CN108206595B - Permanent magnet motor - Google Patents
Permanent magnet motor Download PDFInfo
- Publication number
- CN108206595B CN108206595B CN201611184195.5A CN201611184195A CN108206595B CN 108206595 B CN108206595 B CN 108206595B CN 201611184195 A CN201611184195 A CN 201611184195A CN 108206595 B CN108206595 B CN 108206595B
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- Prior art keywords
- winding
- stator
- permanent magnet
- stator teeth
- magnet motor
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Classifications
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- 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
Abstract
The invention provides a permanent magnet motor stator and a permanent magnet motor, wherein the stator comprises stator teeth which are axially and equidistantly arranged, the stator teeth comprise wide stator teeth and thin stator teeth, the width of the wide stator teeth is larger than that of the thin stator teeth, and each wide stator tooth and each thin stator tooth are adjacently arranged; the permanent magnet motor comprises a main winding and an auxiliary winding, wherein the main winding is connected with the auxiliary winding, and when the main winding and the auxiliary winding are connected in series, the number of turns of the main winding and the auxiliary winding is half of that of the windings when the fine stator teeth are not added; when the main winding and the auxiliary winding are connected in parallel, the number of turns of the main winding and the auxiliary winding is the same as that of the windings when the fine stator teeth are not additionally arranged, so that the coil winding complexity is reduced.
Description
Technical Field
The invention belongs to the field of motors, and particularly relates to a permanent magnet motor stator and a permanent magnet motor.
Background
The permanent magnet motor is more and more widely applied in a high-performance control system, compared with the traditional fractional-slot distributed winding permanent magnet motor, the fractional-slot concentrated winding permanent magnet motor is more and more applied in a plurality of industrial occasions, particularly an electric driving system of an electric automobile, because compared with the traditional permanent magnet motor, the fractional-slot concentrated winding permanent magnet motor can remarkably reduce the size of an end winding, saves copper, has less copper loss, can reduce the weight and the volume of the motor, reduces the winding resistance, improves the efficiency and the power density of the motor and saves the cost; the windings are not crossed, interphase insulation faults are not generated, and the reliability of the motor is improved.
However, the fractional slot concentrated winding permanent magnet motor air gap field contains a large number of fractional times and higher harmonics, which can increase electromagnetic vibration of the motor, induce larger eddy currents in the stator, and cause high temperature rise when eddy current loss is serious, so that permanent magnet local demagnetization is caused.
Disclosure of Invention
The invention aims to provide a permanent magnet motor stator and a permanent magnet motor, which are used for solving the problem that a fractional slot winding permanent magnet motor in the prior art has large-amplitude harmonic waves.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the utility model provides a permanent magnet motor stator, includes the stator tooth that axial equidistant set up, the stator tooth includes wide stator tooth and thin stator tooth, wide stator tooth width is greater than thin stator tooth width, every wide stator tooth and thin stator tooth are adjacent to be arranged.
Further, the height of the wide stator teeth is H s Width t of wide stator teeth s The height of the fine stator teeth is H s The width of the fine stator teeth takes the value range ofWherein P is the pole pair number, z' is the stator slot number, t s Is the width of the wide stator teeth.
Further, the height of the thin stator teeth is the same as the height of the wide stator teeth.
The invention also provides a permanent magnet motor, which comprises a stator, wherein the stator comprises a plurality of stator teeth which are arranged at equal intervals, the stator teeth comprise wide stator teeth and thin stator teeth, and the wide stator teeth and the thin stator teeth are adjacently arranged.
Further, the height of the thin stator teeth is the same as the height of the wide stator teeth.
Further, the permanent magnet motor includes a main winding and an auxiliary winding.
Further, the main winding and the auxiliary winding are three-phase windings.
Further, each phase winding of the three-phase windings is at an angle of m slots to each other, where m=z ' -1, z ' is the number of stator slots, and z ' is an even number.
Further, the main winding and the auxiliary winding are connected in series or in parallel.
The beneficial effects of the invention are as follows:
the invention provides a permanent magnet motor stator and a permanent magnet motor, wherein the stator comprises thin stator teeth and wide stator teeth, a structure with unequal stator tooth widths is formed, and a main winding and an auxiliary winding can be formed by adopting the permanent magnet motor with the stator structure to form a double-winding motor, so that the harmonic wave of the permanent magnet motor can be greatly reduced or eliminated, and the electromagnetic vibration and the eddy current loss of a rotor are reduced.
