CN107482812B - Rotor of electric machine - Google Patents
Rotor of electric machine Download PDFInfo
- Publication number
- CN107482812B CN107482812B CN201710939434.1A CN201710939434A CN107482812B CN 107482812 B CN107482812 B CN 107482812B CN 201710939434 A CN201710939434 A CN 201710939434A CN 107482812 B CN107482812 B CN 107482812B
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- China
- Prior art keywords
- magnetic steel
- sub
- rotor
- magnetic
- core
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a rotor of a motor, which comprises a plurality of sub-parts arranged along the axis direction, wherein one part of the sub-parts is of a magnetic steel surface-mounted structure, and the other part of the sub-parts is of a magnetic steel built-in structure. According to the rotor of the motor provided by the embodiment of the invention, the motor performance can be improved.
Description
Technical Field
The invention relates to the technical field of energy conversion, in particular to a rotor of a motor.
Background
Motors in related art are classified into surface-mount motors and interior motors according to different placement modes of permanent magnets, and interior motors are widely used in application occasions where motor output capacity needs to be improved, efficiency needs to be improved and the like due to the fact that reluctance torque can be utilized. However, because the built-in motor magnetic steel is arranged in the rotor core, the end part of the magnetic steel does not leak out of the core, so the end part leakage flux is weak, for the motor structure which uses the hall element to sense the position change of the rotor magnetic field, a hall sensing magnetic ring is generally needed to be added in the axial direction, the magnetic field direction of the magnetic ring is parallel to the axial direction of the motor, the magnetic ring is only used as the position of the hall sensing magnetic field, does not contribute to the main magnetic field of the radial motor, so the performance of the motor can not be improved, but the axial space is wasted.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present invention is to provide a rotor for an electric machine, which can improve the performance of the electric machine.
According to the rotor of the motor of the embodiment of the first aspect of the present invention, the rotor includes a plurality of sub-portions arranged along the axial direction, one part of the plurality of sub-portions is a magnetic steel surface-mounted structure, and the other part of the plurality of sub-portions is a magnetic steel built-in structure.
According to the rotor of the motor provided by the embodiment of the invention, the motor performance can be improved.
In addition, the rotor of the motor according to the above embodiment of the present invention may further have the following additional technical features:
in one embodiment of the invention, two ends of the rotor along the axial direction are in magnetic steel surface-mounted structures, and the middle of the rotor along the axial direction is in a magnetic steel built-in structure.
In one embodiment of the present invention, the magnetic steel surface-mounted structure includes a first sub-core and a first sub-magnetic steel disposed on an outer circumferential surface of the first sub-core.
In one embodiment of the present invention, the magnetic steel built-in structure includes: the second sub iron core and the second sub magnetic steel. A plurality of magnetic steel grooves arranged around the axis of the second sub iron core are formed in the second sub iron core; and the second sub-magnetic steel is filled in the magnetic steel groove.
In one embodiment of the invention, the plurality of magnetic steel slots in the second sub-core are configured to be divergent.
In one embodiment of the present invention, a position on the outer circumferential surface of the second sub-core, which is opposite to the magnetic steel groove, is recessed toward the magnetic steel groove.
According to the rotor of the motor of the embodiment of the second aspect of the present invention, the rotor includes a plurality of sub-portions arranged in the axial direction, a part of the plurality of sub-portions is an injection-molded magnetic structure, and another part of the plurality of sub-portions is a built-in structure.
In one embodiment of the present invention, the injection-molded magnetic structure includes a third sub-core and a third sub-magnetic steel injection-molded on an outer circumferential surface of the third sub-core.
In one embodiment of the present invention, the injection-molded magnetic structure is an integral disk-shaped magnetic steel structure.
According to the rotor of the motor of the embodiment of the third aspect of the present invention, both ends of the rotor in the axial direction are formed in the structure having the annular magnetic steel on the outer periphery, and the middle of the rotor in the axial direction is formed in the structure in which the magnetic steel is embedded.
Drawings
FIG. 1 is a schematic view of a rotor according to one embodiment of the present invention.
Fig. 2 is a schematic view of a magnetic steel surface-mount structure of a rotor according to an embodiment of the present invention.
Fig. 3 is a schematic view of a magnetic steel built-in structure of a rotor according to an embodiment of the present invention.
