CN109067030B - Stator iron core of permanent magnet motor of electric automobile stator - Google Patents
Stator iron core of permanent magnet motor of electric automobile stator Download PDFInfo
- Publication number
- CN109067030B CN109067030B CN201811097592.8A CN201811097592A CN109067030B CN 109067030 B CN109067030 B CN 109067030B CN 201811097592 A CN201811097592 A CN 201811097592A CN 109067030 B CN109067030 B CN 109067030B
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- stator
- permanent magnet
- yoke
- magnetic
- stator poles
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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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/17—Stator cores with permanent magnets
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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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a stator iron core of a permanent magnet motor of an electric automobile stator, which belongs to the field of automobile motors and is formed by stamping strip-shaped silicon steel plates, wherein the stator iron core can be divided into a magnetic yoke with a thicker magnetic yoke part and a connecting yoke with a thinner magnetic yoke part according to the thickness of the magnetic yoke part; the permanent magnet is embedded into the magnetic yoke; the number of the magnetic guide yokes and the number of the connecting yokes are even, the outer parts of the magnetic guide yokes and the connecting yokes are all arc-shaped, and the curvature radii of the magnetic guide yokes and the connecting yokes are the same and equal to one half of the inner diameter of the motor shell; during punching, the magnetic yoke and the connecting yoke are nested in a face-to-face mode. Compared with the stator core structure and the manufacturing process of the existing stator permanent magnet motor, the magnetic paths between each pair of poles of the permanent magnet motor are mutually isolated, so that the possibility of fault propagation caused by faults is reduced; two stator cores which are nested face to face are stamped at the same time, so that the manufacturing efficiency is high; the strip-shaped silicon steel sheet is used for stamping, so that the waste is less.
Description
Technical Field
The invention relates to a stator iron core of a permanent magnet motor of an electric automobile stator, and belongs to the technical field of automobile motors.
Background
The stator permanent magnet motor is named after a permanent magnet structure is arranged on a stator thereof, and can be divided into three categories according to different excitation modes: a Permanent Magnet Doubly Salient (DSPM) motor, a flux switching motor, and a reverse flux link motor. The stator permanent magnet motor has the advantages of simple structure, high reliability and the like of the switched reluctance motor, and also has the advantages of high power-weight ratio, low loss and the like of the permanent magnet brushless motor, so that the stator permanent magnet motor is more and more concerned by people. However, the magnetic field of the stator permanent magnet motor is not adjustable, so that the problem that the output voltage changes along with the change of the rotating speed and the load when the permanent magnet motor is used as a generator exists.
Some stator permanent magnet motor solutions have been proposed. For example, the published chinese invention patents: controllable rectification power generation system of permanent magnetism doubly salient motor, application number: 201110062873.1, the system is composed of a permanent magnet double salient pole generator, a three-phase half-wave controllable rectification circuit and a rectification controller, the rectification controller can send out a driving signal corresponding to an insulated gate transistor when the potential of each phase winding is positive according to the position of a generator rotor, armature current and a rectification voltage signal, so that the phase current tracks the phase voltage waveform, and the rectification and power factor correction of the double salient pole generator by the rectification circuit are realized. The invention patent announced: single-phase bridge rectification power generation circuit of electric excitation doubly salient motor, application number: 201010286836.4, discloses a single-phase bridge rectification generating circuit of an electric excitation double salient pole motor, which adjusts the air gap field of the motor by adjusting the current of an electric excitation winding to keep the output voltage stable. The granted invention patent: hybrid excitation doubly salient motor, grant number: ZL200910098788.3 discloses a hybrid excitation doubly salient motor composed of a rotor, a stator, a three-phase armature winding, a single-phase excitation winding and a casing, wherein permanent magnet excitation and excitation winding electric excitation jointly synthesize an air-gap magnetic field, so that adjustability of the air-gap magnetic field is realized, and meanwhile, a magnetic conductive material is adopted as the casing, so that magnetic leakage at the outer edge of the stator is avoided, the utilization rate of the permanent magnet is improved, and the electromagnetic compatibility of the motor is improved. The above invention controls the system output by controlling the current of the electric excitation winding or by using a controllable rectifying circuit.
At present, the stator punching sheet is circular, waste scraps are large after the punching of the strip-shaped steel plate, and the waste of materials is serious. Therefore, it is necessary to provide a stator punching structure with less waste scraps.
