CN111463917A - Composite permanent magnet synchronous motor stator - Google Patents
Composite permanent magnet synchronous motor stator Download PDFInfo
- Publication number
- CN111463917A CN111463917A CN202010374001.8A CN202010374001A CN111463917A CN 111463917 A CN111463917 A CN 111463917A CN 202010374001 A CN202010374001 A CN 202010374001A CN 111463917 A CN111463917 A CN 111463917A
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- China
- Prior art keywords
- stator
- winding
- permanent magnet
- magnet synchronous
- synchronous motor
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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
- H02K1/12—Stationary parts of the magnetic circuit
-
- 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
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/48—Fastening of windings on the stator or rotor structure in slots
- H02K3/487—Slot-closing devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/48—Fastening of windings on the stator or rotor structure in slots
- H02K3/487—Slot-closing devices
- H02K3/493—Slot-closing devices magnetic
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a composite permanent magnet synchronous motor stator which comprises a stator core and a stator winding, wherein the stator core comprises a stator yoke and stator teeth which are independent structures, the stator yoke is positioned on the outer side of the stator teeth, stator slots are formed in the periphery of the stator teeth, dovetail slots are formed in the notches of the stator slots and matched with dovetail protrusions arranged on the inner surface of the stator yoke, and the stator winding is embedded into the stator slots from the notches of the stator slots; the motor stator adopts a stator tooth periphery slotting structure, and through the matching of the dovetails and the dovetails, the traditional slot wedge structure is omitted, the effect equivalent to a stator without a slot opening can be obtained, the stator slot opening magnetic leakage effect is eliminated, the air gap magnetic density waveform is improved, and the problem of the cogging torque of the permanent magnet synchronous motor is effectively solved; the coil inserting difficulty of the motor stator winding is greatly reduced by the embedded coil inserting mode of the stator winding.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a composite permanent magnet synchronous motor stator.
Background
The high-speed permanent magnet synchronous motor is used as a core driving device, is widely applied to the traffic fields of electric automobiles, electric locomotives and the like, the industrial fields of flywheel energy storage, centrifugal compressors and the like and the military fields of aircraft carriers, airplane energy systems and the like, and has become an object of competitive attention in various industries. With the progress of the technology, each application field puts more severe requirements on small volume, high power density, high efficiency, high rotating speed and the like of the high-speed permanent magnet synchronous motor.
The existing high-speed permanent magnet synchronous motor usually adopts a stator core inner surface slot design, and air gap flux density waveform distortion is easily caused due to the alternative distribution of tooth slots, so that a serious tooth slot torque effect is brought, output torque pulsation and motor noise are caused, and the performance and the precision of a system are influenced. In addition, the stator winding of the high-speed permanent magnet synchronous motor adopts an embedded or threading type coil inserting mode, so that the process difficulty of the motor is greatly increased.
Disclosure of Invention
The invention aims to provide a composite permanent magnet synchronous motor stator to solve the problem of serious cogging torque effect of the existing motor.
The technical scheme for solving the technical problems is as follows: a composite permanent magnet synchronous motor stator comprises a stator core and a stator winding, wherein the stator core comprises a stator yoke and stator teeth which are independent from each other, and the stator yoke is positioned on the outer side of the stator teeth;
stator slot has been seted up to stator tooth periphery, and stator slot's notch department is provided with the dovetail groove, and the dovetail groove matches with the dovetail arch that sets up at stator yoke internal surface, and stator winding is by the notch overcoat embedding stator slot of stator slot.
The beneficial effects of adopting the above technical scheme are: the motor stator is simple in structure, the material selection range can be enlarged through the stator teeth and the stator yoke which are independent in structure, and the motor cost is saved; the coil inserting difficulty of the motor stator winding is greatly reduced by the embedded coil inserting mode of the stator winding; after the stator is fixed in the winding sleeve embedded stator slot, the stator yoke and the stator teeth form an integral stator core through the embedded fit between the dovetail slot and the dovetail protrusion, the traditional slot wedge structure is omitted, the effect equivalent to a stator without a slot opening is obtained, the magnetic leakage effect of a stator slot opening is eliminated, the air gap magnetic density waveform is improved, and the problem of serious cogging torque of the permanent magnet synchronous motor is effectively solved.