Reference numerals: the rotor comprises a rotor 1, a sub-part, a magnetic steel surface-mounted structure 11, a magnetic steel built-in structure 12, a first sub-iron core 111, a first sub-magnetic steel 112, a second sub-iron core 121, a second sub-magnetic steel 122 and an axis direction A.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 1, according to a rotor 1 of an electric machine according to an embodiment of the first aspect of the present invention, the rotor 1 includes a plurality of sub-portions arranged along an axial direction a, one of the sub-portions is a magnetic steel surface-mounted structure 11, and another of the sub-portions is a magnetic steel built-in structure 12. That is, the rotor 1 is formed by combining a magnetic steel surface-mounted structure 11 and a magnetic steel built-in structure 12.
According to the rotor 1 of the motor provided by the embodiment of the invention, the magnetic leakage can be increased through the magnetic steel surface-mounted structure 11, the structural performance of the rotor 1 is increased through the magnetic steel built-in structure 12, and the motor adopting the rotor 1 provided by the invention does not need to arrange a magnetic ring outside the rotor 1, so that the space utilization rate is improved.
In addition, the structure with built-in magnetic steel or the structure with surface-mounted magnetic steel can be used for enhancing the radial main magnetic field of the rotor 1, so that the performances of the rotor 1 and the motor with the rotor 1 can be effectively improved.
Referring to fig. 1, in an embodiment of the present invention, two ends of the rotor 1 along the axial direction a are magnetic steel surface-mounted structures 11, and the middle of the rotor 1 along the axial direction a is a magnetic steel built-in structure 12.
The magnetic steel built-in rotor 1 is used as a main magnetic field, the magnetic steel surface-mounted rotor 1 is arranged at the axial adjacent position, the magnetic steel of the magnetic steel surface-mounted rotor 1 is adhered to the outer surface of an iron core of the rotor 1, the magnetic leakage of the end part of the magnetic steel which is outwards dispersed is more, a Hall element is placed at the position close to the surface-mounted magnetic steel, and the sensed magnetic leakage strength of the end part can meet the requirement of a Hall element on an induction magnetic field.
Preferably, the two ends of the rotor 1 are magnetic steel surface-mounted structures 11, and the middle is a magnetic steel built-in structure 12. The space at two ends can be effectively utilized, and the two ends are symmetrical left and right, and the axial acting force is balanced.
Referring to fig. 2, in an embodiment of the present invention, the magnetic steel surface-mount structure 11 includes a first sub-core 111 and a first sub-magnetic steel 112 disposed on an outer circumferential surface of the first sub-core 111.
Meanwhile, the surface-mounted rotor 1 magnetic steel has a radial magnetic field, magnetic lines of force can enter a motor stator in the radial direction, and the magnetic force can be generated on the stator as well as the magnetic steel built-in rotor 1, so that the output capacity of the motor can be increased, and the axial space is effectively utilized.
Preferably, the surface-mounted permanent magnet rotor 1 structure uses annular magnetic steel, is convenient to assemble, and can easily realize uniform distribution of magnetic poles through magnetization, thereby avoiding uneven distribution of magnetic poles caused by assembly precision errors of a plurality of tile-shaped magnetic steels.
Referring to fig. 3, in one embodiment of the present invention, the magnetic steel built-in structure 12 includes: a second sub-core 121 and a second sub-magnetic steel 122. The second sub-core 121 has a plurality of magnetic steel slots therein, which are arranged around the axis of the second sub-core 121; the second sub-magnetic steel 122 is filled in the magnetic steel groove.
Further, the plurality of magnet steel slots in the second sub-core 121 are configured to be divergent.
Preferably, a position on the outer circumferential surface of the second sub-core 121 opposite to the magnetic steel groove is recessed toward the magnetic steel groove.
According to the rotor 1 of the motor of the embodiment of the second aspect of the present invention, the rotor 1 includes a plurality of sub-portions arranged in the axis direction a, a part of the plurality of sub-portions is an injection-molded magnetic structure, and another part of the plurality of sub-portions is a built-in structure.
Further, the rotor 1 arranged in the axial direction is a combination of an injection molding magnet and a magnetic steel built-in structure 12. The injection molding magnet is used without pasting magnetic steel, the structure process is further simplified, the injection molding magnet can realize uniform distribution of magnetic poles through magnetization, and the uneven distribution of the magnetic poles caused by assembly precision errors of a plurality of tile-shaped magnetic steels is avoided. In addition, the rotor 1 with the built-in magnetic steel can be placed into an injection mold, then injection molding and magnetic injection molding are carried out, axial connection of the rotors 1 with two structures is facilitated, the one-to-one corresponding positions of the magnetic poles of the two rotors 1 can be easily ensured, and errors are reduced.
