CN111668951A - Be used for Pocket type rotor core structure - Google Patents
Be used for Pocket type rotor core structure Download PDFInfo
- Publication number
- CN111668951A CN111668951A CN202010403931.1A CN202010403931A CN111668951A CN 111668951 A CN111668951 A CN 111668951A CN 202010403931 A CN202010403931 A CN 202010403931A CN 111668951 A CN111668951 A CN 111668951A
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- Prior art keywords
- magnetic
- magnetizer
- conductive sheet
- type rotor
- magnetic conductive
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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
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
Abstract
The invention discloses a core structure for a Pocket type rotor, which comprises a core body, wherein a plurality of magnetic steel grooves are radially formed in the core body and used for mounting permanent magnets; a magnetizer is formed between every two magnetic steel slots and comprises a first magnetizer and a second magnetizer, a plurality of magnetism-resisting slots are formed in the second magnetizer, and a plurality of first magnetizers and a plurality of second magnetizers are stacked in a staggered manner to form a magnetizer; the invention reduces the magnetic leakage coefficient of the motor iron core body, improves the utilization rate of energy sources, and avoids the motor from being damaged by heating; meanwhile, the irreversible high-temperature loss of magnetism of the permanent magnet in the rotor body of the motor caused by overhigh temperature of the motor is avoided, and the working performance of the motor is influenced.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a core structure of a Pocket type rotor.
Background
Permanent-magnet machine's rotor comprises pivot, rotor core, permanent magnet and additional support, and the magnetic steel groove is generally seted up to current permanent-magnet machine's rotor core on iron core body, inlays the permanent magnet in the magnetic steel groove, produces magnetic field through the permanent magnet, makes the rotor rotate through electromagnetic induction, but as long as magnetic field exists will have the magnetic leakage, and the magnetic leakage indicates in the equipment of magnetic screen, the magnetic field part outside the magnetic screen equipment, and the size of magnetic leakage coefficient is one of the important parameter of deciding the motor performance.
The problem that current permanent-magnet machine rotor magnetic leakage coefficient is big is ubiquitous, and the great stray loss that can cause the motor of magnetic leakage coefficient arouses the motor to generate heat greatly, leads to the energy extravagant, converts partial electric energy into for useless heat energy, has aggravated the temperature rise of motor, and the motor can be damaged to the high temperature, and the while high temperature makes the internal permanent magnet of rotor produce irreversible high temperature loss magnetism easily to influence the working property of motor.
Disclosure of Invention
The invention provides a core structure for a Pocket type rotor, aiming at the problem that the rotor of a permanent magnet motor in the prior art has a large magnetic leakage coefficient.
The technical scheme for solving the technical problems is as follows: a core structure for a Pocket type rotor comprises a core body, wherein a plurality of magnetic steel grooves are radially formed in the core body and used for mounting permanent magnets; and a magnetizer is formed between the adjacent magnetic steel grooves and comprises a first magnetizer sheet and a second magnetizer sheet, a plurality of magnetism blocking grooves are formed in the second magnetizer sheet, and the first magnetizer sheet and the second magnetizer sheet are stacked in a staggered manner to form the magnetizer.
Furthermore, the number of the magnetic resistance grooves is one.
Furthermore, the magnetic resistance groove is of an arc-shaped structure.
Furthermore, the magnetism blocking groove and the second magnetic conductive sheet are arranged concentrically.
Further, the radius of the circle where the magnetic resistance groove is located is smaller than one half of the radius of the circle where the second magnetic conductive sheet is located.
Further, the first magnetic conductive sheet and the second magnetic conductive sheet have the same size.
Furthermore, the thickness of the first magnetic conductive sheet is equal to that of the second magnetic conductive sheet.
