CN211744167U - A Rotor Structure Based on Bidirectional Sloping Pole - Google Patents

Abstract

The utility model discloses a rotor structure based on bidirectional sloping poles, belonging to the technical field of disc permanent magnet motors. The pole arc coefficient of the S pole of the permanent magnet can effectively suppress the cogging torque of the rotor structure by using the corresponding setting of the bidirectional oblique pole and the corresponding optimization of the pole arc coefficient, and a better suppressing effect can be achieved. The rotor structure based on the bidirectional inclined pole of the utility model can effectively improve the cogging torque suppression effect of the rotor structure, improve the stability and reliability of the application of the disc permanent magnet motor, promote the application of the disc permanent magnet motor, and has the advantages of relatively high efficiency. Good application effect and promotion value.

Description

A Rotor Structure Based on Bidirectional Sloping Pole

technical field

The utility model belongs to the technical field of disk type permanent magnet motors, in particular to a rotor structure based on bidirectional inclined poles.

Background technique

In recent years, with the continuous development of the disk permanent magnet motor technology, the application of the disk permanent magnet motor has become more and more extensive. There are obvious differences between the disc permanent magnet motor and the traditional motor. This difference is mainly reflected in the difference of the rotor structure. In general, the permanent magnets of the disk permanent magnet motor have a fan-shaped structure, and the slanted pole method is different from the radial rotor of the traditional motor, which also leads to the difference between the method used by the disk permanent magnet motor to suppress the cogging torque. Traditional motors are different. At present, the method used by the disc permanent magnet motor to suppress its cogging torque is to perform slanted pole treatment on the permanent magnet. Although this method can suppress the cogging torque of the disc permanent magnet motor to a certain extent, However, the suppression effect is limited and cannot fully meet the needs of actual use, resulting in obvious limitations in the application of the disc permanent magnet motor.

SUMMARY OF THE INVENTION

Aiming at one or more of the above defects or improvement needs of the prior art, the utility model provides a rotor structure based on bidirectional inclined poles, which can effectively suppress the cogging torque of the motor and obtain better cogging rotation. Moment suppression effect.

In order to achieve the above purpose, the present invention provides a rotor structure based on bidirectional inclined poles, comprising a first permanent magnet disk, a radial rotor and a second permanent magnet disk arranged in sequence in the axial direction; wherein,

The inner peripheral surfaces of the two permanent magnet disks close to the radial rotor are respectively provided with permanent magnet magnetic poles in the circumferential direction; the permanent magnet magnetic poles on the same permanent magnet disk are respectively disposed obliquely in the same direction, and each permanent magnet The inclined pole angles of the magnetic poles of the magnets are the same; at the same time, the inclined pole directions of the oppositely arranged permanent magnet magnetic poles on the two permanent magnet disks are opposite;

The first permanent magnet disk is provided with a first S pole and a first N pole in sequence along the circumferential direction; the inner peripheral surface of the second permanent magnet disk is provided with a second S pole and a second S pole in the circumferential direction. N pole; the first S pole and the second N pole correspond in the axial direction, and the first N pole and the second S pole correspond in the axial direction; the pole arc coefficient of each S pole is the same, and each N pole The pole arc coefficients of the poles are the same, and the pole arc coefficients of the S pole and the N pole are different.

As a further improvement of the present invention, the two permanent magnet disks are respectively deflected by a certain angle in opposite directions, so that a certain deflection angle is formed between the corresponding N pole and S pole in the axial direction.

As a further improvement of the present invention, the deflection angle is 2°˜8°.

As a further improvement of the present invention, the inclined pole angle of the magnetic pole of the permanent magnet is 2-5°.

As a further improvement of the present invention, 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, the deflection angle is 4°, and the oblique pole angle is 3°.

The above improved technical features can be combined with each other as long as they do not conflict with each other.

In general, compared with the prior art, the above technical solutions conceived by the present utility model have the following beneficial effects:

(1) The rotor structure based on the bidirectional oblique pole of the present utility model, by carrying out the bidirectional oblique pole arrangement to the permanent magnet magnetic poles on the two permanent magnet disks, and preferably setting the pole arc coefficient of the permanent magnet N pole and the permanent magnet S pole, Using the corresponding setting of the bidirectional oblique pole and the corresponding optimization of the pole arc coefficient, the cogging torque of the rotor structure can be effectively suppressed, and a better suppression effect can be achieved;

(2) The rotor structure based on the bidirectional slanted pole of the present utility model, on the basis of the bidirectional slanted pole and the corresponding setting of the permanent magnet pole arc coefficient, the two permanent magnet disks are further arranged to be deflected at a certain angle, and the deflection angle is used. The parameters such as slanted pole angle and pole arc coefficient are set correspondingly at the same time, which further improves the suppression effect of the cogging torque of the rotor structure, improves the stability and reliability of the application of the disc permanent magnet motor, and promotes the application of the disc permanent magnet motor. It has good application effect and promotion value.

