CN218005992U - Permanent magnet auxiliary synchronous reluctance motor rotor and motor - Google Patents
Permanent magnet auxiliary synchronous reluctance motor rotor and motor Download PDFInfo
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- CN218005992U CN218005992U CN202221756432.1U CN202221756432U CN218005992U CN 218005992 U CN218005992 U CN 218005992U CN 202221756432 U CN202221756432 U CN 202221756432U CN 218005992 U CN218005992 U CN 218005992U
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Abstract
The utility model discloses a synchronous reluctance motor rotor and motor are assisted to permanent magnetism relates to motor technical field, and wherein, a synchronous reluctance motor rotor is assisted to permanent magnetism, include: the rotor core, evenly be equipped with magnetic barrier group in rotor core's the circumferential direction, magnetic barrier group is including a plurality of magnetic barriers and the permanent magnetism groove of following the radial direction interval arrangement of rotor core, the contained angle between the central line in permanent magnetism groove and the central line of adjacent magnetic barrier group is 45 degrees electric angles, be equipped with the permanent magnet in the permanent magnetism groove. Compare in traditional permanent magnetism auxiliary synchronization reluctance machine, the utility model provides a permanent magnetism auxiliary synchronization reluctance machine under same current angle, reluctance torque and permanent magnet torque all reach the maximum value, and torque density is higher, and torque output ability is higher.
Description
Technical Field
The utility model relates to the technical field of electric machines, concretely relates to synchronous reluctance motor rotor and motor are assisted to permanent magnetism.
Background
The synchronous reluctance motor is a high-efficiency synchronous motor, and compared with a permanent magnet synchronous motor, the synchronous reluctance motor does not contain a permanent magnet in the used material, so that the cost is lower and the cost performance is higher. The permanent magnet synchronous motor is a high-performance synchronous motor, but the rare earth permanent magnet material used by the permanent magnet synchronous motor is high in cost and easy to demagnetize. In view of the performance of the synchronous reluctance motor and the material cost and reliability of the permanent magnet synchronous motor, in recent years, a permanent magnet assisted synchronous reluctance motor in which a permanent magnet material is added to the magnetic barrier 2 of the synchronous reluctance motor has been widely developed. Of course, permanent magnet assisted synchronous reluctance machines still have insufficient performance relative to permanent magnet machines. A conventional permanent magnet assisted synchronous reluctance machine generally arranges permanent magnets 4 inside a magnetic barrier 2 as shown in fig. 1. The D-axis magnetic circuit where the permanent magnet is located has a large magnetic resistance due to the existence of the non-magnetic barrier, so that the loss of the magnetic potential generated by the permanent magnet on the magnetic circuit is large, and large torque is difficult to generate; meanwhile, based on an MPTA (maximum torque to current ratio control) control algorithm, current angles corresponding to the maximum torque generated by the permanent magnet and the maximum reluctance torque are inconsistent, so that the torque of the permanent magnet and the reluctance torque are difficult to maximize in the same motor, the reluctance torque and the permanent magnet torque cannot be fully utilized, and the torque output capacity of the traditional permanent magnet auxiliary synchronous reluctance motor is limited.
SUMMERY OF THE UTILITY MODEL
1. Technical problem to be solved by the utility model
Synchronous reluctance machine can't make reluctance torque and permanent-magnet torque all reach the technical problem of maximum value under same current angle to traditional permanent magnetism supplementary, the utility model provides a synchronous reluctance machine rotor and motor are assisted to permanent magnetism, it can be under same current angle, makes reluctance torque and permanent-magnet torque all reach the maximum value, improves the torque density and the torque output ability of motor.
2. Technical scheme
In order to solve the above problem, the utility model provides a technical scheme does:
a permanent magnet assisted synchronous reluctance machine rotor comprising: the rotor core, evenly be equipped with magnetic barrier group in rotor core's the circumferential direction, magnetic barrier group is including a plurality of magnetic barriers and the permanent magnetism groove of following the radial direction interval arrangement of rotor core, the contained angle between the central line in permanent magnetism groove and the central line of adjacent magnetic barrier group is 45 degrees electric angles, be equipped with the permanent magnet in the permanent magnetism groove.
