CN111064295B - Motor rotor and manufacturing method thereof, reluctance motor and electric automobile - Google Patents
Motor rotor and manufacturing method thereof, reluctance motor and electric automobile Download PDFInfo
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- CN111064295B CN111064295B CN201911252225.5A CN201911252225A CN111064295B CN 111064295 B CN111064295 B CN 111064295B CN 201911252225 A CN201911252225 A CN 201911252225A CN 111064295 B CN111064295 B CN 111064295B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000004080 punching Methods 0.000 claims abstract description 89
- 230000004888 barrier function Effects 0.000 claims abstract description 25
- 230000004907 flux Effects 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 210000003746 feather Anatomy 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims 2
- 238000000034 method Methods 0.000 description 8
- 230000005284 excitation Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000003313 weakening effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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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
- H02K1/22—Rotating parts of the magnetic circuit
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- 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
- H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The application provides a motor rotor, a manufacturing method of the motor rotor, a reluctance motor and an electric automobile. This electric motor rotor includes rotor core (1), rotor core (1) includes a plurality of magnetic barriers group that set up along circumference, every magnetic barrier group is including two at least magnetic flux barriers (2) along radial setting, form magnetic conduction passageway (3) between adjacent magnetic flux barrier (2), rotor core (1) still includes a plurality of rotor punching sheet (4) along axial superpose, be provided with shaft hole (5) on rotor punching sheet (4), shaft hole (5) are for rotor punching sheet (4) eccentric settings, shaft hole (5) coaxial setting of each rotor punching sheet (4), along the direction from electric motor rotor's one end to the other end, the excircle centre of a circle of rotor punching sheet (4) is the spiral of the central axis spiral extension around shaft hole (5). According to the motor rotor, the counter potential sine degree can be improved, the harmonic magnetic field is effectively restrained, and electromagnetic noise and vibration caused by harmonic electromagnetic exciting force are reduced.
Description
Technical Field
The application relates to the technical field of motor equipment, in particular to a motor rotor and a manufacturing method thereof, a reluctance motor and an electric automobile.
Background
The permanent magnet synchronous motor is a main stream development trend of a high-efficiency variable frequency motor and is a powerful support for supporting the upgrade of Chinese industry, but the exploitation limit of rare earth resources at present severely restricts the production of the permanent magnet motor, and the development of a rare earth-free motor is imperative. The permanent magnet auxiliary synchronous reluctance motor adopts a rare earth-free reluctance motor structure, uses ferrite magnetic steel, simultaneously utilizes reluctance torque and permanent magnet torque, improves the energy efficiency to IE5, has the characteristics of high energy efficiency and low cost, and simultaneously conforms to the strategic national policy of restricting the large-scale development of rare earth resources.
The permanent magnet auxiliary reluctance motor has complex internal operation magnetic field and higher harmonic content of the magnetic field, so that the harmonic electromagnetic force of a main noise source of the motor is higher, the noise vibration of the motor is higher, and the quality problem is caused, which is one of bottlenecks disturbing the development of the permanent magnet auxiliary reluctance motor.
Disclosure of Invention
Therefore, an object of the present invention is to provide a motor rotor, a method for manufacturing the motor rotor, a reluctance motor, and an electric vehicle, which can improve the sine degree of a back electromotive force, effectively suppress a harmonic magnetic field, and reduce electromagnetic noise and vibration caused by a harmonic electromagnetic excitation force.
In order to solve the problem, the application provides an electric motor rotor, including rotor core, rotor core includes a plurality of magnetic barrier groups that set up along the circumference interval, every magnetic barrier group is including two at least magnetic flux barriers along radial interval setting, form the magnetic conduction passageway between the adjacent magnetic flux barrier, rotor core still includes a plurality of rotor punching sheets of axial superpose along, be provided with the shaft hole on the rotor punching sheet, the shaft hole is for rotor punching sheet eccentric settings, the coaxial setting in shaft hole of each rotor punching sheet, along the direction from electric motor rotor's one end to the other end, the excircle centre of a circle of rotor punching sheet is the spiral that extends around the central axis spiral of shaft hole.
