CN112583149A - High-power-density permanent magnet motor stator and coil inserting method thereof - Google Patents
High-power-density permanent magnet motor stator and coil inserting method thereof Download PDFInfo
- Publication number
- CN112583149A CN112583149A CN202011400413.0A CN202011400413A CN112583149A CN 112583149 A CN112583149 A CN 112583149A CN 202011400413 A CN202011400413 A CN 202011400413A CN 112583149 A CN112583149 A CN 112583149A
- Authority
- CN
- China
- Prior art keywords
- coil
- groove
- iron core
- stator
- slot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
- H02K1/12—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
- 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
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/04—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings prior to their mounting into the machines
- H02K15/043—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings prior to their mounting into the machines winding flat conductive wires or sheets
- H02K15/0431—Concentrated windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/08—Forming windings by laying conductors into or around core parts
- H02K15/085—Forming windings by laying conductors into or around core parts by laying conductors into slotted stators
-
- 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
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in 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
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Windings For Motors And Generators (AREA)
Abstract
本发明涉及电机的制造技术领域，传统的电机拓扑结构已远远不能满足电动航空领域结构紧凑、体积小、重量轻的要求。本发明提供了一种高功率密度永磁电机定子及其线圈下线方法，所述高功率密度永磁电机定子，包括定子铁芯和线圈，定子铁芯的铁芯槽采用半开口槽型，铁芯槽有且仅有一侧设有槽肩，以使铁芯槽形成非对称结构；线圈采用半成型线圈，线圈采用散下线的方式固定在定子铁芯上；通过半开口槽型上设置槽肩，并与半成型线圈设计的有效结合，成功解决了开口槽与矩形线圈配合漏磁大、转子谐波损耗大的缺点，另增加了定子槽内与线圈直接接触冷却风道，能够大幅度提高电机的冷却效率，进而提高其功率密度。The invention relates to the technical field of motor manufacturing, and the traditional motor topology structure is far from meeting the requirements of compact structure, small size and light weight in the field of electric aviation. The invention provides a stator of a high-power density permanent magnet motor and a method for winding off the coil thereof. The stator of the high-power density permanent magnet motor includes a stator iron core and a coil, and the iron core slot of the stator iron core adopts a semi-open slot type. The iron core slot has one and only one side is provided with a slot shoulder, so that the iron core slot forms an asymmetric structure; the coil adopts a semi-formed coil, and the coil is fixed on the stator iron core by means of scattered wire; The slot shoulder, and the effective combination with the semi-formed coil design, successfully solved the shortcomings of large flux leakage and large rotor harmonic loss when the open slot and the rectangular coil were matched. The cooling efficiency of the motor is greatly improved, thereby increasing its power density.
Description
Technical Field
The invention relates to the technical field of motor manufacturing, in particular to a high-power-density permanent magnet motor stator and a coil inserting method thereof.
Background
At present, the sea, land and air transportation vehicles are increasingly driven by electricity, and especially in the field of electric aviation, the requirements on the power density of a driving motor of the vehicles are very strict. The traditional motor topological structure can not meet the requirement, and a novel motor structure with compact structure, small volume and light weight needs to be provided to meet the market demand urgently. The half-open slot type motor used in the field of electric aviation mostly adopts a mode of wire unloading of scattered wires (the copper slot filling rate of the scattered wires is low, the occupation ratio of insulating materials is high, and heat dissipation is not facilitated), and has the defects of large magnetic flux leakage and large harmonic loss of a rotor, so that the heat capacity and the power density are low.
For this reason, the development of a permanent magnet motor stator with high heat capacity and power density is a problem to be solved urgently.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the existing defects and provide a high-power-density permanent magnet motor stator and a coil inserting method thereof so as to improve the heat capacity and the power density of the motor stator.