In one embodiment of the present invention, the injection-molded magnetic structure includes a third sub-core and a third sub-magnetic steel injection-molded on an outer circumferential surface of the third sub-core. The injection molding magnetic structure is a whole disc-shaped magnetic steel structure. That is to say, the injection molding magnetic mechanism can be an injection molding magnet as a whole, and can also be a structure in which magnetic steel is injected on an iron core.
According to the rotor 1 of the motor of the embodiment of the third aspect of the present invention, both ends of the rotor 1 in the axial direction a are formed in a structure having annular magnetic steel on the outer periphery, and the middle of the rotor 1 in the axial direction a is formed in a structure in which the magnetic steel is embedded.
According to the permanent magnet motor structure, the motor rotor 1 structure is the combination of a surface-mounted permanent magnet rotor 1 structure and a built-in permanent magnet rotor 1 structure. The invention can effectively utilize the internal space of the motor and improve the output capability of the motor.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. The rotor of the motor is characterized by comprising a plurality of sub-parts arranged along the axis direction, wherein one part of the plurality of sub-parts is of a magnetic steel surface-mounted structure, the other part of the plurality of sub-parts is of a magnetic steel built-in structure, the magnetic steel surface-mounted structure comprises a first sub-iron core and first sub-magnetic steel arranged on the outer peripheral surface of the first sub-iron core, the surface-mounted rotor magnetic steel is provided with a radial magnetic field, and the first sub-magnetic steel is annular magnetic steel.
2. The rotor of an electric machine according to claim 1, wherein both ends of the rotor in the axial direction are magnetic steel surface-mounted structures, and the middle of the rotor in the axial direction is a magnetic steel built-in structure.
3. The rotor of an electric machine of claim 1, wherein the magnetic steel built-in structure comprises:
the second sub iron core is internally provided with a plurality of magnetic steel grooves arranged around the axis of the second sub iron core;
and the second sub-magnetic steel is filled in the magnetic steel groove.
4. The rotor of an electric machine of claim 3, wherein the plurality of magnetic steel slots in the second sub-core are configured to diverge.
5. The rotor of an electric motor according to claim 3, wherein a position on the outer circumferential surface of the second sub-core opposite to the magnetic steel slot is recessed toward the magnetic steel slot.
6. The rotor of an electric machine of claim 1, wherein a portion of the plurality of sub-portions is of an injection molded magnetic construction and another portion of the plurality of sub-portions is of a built-in construction.
7. The rotor of an electric machine according to claim 6, wherein the injection-molded magnetic structure comprises a third sub-core and a third sub-magnetic steel injection-molded on an outer circumferential surface of the third sub-core.
8. The rotor of an electric machine of claim 6, wherein the injection molded magnetic structure is a unitary disc-shaped magnetic steel structure.
9. The rotor of an electric motor according to claim 1, wherein both ends of the rotor in the axial direction are formed in a structure having annular magnetic steel on the outer periphery thereof, and the middle of the rotor in the axial direction is formed in a structure having magnetic steel embedded therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710939434.1A CN107482812B (en) | 2017-09-30 | 2017-09-30 | Rotor of electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710939434.1A CN107482812B (en) | 2017-09-30 | 2017-09-30 | Rotor of electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107482812A CN107482812A (en) | 2017-12-15 |
| CN107482812B true CN107482812B (en) | 2020-07-10 |
Family
ID=60606309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710939434.1A Active CN107482812B (en) | 2017-09-30 | 2017-09-30 | Rotor of electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107482812B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217503A (en) * | 2018-11-21 | 2019-01-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator core, stator module, motor, compressor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008017645A (en) * | 2006-07-07 | 2008-01-24 | Matsushita Electric Ind Co Ltd | Permanent magnet embedded motor |
| US8084911B2 (en) * | 2008-10-16 | 2011-12-27 | Asmo Co., Ltd. | Motor |
| DE102010041015A1 (en) * | 2010-09-20 | 2012-03-22 | Robert Bosch Gmbh | Machine component for an electrical machine |
| JP5863410B2 (en) * | 2011-11-16 | 2016-02-16 | 信越化学工業株式会社 | Rotor and spoke type IPM permanent magnet rotating machine |
| JP2013247783A (en) * | 2012-05-25 | 2013-12-09 | Jtekt Corp | Rotor and rotary electric machine having the same |
| CN207218402U (en) * | 2017-09-30 | 2018-04-10 | 广东威灵电机制造有限公司 | The rotor of motor |
-
2017
- 2017-09-30 CN CN201710939434.1A patent/CN107482812B/en active Active
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| Publication number | Publication date |
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| CN107482812A (en) | 2017-12-15 |
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