Preferably, the deflection angle of the excircle center of the rotor punching sheet is theta, and the axial height of the rotor core is h, wherein theta changes along with the change of h.
Preferably, the first and second electrodes are formed of a metal,
wherein L is the axial overall height of the rotor core, and n is the number of the rotation cycles of the excircle center of the rotor punching sheet in the axial direction.
Preferably, the number of the rotation cycles of the excircle center of the rotor sheet in the axial direction is n, wherein n is an even number.
Preferably, the eccentric distance between the center of the shaft hole and the circle center of the excircle of the rotor punching sheet is Rs, the thickness of the air gap on the periphery of the motor rotor is delta, and the Rs/delta is more than or equal to 0.4 and less than or equal to 0.6.
Preferably, the motor rotor further comprises a stacking shaft, and the rotor punching sheets are stacked on the stacking shaft.
Preferably, the inner peripheral wall of the rotor punching sheet is provided with a key groove, the outer peripheral wall of the stacking shaft is provided with an inclined key extending in a spiral mode, and the key groove is installed on the inclined key.
Preferably, the key groove is in clearance fit with the inclined key, the clearance is 0.1-0.15 mm, and the roughness of the groove wall of the key groove and the periphery of the inclined key is smaller than or equal to 1.6.
Preferably, the cross-section of the feather key is rectangular, trapezoidal, triangular or semicircular.
According to another aspect of the present application, there is provided a method for manufacturing the rotor of the electric machine, including:
processing a preset number of rotor punching sheets;
processing a shaft hole on the rotor punching sheet, and enabling the shaft hole to be eccentrically arranged relative to the circle center of the excircle of the rotor punching sheet, wherein the specifications of the rotor punching sheets are the same;
the rotor punching sheets are overlapped, so that the shaft holes of the rotor punching sheets are coaxial, and the circle center of the outer circle of each rotor punching sheet is spiral and extends spirally around the central axis of the shaft hole along the axial direction.
Preferably, the step of superposing the rotor punching sheets so that the shaft holes of the rotor punching sheets are coaxial, and the step of spirally extending the outer circle center of each rotor punching sheet around the central axis of the shaft hole along the axial direction comprises the following steps:
key grooves are processed on the inner wall of the shaft hole of the rotor punching sheet, and the key grooves on the rotor punching sheets are identical in position;
processing a stacking shaft, and processing an inclined key spirally extending along the axial direction on the peripheral wall of the stacking shaft;
and stacking the rotor punching sheets one by one along the inclined keys to form an eccentric circular screw rotating structure.
Preferably, the manufacturing method further comprises:
carrying out secondary clamping on the laminated eccentric circular screw rotating structure;
and stamping the clamped eccentric circular screw rotating structure, and stamping and forming the magnetic flux barrier.
According to another aspect of the present application, a reluctance motor is provided, which includes a motor rotor and a motor stator, wherein the motor rotor is the motor rotor described above.
According to another aspect of the application, an electric vehicle is provided, which comprises the motor rotor or the reluctance motor.
The application provides an electric motor rotor, including rotor core, rotor core includes a plurality of magnetic barriers group that set up along the circumference interval, every magnetic barrier group is including two at least magnetic flux barriers along radial interval setting, form the magnetic conduction passageway between the adjacent magnetic flux barrier, rotor core still includes a plurality of rotor punching pieces of axial superpose of following, be provided with the shaft hole on the rotor punching piece, the shaft hole is for rotor punching piece eccentric settings, the coaxial setting in shaft hole of each rotor punching piece, along the direction from electric motor rotor's one end to the other end, the excircle centre of a circle of rotor punching piece is the spiral of the central axis spiral extension around the shaft hole. The motor rotor can form a spiral eccentric motor rotor, so that the magnetic field position of each rotor punching sheet in the axial direction can be changed by using the spiral eccentric motor rotor structure to form a dynamic eccentric rotor structure, the counter electromotive force sine degree can be improved, the harmonic magnetic field can be effectively inhibited, and the electromagnetic noise and vibration caused by the harmonic electromagnetic excitation force can be reduced.
