CN211744167U - Rotor structure based on bidirectional skewed poles - Google Patents
Rotor structure based on bidirectional skewed poles Download PDFInfo
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- CN211744167U CN211744167U CN202020424853.9U CN202020424853U CN211744167U CN 211744167 U CN211744167 U CN 211744167U CN 202020424853 U CN202020424853 U CN 202020424853U CN 211744167 U CN211744167 U CN 211744167U
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 claims 1
- 230000001629 suppression Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 230000007480 spreading Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses a rotor structure based on bidirectional skewed pole belongs to disc permanent magnet motor technical field, and it carries out bidirectional skewed pole setting through the permanent magnet magnetic pole to on two permanent magnet dishes to the preferred polar arc coefficient that sets up permanent magnet N utmost point, permanent magnet S utmost point utilizes the corresponding setting of bidirectional skewed pole, and the corresponding of polar arc coefficient is preferred, can effectively realize the suppression of rotor structure tooth' S socket torque, gains better suppression effect. The utility model discloses a rotor structure based on bidirectional skewed pole can effectively promote the suppression effect of rotor structure tooth's socket torque, promotes stability and reliability that disk permanent magnet motor used, promotes disk permanent magnet motor's application, has better application effect and spreading value.
Description
Technical Field
The utility model belongs to the technical field of disk permanent magnet motor, concretely relates to rotor structure based on bidirectional skewed pole.
Background
In recent years, with the continuous development of the technology of the disc type permanent magnet motor, the application of the disc type permanent magnet motor is more and more extensive. The disc type permanent magnet motor has obvious difference with the traditional motor, and the difference is mainly reflected in the difference of the rotor structure. In general, the permanent magnet of a disc type permanent magnet motor has a fan-shaped structure, and the oblique pole mode of the permanent magnet is different from that of a radial rotor of a conventional motor, which also causes the method adopted by the disc type permanent magnet motor in the process of suppressing the cogging torque to be different from that of the conventional motor. At present, the method adopted by a disc type permanent magnet motor for inhibiting the cogging torque of the disc type permanent magnet motor is to perform oblique processing on a permanent magnet, although the method can inhibit the cogging torque of the disc type permanent magnet motor to a certain extent, the inhibition effect is limited, the actual use requirement cannot be fully met, and the application of the disc type permanent magnet motor has obvious limitation.
Disclosure of Invention
To prior art's above defect or improve in the demand one or more, the utility model provides a rotor structure based on bidirectional skewed pole can effectively restrain the tooth's socket torque of motor, obtains better tooth's socket torque suppression effect.
In order to achieve the above object, the present invention provides a rotor structure based on bidirectional skewed poles, which comprises a first permanent magnet disc, a radial rotor and a second permanent magnet disc, which are axially and sequentially arranged; wherein,
permanent magnet magnetic poles are respectively arranged on the circumferential surfaces of the two permanent magnet discs close to the inner sides of the radial rotors along the annular direction; all the permanent magnet magnetic poles on the same permanent magnet disc are respectively processed in a pole-slanting way along the same direction, and the pole-slanting angles of all the permanent magnet magnetic poles are the same; meanwhile, the directions of the oblique poles of the permanent magnet magnetic poles oppositely arranged on the two permanent magnet discs are opposite;
the first permanent magnet disc is sequentially provided with a first S pole and a first N pole at intervals along the circumferential direction; a second S pole and a second N pole are sequentially arranged on the circumferential surface of the inner side of the second permanent magnet disc at intervals along the circumferential direction; the first S pole and the second N pole correspond to each other in the axial direction, and the first N pole and the second S pole correspond to each other in the axial direction; the polar arc coefficients of the S poles are the same, the polar arc coefficients of the N poles are the same, and the polar arc coefficients of the S poles are different from those of the N poles.
As a further improvement of the present invention, two the permanent magnet plate deflects a certain angle in the opposite direction respectively, so that a certain deflection angle is formed between the N pole and the S pole corresponding to the axial direction.
As a further improvement of the utility model, the deflection angle is 2 degrees to 8 degrees.
As a further improvement, the oblique polar angle of the permanent magnet magnetic pole is 2 ~ 5.
As a further improvement, the range of the pole arc coefficients of the two adjacent permanent magnet poles is 0.85-0.92 and 0.92-0.96 respectively.
As a further improvement of the present invention, the pole arc coefficients of the two adjacent permanent magnet poles are 0.89 and 0.94, respectively, and the deflection angle is 4 °, the oblique pole angle is 3 °.
