CN114498968B - Multidirectional combination of motor core magnetic conduction punching is folded and is pressed structure - Google Patents
Multidirectional combination of motor core magnetic conduction punching is folded and is pressed structure Download PDFInfo
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- CN114498968B CN114498968B CN202210384541.3A CN202210384541A CN114498968B CN 114498968 B CN114498968 B CN 114498968B CN 202210384541 A CN202210384541 A CN 202210384541A CN 114498968 B CN114498968 B CN 114498968B
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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
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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
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/15—Sectional machines
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- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a multidirectional combined laminating structure for a magnetic conducting punching sheet of a motor iron core, and belongs to the technical field of power generation, power transformation or power distribution. The stator core punching sheet is formed by punching a silicon steel sheet with high magnetic conductivity. When a magnetic line of force vertical to the surface of the punching sheet exists during the operation of the motor, the lamination mode of the punching sheet is changed according to the track direction of the magnetic line of force in the iron core, and the stator iron core is composed of a radial lamination area and an axial lamination area. The radial lamination area is formed by radially arranging and axially stacking radial magnetic-conducting lamination sheets and is positioned at the position where the radial component of the magnetic force line is greater than the axial component; the axial lamination area is formed by axially arranging and radially stacking axial magnetic-conducting punching sheets and is positioned at the position where the axial component of the magnetic force line is greater than the radial component. The plane of the magnetic conduction stamped sheet is parallel to the magnetic force line to the maximum extent, so that the magnetic force line perpendicular to the surface of the stamped sheet is reduced, and the effects of limiting the eddy current in the stamped sheet and reducing the loss of an iron core are achieved.
Description
Technical Field
The invention relates to an optimized design of a multi-direction combination and lamination mode of a magnetic conducting punching sheet of a motor core, particularly discloses a multi-direction lamination mode of a magnetic conducting punching sheet of a motor core, and belongs to the technical field of power generation, power transformation or power distribution.
Background
The motor is used as a device for electromechanical energy conversion, the efficiency and the temperature rise of the motor are important indexes for measuring the performance of the motor, the loss of the motor is reduced, the efficiency of the motor can be effectively improved, and the heating can be effectively inhibited. In addition, in applications such as motors with inconsistent axial lengths of the stator and the rotor, axial flux motors, and the like, the core eddy current loss accounts for a large proportion of the core loss.
The existing methods for reducing the eddy current loss of the motor mainly comprise: the magnetic flux distribution in the motor is reasonably adjusted by changing the groove shape, the winding arrangement and the silicon steel sheet material, so that the stress during the stamping process of the lamination is reduced, and the like. The existing radial motor iron core is generally stacked along the axial direction by radial magnetic-conducting punching sheets, and silicon steel sheets of an axial magnetic-flux motor are generally wound or wound in the above mode. When there is the magnetic flux of perpendicular to towards the piece direction, current iron core is stamped the lamination mode and will be brought great towards the piece vortex, is unfavorable for reducing the eddy current loss.
In conclusion, the eddy current loss cannot be fully reduced in the prior art, the arrangement mode of the iron core punching sheets is changed, and the multi-direction combination laminating mode of the magnetic conduction punching sheets of the motor iron core is provided.
Disclosure of Invention
The technical problem is as follows: the invention aims to overcome the defects of the prior art and provide a multidirectional combined laminated structure of magnetic conducting punching sheets of a motor core.
The technical scheme is as follows: the invention relates to a multi-direction combined laminating structure of magnetic conducting punching sheets of a motor iron core, wherein a motor stator iron core of the structure consists of a radial laminating area and an axial laminating area, the radial laminating area is formed by radially arranging and axially stacking the radial magnetic conducting punching sheets, and the axial laminating area is formed by axially arranging and radially stacking the axial magnetic conducting punching sheets; the radial lamination area is positioned at the inner side of the axial lamination area to form a combined lamination structure.
The radial lamination area is formed by laminating radial magnetic conduction punching sheets and is positioned at the position where the radial component of the magnetic force line is greater than the axial component.
The axial lamination area is formed by laminating axial magnetic conduction punching sheets and is positioned at the position where the axial component of the magnetic force line is greater than the radial component.
