CN115733265A - Rotating electrical machine - Google Patents
Rotating electrical machine Download PDFInfo
- Publication number
- CN115733265A CN115733265A CN202111014395.7A CN202111014395A CN115733265A CN 115733265 A CN115733265 A CN 115733265A CN 202111014395 A CN202111014395 A CN 202111014395A CN 115733265 A CN115733265 A CN 115733265A
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- Prior art keywords
- air gap
- barrier air
- magnetic barrier
- groove
- magnet embedded
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Abstract
The invention provides a rotating electrical machine, a rotor core and a shaft, wherein the rotor core is provided with an insertion groove and a magnetic barrier air gap which take the shaft as the center and are radial; the insertion groove comprises a magnet embedded groove and a leakage magnetic flux blocking groove, the magnet embedded groove is connected with the leakage magnetic flux blocking groove, and the leakage magnetic flux blocking groove is of a quadrilateral structure; the magnetic barrier air gap is positioned between two adjacent insertion grooves and close to the shaft, so that the phenomenon of magnetic leakage inside the motor rotor can be effectively reduced, the generation of effective magnetic flux is improved, and the torque density of the motor is increased.
Description
Technical Field
The invention mainly relates to the field of motors, in particular to a rotating motor.
Background
In the prior art, a rotating electrical machine has a plurality of radial magnet slots centered on a rotating shaft, and two adjacent magnet poles are oppositely arranged and exhibit a characteristic of concentrating magnetic flux. The structure increases the air gap flux density, simplifies the motor winding design or reduces the motor volume, but the leakage effect at the position close to the shaft is obvious, so that part of the flux provided by the magnet generates a magnetic circuit in the rotor, and the output is invalid.
Disclosure of Invention
In view of the obvious magnetic leakage effect of the built-in permanent magnet opposed-impact type rotating motor, the invention provides an effect of reducing the magnetic leakage by adjusting the shape of a magnet insertion groove and increasing a magnetic barrier air gap.
The specific scheme is as follows:
a kind of rotating electrical machines, rotor core 9 and axle 8, there are insertion grooves 3 and magnetic barrier air gaps 4 that take axle 8 as the centre and take the form of radialization on the said rotor core 9;
the insertion groove 3 comprises a magnet embedded groove 5 and a leakage magnetic flux blocking groove 6, the magnet embedded groove 5 is connected with the leakage magnetic flux blocking groove 6, and the leakage magnetic flux blocking groove 6 is of a quadrilateral structure;
the magnetic barrier air gap 4 is located between two adjacent insertion slots 3 near the shaft 8.
Preferably, the magnetic barrier air gap 4 is in a hexagonal or above polygonal structure.
Preferably, the magnetic barrier air gap 4 is of a hexagonal structure, and the distance between the edges of the two sides of the magnetic barrier air gap 4 and the magnet embedded groove 5 meets the condition: the distance is not more than the width/2 of the magnet embedded groove 5, wherein the distance between the edges of the two sides of the magnetic barrier air gap 4 and the magnet embedded groove 5 is calculated in the following way: the average of the distances between the top end of the magnetic barrier air gap 4 and the magnet embedded groove 5, the distance between the bottom end of the magnet embedded groove 5 and the magnetic barrier air gap 4, the distances between the first two distances and the trapezoidal middle bit line formed by the side edge of the magnetic barrier air gap 4 and the side edge of the magnet embedded groove 5 is the distance between the side edges of the two sides of the magnetic barrier air gap 4 and the magnet embedded groove 5.
Preferably, the edge of the magnetic barrier air gap 4 opposite to the edge on two sides is a straight line, and the other three opposite edges are convex arc-shaped lines.
Preferably, the edge of the magnetic barrier air gap 4 opposite to the edge of the two sides is a straight line, and the other three opposite edges are concave arc-shaped lines.
Preferably, in the magnetic barrier air gap 4, the joint of the adjacent edges is connected by a circular arc line.
The invention has the beneficial effects that:
the magnetic flux leakage phenomenon in the motor rotor can be effectively reduced, the generation of effective magnetic flux is improved, and the torque density of the motor is increased.