Furthermore, the stator winding comprises an upper layer winding and a lower layer winding, an interlayer insulating layer is arranged between the upper layer winding and the lower layer winding, and the upper layer winding and the lower layer winding are respectively embedded into the stator slot from the notch outer sleeve of the stator tooth.
The beneficial effects of adopting the above technical scheme are: the structural performance of the whole stator winding is improved and the service life of the motor is prolonged through the layered structure design of the winding; through setting up the interlayer insulation layer, improve insulating effect, prevent to puncture, avoid the interact between upper winding and the lower floor's winding simultaneously.
Furthermore, the outer wall of the upper layer winding and the periphery of the lower layer winding are respectively provided with a main insulating layer.
The beneficial effects of adopting the above technical scheme are: the outer layer insulation protection of the stator winding is formed through the main insulation layer, the insulation effect is effectively improved, and the running performance is improved.
Further, stator pressing plates are respectively arranged at two axial ends of the stator core.
The beneficial effects of adopting the above technical scheme are: the stator core punching sheet is reliably fixed through the stator pressing plate, and meanwhile, the warping of the side-section stator core punching sheet is effectively prevented.
Furthermore, gaps are uniformly formed in the circumference of the stator pressing plate, and the number of the gaps of the stator pressing plate is the same as the number of teeth of the stator teeth.
The beneficial effects of adopting the above technical scheme are: the gap of the stator pressing plate is arranged, so that the eddy effect of the stator pressing plate is effectively inhibited.
Further, stator tooth positioning ribs are arranged on the inner surfaces of the stator teeth.
The beneficial effects of adopting the above technical scheme are: the stator teeth are stably fixed by the stator teeth positioning ribs, so that the reliability of stator teeth press mounting is ensured, and the structural performance of a stator core is improved.
Further, the outer surface of the stator yoke is provided with stator yoke positioning ribs.
The beneficial effects of adopting the above technical scheme are: the stator yoke positioning ribs effectively guarantee the reliability of stator yoke press mounting and improve the structural performance of the stator core.
Further, the number of dovetail protrusions is equal to the number of stator slots.
The invention has the following beneficial effects:
(1) the motor stator provided by the invention has a simple structure, and adopts a separate independent structure of the stator teeth and the stator yoke, so that different iron core materials can be selected for the stator teeth and the stator yoke, and the motor cost is saved.
(2) The motor stator provided by the invention adopts a stator tooth periphery slotting structure, and through the matching of the dovetails and the dove tail slots, the traditional slot wedge structure is omitted, the effect equivalent to a stator without a slot opening can be obtained, the stator slot opening magnetic leakage effect is eliminated, the air gap magnetic density waveform is improved, and the problem of the cogging torque of the permanent magnet synchronous motor is solved.
(3) The motor stator provided by the invention adopts a stator winding external embedded type coil inserting mode, so that the coil inserting difficulty of the motor stator winding is greatly reduced.
(4) The stator pressing plates are arranged at the two axial ends of the stator core of the motor stator, so that not only are the stator core stamped sheets fixed, but also the stator core stamped sheets at the side sections are prevented from warping; the stator pressure plate circumferential slots effectively inhibit the eddy current effect of the pressure plate.
Drawings
FIG. 1 is a circumferential cross-sectional view of a composite stator winding PMSM stator of the present invention;
FIG. 2 is an axial cross-sectional view of a composite stator winding PMSM stator of the present invention;
FIG. 3 is a cross-sectional view of the stator teeth of the composite stator winding PMSM stator of the present invention in the circumferential direction;
FIG. 4 is a circumferential cross-sectional view of a stator yoke of a composite stator winding PMSM stator of the present invention;
FIG. 5 is a cross-sectional view of the inner circumference of the stator slot of the composite stator winding permanent magnet synchronous motor stator of the present invention;
FIG. 6 is a circumferential cross-sectional view of a stator pressure plate of the composite stator winding PMSM stator of the present invention;
the reference numerals shown in fig. 1 to 6 are respectively expressed as: 1-stator core, 2-stator winding, 3-stator yoke, 4-stator tooth, 5-dovetail groove, 6-dovetail protrusion, 20-upper winding, 21-lower winding, 22-interlayer insulating layer, 23-main insulating layer, 7-stator pressing plate, 8-gap, 9-stator tooth positioning rib and 10-stator yoke positioning rib.