Furthermore, the first magnetic conductive sheet and the second magnetic conductive sheet are both made of silicon steel material
The invention has the beneficial effects that: according to the invention, the first magnetic conductive sheets and the second magnetic conductive sheets are stacked in a staggered manner to form a complete magnetizer; the second magnetic conduction sheet is provided with a magnetic resistance groove, and the structure ensures the connection strength of the iron core body; the blocking of magnetic lines of force of a magnetic field generated by the permanent magnets inserted in the magnetic steel grooves is realized; thereby reducing the magnetic leakage of the permanent magnet in the iron core body, namely reducing the magnetic leakage coefficient of the iron core body; the lower magnetic leakage coefficient can lead the motor to convert more electric energy into useful kinetic energy, improve the utilization rate of energy and avoid the motor from being heated and damaged; meanwhile, the irreversible high-temperature loss of magnetism of the permanent magnet in the rotor body of the motor caused by overhigh temperature of the motor is avoided, and the working performance of the motor is influenced.
Drawings
FIG. 1 is a perspective view of a core structure for a Pocket-type rotor according to the present invention;
FIG. 2 is a top view of a core structure for a Pocket-type rotor of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2 of a core construction for a Pocket-type rotor of the present invention;
fig. 4 is an enlarged view of a in fig. 3 for a Pocket type rotor core structure according to the present invention;
fig. 5 is a schematic structural view of a second magnetic conductive plate for a Pocket-type rotor core structure according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. an iron core body; 2. a magnetic steel groove; 3. a magnetizer; 4. a first magnetic conductive sheet; 5. a second magnetic conductive sheet; 6. a magnetic resistance groove.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 5, a core structure for a Pocket type rotor includes a core body 1 and a magnetic steel slot 2 for mounting a permanent magnet;
a magnetizer 3 is formed between the adjacent magnetic steel slots 2, and each magnetizer 3 is formed by overlapping and laminating a first magnetizer sheet 4 and a second magnetizer sheet 5 which have the same size and thickness;
the second magnetic conductive sheet 5 is provided with a magnetic resistance slot 6, and the magnetic resistance slot 6 is arranged for arranging a uniform gap in the magnetic conductor 3 to block a magnetic line of force through the gap and reduce a magnetic leakage coefficient;
the first magnetic conductive sheets 4 and the second magnetic conductive sheets 5 are staggered and laminated, so that the effect of blocking magnetic lines by the magnetic blocking grooves 6 is more uniform;
the first magnetic conductive sheet 4 and the second magnetic conductive sheet 5 may be laminated regularly, or two first magnetic conductive sheets 4 and two second magnetic conductive sheets 5 may be laminated alternately, or other types of lamination may be used, as long as the internal connection strength of the magnetizer 3 is ensured to be strong enough, the first magnetic conductive sheet 4 and the second magnetic conductive sheet 5 are both laminated uniformly or non-uniformly;
in this embodiment, the first magnetic conductive sheets 4 and the second magnetic conductive sheets 5 are preferably laminated in a staggered manner, so that the effect of blocking magnetic lines of force by the magnetic blocking grooves 6 is more uniform, and the magnetic leakage coefficient of the iron core body 1 can be conveniently estimated.
Because the magnetic induction lines of the magnetic field are arc-shaped subsections, in order to enable the arranged magnetic resistance groove to more effectively realize the blocking of magnetic lines of force, the magnetic resistance groove 6 is of an arc-shaped structure;
the magnetic resistance slot 6 with the arc structure can correspond to the magnetic force line, and the magnetic resistance slot 6 can also be arranged in a rectangular shape or other irregular shapes;
in this embodiment, the magnetic resistance slot 6 is preferably an arc-shaped structure, so that the overall structure of the magnetizer 3 is not affected, and the magnetic force lines can be effectively blocked.
In order to ensure the connectivity and the connection strength inside the iron core body and realize the effect of blocking magnetic lines of force, only one magnetic blocking groove 6 is arranged;
the single magnetic resistance slot 6 does not affect the whole structure of the magnetizer 3 formed by the staggered lamination of the first magnetic conductive sheet 4 and the second magnetic conductive sheet 5, and a larger gap can be effectively constructed for blocking the magnetic force line.