In order to achieve the above object, the first aspect of the present invention is achieved by the following technical solutions: a high-power-density permanent magnet motor stator comprises a stator core and a coil, wherein an iron core groove of the stator core is a half-open groove type, and a groove shoulder is arranged on one side of the iron core groove, so that the iron core groove forms an asymmetric structure; the coil is a semi-formed coil and is fixed on the stator core in a scattered coil mode; each of the coils has a span of one stator tooth.
By adopting the arrangement, the groove shoulder is arranged on one side of the iron core groove, the magnetic leakage coefficient of a plurality of poles and few grooves can be reduced, the air gap magnetic field harmonic wave is reduced, the rotor loss is reduced, and meanwhile, the efficiency of inserting the wire is improved by adopting the semi-formed coil.
The further preferable scheme of the invention is as follows: the notch of the iron core groove is provided with a groove wedge, and the other side of the iron core groove is provided with a groove for matching with the groove shoulder to fix the groove wedge.
The further preferable scheme of the invention is as follows: the coil adopts flat copper wires, and the flat copper wires are not solidified after being wound and formed by a winding former so as to enable the flat copper wires to be stretched up and down. By the arrangement, the utilization rate of the copper wire is greatly improved; because the wire is not solidified after being wound and molded by the winding die, the copper wires can be stretched up and down, and the coil inserting of the semi-open slot rectangular coil is realized.
The further preferable scheme of the invention is as follows: the cross-section of the flat copper wire is rectangular, and after the coil is off-line, the coil is attached to the wall of the iron core groove.
The further preferable scheme of the invention is as follows: a gap is reserved between the coils positioned on the two sides of the slot wall of the iron core slot, so as to form an air duct passing through the stator iron core axially; the number of the ventilation channels is the same as that of the iron core slots.
According to the arrangement, after the coil is inserted, the ventilating duct with one narrow end and one wide end is naturally formed, the contact area is large, interlayer insulation can be eliminated, the cooling medium (air) is directly contacted with the coil, and the heat dissipation efficiency is improved.
The further preferable scheme of the invention is as follows: the iron core slot is arranged on the outer side of the stator iron core and is used for being configured on the inner rotor permanent magnet motor.
The further preferable scheme of the invention is as follows: the iron core slot is arranged on the inner side of the stator iron core and is used for being configured on the outer rotor permanent magnet motor.
The further preferable scheme of the invention is as follows: the stator core is formed by laminating silicon steel sheets or pressing amorphous iron powder.
The present invention provides, in a second aspect, a coil inserting method for inserting a coil of a high power density permanent magnet motor stator according to the first aspect, comprising,
s1: when the first half-formed coil is off-line, the coil is close to the first iron core groove, the coil side is put into the groove from the side of the first iron core groove with the groove shoulder, and the other coil side is suspended in the air by stretching and is not put into the groove;
s2: when a second half-formed coil is off-line, the coil is close to a second iron core groove, the coil edge is lowered into the groove from one side of the second iron core groove with the groove shoulder, and then the other coil edge is lowered into the adjacent iron core groove across one stator tooth;
s3: repeating the step S2 for the third half-formed coil to the last half-formed coil to be off-line;
s4: finally, bending the suspended coil edge on the first half-formed coil and inserting the coil edge into the iron core slot positioned at the last to finish inserting the coil;
the groove shoulder is positioned on the left side or the right side of the iron core groove, and the coil inserting is carried out according to the sequence of successive right inserting or successive left inserting when the half-and-half formed coil is inserted.
In conclusion, the invention has the following beneficial effects: through setting up the groove shoulder on the half open slot type to with the effective combination of half shaping coil design, successfully solved open slot and rectangular coil cooperation magnetic leakage big, the big shortcoming of rotor harmonic loss, increased in addition the stator inslot with coil direct contact cooling air duct, can increase substantially the cooling efficiency of motor, and then improve its power density.
Drawings
Fig. 1 is a schematic structural diagram of a high power density permanent magnet motor stator described in embodiment 1.
