CN111769671A - Rotor core for permanent magnet brushless direct current 8P motor - Google Patents
Rotor core for permanent magnet brushless direct current 8P motor Download PDFInfo
- Publication number
- CN111769671A CN111769671A CN202010724225.7A CN202010724225A CN111769671A CN 111769671 A CN111769671 A CN 111769671A CN 202010724225 A CN202010724225 A CN 202010724225A CN 111769671 A CN111769671 A CN 111769671A
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- China
- Prior art keywords
- tooth
- sheets
- punching sheet
- punching
- sheet
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
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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
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
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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
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
- H02K21/021—Means for mechanical adjustment of the excitation flux
- H02K21/028—Means for mechanical adjustment of the excitation flux by modifying the magnetic circuit within the field or the armature, e.g. by using shunts, by adjusting the magnets position, by vectorial combination of field or armature sections
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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 relates to the technical field of rotor cores, in particular to a rotor core for a permanent magnet brushless direct current 8P motor, which comprises a second punching sheet, a second inner ring, four second tooth sheets and four third tooth sheets, wherein the four second tooth sheets and the four third tooth sheets are equiangular and are alternately distributed on the outer circumference of the second inner ring; the plurality of second punching sheets are axially stacked together to form a first iron core part, the adjacent second punching sheets rotate by 45 degrees when being stacked, two ends of the first iron core part are respectively provided with at least one first punching sheet, and the number of the first punching sheets arranged at two ends of the first iron core part is equal. The third punching sheet is used on one side to strengthen the connection strength of the iron core, the second punching sheet rotates 45 degrees when being laminated, the structure of cutting off the magnetic isolation bridge is formed while the strength of the iron core is ensured, and the output efficiency of the motor, the utilization rate of rotor magnetic steel and the power density of the motor are improved.
Description
Technical Field
The invention relates to the technical field of rotor cores, in particular to a rotor core for a permanent magnet brushless direct current 8P motor.
Background
Compared with an SPM 8P rotor, the IPM 8P rotor has higher output efficiency due to higher reluctance torque and counter electromotive force, and the integrated IPM 8P rotor core has a magnetic isolation bridge design due to the rotor punching sheet, so that the rotor magnetic steel has a larger magnetic leakage phenomenon, and the utilization rate of the rotor magnetic steel can be reduced.
Disclosure of Invention
The invention aims to solve the defect that the rotor magnetic steel in the prior art has a larger magnetic leakage phenomenon, so that the utilization rate of the rotor magnetic steel is reduced, and provides a rotor core for a permanent magnet brushless direct current 8P motor.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rotor core for a permanent magnet brushless direct current 8P motor comprises a plurality of first punching sheets and a plurality of second punching sheets, wherein each first punching sheet comprises an inner circular ring and eight first tooth sheets, the eight first tooth sheets are distributed on the outer circumference of the inner circular ring at equal angles, one end, close to the inner circular ring, of each first tooth sheet is connected with the inner circular ring into a whole through a first connecting portion, a groove opening portion is reserved between every two adjacent first tooth sheets, an opening portion is reserved at one end, far away from the inner circular ring, between every two adjacent first tooth sheets, a boss portion is arranged, and the boss portions and the first inner circular ring are integrally formed;
the second punching sheet comprises a second inner circular ring, four second tooth sheets and four third tooth sheets, the four second tooth sheets and the four third tooth sheets are equiangularly and alternately distributed on the outer circumference of the second inner circular ring, a groove part is reserved between every two adjacent second tooth sheets and the three tooth sheets, one end, close to the second inner circular ring, of each second tooth sheet is integrally formed with the second inner circular ring through a first connecting part, the third tooth sheets and the second inner circular ring are in a separated state, and an opening part is reserved at one end, far away from the second inner circular ring, of each second tooth sheet and one end, far away from the second inner circular ring, of each third tooth sheet;
the plurality of second punching sheets are axially stacked together to form a first iron core part, the adjacent second punching sheets rotate by 45 degrees when being stacked, two ends of the first iron core part are respectively provided with at least one first punching sheet, and the number of the first punching sheets arranged at two ends of the first iron core part is equal.