In the combined laminated structure, the iron core punching sheet of the part, which is not connected with the stator teeth, of the motor stator yoke part is divided into an upper part and a lower part which are respectively positioned at the upper end and the lower end of a radial laminated area, and the formed axial laminated area is axially arranged and radially stacked; the radial lamination area formed by iron core punching sheets at the part where the motor stator yoke part is connected with the stator teeth is radially arranged and axially stacked.
The axial lamination zones are located above and below the stator yoke.
The radial lamination area is located in the middle of the stator yoke portion and at the stator teeth.
In the combined laminated structure, the middle part of the axial laminated area is provided with a notch, and the radial laminated area is embedded in the notch of the axial laminated area.
In the combined laminated structure, the radial laminated area is positioned on the inner side of the axial laminated area.
The middle part of the axial lamination area is provided with a notch, the upper part and the lower part of the notch are respectively in contact with the radial lamination area at an inclination angle of 30-60 degrees, the outer side of the radial lamination area is at an inclination angle of 30-60 degrees, and the notch of the axial lamination area is matched with the outer side of the radial lamination area.
The middle part of the axial lamination area is provided with a notch, the upper part and the lower part of the notch are respectively in a step shape with the part contacted with the radial lamination area, the outer side of the radial lamination area is also in a step shape, and the step-shaped notch of the axial lamination area is matched with the step-shaped part of the outer side of the radial lamination area.
When a magnetic force line vertical to the surface of the punching sheet exists during the operation of the motor, the laminating direction of the punching sheet is changed according to the track direction of the magnetic force line in the iron core, and the plane of the magnetic conduction punching sheet is parallel to the magnetic force line to the maximum extent, so that the scheme of combined laminating of the iron core punching sheets is formed. Compared with a traditional punching sheet in a radial laminating mode, the eddy current in the iron core caused by a variable magnetic field in the direction perpendicular to the punching sheet is greatly reduced. The technical effect of reducing eddy current loss of the motor can be achieved.
According to the multidirectional combined and laminated device for the magnetic conducting stamped sheets of the motor iron core, the designed stamped sheet combination and lamination are not limited to the structure provided by the application, and any combination can be performed according to the actual situation under the condition that the plane of the magnetic conducting stamped sheet is parallel to the magnetic force line to the maximum extent, and the multidirectional combined and laminated device is not limited to the combination mode provided by the invention.
Has the advantages that: by adopting the technical scheme, the invention has the following advantages:
(1) the whole motor stator core is simple in integral structure, the magnetic conduction stamped steel is adopted in a multi-direction combined laminating mode, and the eddy current loss of the core can be reduced.
(2) Use the multi-direction combination of a motor core magnetic conduction towards piece and fold and press the device and reform transform stator core, the feasibility is strong, is applicable to various types of motor.
(3) The multi-direction combination and lamination mode of the magnetic conducting punching sheet of the motor core is not limited to one mode, and can be further determined according to the actual condition of magnetic lines of force, performance requirements and process technology.
Drawings
Fig. 1 is a schematic view of the direction of magnetic lines of magnetic force of a stator core of a motor with different axial lengths of a stator and a rotor.
Fig. 2 shows that the whole magnetic conducting stamped sheet of the motor stator core is radially arranged and axially stacked.
FIG. 3 shows that the axial arrangement of the iron core punching sheets at the parts, disconnected with the stator teeth, of the stator yoke part is stacked along the radial direction, and the radial arrangement of the punching sheets at the other parts is stacked along the axial direction.
Fig. 4 is that stator yoke portion and the disconnected part iron core towards piece axial setting of stator tooth are radially piled up, and the existing radial setting of all the other parts iron core towards piece is piled up along the axial and also has the axial setting to pile up along radially.
Fig. 5 shows the axial arrangement of the stator yoke core laminations in a radial stack.
Fig. 6 is a simulation diagram of the motor core loss of different combinations of motor core laminations with different axial lengths of the stator and the rotor.
Fig. 7 is a structural diagram of the contact part of the axial lamination area and the radial lamination area is an inclined angle of 30-60 degrees.
Fig. 8 is a schematic structural view of a contact portion between the axial lamination area and the radial lamination area in a stepped shape.
The figure has the following components: a radial lamination zone 1 and an axial lamination zone 2.
Detailed Description
The technical scheme of the invention is explained in detail by combining the examples.
As shown in fig. 1, the axial lengths of the stator and the rotor of the motor are different, and the magnetic lines of force in the stator core have both radial components and axial components.
In the figure 2, the whole stator core punching sheet of the motor is radially arranged and axially stacked, in the figure 3, the part of the core punching sheet, which is not connected with the stator teeth, of the stator yoke part of the motor is axially arranged and radially stacked, in the figure 4, the part, which is larger than the axial component, of the punching sheet is radially arranged and axially stacked according to the distribution condition of the magnetic force lines in the figure 1, in the figure 4, the core punching sheet of the motor is axially stacked, otherwise, the punching sheet is axially stacked, the plane of the magnetic conduction punching sheet is enabled to be parallel with the magnetic force lines to the maximum extent, the core of the stator teeth is radially arranged and axially stacked, in the part, which is not connected with the stator teeth, the core punching sheet is axially arranged and radially stacked, in the rest part, the core punching sheet is radially arranged and axially stacked, the multi-direction combination and lamination mode of the magnetic conduction punching sheet is adopted, and in the figure 5, the whole part of the stator yoke part of the motor adopts the core punching sheet is axially arranged and radially stacked, the stator tooth iron core punching sheet is radially arranged and axially stacked.
Fig. 4 shows a multi-directional combination laminating manner of magnetic-conductive stamped sheets, in which a stator core of a motor is composed of a radial laminated area and two axial laminated areas, and the radial laminated area is formed by radially arranging the radial magnetic-conductive stamped sheets and axially stacking the radial magnetic-conductive stamped sheets and is located at a position where a radial component of a magnetic line of force is greater than an axial component. The axial lamination area is formed by axially stacking axial magnetic conduction punching sheets and is positioned at the position where the axial component of the magnetic force line is greater than the radial component. The stator teeth are composed of radial lamination areas, and the parts, which are not connected with the stator teeth, in the stator yoke part are divided into an upper part and a lower part which are composed of axial lamination areas and are respectively positioned at the upper end and the lower end of the radial lamination areas. The remaining portion includes both axial and radial lamination zones. The axial lamination areas are located above and below the stator yoke portion, and the radial lamination areas are located in the middle of the stator yoke portion and at the stator teeth. The middle part of the axial lamination area is provided with a notch, and the radial lamination area is embedded in the notch of the axial lamination area and is positioned on the inner side of the axial lamination area. The magnetic-conducting stamped steel is arranged along the direction of magnetic lines of force to the maximum extent, eddy current is limited in a narrow sheet, when magnetic flux passes through the narrow section of the sheet, net electromotive force in a loop is small, resistance of the loop is large, and the eddy current is greatly weakened.
Fig. 6 shows a simulation diagram of the effect of reducing the core loss after the motor core magnetic conducting punching sheet multi-direction combined laminating device is used. The simulation models are respectively set up for 4 different combination modes, the normalized iron core loss is based on the conventional motor iron core loss under the same torque, and as can be seen from the figure, the iron core loss is obviously reduced and the effect is best after the multi-direction combination and lamination device of the magnetic conduction punching sheets of the motor iron core is adopted.
In fig. 7, a notch is formed in the middle of the axial lamination area, the contact part between the upper part and the lower part of the notch and the radial lamination area is an inclined angle of 30-60 degrees, the outer side of the radial lamination area is an inclined angle of 30-60 degrees, and the notch of the axial lamination area is matched with the outer side of the radial lamination area.
In fig. 8, a notch is formed in the middle of the axial lamination area, the upper portion and the lower portion of the notch are in a step shape, the portions of the upper portion and the lower portion of the notch, which are in contact with the radial lamination area, are in a step shape, the outer side of the radial lamination area is also in a step shape, and the step-shaped notch of the axial lamination area is matched with the step-shaped portion of the outer side of the radial lamination area.