Fig. 2 is a radial cross-sectional view of the high power density permanent magnet motor stator described in example 1.
Fig. 3 is a schematic view of the structure of the stator core described in embodiment 1.
Fig. 4 is a schematic structural view of the half-formed coil described in embodiment 1.
Fig. 5 is a radial cross-sectional view of the high power density permanent magnet motor stator described in example 2.
Wherein: 100. a stator core; 110. an iron core groove; 120. a groove shoulder; 130. a slot wedge; 140. a groove; 150. an air duct; 200. and a coil.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example 1:
as shown in fig. 1 to 3, the present embodiment illustrates a high power density permanent magnet motor stator, which includes a stator core 100 and a coil 200, wherein the stator core 100 is formed by laminating silicon steel sheets (or by pressing amorphous iron powder), the core slots 110 of the stator core 100 are formed by a semi-open slot type, and the core slots 110 have slot shoulders 120 on one side only, so that the core slots 110 form an asymmetric structure. In the present embodiment, the core slots 110 are disposed on the outer side of the stator core 100 for being disposed on the inner rotor permanent magnet motor.
As shown in fig. 4, the coil 200 is a half-formed coil 200, and the coil 200 is a flat copper wire. In this embodiment, the cross section of the flat copper wire is rectangular, and after the coil 200 is taken off, the coil 200 is attached to the wall of the core slot 110.
The coil 200 is fixed to the stator core 100 in a manner of a loose wire. Each of the coils 200 has a span of one stator tooth.
The coil 200 is wound around the core slot 110 of the stator core 100 and fixed in the core slot 110 by the slot wedge 130. In this embodiment, a groove 140 is formed on the other side of the core barrel 110 to cooperate with the slot wedge 130 for fixing. When the coil 200 is pulled down into the core slot 110, a gap is formed between the edge of the coil 200 positioned on one side and the slot shoulder 120, one end of the slot wedge 130 is inserted into the gap to fix the edge of the coil 200, the other suspended ceiling end of the slot wedge 130 is inserted into the groove 140, and the slot wedge 130 is fastened on the core slot 110 through the matching of the gap between the edge of the coil 200 and the slot shoulder 120 and the groove 140.
In addition, there is a gap between the coils 200 located on both sides of the slot wall of the core slot 110 to form ventilation ducts 150 passing through the stator core 100 in the axial direction, and the number of the ventilation ducts 150 is the same as that of the core slots 110.
Example 2:
as shown in fig. 5, the present embodiment further provides another high power density permanent magnet motor stator, and the main difference between the present embodiment and embodiment 1 is: in this embodiment, the core slot is disposed inside the stator core and configured on the outer rotor permanent magnet motor.
The rest of the structure and the features are the same as those of embodiment 1 and will not be described in detail here.
In addition, the invention also provides a coil inserting method, which is used for inserting the coil of the high-power-density permanent magnet motor stator in the embodiment 1 and the embodiment 2, and mainly comprises the following steps.
S1: when the first half-formed coil is off-line, the coil is close to the first iron core groove, the coil side is put into the groove from the side of the first iron core groove with the groove shoulder, and the other coil side is suspended in the air by stretching and is not put into the groove;
s2: when a second half-formed coil is off-line, the coil is close to a second iron core groove, the coil edge is lowered into the groove from one side of the second iron core groove with the groove shoulder, and then the other coil edge is lowered into the adjacent iron core groove across one stator tooth;
s3: repeating the step S2 for the third half-formed coil to the last half-formed coil to be off-line;
s4: finally, bending the suspended coil edge on the first half-formed coil and inserting the coil edge into the iron core slot positioned at the last to finish inserting the coil;
the groove shoulder is positioned on the left side or the right side of the iron core groove, and the coil inserting is carried out according to the sequence of successive right inserting or successive left inserting when the half-and-half formed coil is inserted.
In particular, the groove shoulder is located on the left side (or right side) of the core groove, and when half-formed coils are inserted, the coils are inserted in the sequence of rightward (or leftward) insertion.