Drawings
Fig. 1 is a schematic perspective view of a rotor of an electric machine according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a rotor of an electric machine according to an embodiment of the present application;
FIG. 3 is a schematic side view of a rotor of an electric machine according to an embodiment of the present disclosure;
FIG. 4 is a schematic view of a dimensional structure of a rotor of an electric machine according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a helical eccentricity of a rotor of an electric machine according to an embodiment of the present application;
FIG. 6 is a schematic view of a helical eccentric axial direction of a rotor of an electric machine according to an embodiment of the present application;
FIG. 7 is a schematic view of a process for manufacturing a rotor of an electric machine according to an embodiment of the present application;
fig. 8 is a schematic diagram of a distribution of unilateral magnetic pull force of a rotor of an electric machine according to an embodiment of the present application.
The reference numerals are represented as:
1. a rotor core; 2. a magnetic flux barrier; 3. a magnetic conduction channel; 4. rotor punching sheets; 5. a shaft hole; 6. stacking the shafts; 7. a keyway; 8. a feather key; 9. a stop flange.
Detailed Description
With reference to fig. 1 to 8, according to an embodiment of the present application, an electric motor rotor includes a rotor core 1, the rotor core 1 includes a plurality of magnetic barrier groups arranged along a circumferential interval, each magnetic barrier group includes at least two magnetic flux barriers 2 arranged along a radial interval, a magnetic conduction channel 3 is formed between adjacent magnetic flux barriers 2, the rotor core 1 further includes a plurality of rotor sheets 4 stacked along an axial direction, a shaft hole 5 is provided on each rotor sheet 4, the shaft hole 5 is eccentrically arranged with respect to the rotor sheet 4, the shaft hole 5 of each rotor sheet 4 is coaxially arranged, along a direction from one end of the electric motor rotor to the other end, an excircle center of each rotor sheet 4 is a spiral shape extending around a central axis of the shaft hole 5.
The motor rotor can form a spiral eccentric motor rotor, so that the magnetic field position of each rotor punching sheet in the axial direction can be changed by using the spiral eccentric motor rotor structure to form a dynamic eccentric rotor structure, the counter electromotive force sine degree can be improved, the harmonic magnetic field can be effectively inhibited, and the electromagnetic noise and vibration caused by the harmonic electromagnetic excitation force can be reduced.
After the spiral eccentric motor rotor structure is adopted, the amplitude of a harmonic magnetic field can be reduced by 90%, and compared with a rotor without an eccentric structure, the noise of a motor is reduced by 4-6 dB; in addition, the counter potential content of the harmonic wave is lower than 1%, the control by a controller is easy, and the control precision is improved; the rotor structure of this application can also effectively reduce the unilateral magnetic pull that the assembly is eccentric to lead to, avoids the condition such as bearing damage, sweeping the thorax to appear in the motor operation process, increases motor operational reliability.
In the embodiment, the deflection angle of the outer circle center of the rotor punching sheet 4 is θ, and the axial height of the rotor core 1 is h, where θ changes with the change of h. Theta is an eccentric rotation angle, and refers to an angle of the maximum distance between the outer diameter of the rotor sheet 4 with different eccentric circles in the iron core and the circle center, and the angle is offset compared with the initial position. The maximum eccentric position of the rotor changes along with the change of the spiral eccentric angle, a spiral structure is formed in appearance, and the magnetic field positions of each rotor punching sheet 4 in the axial direction are different.
Preferably, the number of the rotation cycles of the excircle center of the rotor punching sheet 4 in the axial direction is n, where n is an even number.
The eccentric distance between the center of the shaft hole 5 and the excircle center of the rotor punching sheet 4 is Rs, the thickness of an air gap on the periphery of the motor rotor is delta, and the Rs/delta is more than or equal to 0.4 and less than or equal to 0.6.