As shown in fig. 1-2, the Q axis refers to the center line between adjacent magnetic barrier groups, the D axis refers to the center line of the permanent magnet slot, β is the electrical angle of the included angle between the D axis and the Q axis, and in this embodiment, the current angle is the spatial electrical angle between the stator flux linkage and the air gap magnetic field generated by the permanent magnet. The angle 360/p that each pole pair of the machine occupies on the inner circle of the stator refers to the actual spatial geometrical angle, which is called the mechanical angle, while the mechanical angle that a pole pair occupies is defined as 360 electrical degrees, since the induced potential change in the winding is 360 ° for one period. I.e. electrical angle = mechanical angle x pole pair number. Therefore, the included angle between the center line of the permanent magnet slot and the center line of the adjacent magnetic barrier group in fig. 2 is 45 degrees in electrical angle, so the corresponding mechanical angle is 22.5 degrees. As shown in fig. 1, according to the torque equation of the synchronous machine:
performing calculation, wherein T is motor torque, P is pole pair number, psi PM Is a permanent magnet flux linkage, I a Is a stator current space vector, L d D-axis inductance, L, of the stator winding q Q-axis inductance of the stator winding, and theta is a current angle; in a traditional permanent magnet auxiliary synchronous reluctance motor, an included angle between the central line of the permanent magnet slot and the central line of the adjacent magnetic barrier group is 90 electrical degrees; as can be seen from the torque characteristic curve of the conventional permanent magnet-assisted synchronous reluctance motor shown in fig. 3, the permanent magnet torque of the conventional permanent magnet-assisted synchronous reluctance motor is maximum when the current angle is 0 electrical angle, the reluctance torque is maximum when the current angle is 45 electrical angle, and the resultant torque is smaller than the sum of the maximum torque of the two. As shown in fig. 2, in this embodiment, on the basis of the conventional permanent magnet-assisted synchronous reluctance motor, an included angle between a D axis where a center line of the permanent magnet is located and a Q axis of a center line of an adjacent magnetic barrier group is 45 electrical degrees by adjusting a setting position of the permanent magnet. Fig. 4 shows a torque characteristic curve of the permanent magnet-assisted synchronous reluctance motor according to the present embodimentIt can be seen that, in the permanent magnet-assisted synchronous reluctance motor of the present embodiment, both the reluctance torque and the permanent magnet torque reach the maximum value at the same current angle, so that the resultant torque is the sum of the maximum values of the permanent magnet torque and the reluctance torque, as shown in fig. 5 and 6, the air gap flux density and the back electromotive force of the permanent magnet-assisted synchronous reluctance motor of the present embodiment are both higher than those of the conventional permanent magnet-assisted synchronous reluctance motor. Therefore, compared with the traditional permanent magnet-assisted synchronous reluctance motor, the permanent magnet-assisted synchronous reluctance motor in the embodiment has the advantages that the reluctance torque and the permanent magnet torque both reach the maximum value under the same current angle, the torque density is higher, and the torque output capacity is higher.
Optionally, the magnetic barrier is an air magnetic barrier.
Optionally, the rotor core is formed by laminating silicon steel punching sheets.
Optionally, the permanent magnet is made of a ferrite material or a neodymium iron boron material.
Optionally, the permanent magnet is linear or V-shaped.
Optionally, the magnetic barrier group includes 3 magnetic barriers arranged at intervals along the radial direction of the rotor core and 1 permanent magnetic groove, and the first magnetic barrier, the second magnetic barrier and the third magnetic barrier are arranged from inside to outside in sequence, one end of the permanent magnetic groove is located at the end of the third magnetic barrier, and the other end of the permanent magnetic groove is located at the end of the first magnetic barrier.
Optionally, the rotor further includes a rotating shaft, and the rotor core is disposed on the rotating shaft.
Optionally, the magnetic barrier is U-shaped, arc-shaped, or V-shaped.
And simultaneously, the utility model provides a motor, including the aforesaid synchronous reluctance machine rotor and stator are assisted to permanent magnetism.
Optionally, the stator includes stator core, stator core is laminated by the silicon steel punching sheet and is formed.