Claims (9)
1. A high-power-density permanent magnet motor stator comprises a stator core and a coil, wherein an iron core groove of the stator core is a half-open groove type; the coil is a semi-formed coil and is fixed on the stator core in a scattered coil mode; each of the coils has a span of one stator tooth.
2. The high power density permanent magnet motor stator according to claim 1, wherein the notch of the core slot is provided with a slot wedge, and the other side of the core slot is provided with a groove for fixing the slot wedge by matching with the slot shoulder.
3. The high power density permanent magnet motor stator according to claim 1, wherein the coil is made of flat copper wires, and the flat copper wires are not solidified after being wound and formed by a winding former, so that the flat copper wires can be stretched up and down.
4. The high power density permanent magnet motor stator according to claim 3, wherein the cross section of the flat copper wire is rectangular, and after the coil is taken off the line, the coil is attached to the wall of the iron core slot.
5. The high power density permanent magnet motor stator according to claim 1, wherein there is a gap between the coils on both sides of the slot wall of the core slot to form an air duct passing through the stator core in the axial direction; the number of the ventilation channels is the same as that of the iron core slots.
6. The high power density pm machine stator as recited in claim 1, wherein said core slots are provided on the outside of the stator core for placement on the inner rotor pm machine.
7. The high power density pm machine stator of claim 1 wherein said core slots are provided on the inside of the stator core for disposition on the outer rotor pm machine.
8. The high power density permanent magnet motor stator according to claim 1, wherein the stator core is formed by silicon steel sheet lamination or amorphous iron powder pressing.
9. A coil winding method for winding a coil of a high power density permanent magnet motor stator according to any one of claims 1 to 8, comprising,
s1: when the first half-formed coil is off-line, the coil is close to the first iron core groove, the coil side is put into the groove from the side of the first iron core groove with the groove shoulder, and the other coil side is suspended in the air by stretching and is not put into the groove;
s2: when a second half-formed coil is off-line, the coil is close to a second iron core groove, the coil edge is lowered into the groove from one side of the second iron core groove with the groove shoulder, and then the other coil edge is lowered into the adjacent iron core groove across one stator tooth;
s3: repeating the step S2 for the third half-formed coil to the last half-formed coil to be off-line;
s4: finally, bending the suspended coil edge on the first half-formed coil and inserting the coil edge into the iron core slot positioned at the last to finish inserting the coil;
the groove shoulder is positioned on the left side or the right side of the iron core groove, and the coil inserting is carried out according to the sequence of successive right inserting or successive left inserting when the half-and-half formed coil is inserted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011400413.0A CN112583149A (en) | 2020-12-02 | 2020-12-02 | High-power-density permanent magnet motor stator and coil inserting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011400413.0A CN112583149A (en) | 2020-12-02 | 2020-12-02 | High-power-density permanent magnet motor stator and coil inserting method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112583149A true CN112583149A (en) | 2021-03-30 |
Family
ID=75127963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011400413.0A Pending CN112583149A (en) | 2020-12-02 | 2020-12-02 | High-power-density permanent magnet motor stator and coil inserting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112583149A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113644765A (en) * | 2021-07-20 | 2021-11-12 | 苏州恒科机电科技有限公司 | Air-cooled permanent magnet synchronous motor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003070199A (en) * | 2001-08-27 | 2003-03-07 | Hitachi Ltd | Motor or generator and method of manufacturing the same |