The double-winding permanent magnet motor provided by the invention has the advantages that the main winding and the auxiliary winding are connected in series or in parallel, and when the main winding and the auxiliary winding are connected in series, the number of turns of the main winding is the same as that of the auxiliary winding and is half of that of the winding when only wide stator teeth are arranged in the prior art; when the parallel connection mode is adopted, the number of turns of the main winding is the same as that of the auxiliary winding, and the number of turns of the winding is the same as that of the winding when only the wide stator teeth are adopted originally, so that the coil winding complexity is reduced.
Drawings
FIG. 1 is a stator block diagram of a fractional slot concentrated winding permanent magnet motor;
FIG. 2 is an expanded view of the stator structure with the addition of fine stator teeth;
FIG. 3 is a graph of three-phase windings after addition of fine stator teeth;
fig. 4 is a schematic diagram of the number of winding turns after adding fine stator teeth.
Detailed Description
The following describes the embodiments of the present invention further with reference to the accompanying drawings:
an embodiment of the permanent magnet motor of the present invention:
in the prior art, a fractional slot concentrated winding permanent magnet motor is mostly adopted, and an 8-pole 9-slot permanent magnet motor is taken as an example, for example, a permanent magnet motor in fig. 1 is adopted, and 9 stator teeth, namely the wide stator teeth in the invention, are formed on a stator:
specifically, as shown in FIG. 1, numerals 1 to 9 denote the numbers of the stator slots, namely stator slots 1 to 9, indicating the direction of the current, +.>The current flows into the paper surface in the direction of->Is out of the paper; a, B, C are three-phase windings, A+ is positive direction of A phase (i.e. current direction is flowing into paper), A-is negative direction of A phase (i.e. current direction is flowing out of paper); n, S the polarity of the permanent magnets, N, S, are alternately arranged.
In order to reduce or eliminate the harmonic wave of the concentrated winding permanent magnet motor with double winding fractional slots, a method for adding a thin stator tooth in the stator teeth is often adopted on the basis of fig. 1. The height of the thin stator teeth is the same as that of the wide stator teeth, and the width of the thin stator teeth takes the value range ofWherein P is the pole pair number, z' is the number of stator slots after adding the fine stator teeth, and is even, t s For the width of the wide stator teeth, a motor stator development diagram is formed by adding thin stator teeth in stator slots formed by the wide stator teeth, and particularly as shown in fig. 2, the diagram comprises original stator teeth and newly added thin stator teeth.
The double windings formed as described above are denoted by main windings and auxiliary windings, respectively, which are at an angle of m slots to each other after adding fine stator teeth, where m (m=3, 5,7, …, z '-1), where z' represents the number of stator slots. The main winding and the auxiliary winding respectively adopt a three-phase winding form, and are specifically shown in fig. 3, wherein the main winding is represented by a serial number 1, the auxiliary winding is represented by a serial number 2, the m value in the phase difference m slot angle is matched with the pole slot of the motor, the m value with the smallest harmonic can be selected according to magnetic circuit simulation, and the angle of 5 slots of A < 1+ > and A < 2+ > is different by taking an A-phase winding as an example, and the harmonic is the smallest.
The double-winding permanent magnet motor formed by adding the thin stator teeth is different from the mode of adding grooves in the stator slots. The main winding and the auxiliary winding are connected in series or in parallel, and when the main winding and the auxiliary winding are connected in series, the number of turns of the main winding is equal to that of the auxiliary winding and is half of that of the winding when the thin stator teeth are not added; when the parallel connection mode is adopted, the number of turns of the main winding is equal to that of the auxiliary winding, and the number of turns of the winding is the same as that when the thin stator teeth are not added; in order to reduce harmonic waves, a single winding set of the conventional double-winding motor adopts the mode that turns are unequal to form sinusoidal distribution, and coil winding is complex. Therefore, the winding method reduces the complexity of winding and eliminates the harmonic wave of specific times.
As shown in fig. 4, a schematic diagram of the number of turns of the main winding and the auxiliary winding is shown, N1 represents the number of turns of the main winding coil, N2 represents the number of turns of the auxiliary winding coil, and N1 and N2 are equal.
In the above embodiment, the number of turns of the main winding and the auxiliary winding are equal, and as other embodiments, the number of turns of the main winding and the auxiliary winding may be adjusted by a finite element method.
The invention also provides a permanent magnet motor stator, wherein stator teeth are axially and equidistantly arranged on the stator, the stator teeth comprise wide stator teeth and thin stator teeth, the structure of the stator is described in more detail in the embodiment of the permanent magnet motor, and therefore, the description is omitted here.
The above gives a specific embodiment to which the present invention relates, but the present invention is not limited to the described embodiment. Under the thought of the invention, the technical means in the embodiment are changed, replaced and modified in a manner which is easily thought to a person skilled in the art, and the technical means have basically the same functions and the same realization purposes as the corresponding technical means in the invention, so that the technical scheme is formed by fine tuning the embodiment, and the technical scheme still falls into the protection scope of the invention.
Claims (4)
1. The utility model provides a permanent magnet motor, includes stator, main winding and auxiliary winding, the stator includes the stator tooth that a plurality of equidistant set up, its characterized in that, the stator tooth includes wide stator tooth and thin stator tooth, wide stator tooth and thin stator tooth are adjacent to be arranged, main winding with auxiliary winding is the angle of m groove each other, wherein m = z ' -1, z ' is the stator slot number, and z ' is even.
2. The permanent magnet machine of claim 1 wherein the height of the thin stator teeth is the same as the height of the wide stator teeth.
3. The permanent magnet machine of claim 2 wherein the main winding and auxiliary winding are three-phase windings.
4. A permanent magnet machine according to claim 1 or 3, wherein the main winding and the auxiliary winding are connected in series or parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611184195.5A CN108206595B (en) | 2016-12-20 | 2016-12-20 | Permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611184195.5A CN108206595B (en) | 2016-12-20 | 2016-12-20 | Permanent magnet motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108206595A CN108206595A (en) | 2018-06-26 |
| CN108206595B true CN108206595B (en) | 2023-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611184195.5A Active CN108206595B (en) | 2016-12-20 | 2016-12-20 | Permanent magnet motor |
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| CN (1) | CN108206595B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109149818A (en) * | 2018-10-25 | 2019-01-04 | 南京康尼电子科技有限公司 | A kind of low-cost and high-performance harmonic wave cuts the continuous pole permanent-magnet synchronous machine of polar form |
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| CN105186733A (en) * | 2015-10-22 | 2015-12-23 | 山东大学 | Double-winding high-powder-density mixed excitation permanent-magnet linear generator |
| CN206402002U (en) * | 2016-12-20 | 2017-08-11 | 郑州宇通客车股份有限公司 | Permanent magnet motor stator and magneto |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008051047B4 (en) * | 2008-10-09 | 2015-07-30 | Feaam Gmbh | Electric machine |
| WO2013054439A1 (en) * | 2011-10-14 | 2013-04-18 | 三菱電機株式会社 | Permanent magnet motor |
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2016
- 2016-12-20 CN CN201611184195.5A patent/CN108206595B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201515263U (en) * | 2009-09-11 | 2010-06-23 | 深圳航天科技创新研究院 | Big and small tooth structural square-wave three-phase permanent magnet DC motor |
| CN102124626A (en) * | 2009-09-11 | 2011-07-13 | 深圳航天科技创新研究院 | Square-wave three-phase permanent magnet direct current motor provided with large teeth and small teeth structure and the assembling method thereof |
| CN102290883A (en) * | 2011-08-26 | 2011-12-21 | 东南大学 | Redundant excitation double-armature winding multiphase magnetic flux switching motor with fault-tolerant teeth |
| CN202798389U (en) * | 2012-09-07 | 2013-03-13 | 南京航空航天大学 | Side-by-side mixing excitation alternating current generator |
| CN203289296U (en) * | 2013-05-15 | 2013-11-13 | 东南大学 | A double-speed winding stator surface mounting-type double-salient pole permanent magnet motor |
| CN104079085A (en) * | 2014-07-08 | 2014-10-01 | 顾明 | Motor and sine stator |
| CN104716808A (en) * | 2015-03-12 | 2015-06-17 | 南京航空航天大学 | Multiphase electro-magnetic synchronous motor |
| CN204408154U (en) * | 2015-03-13 | 2015-06-17 | 南京信息工程大学 | A kind of double winding modular stator permanent-magnet type magnetic flux switches bearing-free motor |
| CN105099112A (en) * | 2015-08-24 | 2015-11-25 | 浙江亿利达风机股份有限公司 | Single-phase permanent magnet brushless direct-current motor with auxiliary teeth and auxiliary windings |
| CN105186733A (en) * | 2015-10-22 | 2015-12-23 | 山东大学 | Double-winding high-powder-density mixed excitation permanent-magnet linear generator |
| CN206402002U (en) * | 2016-12-20 | 2017-08-11 | 郑州宇通客车股份有限公司 | Permanent magnet motor stator and magneto |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108206595A (en) | 2018-06-26 |
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Address after: No. 6, Yutong Road, Guancheng Hui District, Zhengzhou, Henan 450061 Applicant after: Yutong Bus Co.,Ltd. Address before: 450016 Yutong Industrial Zone, eighteen Li River, Henan, Zhengzhou Applicant before: ZHENGZHOU YUTONG BUS Co.,Ltd. |
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