Drawings
FIG. 1 is a cross-sectional view of a rotating electrical machine according to the present invention;
FIG. 2 is an exploded view of the rotor of the present invention;
fig. 3 and 4 are insertion grooves 3 of a rotor core according to the present invention;
FIG. 4 is a diagram illustrating structural features of a magnetic barrier air gap 4 according to a first embodiment;
FIG. 5 is an illustration of three structural features of the magnetic barrier air gap 4;
fig. 6-9 show the hexagonal, convex arc, concave arc and corner arc structures of the air gap 4 of the magnetic barrier of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
As shown in fig. 1 to 9, the present invention includes:
the first embodiment is as follows:
a rotating electric machine includes:
the rotor comprises a stator 7 and a rotor 2, wherein the rotor 2 comprises a shaft 8, and the shaft 8 is a rotor rotation center;
a rotor core 9, the rotor core 9 being fixed to the shaft 8;
the magnetic flux leakage rotor comprises an insertion groove 3, wherein the insertion groove 3 is radially and uniformly distributed on a rotor core 9 by taking a shaft 8 as a center, the insertion groove 3 comprises a magnet embedded groove 5 and a magnetic flux leakage blocking groove 6, and the magnet embedded groove 5 is connected with the magnetic flux leakage blocking groove 6 and is of a quadrilateral structure;
a magnetic barrier air gap 4, the magnetic barrier air gap 4 being located between two adjacent insertion slots 3 near the shaft 8;
and magnets 10, wherein the magnets 10 are inserted into the magnet insertion grooves 5, and the magnetic poles of two adjacent magnets are opposite in direction, so that the magnetic flux on the rotor core 9 has a characteristic of concentrating magnetic flux.
Wherein, the magnet is embedded into the slot 5 and the leakage magnetic flux blocking slot 6. The length of the magnet fitting groove 5 near the bottom side of the leakage flux barrier groove 6 is defined as 5a, the width thereof is defined as 5b, the length of the leakage flux barrier groove 6 is defined as 6a, the width thereof is defined as 6b, and the condition 6b ≦ 5b is satisfied.
The magnetic barrier air gap 4 is hexagonal, and the magnetic barrier air gap 4 is characterized by comprising four structures, namely a hexagonal structure, an outward convex arc structure, an inward concave arc structure and a corner arc trimming structure for trimming arcs at corner positions.
In the hexagonal shape of the present embodiment, the edges on both sides of the magnetic barrier air gap 4 are respectively parallel to the outer edges of the adjacent magnet embedded slots 5; the convex arc is that the edge of the magnetic barrier air gap 4 opposite to the edge at two sides is a straight line, and the other three opposite edges are convex arc lines; the inward concave arc is that the edge of the magnetic barrier air gap 4 opposite to the edge at two sides is a straight line, and the other three opposite edges are inward concave arc lines; the corner arc trimming is performed in the magnetic barrier air gap 4, and the adjacent edge connecting parts are connected by arc lines.
The configuration characteristic between magnetic barrier air gap 4 and magnet embedded groove 5 satisfies [ (4 a) + (4 b) + (4 c) ]/3 ≦ 5 b)/2, 4a, 4b, 4c are trapezoidal central line distance that limit and magnetic barrier air gap 4 side, magnet embedded groove 5 side constitute that the top of magnetic barrier air gap 4 and magnet embedded groove 5, the bottom of magnet embedded groove 5 and the distance of magnetic barrier air gap 4, two preceding distances formed respectively.
Example two: the structure and the principle of the embodiment are similar to those of the first embodiment, except that:
the magnetic barrier air gap 4 is not limited to a hexagonal structure, and may be a polygonal structure with more than six sides;
in the present embodiment, the sides on both sides of the magnetic barrier air gap 4 are not parallel to the outer sides of the adjacent magnet insertion grooves 5, and as shown in fig. 5, the condition of [ (4 a) + (4 b) + (4 c) ]/3 ≦ 5 b)/2 is still satisfied.
The above-described embodiments are merely illustrative of the principles and utilities of the present patent application and are not intended to limit the present patent application. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of this patent application. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and scope of the present disclosure shall be covered by the claims of this patent application.