| EP2136455A1 (en) * | 2008-06-19 | 2009-12-23 | Abb Research Ltd. | An electric motor provided with a cooling arrangement |
| CN101860096A (en) * | 2010-05-17 | 2010-10-13 | 无锡市中达电机有限公司 | Stator core with winding for medium-sized low-voltage variable-frequency motor |
| CN104065186A (en) * | 2014-06-13 | 2014-09-24 | 新疆金风科技股份有限公司 | Stator used for motor, motor and ventilation cooling method of motor |
| CN207117343U (en) * | 2017-08-22 | 2018-03-16 | 锦州富山密封科技有限公司 | New-energy automobile is molded winding with permasyn morot |
| CN208589819U (en) * | 2018-01-03 | 2019-03-08 | 广东美芝制冷设备有限公司 | Magneto and compressor |
| CN213879396U (en) * | 2020-12-02 | 2021-08-03 | 卧龙电气驱动集团股份有限公司 | A high power density permanent magnet motor stator |
-
2020
- 2020-12-02 CN CN202011400413.0A patent/CN112583149A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003070199A (en) * | 2001-08-27 | 2003-03-07 | Hitachi Ltd | Motor or generator and method of manufacturing the same |
| EP2136455A1 (en) * | 2008-06-19 | 2009-12-23 | Abb Research Ltd. | An electric motor provided with a cooling arrangement |
| CN101860096A (en) * | 2010-05-17 | 2010-10-13 | 无锡市中达电机有限公司 | Stator core with winding for medium-sized low-voltage variable-frequency motor |
| CN104065186A (en) * | 2014-06-13 | 2014-09-24 | 新疆金风科技股份有限公司 | Stator used for motor, motor and ventilation cooling method of motor |
| CN207117343U (en) * | 2017-08-22 | 2018-03-16 | 锦州富山密封科技有限公司 | New-energy automobile is molded winding with permasyn morot |
| CN208589819U (en) * | 2018-01-03 | 2019-03-08 | 广东美芝制冷设备有限公司 | Magneto and compressor |
| CN213879396U (en) * | 2020-12-02 | 2021-08-03 | 卧龙电气驱动集团股份有限公司 | A high power density permanent magnet motor stator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113644765A (en) * | 2021-07-20 | 2021-11-12 | 苏州恒科机电科技有限公司 | Air-cooled permanent magnet synchronous motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11245309B2 (en) | Liquid cooled stator for high efficiency machine | |
| CN109617319B (en) | An oil cooling structure in the slot of a flat wire motor | |
| EP2136455A1 (en) | An electric motor provided with a cooling arrangement | |
| CN109450128B (en) | Motor stator and oil-cooled motor with same | |
| US20160276888A1 (en) | Windings for electrical machines | |
| CN101982930A (en) | Efficient three-phase slot-free permanent magnet motor | |
| CN112087072A (en) | Axial sectional type motor stator assembly | |
| CN117424363A (en) | Stator assembly, motor and electric drive assembly | |
| CN213879396U (en) | A high power density permanent magnet motor stator | |
| CN116961291A (en) | Stator punching structure, high-speed motor stator and high-speed motor | |
| CN112583149A (en) | High-power-density permanent magnet motor stator and coil inserting method thereof | |
| CN209282948U (en) | A kind of stator core, motor stator and motor | |
| CN114448131A (en) | A stator assembly and flat wire motor | |
| CN220421523U (en) | Stator punching structure, high-speed motor stator and high-speed motor | |
| CN211701634U (en) | A composite permanent magnet synchronous motor stator | |
| CN221177515U (en) | Linear motor mover structure and linear motor | |
| CN113497495A (en) | Stator core for high-speed permanent magnet motor, motor and vehicle | |
| CN212627350U (en) | A soft magnetic composite stator motor | |
| CN215528729U (en) | Spiral warped sheet type multi-turn winding cooling device | |
| CN114257009B (en) | Magnetic pole coil, rotor and salient pole motor with internal cooling structure | |
| CN111585363B (en) | A soft magnetic composite material stator motor and cooling method thereof | |
| CN111313578B (en) | Stator module of a hybrid excitation generator | |
| CN116667558A (en) | Stator and motor | |
| CN107086681A (en) | A motor stator with outer winding concentrated winding | |
| CN213305069U (en) | A Novel Stator Structure for Electric Vehicle Drive Motors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |