CN106712335B - Anti-magnetic leakage low-loss driving motor design - Google Patents
Anti-magnetic leakage low-loss driving motor design Download PDFInfo
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- CN106712335B CN106712335B CN201610408023.5A CN201610408023A CN106712335B CN 106712335 B CN106712335 B CN 106712335B CN 201610408023 A CN201610408023 A CN 201610408023A CN 106712335 B CN106712335 B CN 106712335B
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- rotor
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- silicon steel
- rotor core
- oriented silicon
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- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 52
- 239000011159 matrix material Substances 0.000 claims abstract description 44
- 238000003475 lamination Methods 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 230000004907 flux Effects 0.000 claims abstract description 12
- 238000004804 winding Methods 0.000 claims abstract description 7
- 238000005096 rolling process Methods 0.000 claims description 9
- 230000035699 permeability Effects 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000696 magnetic material Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims 4
- 238000004080 punching Methods 0.000 claims 2
- 238000000034 method Methods 0.000 claims 1
- 230000010287 polarization Effects 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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
- H02K1/17—Stator cores with permanent magnets
-
- 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
- H02K1/22—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]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides an anti-magnetic leakage low-loss driving motor, which comprises a stator and a rotor; the stator comprises a stator core and a stator winding, and the rotor comprises a rotor core and rotor magnetic steel; the stator core comprises an annular stator core yoke ring matrix composed of non-oriented silicon steel laminations and a plurality of stator core tooth inserts composed of oriented silicon steel laminations. The rotor core comprises an annular rotor core matrix composed of non-oriented silicon steel laminations and a plurality of rotor core inserts composed of oriented silicon steel laminations. According to the invention, the oriented silicon steel lamination with higher magnetic conductivity is used for replacing the non-oriented silicon steel lamination in the polarization direction of the rotor, and the stator pole shoe also uses the oriented silicon steel lamination. Therefore, the motor still has higher saturation magnetic flux density under the condition of larger current, reduces loss and improves the efficiency of the driving motor, thereby realizing the high-torque low-loss driving motor.
Description
Technical Field
The invention relates to a motor, in particular to an anti-magnetic leakage low-loss driving motor.
Background
At present, the driving motor is designed and manufactured by cold-rolled non-oriented silicon steel, but the technical performance of the new energy automobile is continuously developed and improved. The driving motor of the new energy automobile has higher requirements, and the driving motor needs high power density, high torque, high power, high rotating speed and low loss. In order to meet the requirements, the driving motor has to be bigger, heavier, more expensive and more high in loss, which all violates the long-term development targets of environmental protection, energy conservation and emission reduction. In order to meet the high requirement of the driving motor, the prior art is adopted, so that the volume and weight of the motor are increased, the cost is increased, and the loss is increased.
Disclosure of Invention
The invention aims to solve the problems and provide a novel magnetic leakage resistant low-loss driving motor.
In order to achieve the above purpose, the present invention adopts the following technical scheme: an anti-magnetic leakage low-loss driving motor comprises a stator and a rotor; the stator comprises a stator core and a stator winding, and the rotor comprises a rotor core and rotor magnetic steel;
the stator core comprises an annular stator core matrix formed by stator non-oriented silicon steel laminations and a plurality of stator core inserts formed by stator oriented silicon steel laminations, the plurality of stator core inserts are uniformly connected with the inner cutter of the stator core matrix at intervals, and a plurality of stator windings respectively pass through between every two adjacent stator core inserts;
the non-oriented silicon steel used for the annular stator yoke part annular matrix adopts a single-die stamping mode, a plurality of single sheets with consistent shapes are stamped according to a yoke part design drawing, and after the single sheets are laminated, the single sheets are splice welded on the excircle section of the annular matrix in a welding mode to form an annular cylinder. The non-oriented silicon steel is an isotropic soft magnetic material with magnetic permeability, the silicon content is between 0.8 and 3.0 percent, and the saturation magnetic flux density is between 1.66T and 1.73T. When the motor is operated, the magnetic flux density of the stator yoke is generally lower than that of the teeth, and the electromagnetic performance of the motor stator is mainly determined by the teeth. Therefore, the yoke portion can be manufactured using non-oriented silicon steel which is relatively low in processing difficulty.