The first tooth piece, the second tooth piece and the third tooth piece are of the same structure and are of fan-shaped structures.
And through holes corresponding in position are formed in the first tooth piece, the second tooth piece and the third tooth piece.
The first punching sheet and the second punching sheet form a second iron core part, and one end of the second iron core part is provided with a third punching sheet;
the third punching sheet comprises a first inner circular ring and eight first tooth sheets, the structure and the connection mode of the first inner circular ring and the eight first tooth sheets of the third punching sheet are the same as those of the first punching sheet, and one ends, far away from the first inner circular ring, of the two adjacent first tooth sheets are connected into a whole through a second connection part.
The invention provides a rotor core for a permanent magnet brushless direct current 8P motor, which has the beneficial effects that: the third punching sheet is used on one side to strengthen the connection strength of the iron core, the second punching sheet rotates 45 degrees when being laminated, the structure of cutting off the magnetic isolation bridge is formed while the strength of the iron core is ensured, and the output efficiency of the motor, the utilization rate of rotor magnetic steel and the power density of the motor are improved.
Drawings
FIG. 1 is a schematic structural diagram of a first punching sheet of the invention;
FIG. 2 is a schematic structural diagram of a second punching sheet of the present invention;
FIG. 3 is a schematic structural diagram of a third punching sheet according to the present invention;
FIG. 4 is a schematic overall perspective view of the present invention;
FIG. 5 is an enlarged view of the portion A of FIG. 4;
FIG. 6 is an enlarged partial schematic view of FIG. 4;
fig. 7 is a schematic illustration of the blade dimensions.
In the figure: the punching die comprises a first inner circular ring 1, a first connecting portion 2, a boss portion 3, an opening portion 4, a notch portion 5, a first tooth 6, a through hole 7, a first punching piece 8, a second connecting portion 9, a third punching piece 10, a second inner circular ring 11, a second punching piece 12, a second tooth 13 and a third tooth 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-7, a rotor core for a permanent magnet brushless dc 8P motor includes a plurality of first stamped sheets 8 and a plurality of second stamped sheets 12, the first stamped sheets 8 include an inner ring 1 and eight first teeth 6, the eight first teeth 6 are distributed on the outer circumference of the inner ring 1 at equal angles, one end of each first tooth 6 close to the inner ring 1 is connected with the inner ring 1 into a whole through a first connecting portion 2, a slot portion 5 is reserved between adjacent first teeth 6, an opening portion 4 is reserved at one end of each adjacent first tooth 6 far from the inner ring 1, a boss portion 3 is arranged between every two adjacent first teeth 6, and the boss portion 3 and the first inner ring 1 are integrally formed;
the second punching sheet 12 comprises a second inner circular ring 11, four second tooth sheets 13 and four third tooth sheets 14, the four second tooth sheets 13 and the four third tooth sheets 14 are equiangularly and alternately distributed on the outer circumference of the second inner circular ring 11, a groove part 5 is reserved between the adjacent second tooth sheets 13 and the third tooth sheets 14, one end, close to the second inner circular ring 11, of each second tooth sheet 13 is integrally formed with the second inner circular ring 11 through a first connecting part 2, the third tooth sheets 14 and the second inner circular ring 11 are in a separated state, and an opening part 4 is reserved at one end, far away from the second inner circular ring 11, of each second tooth sheet 13 and the corresponding third tooth sheets 14;
a plurality of second punching sheet 12 axial is folded and is pressed together and form first iron core portion, adjacent second punching sheet 12 rotates 45 when overlying, first iron core portion both ends respectively are equipped with at least one first punching sheet 8, the first punching sheet 8 quantity of arranging in first iron core portion both ends equals, first tooth 6, second tooth 13, third tooth 14 structure is the same and is fan-shaped structure, first tooth 6, second tooth 13, all set up the corresponding through-hole 7 in position on the third tooth 14, the diameter is 3mm, through-hole 7 is in the middle of the tooth centre, through-hole 7 is circular, the through-hole centre of a circle is 39mm apart from the inner ring centre of a circle, first punching sheet 8, second punching sheet 12, third punching sheet 10 are stamping forming once, the internal diameter of first inner ring 1 and second inner ring 11 is 8mm, the external diameter is 12 mm.