Every piece of rotor punching 4 in the rotor core 1 of the spiral eccentric structure rotor of this application all is the eccentric circle structure, and the circle centre of a circle is concentric with electric motor rotor's rotation center in the stator, and every piece of rotor punching 4 forms and moves off-centre, and moves the main harmonic magnetic field under the eccentric state, if the peak value of tooth harmonic can have certain weakening, the amplitude of weakening can compensate on the peak value of near frequency, harmonic electromagnetic force frequency spectrum can present the level and smooth. The attenuation amplitude f varies as follows:
in the formula, p2Is the harmonic electromagnetic exciting force amplitude p in the non-eccentric state1The amplitude of the harmonic electromagnetic excitation force in the dynamic eccentric state is delta, and the thickness of the air gap is delta. The weakening amplitude f is gradually increased along with the increase of the ratio of the eccentric distance Rs to the air gap length delta, however, considering that the chamber sweeping is easy to generate when the eccentric amount is large, the ratio cannot be too large, so that the comprehensive reliability and the weakening strength of the tooth harmonic wave are achieved, the ratio of Rs to delta is 0.4-0.6, at the moment, the harmonic magnetic field can be weakened by more than 90% in a non-eccentric state, and meanwhile, due to the reduction of the harmonic magnetic field, the counter electromotive force harmonic wave of the motor synchronously descends to be within 1%.
The eccentricity can cause unilateral magnetic pulling force in the same direction continuously on the rotating shaft, and the long-term operation reliability of the motor is influenced, so that the eccentricity is needed to be carried out in the symmetrical direction to form a symmetrical eccentric structure so as to balance the unilateral magnetic pulling force. By adopting the spiral eccentric rotor, the positions of the adjacent rotor punching sheets 4 in the magnetic field deflect a certain angle in the iron core, so that a spiral structure is formed, the unilateral magnetic pulling force caused by eccentricity is uniformly balanced, as shown in figure 8, and the sine degree of counter electromotive force is improved due to the spiral eccentric action, so that the electromagnetic noise and vibration caused by harmonic electromagnetic excitation force are reduced.
In the embodiment, the motor rotor further comprises a stacking shaft 6, and the rotor punching sheet 4 is stacked on the stacking shaft 6. The structure of the stacking shaft 6 is matched with that of the rotor punching sheet 4, so that the rotor punching sheet 4 is conveniently arranged on the stacking shaft 6, and an eccentric rotor structure is formed.
Specifically, a key groove 7 is formed in the inner peripheral wall of the rotor sheet 4, an inclined key 8 extending spirally is formed in the outer peripheral wall of the stacking shaft 6, and the key groove 7 is mounted on the inclined key 8. In the process of stacking the rotor punching sheets 4, the guide screws of the inclined keys 8 are arranged, after the rotor punching sheets 4 are arranged in place, a rotor structure with a spiral appearance is formed, the difficulty of forming the spiral eccentric rotor by the rotor punching sheets 4 is reduced, meanwhile, the size of the formed spiral eccentric rotor structure is more accurate through structural processing of the inclined keys 8, and the back electromotive force sine degree of the motor is further improved.
Preferably, the stop flange 9 is arranged at the tail end of the stacking shaft 6, and the stop flange 9 can form an axial stop for the rotor sheet 4 in the installation process of the rotor sheet 4, so that the rotor sheet 4 can be quickly and accurately installed in place. The diameter of the stop flange 9 is larger than that of the shaft hole 5 of the rotor punching sheet 4. The stopper flange 9 may be formed integrally with the stacking shaft 6, or may be separately machined and then fixedly attached to the stacking shaft 6.
In order to reduce the installation difficulty of the rotor punching sheet 4 on the stacking shaft 6 and improve the installation efficiency, preferably, the key groove 7 is in clearance fit with the inclined key 8, the clearance is 0.1-0.15 mm, and the roughness of the groove wall of the key groove 7 and the periphery of the inclined key 8 is smaller than or equal to 1.6.
The cross section of the inclined key 8 is rectangular, trapezoidal, triangular or semicircular.
According to an embodiment of the application, a manufacturing method of the motor rotor includes: processing a preset number of rotor punching sheets 4; processing a shaft hole 5 on the rotor punching sheet 4, and enabling the shaft hole 5 to be eccentrically arranged relative to the excircle center of the rotor punching sheet 4, wherein the specifications of the rotor punching sheets 4 are the same; the rotor punching sheets 4 are overlapped, so that the shaft holes 5 of the rotor punching sheets 4 are coaxial, and the circle centers of the outer circles of the rotor punching sheets 4 are spiral extending around the central axis of the shaft hole 5 along the axial direction.