3. Advantageous effects
Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:
(1) The utility model provides a synchronous reluctance motor rotor is assisted to permanent magnetism, moreover, the steam generator is simple in structure, this embodiment is on traditional synchronous reluctance motor is assisted to permanent magnetism, through the setting position of adjustment permanent magnet, the D axle that makes the permanent magnet central line place is 45 electric angles with the contained angle of the central line Q axle of adjacent magnetic barrier group, this setting makes the synchronous reluctance motor is assisted to permanent magnetism of this embodiment under same current angle, reluctance torque and permanent magnet torque all reach the maximum value, make synthetic torque be permanent magnet torque and reluctance torque maximum value sum. Compared with the traditional permanent magnet auxiliary synchronous reluctance motor, the permanent magnet auxiliary synchronous reluctance motor in the embodiment has the advantages that under the same current angle, reluctance torque and permanent magnet torque reach the maximum value, the torque density is higher, and the torque output capacity is higher.
(2) According to the permanent magnet auxiliary synchronous reluctance motor rotor provided by the embodiment of the application, the permanent magnet is made of ferrite materials or neodymium iron boron materials, and the ferrite materials have the characteristics of low price and high temperature resistance; the neodymium iron boron material has the characteristic of high magnetism, and can increase the torque density of the motor.
(3) The embodiment of the application provides a permanent magnet auxiliary synchronous reluctance motor rotor, a rotor core is formed by laminating silicon steel punching sheets. The laminated silicon steel sheet has high magnetic flux rate, high structural strength and easy machining.
Drawings
Fig. 1 is a sectional view of a conventional permanent magnet assisted synchronous reluctance motor rotor.
Fig. 2 is a cross-sectional view of a permanent magnet-assisted synchronous reluctance motor rotor according to an embodiment of the present invention.
Fig. 3 is a torque characteristic diagram of a conventional permanent magnet-assisted synchronous reluctance motor.
Fig. 4 is a torque characteristic diagram of a permanent magnet-assisted synchronous reluctance motor according to an embodiment of the present invention.
Fig. 5 is a comparison curve diagram of no-load air gap flux density between a conventional permanent magnet-assisted synchronous reluctance motor rotor and a permanent magnet-assisted synchronous reluctance motor provided in an embodiment of the present invention;
fig. 6 is the supplementary synchronous reluctance motor rotor of traditional permanent magnetism and the embodiment of the utility model provides a supplementary synchronous reluctance motor's of permanent magnetism no-load back emf contrast curve.
Detailed Description
For a further understanding of the present invention, reference will be made to the drawings and examples for a detailed description of the invention.
The present application will be described in further detail with reference to the 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 invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The utility model discloses in words such as first, second, be for the description the utility model discloses a technical scheme is convenient and set up, and does not have specific limiting action, is general finger, right the technical scheme of the utility model does not constitute limiting action. 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", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific 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 "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. A plurality of technical schemes in the same embodiment and a plurality of technical schemes in different embodiments can be arranged and combined to form a new technical scheme without contradiction or conflict, which is all in the scope of the utility model.
Example 1
With reference to fig. 1 to 6, the present embodiment provides a permanent magnet assisted synchronous reluctance motor rotor, including: rotor core 1, evenly be equipped with magnetic barrier group on rotor core 1's the circumferential direction, magnetic barrier group includes a plurality of magnetic barriers 2 and the permanent magnetism groove 3 of 1 radial direction interval arrangements along rotor core, the contained angle between the central line of permanent magnetism groove 3 and the central line of adjacent magnetic barrier group is 45 degrees electric angles, be equipped with permanent magnet 4 in the permanent magnetism groove 3.