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.
As shown in fig. 1 to 4, a composite permanent magnet synchronous motor stator includes a stator core 1 and a stator winding 2, the stator core 1 includes a stator yoke 3 and a stator tooth 4 which are independent from each other, and the stator yoke 3 is located outside the stator tooth 4. The motor stator is simple in structure, the stator teeth 4 and the stator yoke 3 are of independent structures, the magnetic flux density of the stator yoke is smaller than that of the stator teeth, and when materials are selected, different iron core materials can be selected for the stator yoke and the stator teeth, so that the motor cost is reduced.
Stator slot has been seted up to 4 peripheries of stator tooth, and stator slot's notch department is provided with dovetail slot 5, and dovetail slot 5 cooperatees with the protruding 6 of dovetail that set up at 3 internal surfaces of stator yoke, and stator winding 2 is by the notch overcoat embedding stator slot of stator slot in, the protruding 6 quantity of dovetail equal the quantity of stator slot.
As shown in fig. 5, the stator winding 2 includes an upper winding 20 and a lower winding 21, an interlayer insulating layer 22 is disposed between the upper winding 20 and the lower winding 21, and the upper winding 20 and the lower winding 21 are respectively embedded in the stator slots by the notch of the stator teeth 4. Through the layered structure design of the winding, the overall structural performance of the stator winding 2 is improved, and the service life of the motor is prolonged. By providing the interlayer insulating layer 22, the insulating effect is improved, the breakdown is prevented, and the mutual influence between the upper winding 20 and the lower winding 21 is avoided.
The outer wall of the upper layer winding 20 and the periphery of the lower layer winding 21 are respectively provided with a main insulating layer 23. The outer layer insulation protection of the stator winding 2 is formed through the main insulation layer 23, and a double insulation structure is formed with the interlayer insulation layer 22, so that the insulation effect is effectively improved, and the running performance is improved.
As shown in fig. 6, stator pressing plates 7 are provided at both axial ends of the stator core 1, respectively. The stator core punching sheet is guaranteed to be reliably fixed through the stator pressing plate 7, and meanwhile, the warping of the side-section stator core 1 punching sheet is effectively prevented.
The circumference of the stator pressing plate 7 is uniformly provided with gaps 8, and the number of the gaps 8 of the stator pressing plate 7 is the same as the number of teeth of the stator teeth 4. By the arrangement of the gap 8 of the stator pressing plate 7, the eddy current effect of the stator pressing plate 7 is effectively inhibited.
Stator tooth positioning ribs 9 are arranged on the inner surface of the stator teeth 4. The reliability of the press mounting of the stator teeth 4 is ensured by the stable fixing action of the stator tooth positioning ribs 9, and the structural performance of the stator core 1 is improved.
The outer surface of the stator yoke 3 is provided with stator yoke positioning ribs 10. The stator yoke positioning ribs 10 effectively ensure the reliability of the press mounting of the stator yoke 3 and improve the structural performance of the stator core 1.
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. The composite permanent magnet synchronous motor stator is characterized by comprising a stator core (1) and a stator winding (2), wherein the stator core (1) comprises a stator yoke (3) and stator teeth (4) which are mutually independent structures, and the stator yoke (3) is positioned on the outer side of the stator teeth (4);
stator slot has been seted up to stator tooth (4) periphery, stator slot's notch department is provided with dovetail groove (5), just dovetail groove (5) are in with the setting the protruding (6) of dovetail of stator yoke (3) internal surface cooperate, stator winding (2) by the notch overcoat embedding stator slot of stator slot is interior.
2. The composite permanent magnet synchronous motor stator according to claim 1, wherein the stator winding (2) comprises an upper layer winding (20) and a lower layer winding (21), an interlayer insulating layer (22) is arranged between the upper layer winding (20) and the lower layer winding (21), and the upper layer winding (20) and the lower layer winding (21) are respectively embedded into stator slots by notch jackets of the stator teeth (4).
3. The composite permanent magnet synchronous motor stator according to claim 2, wherein the outer wall of the upper layer winding (20) and the periphery of the lower layer winding (21) are respectively provided with a main insulating layer (23).