The above-described improved technical features may be combined with each other as long as they do not conflict with each other.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect:
(1) the utility model discloses a rotor structure based on bidirectional skewed pole, it is through carrying out bidirectional skewed pole setting to the permanent magnet magnetic pole on two permanent magnet dishes to preferably set up the polar arc coefficient of permanent magnet N utmost point, permanent magnet S utmost point, utilize the corresponding setting of bidirectional skewed pole, and the corresponding of polar arc coefficient is preferred, can effectively realize the suppression of rotor structure tooth' S socket torque, gain better suppression effect;
(2) the utility model discloses a rotor structure based on bidirectional skewed pole, it is on bidirectional skewed pole sets up the basis of permanent magnet magnetic pole polar arc coefficient with corresponding, further set up two permanent magnet dishes into the form of certain angle of deflection, utilize deflection angle, correspond the setting when the polar arc coefficient isoparametric of skewed pole angle and polar arc coefficient, further promote the suppression effect of rotor structure tooth's socket torque, promote stability and reliability that disk permanent magnet motor used, promote the application of disk permanent magnet motor, better application effect and spreading value have.
Drawings
Fig. 1 is a schematic structural diagram of a rotor structure based on bidirectional skewed poles in an embodiment of the present invention;
fig. 2 is a schematic diagram of the corresponding arrangement of the bidirectional skewed poles in the embodiment of the present invention;
fig. 3 is a schematic diagram illustrating the formation of the deflection angle of the permanent magnet disc according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the arrangement of the oblique poles of the permanent magnet poles in the embodiment of the present invention;
in all the figures, the same reference numerals denote the same features, in particular: 1. a first permanent magnet disc, 101, a first S pole, 102, a first N pole; 2. a second permanent magnet disc, 201, a second S pole, 202, a second N pole; 3. and 4, a wound stator and a radial rotor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Example (b):
the structure of the rotor based on bidirectional skewed poles in the preferred embodiment of the present invention is shown in fig. 1. Wherein, rotor structure includes that the axial sets gradually first permanent magnet dish 1, radial rotor 4 and second permanent magnet dish 2, and the periphery of radial rotor 4 is provided with a plurality of wire winding stators 3 along the hoop.
More specifically, permanent magnet poles, namely a first S pole 101, a second N pole 202, or a first N pole 102, a second S pole 201, are correspondingly disposed on the permanent magnet disc end faces at the two axial ends of the wound stator 3. Specifically, a first S pole 101 and a first N pole 102 are sequentially disposed in a circumferential direction on an inner end surface of the first permanent magnet disk 1, and the first S pole 101 and the first N pole 102 are sequentially disposed at an interval. Correspondingly, the second permanent magnet disk 2 is provided with a second S pole 201 and a second N pole 202 at intervals in sequence on the inner side end surface of the aligned radial rotor 4.
Further, in a preferred embodiment, the permanent magnet poles arranged on the two permanent magnet disks are all slant poles, and each permanent magnet pole on the same permanent magnet disk is slant to the same direction, and the poles on the two permanent magnet disks are opposite poles. Taking the magnetic poles shown in fig. 2 as an example, the magnetic poles on the left side (first S pole 101, first N pole 102) are all poled in the clockwise direction, and the magnetic poles on the right side (second S pole 201, second N pole 202) are all poled in the counterclockwise direction.
The term "oblique pole" means that the magnetic pole is rotated in the same direction (clockwise or counterclockwise) by a predetermined angle α with respect to the standard fan-shaped magnetic pole, and the angle α can be regarded as an angle at which the outer circumference of the permanent magnet magnetic pole is offset from the inner circumference. Specifically, in the standard sector magnetic pole, the extension lines of the two sides of the standard sector magnetic pole pass through the center of the permanent magnet disk, i.e., the connecting line of the inner circumferential edge of the magnetic pole and the center of the disk is collinear with the connecting line of the outer circumferential edge of the same side and the center of the disk, as shown in fig. 4. For the oblique pole, the connecting line of the inner circumference edge of the magnetic pole and the center of the magnetic disk and the connecting line of the outer circumference edge of the same side and the center of the magnetic disk are different, and a certain included angle alpha is formed between the two lines, namely the extension line of the side edge of the magnetic pole is not beyond the center of the magnetic disk.
Further, in a preferred embodiment, the inner circumferences of the permanent magnet poles on the two permanent magnet discs are not completely aligned in the axial direction, which can be regarded as that the two permanent magnet discs are respectively rotated by an angle β in directions (one rotating clockwise and the other rotating counterclockwise) away from each other on the basis that the inner circumferences of the permanent magnet poles are aligned in the axial direction, that is, when the permanent magnet poles on the two permanent magnet discs are projected onto a plane, the two permanent magnet poles corresponding to the axial direction are offset by an angle 2 β, as shown in fig. 3.
Meanwhile, in the preferred embodiment, the pole arc coefficients of the permanent magnet N pole (the first N pole 102, the second N pole 202) and the permanent magnet S pole (the first S pole 101, the second S pole 201) are different, while the pole arc coefficients of the two permanent magnet N poles are the same and the pole arc coefficients of the two permanent magnet S poles are the same. It should be noted that the pole arc coefficient here refers to the ratio of the pole arc width of the corresponding permanent magnet pole to the average pole pitch width, and the average pole pitch width is related to the number of permanent magnet poles arranged on the same permanent magnet disc. In the preferred embodiment, in the case of 12 permanent magnet poles arranged on the same permanent magnet disc, the average pole pitch width becomes 360 °/12, i.e., 30 °, while in the preferred embodiment, the pole arc widths of two permanent magnet poles arranged adjacently are 26.7 ° and 28.2 °, respectively, i.e., the pole arc coefficients of the two permanent magnet poles are 0.89 and 0.94. Under the combination of the pole arc coefficients, the obtained rotor structure can effectively inhibit the cogging torque.