Description of drawings

1 is a schematic structural diagram of a rotor structure based on bidirectional inclined poles in an embodiment of the present invention;

Fig. 2 is the corresponding arrangement schematic diagram of bidirectional oblique pole in the embodiment of the present utility model;

3 is a schematic diagram of the formation of the deflection angle of the permanent magnet disk in the embodiment of the present utility model;

Fig. 4 is the schematic diagram of the inclined pole arrangement form of the permanent magnet magnetic pole in the embodiment of the present invention;

In all drawings, the same reference numerals represent the same technical features, specifically: 1. the first permanent magnet disk, 101. the first S pole, 102. the first N pole; 2. the second permanent magnet disk, 201. Second S pole, 202. Second N pole; 3. Wound stator, 4. Radial rotor.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as there is no conflict with each other.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial" The orientation or positional relationship indicated by , "radial direction", "circumferential direction", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying the indicated device. Or the elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection connected, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication between two elements or the interaction between the two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features through an intermediary indirect contact. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

Example:

The rotor structure based on bidirectional inclined poles in the preferred embodiment of the present invention is shown in FIG. 1 . The rotor structure includes a first permanent magnet disk 1 , a radial rotor 4 and a second permanent magnet disk 2 arranged in sequence in the axial direction, and a plurality of wound stators 3 are arranged on the outer circumference of the radial rotor 4 in the circumferential direction.

More specifically, permanent magnet magnetic poles, ie, the first S pole 101 and the second N pole 202 or the first N pole 102 and the second S pole 201 , are correspondingly provided on the permanent magnet disk end faces of the wound stator 3 in the axial direction. Specifically, on the inner end surface of the first permanent magnet disk 1 , the first S pole 101 and the first N pole 102 are arranged in sequence along the circumferential direction, and the first S pole 101 and the first N pole 102 are arranged in sequence at intervals. Correspondingly, a second S pole 201 and a second N pole 202 are arranged on the inner end surface of the second permanent magnet disk 2 facing the positive radial direction of the rotor 4 in sequence.

Further, in the preferred embodiment, the permanent magnet magnetic poles arranged on the two permanent magnet disks are inclined poles, and each permanent magnet magnetic pole on the same permanent magnet disk is inclined in the same direction, and the magnetic poles on the two permanent magnet disks are inclined in the same direction. poles in opposite directions. Taking the magnetic poles shown in FIG. 2 as an example, the magnetic poles on the left (the first S pole 101 and the first N pole 102 ) are inclined in a clockwise direction, while the magnetic poles on the right (the second S pole 102 ) 201 and the second N pole 202) are inclined in a counterclockwise direction.

It should be noted that the so-called oblique pole refers to the fact that the magnetic pole is rotated in the same direction (clockwise or counterclockwise) by a certain angle α on both sides relative to the standard sector magnetic pole, and the angle α can also be regarded as a permanent The angle by which the outer circumference of the magnet poles is offset relative to the inner circumference. Specifically, in a standard sector-shaped magnetic pole, the extension lines of its two sides pass through the center of the permanent magnet disk, that is, the line connecting the inner circumferential edge of the magnetic pole and the center of the disk and the line connecting the outer circumferential edge of the same side and the center of the disk are collinear, As shown in Figure 4. For the oblique pole, the line connecting the inner circumferential edge of the magnetic pole and the center of the disk is different from the line connecting the outer circumferential edge on the same side and the center of the disk, and there is a certain angle α between the two lines, that is, the extension of the side of the magnetic pole. The line is not the center of the disk.

Further, in the preferred embodiment, the inner circumference of each permanent magnet pole on the two permanent magnet disks is not completely aligned in the axial direction, it can be regarded as the inner circumference of each permanent magnet pole is axially aligned. On the basis of , the two permanent magnet disks are rotated by an angle β in the direction away from each other (one rotates clockwise and the other rotates counterclockwise), that is, when the permanent magnet poles on the two permanent magnet disks are projected onto a plane , the axially corresponding two permanent magnet poles are offset by an angle 2β, as shown in FIG. 3 .