In order to make the set gap fully utilized, the magnetic resistance slot 6 and the second magnetic conductive sheet 5 are concentrically arranged, and the arrangement of concentric circles can ensure that the magnetic force line can realize absolute blocking at the magnetic resistance slot 6;
if the arc-shaped magnetic resistance slot 6 is not concentrically designed with the second magnetic conductive sheet 5, the gap between the magnetic lines passing through the magnetic resistance slot 6 is not large enough, and a good magnetic line blocking effect cannot be achieved.
In order to not affect the connection strength inside the iron core body completely, the radius of the circle where the magnetic resistance slot 6 is located is smaller than one half of the radius of the circle where the second magnetic conductive sheet 5 is located;
the position that sets up like this and make hindering magnetic slot 6 is inboard partially, and it is less that inboard receives external force at iron core body during operation, can not arouse deformation because of at the rotational speed too fast, when the moment of torsion is great.
In order to make the shape of the iron core body more regular, ensure that the magnetic steel slot 2 is more stable on mounting the permanent magnet, and simultaneously facilitate better processing of parts, the first magnetic conductive sheet 4 and the second magnetic conductive sheet 5 have the same size;
therefore, the edges of the first magnetic conductive sheet 4 and the second magnetic conductive sheet 5 are aligned to form a side surface which is smoother, and the permanent magnet is more convenient to fix.
In order to enable the magnetic resistance grooves 6 to be uniformly distributed and realize the effect of uniformly blocking magnetic lines of force, the thicknesses of the first magnetic conductive sheet 4 and the second magnetic conductive sheet 5 are equal;
therefore, the magnetic resistance slots 6 can uniformly block magnetic lines, and the magnetic flux leakage coefficient of the iron core body can be conveniently estimated.
In order to realize good magnetic conductivity inside the magnetizer, the first magnetic conductive sheet 4 and the second magnetic conductive sheet 5 are both made of silicon steel, and the silicon steel is good magnetic conductive material.
The specific working principle is as follows: according to the invention, the first magnetic conductive sheets 4 and the second magnetic conductive sheets 5 are laminated in a staggered manner to form a complete magnetizer 3, the second magnetic conductive sheets 5 are provided with the magnetic resistance grooves 6, when the permanent magnet inserted in the magnetic steel grooves 2 generates a magnetic field, most of the magnetic field can be distributed in the magnetizer 3, and part of the magnetic field can be distributed outside the magnetizer 3, so that part of the magnetic field leaks, and the leaked magnetic field can consume electric energy to generate heat when the rotor works, so that in order to reduce the leaked magnetic field, the magnetic resistance grooves 6 are distributed on magnetic lines of the external leakage magnetic field, and the magnetic lines of force can be subjected to larger magnetic resistance at gaps, so that the blocking of the magnetic lines of force can be realized through the magnetic resistance grooves 6, the magnetic field intensity of the leaked magnetic field is weakened, and the magnetic leakage coefficient of the whole iron core body is.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A core structure for a Pocket type rotor comprises a core body (1), wherein a plurality of magnetic steel grooves (2) are radially formed in the core body (1) and used for mounting permanent magnets; it is adjacent form a magnetizer (3) between magnetic steel groove (2), its characterized in that: the magnetizer (3) comprises a first magnetizer sheet (4) and a second magnetizer sheet (5), a plurality of magnetism-resisting grooves (6) are formed in the second magnetizer sheet (5), and a plurality of first magnetizer sheets (4) and the second magnetizer sheets (5) are stacked in a staggered mode to form the magnetizer ((3)).
2. A core structure for a Pocket-type rotor as claimed in claim 1, wherein: the number of the magnetic resistance grooves (6) is one.