Furthermore, after simulation verification, the obtained rotor structure can obtain a better effect of inhibiting the cogging torque when the pole arc coefficients of two adjacent permanent magnet poles are 0.85-0.92 and 0.92-0.96 respectively. Meanwhile, the permanent magnet magnetic pole with large pole arc coefficient can be an S pole or an N pole, and the permanent magnet magnetic pole can be preferably arranged according to actual needs. Further preferably, in actual arrangement, the oblique angle α of each permanent magnet pole may be preferably 2-5 °, for example, 3 ° as shown in the preferred embodiment; meanwhile, the deflection angle 2 β between the two permanent magnet disks may preferably be 2 × (1 ∼ 4 °), for example, 2 × 2 ° -4 °. Through the corresponding arrangement of the oblique angle alpha and the deflection angle 2 beta of the permanent magnet disc in the rotor structure, the cogging torque of the rotor structure can be effectively inhibited.
The utility model provides a rotor structure based on bidirectional skewed pole carries out bidirectional skewed pole setting through the permanent magnet magnetic pole to on two permanent magnet dishes to the preferred polar arc coefficient that sets up permanent magnet N utmost point, permanent magnet S utmost point, and the preferred deflection angle that sets up between two permanent magnet dishes, can effectively realize the suppression of rotor structure tooth' S socket torque, gain better suppression effect, promote stability and the reliability that disk permanent magnet motor used, promote the application of disk permanent magnet motor, better application effect and spreading value have.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A rotor structure based on bidirectional skewed poles comprises a first permanent magnet disc, a radial rotor and a second permanent magnet disc which are sequentially arranged in the axial direction; it is characterized in that the preparation method is characterized in that,
permanent magnet magnetic poles are respectively arranged on the circumferential surfaces of the two permanent magnet discs close to the inner sides of the radial rotors along the annular direction; all the permanent magnet magnetic poles on the same permanent magnet disc are respectively processed in a pole-slanting way along the same direction, and the pole-slanting angles of all the permanent magnet magnetic poles are the same; meanwhile, the directions of the oblique poles of the permanent magnet magnetic poles oppositely arranged on the two permanent magnet discs are opposite;
the first permanent magnet disc is sequentially provided with a first S pole and a first N pole at intervals along the circumferential direction; a second S pole and a second N pole are sequentially arranged on the circumferential surface of the inner side of the second permanent magnet disc at intervals along the circumferential direction; the first S pole and the second N pole correspond to each other in the axial direction, and the first N pole and the second S pole correspond to each other in the axial direction; the polar arc coefficients of the S poles are the same, the polar arc coefficients of the N poles are the same, and the polar arc coefficients of the S poles are different from those of the N poles.
2. The bi-directionally skewed pole based rotor structure of claim 1, wherein the two permanent magnet discs are each angularly deflected in opposite directions such that an axially corresponding N-pole and S-pole are angularly deflected.
3. The bi-directionally skewed pole-based rotor structure of claim 2, wherein the yaw angle is between 2 ° and 8 °.
4. The bi-directionally skewed pole-based rotor structure as claimed in any one of claims 1-3, wherein the permanent magnet poles are skewed at a pole angle of 2-5 °.
5. The bi-directionally skewed pole-based rotor structure of claim 4, wherein the pole camber coefficients of two adjacent permanent magnet poles are in the range of 0.85-0.92 and 0.92-0.96, respectively.
6. The bi-directionally skewed pole-based rotor structure of claim 2 or 3, wherein the pole arc coefficients of two adjacent permanent magnet poles are 0.89 and 0.94, respectively, and the yaw angle is 4 ° and the skew angle is 3 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020424853.9U CN211744167U (en) | 2020-03-28 | 2020-03-28 | Rotor structure based on bidirectional skewed poles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020424853.9U CN211744167U (en) | 2020-03-28 | 2020-03-28 | Rotor structure based on bidirectional skewed poles |
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| CN211744167U true CN211744167U (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020424853.9U Expired - Fee Related CN211744167U (en) | 2020-03-28 | 2020-03-28 | Rotor structure based on bidirectional skewed poles |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113809851A (en) * | 2021-09-17 | 2021-12-17 | 南京理工大学 | Axial flux permanent magnet motor with unequal pole arc coefficients |
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2020
- 2020-03-28 CN CN202020424853.9U patent/CN211744167U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113809851A (en) * | 2021-09-17 | 2021-12-17 | 南京理工大学 | Axial flux permanent magnet motor with unequal pole arc coefficients |
| CN113809851B (en) * | 2021-09-17 | 2022-12-27 | 南京理工大学 | Axial flux permanent magnet motor with unequal pole arc coefficients |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20201023 |