By the method, the spiral eccentric motor rotor can be rapidly and accurately processed and manufactured, so that the design requirement of the motor rotor is met.
The motor rotor formed by the mode can form a spiral eccentric motor rotor, so that the magnetic field position of each rotor punching sheet on the axial direction can be changed by utilizing the spiral eccentric motor rotor structure, the dynamic eccentric rotor structure is formed, the counter electromotive force sine degree can be improved, the harmonic magnetic field is effectively inhibited, and the electromagnetic noise and vibration caused by the harmonic electromagnetic exciting force are reduced.
Superpose rotor punching 4 for 5 coaxial in the shaft hole of each rotor punching 4, make the excircle centre of a circle of rotor punching 4 simultaneously along the axial be the spiral step that extends around the central axis spiral of shaft hole 5 and include: key grooves 7 are machined in the inner wall of the shaft hole 5 of the rotor punching 4, and the positions of the key grooves 7 on the rotor punching 4 are the same; machining a stacked shaft 6, and machining an inclined key 8 which extends spirally along the axial direction on the outer peripheral wall of the stacked shaft 6; and the rotor punching sheets 4 are stacked one by one along the inclined keys 8 to form an eccentric round screw rotating structure. By adopting the method, the rotor punching sheets 4 can be assembled more quickly and accurately, and the rotor punching sheets 4 are arranged on the stacking shaft 6 according to a preset mode to form a spiral eccentric rotor structure.
The manufacturing method further comprises the following steps: carrying out secondary clamping on the laminated eccentric circular screw rotating structure; and stamping the clamped eccentric circular screw rotating structure, and stamping and forming the magnetic flux barrier 2.
Through the mode, the magnetic flux barrier of the reluctance motor can be processed, so that the processing process of the rotor core is completed.
According to an embodiment of the present application, a reluctance motor includes a motor rotor and a motor stator, and the motor rotor is the motor rotor described above.
According to an embodiment of the application, the electric vehicle comprises the motor rotor or the reluctance motor.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (14)
1. The motor rotor is characterized by comprising a rotor core (1), wherein the rotor core (1) comprises a plurality of magnetic barrier groups arranged at intervals along the circumferential direction, each magnetic barrier group comprises at least two magnetic flux barriers (2) arranged at intervals along the radial direction, a magnetic conduction channel (3) is formed between every two adjacent magnetic flux barriers (2), the rotor core (1) further comprises a plurality of rotor punching sheets (4) overlapped along the axial direction, a shaft hole (5) is formed in each rotor punching sheet (4), the shaft hole (5) is eccentrically arranged relative to the rotor punching sheets (4), the shaft holes (5) of the rotor punching sheets (4) are coaxially arranged, and the circle center of the excircle of each rotor punching sheet (4) is spirally extended around the central axis of the shaft hole (5) along the direction from one end to the other end of the motor rotor; the specifications of the rotor punching sheets (4) are the same.
2. The motor rotor as recited in claim 1, characterized in that the deflection angle of the excircle center of the rotor punching sheet (4) is θ, the axial height of the rotor core (1) is h, and θ changes with the change of h.
3. The electric machine rotor of claim 2,
l is the axial total height of the rotor core (1), and n is the number of the rotation cycles of the excircle center of the rotor punching sheet (4) in the axial direction.
4. The motor rotor as recited in claim 1, characterized in that the number of the rotation cycles of the outer circle center of the rotor punching sheet (4) in the axial direction is n, wherein n is an even number.
5. The motor rotor as recited in claim 1, characterized in that the eccentric distance between the center of the shaft hole (5) and the center of the outer circle of the rotor punching sheet (4) is Rs, the thickness of the air gap at the periphery of the motor rotor is δ, wherein Rs/δ is more than or equal to 0.4 and less than or equal to 0.6.