The first punching sheet 8 and the second punching sheet 12 form a second iron core part, and one end of the second iron core part is provided with a third punching sheet 10;
the third punching sheet 10 comprises a first inner circular ring 1 and eight first teeth 6, the structure and the connection mode of the first inner circular ring 1 and the eight first teeth 6 of the third punching sheet 10 are the same as those of the first punching sheet 8, and one ends, far away from the first inner circular ring 1, of the two adjacent first teeth 6 are connected into a whole through a second connection part 9.
The third punching sheet 10 is used for reinforcing the connection strength of the iron core on one side, the second punching sheet 12 rotates 45 degrees when being laminated, the structure for cutting off the magnetic isolation bridge is formed while the strength of the iron core is ensured, and the output efficiency of the motor, the utilization rate of rotor magnetic steel and the power density of the motor are improved.
The inner diameters of the second inner ring 11 and the first inner ring 1 are both 8mm, and the outer diameters thereof are 12 mm. The outer diameter of the first inner circular ring 1 is provided with 8 small conical bosses (namely boss parts 3 in the figure), each height is 2.1mm, and the distance between the conical bottoms of the small bosses is 1.4 mm.
Referring to fig. 7, the tooth sheets of the three punching sheets are all of a fan-shaped structure, the tooth tops are outer circle bodies, the diameters of the tooth tops are 50.2mm, the tooth tops are intersected with arcs, 13.1mm away from the circle center, and the radius of each arc is 12mm, and the arc with the diameter of 50.2mm is cut, and the angle of each arc is 9.2 degrees. The tooth bottom has a width of 0.6mm and extends to a circular arc having a diameter of 12mm (i.e., the first connecting portion 2 has a width of 0.6 mm).
The special-shaped groove is formed by two parts, wherein a body is rectangular, the distance from the outer edge of the rectangle to the circle center of the circular ring is 23.4mm, the width of the rectangular groove is 5mm, and the length of the rectangular groove is 15.3 mm.
The opening part 4 is in a convex shape, the small end faces the circle center, and is 23.4mm, 3.5mm, 0.5mm and 5.9mm away from the circle center of the circular ring, and the width of the large end is intersected with the circle 12mm away from the upper excircle of the tooth sheet.
The boss part 3 on the first inner circular ring 1 is cut by a circle with the diameter of 13mm to obtain a second inner circular ring 11, the height of a small boss on the second inner circular ring 11 is 0.5mm, and the first connecting part 2 on the first tooth piece 6 is cut by the circles with the diameters of 12mm and 14.86mm to obtain a third tooth piece 14.
One side of the second connecting part 9 close to the notch part 5 is of a trapezoidal structure, the distance from the lower bottom edge of the trapezoid to the circle center of the ring is 47.8mm, the width of the lower bottom edge of the trapezoid is 2.6mm, the width of the upper bottom edge of the trapezoid is 1mm, and the height of the trapezoid is 0.4 mm.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any technical solutions, concepts and designs obtained by equivalent substitutions or changes of the technical solutions and the inventive concepts of the present invention by those skilled in the art within the technical scope of the present invention shall be covered by the scope of the present invention.