The stator tooth part is composed of a plurality of tooth blocks with the same number as the yoke part, each tooth block uses oriented silicon steel, each piece of oriented silicon steel adopts a single-die stamping mode, a plurality of single pieces with consistent shapes are stamped according to a tooth part design drawing, and then the single pieces are bonded in a self-bonding mode to form the oriented silicon steel tooth blocks with consistent shapes along the rolling direction of magnetic force lines. The oriented silicon steel is an anisotropic soft magnetic material with magnetic permeability, the silicon content is more than 3.0%, the saturation magnetic flux density along the rolling direction and the transverse direction of the oriented silicon steel is sequentially reduced, the saturation magnetic flux density along the rolling direction is 1.84T-1.94T, and the saturation magnetic flux density along the transverse direction is 1.10T-1.20T. When the motor runs, the electromagnetic performance of the motor stator is mainly determined by the tooth part, so that the tooth part can be designed and manufactured by using oriented silicon steel along the rolling direction as much as possible, the saturation magnetic flux density of the tooth part is increased, the iron core loss of the tooth part is reduced, and the occurrence of oriented silicon steel along the transverse direction in the tooth part is avoided as much as possible.
The non-oriented silicon steel used for the annular rotor matrix adopts a single-die stamping mode, a plurality of single sheets with consistent shapes are stamped according to a matrix design drawing, and after the single sheets are laminated, the single sheets are splice welded on the inner circle of the annular matrix, namely, the section contacted with the shaft, to form an annular cylinder.
The rotor core insert consists of a plurality of tooth blocks with the same number as the rotor annular matrix, each tooth block uses oriented silicon steel, each piece of oriented silicon steel adopts a single-die stamping mode, a plurality of single pieces with the same shape are stamped according to a tooth part design drawing, and then the single pieces are bonded in a self-bonding mode to form the oriented silicon steel tooth blocks with the same shape along the rolling direction of magnetic force lines.
The rotor core comprises an annular rotor core matrix composed of rotor non-oriented silicon steel laminations and a plurality of rotor core inserts composed of rotor oriented silicon steel laminations, wherein the rotor core inserts are uniformly and alternately embedded in the outer side of the rotor core matrix and form a circular outer surface together with the rotor core matrix, and the rotor magnetic steels are respectively arranged between the rotor core matrix and each rotor core insert.
The inner side of the annular stator core matrix is uniformly provided with a plurality of axial dovetail grooves at intervals, each stator core insert is provided with a corresponding dovetail, and each stator core insert is respectively connected with the annular stator core matrix in a joggle joint manner.
The annular rotor core matrix is internally provided with a shaft hole for installing a rotating shaft, a hexagonal star-shaped structure is formed outside the annular rotor core matrix, and each rotor core insert is respectively embedded between two adjacent star angles.
The two sides of the top end of each star angle of the annular rotor core matrix are respectively provided with an outward turning clamping angle, the two sides of each rotor core insert are respectively provided with corresponding outward turning angles, and each rotor core insert is respectively connected with the annular rotor core matrix in an embedded mode.
And the inner sides of all star angles of the annular rotor core matrix are respectively provided with rotor lightening holes which are axially communicated.
The rotor lightening holes are triangular.
The outer side of the rotor core insert is arc-shaped, and the inner side of the rotor core insert is obtuse; each rotor magnetic steel is respectively arranged between two sides of each obtuse angle and the annular rotor core base body.
And the two ends of each rotor magnetic steel are respectively provided with a magnetism isolating groove.
According to the anti-magnetic leakage low-loss driving motor, the oriented silicon steel lamination with higher magnetic conductivity is used for replacing the non-oriented silicon steel lamination in the rotor polarization direction, and meanwhile, the oriented silicon steel lamination is also used for the stator core insert. Therefore, the motor still has higher saturation magnetic flux density under the condition of larger current, reduces loss and improves the efficiency of the driving motor, thereby realizing the high-torque low-loss driving motor.
In the invention, the combined application of the oriented and unoriented silicon steel sheets enables the stator and the rotor to have larger saturation magnetic flux density, so that the unit current of the motor is further improved by utilizing the reluctance torque generated by the stator and the rotor. The permanent magnet exists in the straight-axis magnetic circuit, so that the equivalent air gap is larger, and the influence of the straight-axis current is insensitive; and the equivalent air gap in the quadrature magnetic circuit is small, so that the effect of the quadrature current is larger, the saturation of the quadrature magnetic circuit is severe along with the increase of the quadrature current, and the quadrature inductance is reduced sharply. This results in a motor with reduced saliency at low speeds and high loads than when unloaded. Saturation of the quadrature magnetic circuit is mainly reflected in saturation of the stator teeth, yoke and rotor pole pieces. For stator saturation, the stator teeth and the yokes are made of oriented silicon steel, and the areas of the teeth and the yokes are reasonably distributed, so that the stator saturation can be effectively relieved. The pole shoes of the rotor are saturated, and the pole shoes can be rolled along the tangential direction, so that although the magnetic leakage of the rotor is increased, the magnetic permeability of a quadrature axis magnetic circuit is obviously increased, and the motor can be ensured to still have higher salient pole ratio under the condition of larger current; the anti-magnetic leakage low-loss motor provided by the invention can realize the integral manufacture of a system by utilizing the prior art, and has strong assembly realizability.