Claims (6)
1. The rotating motor comprises a rotor core (9) and a shaft (8), and is characterized in that the rotor core (9) is provided with an insertion groove (3) and a magnetic barrier air gap (4) which are radial by taking the shaft (8) as a center;
the insertion groove (3) comprises a magnet embedded groove (5) and a leakage magnetic flux blocking groove (6), the magnet embedded groove (5) is connected with the leakage magnetic flux blocking groove (6), and the leakage magnetic flux blocking groove (6) is of a quadrilateral structure;
the magnetic barrier air gap (4) is located between two adjacent insertion slots (3) near the shaft (8).
2. The rotating electric machine according to claim 1, characterized in that: the magnetic barrier air gap (4) is of a hexagonal or above-hexagonal polygonal structure.
3. The rotating electric machine according to claim 1, characterized in that: the magnetic barrier air gap (4) is of a hexagonal structure, and the distance between the edges of the two sides of the magnetic barrier air gap (4) and the magnet embedded groove (5) meets the condition that: the distance is not more than the width/(2) of the magnet embedded groove (5), wherein the distance between the edges of the two sides of the magnetic barrier air gap (4) and the magnet embedded groove (5) is calculated in the following way: the distance between the top end of the magnetic barrier air gap (4) and the magnet embedded groove (5), the distance between the bottom end of the magnet embedded groove (5) and the magnetic barrier air gap (4), the distance between the first two distances and the trapezoidal median line distance of the trapezoid formed by the side edge of the magnetic barrier air gap (4) and the side edge of the magnet embedded groove (5), and the average of the three distances is the distance between the edges on the two sides of the magnetic barrier air gap (4) and the magnet embedded groove (5).
4. The rotating electric machine according to claim 3, characterized in that: the edge of the magnetic barrier air gap (4) opposite to the edge at two sides is a straight line, and the other three opposite edges are convex arc molded lines.
5. The rotating electric machine according to claim 3, characterized in that: the edge of the magnetic barrier air gap (4) opposite to the edge of the two sides is a straight line, and the other three opposite edges are concave arc molded lines.
6. The rotating electric machine according to claim 3, characterized in that: in the magnetic barrier air gap (4), the adjacent edge joints are connected by circular arcs.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111014395.7A CN115733265A (en) | 2021-08-31 | 2021-08-31 | Rotating electrical machine |
| TW110214545U TWM628052U (en) | 2021-08-31 | 2021-12-07 | Rotor structure of rotating motor |
| TW110145588A TWI825519B (en) | 2021-08-31 | 2021-12-07 | Rotor structure of rotating motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111014395.7A CN115733265A (en) | 2021-08-31 | 2021-08-31 | Rotating electrical machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115733265A true CN115733265A (en) | 2023-03-03 |
Family
ID=83063219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111014395.7A Pending CN115733265A (en) | 2021-08-31 | 2021-08-31 | Rotating electrical machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115733265A (en) |
| TW (2) | TWM628052U (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130043754A1 (en) * | 2011-08-19 | 2013-02-21 | Delta Electronics (Shanghai) Co., Ltd. | Rotor and rotary electric machine containing the same |
| JP5594492B2 (en) * | 2012-10-22 | 2014-09-24 | 株式会社安川電機 | Rotating electric machine |
| TWM510570U (en) * | 2015-04-28 | 2015-10-11 | Teco Elec & Machinery Co Ltd | Staggered type rotor and staggered type rotor magnet positioning ring thereof |
| US10523072B2 (en) * | 2016-06-15 | 2019-12-31 | Ford Global Technologies, Llc | Electric machine rotor |
| CN210806877U (en) * | 2019-06-11 | 2020-06-19 | 无锡东精电微电机有限公司 | Built-in permanent magnet opposite-impact type motor rotor magnetic leakage reducing structure |
| US20200395796A1 (en) * | 2019-06-17 | 2020-12-17 | Komotek Co., Ltd. | Rotor for Motor for Reducing Amount of Usage of Permanent Magnets |
-
2021
- 2021-08-31 CN CN202111014395.7A patent/CN115733265A/en active Pending
- 2021-12-07 TW TW110214545U patent/TWM628052U/en unknown
- 2021-12-07 TW TW110145588A patent/TWI825519B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| TWI825519B (en) | 2023-12-11 |
| TWM628052U (en) | 2022-06-11 |
| TW202312629A (en) | 2023-03-16 |
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