6. An electric machine rotor according to any of claims 1-5, characterized in that the electric machine rotor further comprises a lamination shaft (6), the rotor sheet (4) being laminated on the lamination shaft (6).
7. The motor rotor as recited in claim 6, characterized in that a key groove (7) is formed in the inner peripheral wall of the rotor punching sheet (4), a helically extending inclined key (8) is formed in the outer peripheral wall of the stacking shaft (6), and the key groove (7) is mounted on the inclined key (8).
8. An electric machine rotor according to claim 7, characterized in that the key slot (7) is clearance fitted with the feather key (8) with a clearance of 0.1-0.15 mm, and the roughness of the slot wall of the key slot (7) and the outer periphery of the feather key (8) is less than or equal to 1.6.
9. An electric machine rotor, according to claim 7, characterized in that the cross-section of the feather key (8) is rectangular, trapezoidal, triangular or semicircular.
10. A method of manufacturing a rotor for an electrical machine according to any one of claims 1 to 9, comprising:
processing a preset number of rotor punching sheets (4);
processing a shaft hole (5) on the rotor punching sheet (4), and enabling the shaft hole (5) to be eccentrically arranged relative to the excircle center of the rotor punching sheet (4), wherein the specifications of the rotor punching sheets (4) are the same;
the rotor punching sheets (4) are overlapped, so that the shaft holes (5) of the rotor punching sheets (4) are coaxial, and the circle center of the excircle of each rotor punching sheet (4) is spiral and extends around the central axis of the shaft hole (5) in a spiral mode along the axial direction.
11. The manufacturing method according to claim 10, wherein the step of superposing the rotor sheets (4) so that the shaft holes (5) of the rotor sheets (4) are coaxial and the circle centers of the outer circles of the rotor sheets (4) axially form a spiral shape extending spirally around the central axis of the shaft holes (5) comprises the following steps:
key grooves (7) are machined in the inner wall of a shaft hole (5) of each rotor punching (4), and the positions of the key grooves (7) on the rotor punching (4) are the same;
machining a stacked shaft (6), and machining an inclined key (8) which extends spirally along the axial direction on the outer peripheral wall of the stacked shaft (6);
and the rotor punching sheets (4) are stacked one by one along the inclined keys (8) to form an eccentric circular screw rotating structure.
12. The method of manufacturing of claim 11, further comprising:
carrying out secondary clamping on the laminated eccentric circular screw rotating structure;
and stamping the clamped eccentric circular screw rotating structure, and stamping and forming the magnetic flux barrier (2).
13. A reluctance machine comprising a machine rotor and a machine stator, characterized in that the machine rotor is a machine rotor according to any of claims 1 to 9.
14. An electric vehicle comprising an electric machine rotor according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911252225.5A CN111064295B (en) | 2019-12-09 | 2019-12-09 | Motor rotor and manufacturing method thereof, reluctance motor and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911252225.5A CN111064295B (en) | 2019-12-09 | 2019-12-09 | Motor rotor and manufacturing method thereof, reluctance motor and electric automobile |
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| Publication Number | Publication Date |
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| CN111064295A CN111064295A (en) | 2020-04-24 |
| CN111064295B true CN111064295B (en) | 2021-07-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102013206045A1 (en) * | 2013-04-05 | 2014-10-09 | Ksb Aktiengesellschaft | Method for producing a rotor and rotor |
| RU2638826C2 (en) * | 2013-04-12 | 2017-12-18 | Сименс Акциенгезелльшафт | Jet-drive rotor with launching support device |
| CN106612024A (en) * | 2015-10-27 | 2017-05-03 | Abb技术有限公司 | Rotor and rotor manufacturing method |
| CN205141857U (en) * | 2015-12-08 | 2016-04-06 | 乐山牧田电器有限公司 | Rotor structure of motor |
| CN109861414A (en) * | 2017-11-30 | 2019-06-07 | 日本电产株式会社 | Rotor, motor and the electrical equipment comprising the motor |
| CN209805519U (en) * | 2019-05-14 | 2019-12-17 | 浙江四福机电有限公司 | Rotor punching sheet |
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