Drawings
Fig. 1 is a schematic view of a stator-rotor cross-sectional structure of the present invention.
Fig. 2 is a partial schematic cross-sectional view of a rotor of the present invention.
Fig. 3 is a partial schematic cross-sectional view of a stator of the present invention.
Fig. 4 is a partial schematic view of a stator-rotor cross section of the present invention.
Fig. 5 is a schematic view of the stator and rotor structure of the present invention.
Fig. 6 is a schematic view of the stator structure of the present invention.
Fig. 7 is a schematic view of the rotor structure of the present invention.
Fig. 8 is a schematic view of a stator-rotor partial lamination structure of the present invention.
Fig. 9 is a schematic view of a partial structure of a stator of the present invention.
Fig. 10 is a schematic view of a partial structure of a rotor of the present invention.
Fig. 11 is a schematic view of a stator tooth punch of the present invention.
Detailed Description
Referring to fig. 1, in combination with fig. 2 to 11, the anti-leakage low-loss driving motor of the present invention includes a stator and a rotor; the stator comprises a stator core and stator windings 10, and the rotor comprises a rotor core and rotor magnet steel 1.
The stator core comprises an annular stator core matrix 7 formed by stator non-oriented silicon steel laminations and a plurality of stator core inserts 8 formed by stator oriented silicon steel laminations, wherein the plurality of stator core inserts are uniformly connected with the inner cutter of the stator core matrix at intervals, and a plurality of stator windings 10 respectively pass through between every two adjacent stator core inserts.
The rotor core comprises an annular rotor core matrix 4 formed by rotor non-oriented silicon steel laminations and a plurality of rotor core inserts 2 formed by rotor oriented silicon steel laminations, wherein the rotor core inserts are uniformly and alternately embedded on the outer side of the rotor core matrix and form a circular outer surface together with the rotor core matrix, and the rotor magnetic steels are respectively arranged between the rotor core matrix and each rotor core insert.
A plurality of axial dovetail grooves 9 are uniformly arranged on the inner side of the annular stator core matrix 7 at intervals, each stator core insert is provided with a corresponding dovetail, and each stator core insert is respectively connected with the annular stator core matrix in a joggle joint manner.
The annular rotor core base body 4 is internally provided with a shaft hole for installing a rotating shaft, a hexagonal star-shaped structure is formed outside, and each rotor core insert 2 is respectively embedded between two adjacent star angles.
The two sides of the star-shaped top end of the annular rotor core matrix 4 are respectively provided with an outward turned clamping angle 3, the two sides of each rotor core insert are respectively provided with a corresponding outward turned angle, and each rotor core insert is respectively connected with the annular rotor core matrix in an embedded mode.
Rotor lightening holes 5 which are penetrated in the axial direction are respectively arranged on the inner sides of the star angles of the annular rotor core base body 4, and the rotor lightening holes are triangular.
The outer side of the rotor core insert is arc-shaped, and the inner side of the rotor core insert is obtuse-angle-shaped; each rotor magnetic steel is respectively arranged between two sides of each obtuse angle and the annular rotor core base body.
And two ends of each rotor magnetic steel are respectively provided with a magnetism isolating slot 6.
By adopting the anti-magnetic leakage low-loss driving motor, the iron loss of the oriented steel belt in the rolling direction is only 1/3 of that of the transverse direction, and the magnetic conductivity ratio is 6:1, the core loss is about 1/2 of that of the hot rolled strip, and the magnetic permeability is 2.5 times that of the hot rolled strip. When the driving motor is designed, the oriented silicon steel lamination with higher magnetic conductivity is used for replacing the non-oriented silicon steel lamination in the rotor polarization direction, and meanwhile, the stator pole shoe also uses the oriented silicon steel lamination. Therefore, the motor has higher salient pole ratio under the condition of larger current, reduces loss and improves the efficiency of the driving motor.