Meanwhile, in the preferred embodiment, the pole arc coefficients of the permanent magnet N poles (the first N pole 102 and the second N pole 202 ) and the permanent magnet S poles (the first S pole 101 and the ground two S poles 201 ) are different, and The pole arc coefficients of the N poles of the two permanent magnets are the same, and the pole arc coefficients of the S poles of the two permanent magnets are the same. It should be noted that the so-called 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 and the number of permanent magnet poles set on the same permanent magnet disk. related. In the preferred embodiment, the same permanent magnet disk is provided with 12 permanent magnet poles as an example, and the average pole pitch width becomes 360°/12, that is, 30°, and in the preferred embodiment, two adjacent permanent magnets are arranged. The pole arc widths of the magnetic poles are 26.7° and 28.2°, respectively, that is, the pole arc coefficients of the two permanent magnet poles are 0.89 and 0.94. Under the combination of the above-mentioned pole arc coefficients, the obtained rotor structure can effectively suppress the cogging torque.

Further, through simulation verification, it is found that when the pole arc coefficients of the two adjacent permanent magnet poles are 0.85-0.92 and 0.92-0.96, respectively, the obtained rotor structure can achieve a better effect of suppressing cogging torque. At the same time, the magnetic pole of the permanent magnet with a large pole arc coefficient can be an S pole or an N pole, which can be preferably set according to actual needs. Further preferably, in actual setting, the inclined pole angle α of each permanent magnet pole may preferably be 2 to 5°, for example, 3° as shown in the preferred embodiment; at the same time, the deflection angle 2β between the two permanent magnet disks It may be preferably 2×(1˜4°), for example, 2×2°=4°. Through the corresponding setting of the oblique pole angle α and the permanent magnet disk deflection angle 2β in the rotor structure, the cogging torque of the rotor structure can be effectively suppressed.

The rotor structure based on bidirectional sloping poles in the present invention is set by bidirectional sloping poles on the permanent magnet magnetic poles on the two permanent magnet discs, and the pole arc coefficients of the N poles of the permanent magnets and the S poles of the permanent magnets are preferably set, and the preferred setting The deflection angle between the two permanent magnet disks can effectively suppress the cogging torque of the rotor structure, achieve a better suppression effect, improve the stability and reliability of the disk permanent magnet motor application, and promote the disk permanent magnet motor. It has good application effect and promotion value.

Those skilled in the art can easily understand that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and replacements made within the spirit and principles of the present invention Improvements, etc., should be included within the protection scope of the present invention.

Claims (6)

1. a rotor structure based on bidirectional oblique pole, comprising the first permanent magnet disk, radial rotor and the second permanent magnet disk arranged in turn in the axial direction; it is characterized in that, The inner peripheral surfaces of the two permanent magnet disks close to the radial rotor are respectively provided with permanent magnet magnetic poles in the circumferential direction; the permanent magnet magnetic poles on the same permanent magnet disk are respectively disposed obliquely in the same direction, and each permanent magnet The inclined pole angles of the magnetic poles of the magnets are the same; at the same time, the inclined pole directions of the oppositely arranged permanent magnet magnetic poles on the two permanent magnet disks are opposite; The first permanent magnet disk is provided with a first S pole and a first N pole in sequence along the circumferential direction; the inner peripheral surface of the second permanent magnet disk is provided with a second S pole and a second S pole in the circumferential direction. N pole; the first S pole and the second N pole correspond in the axial direction, and the first N pole and the second S pole correspond in the axial direction; the pole arc coefficient of each S pole is the same, and each N pole The pole arc coefficients of the poles are the same, and the pole arc coefficients of the S pole and the N pole are different. 2 . The rotor structure based on bidirectional slanted poles according to claim 1 , wherein the two permanent magnet disks are respectively deflected by a certain angle in opposite directions, so that a certain deflection is formed between the corresponding N pole and S pole in the axial direction. 3 . angle. 3 . The rotor structure based on bidirectional slanted poles according to claim 2 , wherein the deflection angle is 2°˜8°. 4 . 4 . The rotor structure based on bidirectional slanted poles according to claim 1 , wherein the slanted pole angle of the permanent magnet magnetic poles is 2° to 5°. 5 . 5 . The rotor structure based on bidirectional slanted poles according to claim 4 , wherein the pole arc coefficients of two adjacent permanent magnet poles are in the range of 0.85-0.92 and 0.92-0.96, respectively. 6 . 6. The rotor structure based on bidirectional slanted poles according to claim 2 or 3, wherein the pole arc coefficients of two adjacent permanent magnet poles are 0.89 and 0.94 respectively, and the deflection angle is 4°, and the slanted poles The angle is 3°.

Images