3. A core structure for a Pocket-type rotor as claimed in claim 1 or 2, wherein: the magnetic resistance groove (6) is of an arc-shaped structure.
4. A core structure for a Pocket-type rotor as claimed in claim 3, wherein: the magnetic resistance groove (6) and the second magnetic conductive sheet are arranged concentrically.
5. A structure for a bucket-type rotor core according to claim 4, wherein: the radius of the circle where the magnetic resistance groove (6) is located is smaller than one half of the radius of the circle where the second magnetic conductive sheet (5) is located.
6. A core structure for a Pocket-type rotor as claimed in claim 1, wherein: the first magnetic conductive sheet (4) and the second magnetic conductive sheet (5) are the same in size.
7. A core structure for a Pocket-type rotor as claimed in claim 1, wherein: the thicknesses of the first magnetic conductive sheet (4) and the second magnetic conductive sheet (5) are equal.
8. A core structure for a Pocket-type rotor as claimed in claim 1, wherein: the first magnetic conductive sheet (4) and the second magnetic conductive sheet (5) are both made of silicon steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010403931.1A CN111668951B (en) | 2020-05-13 | 2020-05-13 | Rotor core structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010403931.1A CN111668951B (en) | 2020-05-13 | 2020-05-13 | Rotor core structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111668951A true CN111668951A (en) | 2020-09-15 |
| CN111668951B CN111668951B (en) | 2021-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010403931.1A Active CN111668951B (en) | 2020-05-13 | 2020-05-13 | Rotor core structure |
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| CN (1) | CN111668951B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62193537A (en) * | 1986-02-17 | 1987-08-25 | Fanuc Ltd | Permanent field rotor |
| JP2001037121A (en) * | 1999-07-21 | 2001-02-09 | Y Ii Drive:Kk | Permanent magnet type rotor |
| CN202475063U (en) * | 2012-03-06 | 2012-10-03 | 深圳市福义乐磁性材料有限公司 | Rotor sheet structure |
| CN105048667A (en) * | 2014-04-30 | 2015-11-11 | 马渊马达株式会社 | Rotor and brushless motor |
| CN206790237U (en) * | 2017-04-01 | 2017-12-22 | 蒂森克虏伯电梯（上海）有限公司 | Motor rotor punching sheet and rotor and motor with the punching |
| CN207234556U (en) * | 2017-08-09 | 2018-04-13 | 珠海格力节能环保制冷技术研究中心有限公司 | Tangential motor, tangential rotor and its rotor core |
| CN108667171A (en) * | 2017-03-29 | 2018-10-16 | 大陆汽车电子(芜湖)有限公司 | The rotor and brushless motor of brushless motor |
-
2020
- 2020-05-13 CN CN202010403931.1A patent/CN111668951B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62193537A (en) * | 1986-02-17 | 1987-08-25 | Fanuc Ltd | Permanent field rotor |
| JP2001037121A (en) * | 1999-07-21 | 2001-02-09 | Y Ii Drive:Kk | Permanent magnet type rotor |
| CN202475063U (en) * | 2012-03-06 | 2012-10-03 | 深圳市福义乐磁性材料有限公司 | Rotor sheet structure |
| CN105048667A (en) * | 2014-04-30 | 2015-11-11 | 马渊马达株式会社 | Rotor and brushless motor |
| CN108667171A (en) * | 2017-03-29 | 2018-10-16 | 大陆汽车电子(芜湖)有限公司 | The rotor and brushless motor of brushless motor |
| CN206790237U (en) * | 2017-04-01 | 2017-12-22 | 蒂森克虏伯电梯（上海）有限公司 | Motor rotor punching sheet and rotor and motor with the punching |
| CN207234556U (en) * | 2017-08-09 | 2018-04-13 | 珠海格力节能环保制冷技术研究中心有限公司 | Tangential motor, tangential rotor and its rotor core |
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| Publication number | Publication date |
|---|---|
| CN111668951B (en) | 2021-12-21 |
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