As shown in fig. 1-2, the Q axis refers to a central line between adjacent magnetic barrier groups, the D axis refers to a central line of the permanent magnet slot 3, β is an electrical angle of an included angle between the D axis and the Q axis, and in this embodiment, a current angle is a spatial electrical angle between a stator flux linkage and an air gap magnetic field generated by a permanent magnet. The angle 360/p that each pole pair of the machine occupies on the inner circle of the stator refers to the actual spatial geometrical angle, which is called the mechanical angle, while the mechanical angle that a pole pair occupies is defined as 360 electrical degrees, since the induced potential change in the winding is 360 ° for one period. I.e. electrical angle = mechanical angle x pole pair number. Therefore, the included angle between the center line of the permanent magnet slot 3 and the center line of the adjacent magnetic barrier group in fig. 2 is 45 degrees in electrical angle, so the corresponding mechanical angle is 22.5 degrees. As shown in fig. 1, according to the torque equation of the synchronous machine:
performing calculation, wherein T is motor torque, P is pole pair number, psi PM Is a permanent magnet flux linkage, I a Is a stator current space vector, L d D-axis inductance, L, of the stator winding q Q-axis inductance of the stator winding, and theta is a current angle; in a traditional permanent magnet auxiliary synchronous reluctance motor, an included angle between the central line of the permanent magnet groove 3 and the central line of the adjacent magnetic barrier group is 90 electrical degrees; as can be seen from the torque characteristic curve of the conventional permanent magnet-assisted synchronous reluctance motor shown in fig. 3, the conventional permanent magnet-assisted synchronous reluctance motorThe permanent magnet torque of the reluctance motor is maximum when the current angle is 0 electrical angle, the reluctance torque is maximum when the current angle is 45 electrical angle, and the composite torque is smaller than the sum of the maximum torque values of the two. As shown in fig. 2, in this embodiment, on the basis of the conventional permanent magnet assisted synchronous reluctance motor, by adjusting the setting position of the permanent magnet 4, the included angle between the D axis where the center line of the permanent magnet 4 is located and the Q axis of the center line of the adjacent magnetic barrier group is 45 electrical degrees. As can be seen from the torque characteristic curve of the permanent magnet-assisted synchronous reluctance motor of this embodiment shown in fig. 4, both the reluctance torque and the permanent magnet torque reach the maximum value at the same current angle, so that the resultant torque is the sum of the permanent magnet torque and the maximum value of the reluctance torque, and as shown in fig. 5 and 6, the air gap flux density and the back electromotive force of the permanent magnet-assisted synchronous reluctance motor of this embodiment are both higher than those of the conventional permanent magnet-assisted synchronous reluctance motor. Therefore, compared with the traditional permanent magnet-assisted synchronous reluctance motor, the permanent magnet-assisted synchronous reluctance motor in the embodiment has the advantages that the reluctance torque and the permanent magnet torque both reach the maximum value under the same current angle, the torque density is higher, and the torque output capacity is higher.
Example 2
Compared with the technical scheme of the embodiment 1, the permanent magnet auxiliary synchronous reluctance motor rotor of the embodiment can be improved as follows: the magnetic barrier 2 is an air magnetic barrier. The air magnetic barrier plays a certain magnetic isolation role and reduces the production cost.
Example 3
Compared with the technical scheme of the embodiment 1, the permanent magnet auxiliary synchronous reluctance motor rotor of the embodiment can be improved as follows: the rotor core 1 is formed by laminating silicon steel punching sheets. The laminated silicon steel sheet has high magnetic flux rate, high structural strength and easy machining.
Example 4
Compared with the technical scheme of the embodiment 1, the permanent magnet auxiliary synchronous reluctance motor rotor of the embodiment can be improved as follows: the permanent magnet 4 is made of ferrite materials or neodymium iron boron materials. The ferrite material has the characteristics of low price and high temperature resistance; the neodymium iron boron material has the characteristic of high magnetism, and can increase the torque density of the motor.
Example 5
Compared with the technical scheme of the embodiment 1, the permanent magnet auxiliary synchronous reluctance motor rotor of the embodiment can be improved as follows: the permanent magnet 4 is linear or V-shaped. The straight line shape facilitates the machining arrangement, and the V shape can have higher torque density.
Example 6
With reference to fig. 2, compared with the technical solution of embodiment 1, the permanent magnet assisted synchronous reluctance motor rotor of this embodiment may be improved as follows: magnetic barrier group includes 3 magnetic barriers 2 and 1 permanent magnetism groove 3 along 1 radial direction interval arrangements of rotor core, is first magnetic barrier 5, second magnetic barrier 6 and third magnetic barrier 7 from inside to outside in proper order, the one end in permanent magnetism groove 3 is located the tip of third magnetic barrier 7, the other end in permanent magnetism groove 3 is located the tip of first magnetic barrier 5. The arrangement ensures that the included angle between the central line of the permanent magnet groove 3 and the central line of the adjacent magnetic barrier group is 45 degrees in electrical angle, the corresponding mechanical angle is 22.5 degrees, and the torque density is improved.
Example 7
Compared with the technical scheme of the embodiment 1, the permanent magnet auxiliary synchronous reluctance motor rotor of the embodiment can be improved as follows: the rotor further comprises a rotating shaft, and the rotor iron core 1 is arranged on the rotating shaft.