4. The composite permanent magnet synchronous motor stator according to claim 1, wherein stator pressing plates (7) are respectively arranged at two axial ends of the stator core (1).
5. The composite permanent magnet synchronous motor stator according to claim 4, wherein gaps (8) are uniformly arranged on the circumference of the stator pressing plate (7), and the number of the gaps (8) of the stator pressing plate (7) is the same as the number of the stator teeth (4).
6. The stator of a hybrid permanent magnet synchronous motor according to any one of claims 1 to 5, wherein the inner surface of the stator teeth (4) is provided with stator teeth positioning ribs (9).
7. The composite PMSM stator according to claim 6, wherein the stator yoke (3) is provided with stator yoke positioning ribs (10) on its outer surface.
8. The composite PMSM stator according to claim 6, wherein the number of dovetail protrusions (6) is equal to the number of stator slots.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010374001.8A CN111463917A (en) | 2020-05-06 | 2020-05-06 | Composite permanent magnet synchronous motor stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010374001.8A CN111463917A (en) | 2020-05-06 | 2020-05-06 | Composite permanent magnet synchronous motor stator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111463917A true CN111463917A (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010374001.8A Pending CN111463917A (en) | 2020-05-06 | 2020-05-06 | Composite permanent magnet synchronous motor stator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111463917A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115528827A (en) * | 2022-06-30 | 2022-12-27 | 哈尔滨理工大学 | Permanent magnet driving motor based on double U-shaped stators and double-side embedded variable-layer-number windings |
| WO2023148512A1 (en) * | 2022-02-07 | 2023-08-10 | Hispeed Ltd | Stator for an electric machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202218137U (en) * | 2011-08-10 | 2012-05-09 | 徐州工业职业技术学院 | Closed slot permanent magnet synchronous motor with strengthened structure |
| US20150207367A1 (en) * | 2012-06-29 | 2015-07-23 | Whirlpool S.A. | Laminar segment for electric motor segmented stator |
| CN107959361A (en) * | 2016-10-18 | 2018-04-24 | 中国科学院宁波材料技术与工程研究所 | The stator of permanent magnet torque motor and the permanent magnet torque motor with high torque density |
| CN107979258A (en) * | 2018-01-12 | 2018-05-01 | 中国计量大学 | A kind of permanent-magnet brushless DC electric machine closed slot stator and its coil-inserting method |
| CN110247489A (en) * | 2019-07-22 | 2019-09-17 | 哈尔滨理工大学 | A kind of high-speed permanent magnetic synchronous motor with stator major insulation water channel cooling system |
-
2020
- 2020-05-06 CN CN202010374001.8A patent/CN111463917A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202218137U (en) * | 2011-08-10 | 2012-05-09 | 徐州工业职业技术学院 | Closed slot permanent magnet synchronous motor with strengthened structure |
| US20150207367A1 (en) * | 2012-06-29 | 2015-07-23 | Whirlpool S.A. | Laminar segment for electric motor segmented stator |
| CN107959361A (en) * | 2016-10-18 | 2018-04-24 | 中国科学院宁波材料技术与工程研究所 | The stator of permanent magnet torque motor and the permanent magnet torque motor with high torque density |
| CN107979258A (en) * | 2018-01-12 | 2018-05-01 | 中国计量大学 | A kind of permanent-magnet brushless DC electric machine closed slot stator and its coil-inserting method |
| CN110247489A (en) * | 2019-07-22 | 2019-09-17 | 哈尔滨理工大学 | A kind of high-speed permanent magnetic synchronous motor with stator major insulation water channel cooling system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023148512A1 (en) * | 2022-02-07 | 2023-08-10 | Hispeed Ltd | Stator for an electric machine |
| CN115528827A (en) * | 2022-06-30 | 2022-12-27 | 哈尔滨理工大学 | Permanent magnet driving motor based on double U-shaped stators and double-side embedded variable-layer-number windings |
| CN115528827B (en) * | 2022-06-30 | 2023-05-05 | 哈尔滨理工大学 | Permanent magnet driving motor based on double-U-shaped stator and double-side embedded variable layer number windings |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200728 |