Disclosure of Invention
The invention aims to provide a stator punching sheet structure with few waste scraps, which can save the usage amount of silicon steel sheets to the maximum extent while isolating faults, a magnetic field and a thermal field, and adopts the following technical scheme:
the stator permanent magnet motor comprises a stator iron core of a stator permanent magnet motor, wherein the stator iron core is formed by stamping a strip-shaped silicon steel plate, a plurality of even number of stator poles are uniformly distributed on a stator stamping sheet, every two adjacent stator poles form a pair of stator poles, and a magnetic yoke part between the pair of stator poles which are parallel to each other is thick and is called a magnetic guide yoke; the yoke part between two adjacent pairs of stator poles is thin and is called as a connecting yoke;
the middle of the magnetic guide yoke is provided with a groove, a permanent magnet is embedded in the groove, and the permanent magnet is magnetized in a direction vertical to the stator teeth;
all the stator poles are parallel during punching, and the width of one pair of stator poles is equal to the distance between two adjacent pairs of stator poles;
the outer part of the magnetic guide yoke is in an arc shape, and the diameter of the arc is equal to the inner diameter of the motor shell;
the outer part of the connecting yoke is in a circular arc shape, and the outer diameter of the circular arc is equal to the inner diameter of the motor shell;
the punched strip-shaped stator cores are bent at the connecting yoke, and all the stator cores are bent to form a circular ring and can be installed in a motor shell.
The invention has the following beneficial effects:
(1) the two same stator iron cores are nested face to face, so that the usage amount of silicon steel sheets can be saved to the greatest extent, and the manufacturing efficiency of the stator iron cores can be improved;
(2) the magnetic circuits between the opposite poles are mutually isolated, so that faults can be effectively isolated, a thermal field and a magnetic field can be isolated, and fault propagation caused by faults can be reduced;
(3) the bar-shaped silicon steel sheet is adopted for manufacturing, and the scrap is less.
Drawings
Fig. 1 is a structural view of a stator core of a permanent magnet brushless motor according to the present invention when the stator core is pressed. Wherein: 41. a yoke, 42, a connecting yoke.
Fig. 2 is a structure diagram of a stator iron core of the permanent magnet brushless motor according to the present invention after punching. Wherein: 41. a yoke, 42, a connecting yoke.
Fig. 3 is a side cross-sectional view of a stator permanent magnet brushless motor to which the stator core of the present invention is applied. Wherein: 1. the motor comprises a motor shell, 2 permanent magnets, 3 shafts, 4 stator cores, 5 armature windings.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a structural diagram of a stator permanent magnet brushless motor stator core during stamping, wherein the stator core is stamped from a strip-shaped silicon steel plate, a plurality of even number of stator poles are uniformly distributed on a stator stamping sheet, every two adjacent stator poles form a pair of stator poles, and the pair of stator poles are parallel to each other and have thick magnetic yoke parts therebetween, which are called magnetic guide yokes; the yoke part between two adjacent pairs of stator poles is thin and is called as a connecting yoke;
the middle of the magnetic guide yoke is provided with a groove, a permanent magnet is embedded in the groove, and the permanent magnet is magnetized in a direction vertical to the stator teeth;
all the stator poles are parallel during punching, and the width of one pair of stator poles is equal to the distance between two adjacent pairs of stator poles.
The outside of the magnetic yoke is arc-shaped, and the diameter of the arc is equal to the inner diameter of the motor shell.
The outside of the connecting yoke is arc-shaped, and the outer diameter of the arc is equal to the inner diameter of the motor shell.
In the structure diagram of the stator permanent magnet motor stator iron core after stamping shown in fig. 2, the stator iron core is stamped from a strip-shaped silicon steel plate, a plurality of even number of stator poles are uniformly distributed on a stator stamping sheet, every two adjacent stator poles form a pair of stator poles, and the pair of stator poles are parallel to each other and have thick magnetic yoke parts therebetween, which are called magnetic guide yokes; the yoke part between two adjacent pairs of stator poles is thin and is called as a connecting yoke;
the middle of the magnetic guide yoke is provided with a groove, a permanent magnet is embedded in the groove, and the permanent magnet is magnetized in the direction perpendicular to the stator teeth.