Example 8
Compared with the technical scheme of the embodiment 1, the permanent magnet auxiliary synchronous reluctance motor rotor and the motor of the embodiment can be improved as follows: the magnetic barrier 2 is U-shaped, arc-shaped or V-shaped. The structure is convenient to process and set, and can play a certain magnetic isolation role.
Example 9
The present embodiment provides a motor, including a rotor and a stator of a permanent magnet assisted synchronous reluctance motor according to any one of embodiments 1 to 8. This motor of setting compares in traditional supplementary synchronous reluctance motor of permanent magnetism, and the supplementary synchronous reluctance motor's of permanent magnetism in this embodiment torque density is higher, and torque output ability is higher, make full use of reluctance torque and permanent magnetism torque for the utilization ratio has reached the maximize.
Example 10
Compared with the technical scheme of the embodiment 9, the permanent magnet auxiliary synchronous reluctance motor rotor and the motor of the embodiment can be improved as follows: the stator comprises a stator core, and the stator core is formed by laminating silicon steel stamped sheets. The magnetic flux sensor is formed by laminating silicon steel punching sheets, has high magnetic flux rate and high structural strength, and is convenient to process.
The present invention and its embodiments have been described above schematically, and the description is not limited thereto, 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 of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.
Claims (10)
1. A permanent magnet assisted synchronous reluctance motor rotor, comprising: the rotor core, evenly be equipped with magnetic barrier group in rotor core's the circumferential direction, magnetic barrier group is including a plurality of magnetic barriers and the permanent magnetism groove of following the radial direction interval arrangement of rotor core, the contained angle between the central line in permanent magnetism groove and the central line of adjacent magnetic barrier group is 45 degrees electric angles, be equipped with the permanent magnet in the permanent magnetism groove.
2. The permanent magnet assisted synchronous reluctance machine rotor of claim 1, wherein the magnetic barrier is an air magnetic barrier.
3. The permanent magnet assisted synchronous reluctance motor rotor of claim 1, wherein the rotor core is formed by laminating silicon steel sheets.
4. The rotor of claim 1, wherein the permanent magnet is made of ferrite material or neodymium iron boron material.
5. The permanent magnet assisted synchronous reluctance machine rotor according to claim 1, wherein the permanent magnets are shaped as a straight line or a V.
6. The rotor of claim 1, wherein the magnetic barrier group comprises 3 magnetic barriers arranged at intervals in a radial direction of the rotor core and 1 permanent magnet slot, and the first magnetic barrier, the second magnetic barrier and the third magnetic barrier are arranged in sequence from inside to outside, one end of the permanent magnet slot is located at an end of the third magnetic barrier, and the other end of the permanent magnet slot is located at an end of the first magnetic barrier.
7. The rotor of claim 1, further comprising a shaft, wherein the rotor core is disposed on the shaft.
8. The permanent magnet assisted synchronous reluctance machine rotor of claim 1, wherein the shape of the magnetic barrier is a U-shape, an arc shape or a V-shape.
9. An electrical machine comprising a permanent magnet assisted synchronous reluctance machine rotor and stator according to any of claims 1-8.
10. The electric machine of claim 9, wherein the stator comprises a stator core laminated from silicon steel laminations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221756432.1U CN218005992U (en) | 2022-07-07 | 2022-07-07 | Permanent magnet auxiliary synchronous reluctance motor rotor and motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221756432.1U CN218005992U (en) | 2022-07-07 | 2022-07-07 | Permanent magnet auxiliary synchronous reluctance motor rotor and motor |
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| CN218005992U true CN218005992U (en) | 2022-12-09 |
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| CN202221756432.1U Active CN218005992U (en) | 2022-07-07 | 2022-07-07 | Permanent magnet auxiliary synchronous reluctance motor rotor and motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116742856A (en) * | 2023-07-03 | 2023-09-12 | 山东理工大学 | Magnetic field distribution adjustable motor with arc-shaped magnetic barriers |
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2022
- 2022-07-07 CN CN202221756432.1U patent/CN218005992U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116742856A (en) * | 2023-07-03 | 2023-09-12 | 山东理工大学 | Magnetic field distribution adjustable motor with arc-shaped magnetic barriers |
| CN116742856B (en) * | 2023-07-03 | 2024-05-31 | 山东理工大学 | Magnetic field distribution adjustable motor with arc-shaped magnetic barriers |
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