Claims (6)
1. A rotor core for a permanent magnet brushless direct current 8P motor is characterized by comprising a plurality of first punching sheets (8) and a plurality of second punching sheets (12), the first punching sheet (8) comprises an inner circular ring (1) and eight first tooth sheets (6), the eight first tooth sheets (6) are distributed on the outer circumference of the inner circular ring (1) at equal angles, one end, close to the inner ring (1), of each first tooth piece (6) is connected with the inner ring (1) into a whole through a first connecting portion (2), a groove opening portion (5) is reserved between every two adjacent first tooth pieces (6), an opening portion (4) is reserved at one end, far away from the inner ring (1), between every two adjacent first tooth pieces (6), a boss portion (3) is arranged between every two adjacent first tooth pieces (6), and the boss portion (3) and the first inner ring (1) are integrally formed;
the second punching sheet (12) comprises a second inner circular ring (11), four second tooth sheets (13) and four third tooth sheets (14), the four second tooth sheets (13) and the four third tooth sheets (14) are equiangularly and alternately distributed on the outer circumference of the second inner circular ring (11), a groove part (5) is reserved between the adjacent second tooth sheets (13) and the adjacent third tooth sheets (14), one end, close to the second inner circular ring (11), of each second tooth sheet (13) is integrally formed with the second inner circular ring (11) through a first connecting part (2), the third tooth sheets (14) and the second inner circular ring (11) are in a separated state, and an opening part (4) is reserved at one end, far away from the second inner circular ring (11), of each second tooth sheet (13) and each third tooth sheet (14);
a plurality of second punching sheet (12) axial is folded and is pressed together and form first iron core portion, and adjacent second punching sheet (12) are rotatory 45 when folding, first iron core portion both ends respectively are equipped with at least one first punching sheet (8), and the first punching sheet (8) quantity of arranging first iron core portion both ends in equals.
2. The rotor core for a permanent magnet brushless direct current (8P) motor according to claim 1, wherein the first tooth piece (6), the second tooth piece (13) and the third tooth piece (14) are identical in structure and are all fan-shaped.
3. The rotor core for the permanent magnet brushless direct current 8P motor according to claim 2, wherein the first tooth piece (6), the second tooth piece (13) and the third tooth piece (14) are provided with through holes (7) with corresponding positions.
4. The rotor core for the permanent magnet brushless direct current 8P motor according to claim 2, wherein the first punching sheet (8) and the second punching sheet (12) form a second core part, and one end of the second core part is provided with a third punching sheet (10);
the third punching sheet (10) comprises a first inner ring (1) and eight first teeth (6), the structures and the connection modes of the first inner ring (1) and the eight first teeth (6) of the third punching sheet (10) are the same as those of the first punching sheet (8), and one ends, far away from the first inner ring (1), of two adjacent first teeth (6) are connected into a whole through a second connecting portion (9).
5. The rotor core for the permanent magnet brushless direct current 8P motor according to claim 1, wherein the first punching sheet (8), the second punching sheet (12) and the third punching sheet (10) are all formed by one-time punching.
6. The rotor core for a permanent magnet brushless direct current (8P) motor according to claim 1, wherein the first inner ring (1) and the second inner ring (11) both have an inner diameter of 8mm and an outer diameter of 12 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010724225.7A CN111769671A (en) | 2020-07-24 | 2020-07-24 | Rotor core for permanent magnet brushless direct current 8P motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010724225.7A CN111769671A (en) | 2020-07-24 | 2020-07-24 | Rotor core for permanent magnet brushless direct current 8P motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111769671A true CN111769671A (en) | 2020-10-13 |
Family
ID=72727224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010724225.7A Withdrawn CN111769671A (en) | 2020-07-24 | 2020-07-24 | Rotor core for permanent magnet brushless direct current 8P motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111769671A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023000474A1 (en) * | 2021-07-20 | 2023-01-26 | 广东威灵电机制造有限公司 | Rotor structure, electric motor structure, and clothing treating device |
| WO2023045264A1 (en) * | 2021-09-27 | 2023-03-30 | 佛山市威灵洗涤电机制造有限公司 | Rotor structure, electric motor structure, and electronic device |
-
2020
- 2020-07-24 CN CN202010724225.7A patent/CN111769671A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023000474A1 (en) * | 2021-07-20 | 2023-01-26 | 广东威灵电机制造有限公司 | Rotor structure, electric motor structure, and clothing treating device |
| WO2023045264A1 (en) * | 2021-09-27 | 2023-03-30 | 佛山市威灵洗涤电机制造有限公司 | Rotor structure, electric motor structure, and electronic device |
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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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201013 |
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| WW01 | Invention patent application withdrawn after publication |