Fig. 3 is a side sectional view of a permanent magnet brushless motor stator to which the stator core of the present invention is applied, in which the punched bar-shaped stator cores are bent at the connecting yoke, and all the stator cores are bent to form a ring and can be mounted in a motor housing.
The two rows of stator punching sheets are alternately arranged in a mode of facing stator poles, namely, a pair of stator poles of the first row of stator punching sheets is embedded into a gap between two adjacent pairs of stator poles of the second row of stator punching sheets.
Claims (2)
1. Electric automobile stator permanent-magnet machine stator core, its characterized in that:
the stator iron core is formed by stamping a strip-shaped silicon steel plate, a plurality of even number of stator poles are uniformly distributed on a stator stamping sheet, every two adjacent stator poles form a pair of stator poles, and the pair of stator poles are parallel to each other and the thickness of a magnetic yoke part between the stator poles is called as a magnetic guide yoke; the yoke part between two adjacent pairs of stator poles is thin and is called as a connecting yoke;
the middle of the magnetic guide yoke is provided with a groove, a permanent magnet is embedded in the groove, and the permanent magnet is magnetized in a direction vertical to the stator teeth;
all the stator poles are parallel during punching, and the width of one pair of stator poles is equal to the distance between two adjacent pairs of stator poles;
the outer part of the magnetic guide yoke is in an arc shape, and the diameter of the arc is equal to the inner diameter of the motor shell;
the outside of the connecting yoke is arc-shaped, and the outer diameter of the arc is equal to the inner diameter of the motor shell.
2. The stator core of the permanent magnet motor for the stator of the electric vehicle as claimed in claim 1, wherein:
the punched strip-shaped stator cores are bent at the connecting yoke, and all the stator cores are bent to form a circular ring and can be installed in a motor shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811097592.8A CN109067030B (en) | 2018-09-20 | 2018-09-20 | Stator iron core of permanent magnet motor of electric automobile stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811097592.8A CN109067030B (en) | 2018-09-20 | 2018-09-20 | Stator iron core of permanent magnet motor of electric automobile stator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109067030A CN109067030A (en) | 2018-12-21 |
| CN109067030B true CN109067030B (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811097592.8A Active CN109067030B (en) | 2018-09-20 | 2018-09-20 | Stator iron core of permanent magnet motor of electric automobile stator |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912298B (en) * | 2019-12-11 | 2021-09-07 | 山东理工大学 | Permanent magnet stator modularized motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102204062A (en) * | 2008-11-03 | 2011-09-28 | 菲艾姆股份有限公司 | Electrical machine |
| CN104201835A (en) * | 2014-09-09 | 2014-12-10 | 安徽可能电机科技有限公司 | Forming method of Y series industrial motor stator punching sheet |
| CN106549549A (en) * | 2017-01-14 | 2017-03-29 | 山东理工大学 | A kind of two-phase stepping motor |
| CN107070156A (en) * | 2017-05-08 | 2017-08-18 | 史立伟 | A kind of attached brushless DC motor of electric vehicle |
| CN107070014A (en) * | 2017-05-08 | 2017-08-18 | 史立伟 | A kind of composite excitation servomotor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002369416A (en) * | 2001-06-06 | 2002-12-20 | Nippon Keiki Works Ltd | Yoke structure of thin-type fan motor |
| CN104935095A (en) * | 2015-06-15 | 2015-09-23 | 西安交通大学 | U-shaped stator hybrid-excitation switch reluctance machine |
| CN106849393A (en) * | 2016-09-28 | 2017-06-13 | 金锡俊 | The stator core of vehicle-mounted dlternator |
-
2018
- 2018-09-20 CN CN201811097592.8A patent/CN109067030B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102204062A (en) * | 2008-11-03 | 2011-09-28 | 菲艾姆股份有限公司 | Electrical machine |
| CN104201835A (en) * | 2014-09-09 | 2014-12-10 | 安徽可能电机科技有限公司 | Forming method of Y series industrial motor stator punching sheet |
| CN106549549A (en) * | 2017-01-14 | 2017-03-29 | 山东理工大学 | A kind of two-phase stepping motor |
| CN107070156A (en) * | 2017-05-08 | 2017-08-18 | 史立伟 | A kind of attached brushless DC motor of electric vehicle |
| CN107070014A (en) * | 2017-05-08 | 2017-08-18 | 史立伟 | A kind of composite excitation servomotor |
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| CN109067030A (en) | 2018-12-21 |
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