Claims (7)
1. An anti-magnetic leakage low-loss driving motor comprises a stator and a rotor; the stator comprises a stator core and a stator winding, and the rotor comprises a rotor core and rotor magnetic steel; the method is characterized in that:
the stator core comprises an annular stator core yoke base body formed by stator non-oriented silicon steel laminations and a plurality of stator core inserts formed by stator oriented silicon steel laminations, wherein the plurality of stator core inserts are uniformly connected to the inner side of the stator core yoke annular base body at intervals, and a plurality of stator windings respectively pass through between every two adjacent stator core inserts; the rotor core comprises an annular rotor core matrix composed of rotor non-oriented silicon steel laminations and a plurality of rotor core inserts composed of rotor oriented silicon steel laminations, wherein the rotor core inserts are uniformly and alternately embedded on the outer side of the rotor core matrix and form a circular outer surface together with the rotor core matrix, and the rotor magnetic steels are respectively arranged between the rotor core matrix and each rotor core insert;
the non-oriented silicon steel lamination is made of isotropic soft magnetic material with magnetic permeability, the silicon content is between 0.8 and 3.0 percent, and the saturation magnetic flux density is between 1.66 and 1.73T;
the oriented silicon steel lamination is made of anisotropic soft magnetic material with magnetic permeability, the silicon content is more than 3.0%, the saturation magnetic flux density along the rolling direction is between 1.84T and 1.94T, and the saturation magnetic flux density along the transverse direction is between 1.10T and 1.20T;
the inner side of the annular stator core yoke substrate is uniformly provided with a plurality of axial dovetail grooves at intervals, each stator core insert is provided with a corresponding dovetail, and each stator core insert is respectively connected with the annular stator core yoke substrate in a joggle joint manner;
the annular rotor core matrix is internally provided with a shaft hole for installing a rotating shaft, a hexagonal star-shaped structure is formed outside the annular rotor core matrix, and each rotor core insert is respectively embedded between two adjacent star angles;
the outer side of the rotor core insert is arc-shaped, and the inner side of the rotor core insert is obtuse; each rotor magnetic steel is respectively arranged between two sides of each obtuse angle and the annular rotor core matrix;
the two sides of the star-shaped top end of the annular rotor core matrix are respectively provided with an outward-turned clamping angle, the two sides of each rotor core insert are respectively provided with a corresponding outward-turned sharp angle, and each rotor core insert is respectively connected with the annular rotor core matrix in an embedded manner;
and the two ends of each rotor magnetic steel are respectively provided with a magnetism isolating groove.
2. The leakage-resistant low-loss driving motor according to claim 1, wherein: the non-oriented silicon steel used for the yoke substrate of the annular stator core adopts a single-die stamping mode, a plurality of single sheets with consistent shapes are stamped according to a yoke design drawing, and the single sheets are spliced and welded on the excircle section of the annular substrate in a welding mode to form an annular cylinder after being laminated.
3. The leakage-resistant low-loss driving motor according to claim 1, wherein: the stator core insert consists of tooth blocks, each tooth block is made of oriented silicon steel, each piece of oriented silicon steel is punched into a plurality of single pieces with consistent shapes according to a tooth part design drawing in a single-die punching mode, and then the single pieces are bonded in a self-bonding mode to form the oriented silicon steel tooth blocks with consistent shapes along the rolling direction of magnetic force lines.
4. The leakage-resistant low-loss driving motor according to claim 1, wherein: the non-oriented silicon steel used for the annular rotor core matrix adopts a single-die stamping mode, a plurality of single sheets with consistent shapes are stamped according to a matrix design drawing, and after the single sheets are laminated, the single sheets are splice welded on the inner circle of the annular matrix, namely a section contacted with a shaft, to form an annular cylinder.
5. The leakage-resistant low-loss driving motor according to claim 1, wherein: the rotor core insert consists of tooth blocks, each tooth block is made of oriented silicon steel, each piece of oriented silicon steel is punched into a plurality of single pieces with consistent shapes according to a tooth part design drawing by adopting a single-die punching mode, and then the single pieces are bonded by adopting a self-bonding mode to form the oriented silicon steel tooth blocks with consistent shapes along the rolling direction of magnetic force lines.
6. The leakage-resistant low-loss driving motor according to claim 1, wherein: and the inner sides of all star angles of the annular rotor core matrix are respectively provided with rotor lightening holes which are axially communicated.
7. The leakage-resistant low-loss driving motor according to claim 6, wherein: the rotor lightening holes are triangular.
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CN108199505A (en) * | 2017-12-29 | 2018-06-22 | 上海英磁新能源科技有限公司 | A kind of orientation silicon steel stator core and preparation method thereof |
CN113346646B (en) * | 2021-06-11 | 2024-06-18 | 西北工业大学 | Stator structure, rotor structure matched with stator structure and permanent magnet motor |
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CN113746234B (en) * | 2021-09-07 | 2022-09-27 | 西安邮电大学 | Motor salient pole rotor made of oriented silicon steel |
DE102021211716A1 (en) | 2021-10-18 | 2022-11-17 | Zf Friedrichshafen Ag | Rotor arrangement for an electrical machine |
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CN205986369U (en) * | 2016-06-12 | 2017-02-22 | 上海英磁新能源科技有限公司 | Anti magnetic leakage low -loss driving motor structure |
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