Fig. 7 and 8 exemplarily illustrate that the existing motor is transformed by using the multi-directional combined lamination device for the magnetic conducting punching sheets of the motor iron core disclosed by the invention, and a person skilled in the art can improve other motors according to the practical application requirements and following the design principle of the invention. Therefore, the multidirectional combined laminating device for the magnetic conducting stamped steel of the motor iron core has universality for the improvement of motors with three-dimensional magnetic fields.
The multi-direction combination and lamination device for the magnetic conducting punching sheet of the motor iron core is not limited to one specific combination mode according to actual conditions, and can be further determined according to actual conditions of magnetic force lines, performance requirements and process technologies.
The above embodiments are merely exemplary of the present patent and do not limit the scope of the patent, and those skilled in the art can make modifications to the parts thereof without departing from the spirit and scope of the patent.
Claims (3)
1. A multi-direction combined laminating structure of a magnetic conduction punching sheet of a motor iron core is characterized in that a motor stator iron core of the structure is composed of a radial laminating area (1) and an axial laminating area (2), the radial laminating area (1) is formed by radially arranging and axially stacking the radial magnetic conduction punching sheet, and the axial laminating area (2) is formed by axially arranging and radially stacking the axial magnetic conduction punching sheet; the radial lamination area (1) is positioned at the inner side of the axial lamination area (2) to form a combined lamination structure;
the radial lamination area is formed by laminating radial magnetic lamination sheets and is positioned at the position where the radial component of the magnetic force line is greater than the axial component;
the axial lamination area is formed by laminating axial magnetic lamination sheets and is positioned at the position where the axial component of the magnetic line of force is greater than the radial component;
in the combined laminating structure, the part of the iron core punching sheet, which is not connected with the stator teeth, of the motor stator yoke part is divided into an upper part and a lower part which are respectively positioned at the upper end and the lower end of a radial laminating area (1), and an axial laminating area (2) is formed by axially stacking along the radial direction; the radial lamination area (1) formed by iron core laminations of the parts, connected with the stator teeth, of the motor stator yoke is radially arranged and axially stacked;
the axial lamination zones are located above and below the stator yoke;
the radial lamination areas are positioned in the middle of the stator yoke and at the stator teeth;
in the combined laminating structure, the middle part of the axial laminating area (2) is provided with a notch, and the radial laminating area (1) is embedded in the notch of the axial laminating area (2).
2. The multidirectional combined laminating structure of the magnetic punching sheets of the motor iron core according to claim 1, wherein a notch is formed in the middle of the axial laminating area (2), the position, in which the upper portion and the lower portion of the notch are respectively in contact with the radial laminating area (1), has an inclination angle of 30-60 degrees, the outer side of the radial laminating area (1) has an inclination angle of 30-60 degrees, and the notch of the axial laminating area (2) is matched with the outer side of the radial laminating area (1).
3. The multidirectional combined laminating structure of the magnetic punching sheets of the motor iron core according to claim 1, wherein a notch is formed in the middle of the axial laminating area (2), the upper portion and the lower portion of the notch are respectively in a step shape with the portion, in contact with the radial laminating area (1), of the upper portion and the lower portion of the notch, the outer side of the radial laminating area (1) is also in a step shape, and the step-shaped notch of the axial laminating area (2) is matched with the step-shaped portion of the outer side of the radial laminating area (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210384541.3A CN114498968B (en) | 2022-04-13 | 2022-04-13 | Multidirectional combination of motor core magnetic conduction punching is folded and is pressed structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210384541.3A CN114498968B (en) | 2022-04-13 | 2022-04-13 | Multidirectional combination of motor core magnetic conduction punching is folded and is pressed structure |
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| Publication Number | Publication Date |
|---|---|
| CN114498968A CN114498968A (en) | 2022-05-13 |
| CN114498968B true CN114498968B (en) | 2022-07-15 |
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| CN202210384541.3A Active CN114498968B (en) | 2022-04-13 | 2022-04-13 | Multidirectional combination of motor core magnetic conduction punching is folded and is pressed structure |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013157083A1 (en) * | 2012-04-17 | 2013-10-24 | 株式会社安川電機 | Rotating electrical machine |
| CN113315270A (en) * | 2021-06-02 | 2021-08-27 | 河北工业大学 | Claw-pole motor stator core and motor assembly applying same |
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