rotor of the synchronous reluctance motor in the embodiment of the present application, the width of the magnetic bridge 3 of each magnetic barrier in the same magnetic barrier group 2 is different, and the width of the magnetic bridge 3 of the magnetic barrier closest to the axis of the rotor core 1 is the largest.
As shown in table 1, in the magnetic barriers in the same magnetic barrier group 2, when only the width of the magnetic bridge 3 is changed and the input current is the same, compared with the rotor of the synchronous reluctance motor in which the width of the magnetic bridge 3 of each magnetic barrier in the same magnetic barrier group 2 is the same, the rotor of the synchronous reluctance motor in this embodiment leaks less magnetic flux and has stronger torque output capability; under the condition of the same loss, the output power is higher, and therefore the efficiency is higher. Meanwhile, the stress of each magnetic bridge 3 is more uniform, and the requirement of the structural strength of the rotor is met.
TABLE 1 comparison of magnetic bridge width and output torque of each magnetic barrier in the magnetic barrier group in the comparative example and the example of the present application
Example 3
With reference to fig. 1-2, compared with the technical solution of embodiment 1, the rotor of the synchronous reluctance motor of the present embodiment may be improved as follows: and a magnetic conduction channel 4 is arranged between the adjacent magnetic barriers. Set up magnetic conduction passageway 4, the D axle direction that magnetic conduction passageway 4 belonged to has the magnetic resistance little, has high magnetic flux in the magnetic conduction passageway 4, and has very high magnetic resistance in the Q axle direction of being in the magnetic barrier central line, can increase the inductance difference in D and Q axle direction, improves permanent magnetism auxiliary synchronous reluctance motor's torque output ability.
Example 4
Compared with the technical scheme of the embodiment 1, the rotor of the synchronous reluctance motor of the embodiment can be improved as follows: the rotor core 1 is formed by laminating a plurality of rotor punching sheets. The rotor core 1 is simple to process, convenient to assemble and easy to realize batch production.
Example 5
Compared with the technical scheme of the embodiment 4, the rotor of the synchronous reluctance motor of the embodiment can be improved as follows: the rotor punching sheet is a silicon steel sheet. Because the silicon steel sheet has the characteristic of high magnetic permeability, the torque density of the motor can be improved.
Example 6
Compared with the technical scheme of the embodiment 1, the rotor of the synchronous reluctance motor of the embodiment can be improved as follows: the magnetic barrier is U-shaped. The U-shaped magnetic barrier has a high torque density.
Example 7
Compared with the technical scheme of the embodiment 1, the rotor of the synchronous reluctance motor of the embodiment can be improved as follows: the magnetic barrier is arc-shaped. The arc-shaped magnetic barrier is convenient to process, uniform in magnetic flux distribution and high in torque density.
Example 8
Compared with the technical scheme of the embodiment 1, the rotor of the synchronous reluctance motor of the embodiment can be improved as follows: the width of each magnetic barrier is the same. The width of each magnetic barrier is the same, so that the magnetic moment distribution in the magnetic barriers is uniform, low torque pulsation can be obtained, and the mechanical strength requirement of the rotor can be met.
Example 9
Compared with the technical scheme of the embodiment 1, the rotor of the synchronous reluctance motor of the embodiment can be improved as follows: the magnetic barrier is an air magnetic barrier. The air magnetic barrier is arranged, so that a certain magnetic isolation effect can be achieved, and the cost is low.
Example 10
The present embodiment provides a motor, including: a rotor and a stator for a synchronous reluctance machine according to any one of embodiments 1 to 9. The motor manufactured by the rotor of the synchronous reluctance motor has high torque output capacity, and can improve the performances of the synchronous reluctance motor, such as efficiency, power factor, maximum rotating speed and the like.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the utility model, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the utility model.
Claims (10)
1. A rotor of a synchronous reluctance machine, comprising: the rotor core, rotor core is equipped with a plurality of magnetic barriers group along circumference, and magnetic barriers group includes a plurality of magnetic barriers of radially arranging along the interval, and the both ends of magnetic barrier all are equipped with the magnetic bridge, and the magnetic bridge width of every magnetic barrier is inequality in the same magnetic barrier group, and the magnetic bridge width of the magnetic barrier nearest from rotor core axle center is the biggest.
2. The rotor of a synchronous reluctance motor as claimed in claim 1, wherein the rotor core is provided with 4 magnetic barrier groups along the circumferential direction, each magnetic barrier group comprises 5 magnetic barriers arranged at intervals along the radial direction, both ends of each magnetic barrier are provided with magnetic bridges, the first magnetic barrier, the second magnetic barrier, the third magnetic barrier, the fourth magnetic barrier and the fifth magnetic barrier are sequentially arranged from inside to outside along the radial direction of the rotor core, and the corresponding magnetic bridge is sequentially a first magnetic bridge, a second magnetic bridge, a third magnetic bridge, a fourth magnetic bridge and a fifth magnetic bridge.
3. A rotor of a synchronous reluctance machine according to claim 1, wherein a magnetic conduction path is provided between adjacent magnetic barriers.
4. The rotor of a synchronous reluctance machine of claim 1, wherein the rotor core is formed by laminating a plurality of rotor sheets.
5. The rotor of a synchronous reluctance machine of claim 4, wherein the rotor punching is a silicon steel sheet.
6. The rotor of a synchronous reluctance machine according to claim 1, wherein the magnetic barrier has a U-shape.
7. The rotor of a synchronous reluctance machine according to claim 1, wherein the shape of the magnetic barrier is a circular arc.
8. The rotor of a synchronous reluctance machine of claim 1, wherein the width of each magnetic barrier is the same.
9. The rotor of a synchronous reluctance machine according to claim 1, wherein the magnetic barrier is an air magnetic barrier.
10. An electric machine, comprising: rotor and stator of a synchronous reluctance machine according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121859841.XU CN215646410U (en) | 2021-08-10 | 2021-08-10 | Rotor of synchronous reluctance motor and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121859841.XU CN215646410U (en) | 2021-08-10 | 2021-08-10 | Rotor of synchronous reluctance motor and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215646410U true CN215646410U (en) | 2022-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121859841.XU Active CN215646410U (en) | 2021-08-10 | 2021-08-10 | Rotor of synchronous reluctance motor and motor |
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| Country | Link |
|---|---|
| CN (1) | CN215646410U (en) |
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2021
- 2021-08-10 CN CN202121859841.XU patent/CN215646410U/en active Active
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Effective date of registration: 20220803 Address after: 310000 rooms 103 and 203, North 1st and 2nd floors, building 6, No. 8-2, 8-3 and 8-5, Keji Avenue, Yuhang street, Yuhang District, Hangzhou, Zhejiang Province Patentee after: Zhejiang Haichuan Electric Technology Co.,Ltd. Address before: 310000 room 4123, building 7, Euramerican Financial City, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: Hangzhou Shouli Electric Technology Co.,Ltd. |
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