CN109245366B - Motor rotor punching sheet and permanent magnet synchronous motor adopting same - Google Patents
Motor rotor punching sheet and permanent magnet synchronous motor adopting same Download PDFInfo
- Publication number
- CN109245366B CN109245366B CN201811378885.3A CN201811378885A CN109245366B CN 109245366 B CN109245366 B CN 109245366B CN 201811378885 A CN201811378885 A CN 201811378885A CN 109245366 B CN109245366 B CN 109245366B
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- magnetic steel
- force line
- line guide
- magnetic force
- guide hole
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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
-
- 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
-
- 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
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a motor rotor punching sheet and a permanent magnet synchronous motor adopting the same, wherein the motor rotor punching sheet is provided with magnetic steel to form a double-one structure so as to fully utilize the magnetic steel to generate magnetic flux, and the width and the thickness of an upper magnetic steel groove are smaller than those of a lower magnetic steel groove; the invention forms a proper magnetic circuit through the magnetic line guide holes with specific structure, specific position and specific size, can improve wide speed regulation range, generates stable magnetic lines, and meets the requirements of motor punching strength during high-speed operation; the demagnetizing and magnetic leakage of the magnetic steel are low, the utilization rate of the magnetic steel is high, and the power density of the motor is high.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor rotor punching sheet and a permanent magnet synchronous motor adopting the same, which are applied to the technical field of new energy automobiles using a modern permanent magnet synchronous motor as power drive.
Background
In the technical field of electric automobile driving motors, high power density, high torque and high speed have become a trend. The structure of the motor rotor punching sheet directly influences the motor efficiency, the motor performance and the like. The motor rotor punching sheet manufactured by the prior art can not meet the requirement of a wide speed regulation range. The magnetic force lines generated are unstable, and the strength of the rotor punching sheet can not meet the mechanical strength requirement when the motor runs at high speed. In the design of the prior art multilayer magnetic steel, the demagnetizing and magnetic leakage of the magnetic steel are higher, so that the utilization rate of the magnetic steel is lower, and the power density of the motor is reduced.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide a motor rotor punching sheet and a permanent magnet synchronous motor adopting the same, which can improve a wide speed regulation range, generate stable magnetic lines of force, meet the requirements on the strength of the motor punching sheet during high-speed operation, and have the advantages of lower demagnetization and magnetic leakage of magnetic steel, higher utilization rate of the magnetic steel and high power density of the motor.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a motor rotor punching sheet comprises a central rotating shaft hole part III, a plurality of duplicate removal holes II uniformly distributed on the peripheral ring of the rotating shaft hole part III, and a plurality of magnetic steel mechanism parts I uniformly distributed on the peripheral ring of the duplicate removal holes II;
each magnetic steel mechanism part I comprises a first magnetic force line guide hole 1, a second magnetic force line guide hole 2, a third magnetic force line guide hole 3, a fourth magnetic force line guide hole 4, an upper magnetic steel groove 5 and a lower magnetic steel groove 6; wherein the upper magnetic steel groove 5 is positioned at the middle upper part of the magnetic steel mechanism part I, the fourth magnetic force line guide hole 4 is positioned at the upper part of the upper magnetic steel groove 5 and is deviated to two sides, the third magnetic force line guide hole 3 is positioned at the lower part of the second magnetic force line guide hole 2, the two ends of the upper magnetic steel groove 5 are respectively provided with the third magnetic force line guide hole 3 and the second magnetic force line guide hole 2, the outer parts of the third magnetic force line guide hole 3 and the second magnetic force line guide hole 2 at the two ends are provided with the first magnetic force line guide hole 1, the lower magnetic steel groove 6 is positioned at the lower part between the two first magnetic force line guide holes 1, the two first magnetic force line guide holes 1 and the lower magnetic steel groove 6 form a layer which surrounds the second magnetic force line guide hole 2, the third magnetic force line guide hole 3, the fourth magnetic force line guide hole 4 and the upper magnetic steel groove 5, and the two first magnetic force line guide holes 1 and the lower magnetic steel groove 6 are one layer or multiple layers; the position of the upper magnetic steel 10 in the upper magnetic steel groove 5 is rectangular, the position of the lower first magnetic steel 9 and the lower second magnetic steel 11 in the lower magnetic steel groove 6 is rectangular, and the part between the lower first magnetic steel 9 and the lower second magnetic steel 11 in the lower magnetic steel groove 6 is added with the reinforcing rib 7; the adjacent magnetic steel mechanism parts I form a magnetic separation bridge 8.
The sides of the rectangle of the lower magnetic steel groove 6, which are added with the reinforcing ribs 7, are radial sides, and the sides of the rectangle perpendicular to the radial sides are non-radial sides;
the first magnetic force line guide hole 1 is a quadrilateral hole, the side at the outer side of the first magnetic force line guide hole 1 is parallel to the peripheral ring of the motor rotor punching sheet, the distance between the side opposite to the side at the outer side and the side closest to the lower magnetic steel groove 6 are parallel to each other, and the distance between the two sides meets the mechanical strength requirement; the opening angles of the other two opposite sides are adjusted according to the trend of the magnetic force lines, and the whole body shows the trend of gradually increasing the width from the peripheral ring to the circle center direction;
the second magnetic force line guide hole 2 is a quadrilateral hole, the side of the second magnetic force line guide hole 2, which is close to the outer circle of the motor rotor punching sheet, is parallel to the outer circle of the motor rotor punching sheet, the distance between the second magnetic force line guide hole 2 and the outer circle meets the mechanical strength requirement, and the side, which is opposite to the side of the second magnetic force line guide hole 2, which is close to the outer circle of the motor rotor punching sheet, is parallel to the non-radial side of the lower magnetic steel groove 6 and is connected with the rest two sides of the second magnetic force line guide hole 2 through two round corners with adjustable sizes; the remaining two sides of the second magnetic force line guiding hole 2 are parallel to the side closest to the first magnetic force line guiding hole 1;
the third magnetic force line guide hole 3 is positioned between the upper magnetic steel groove 5 and the lower magnetic steel groove 6 and is close to the two sides of the upper magnetic steel groove 5, the basic shape is L-shaped, and the shape is adjusted according to the trend of magnetic force lines when the mechanical condition requirement is met; the edge of the third magnetic force line guide hole 3, which is close to the middle position of the lower first magnetic steel 9, is parallel to the radial edge of the lower magnetic steel groove 6, the two edges connected with the edge, which is close to the middle position of the lower first magnetic steel 9, are parallel to the non-radial edge of the magnetic steel groove 6, and are connected with two arcs, the edge, which is close to the outer periphery of the motor rotor punching sheet, of the third magnetic force line guide hole 3 is parallel to the edge, which is closest to the second magnetic force line guide hole 2, and the distance meets the mechanical strength requirement;
the fourth magnetic force line guide hole 4 is basically shaped into a triangular hole, a round angle is added at the vertex, the edge of the fourth magnetic force line guide hole 4, which is close to the outer circle of the motor rotor punching sheet, is parallel to the outer circle of the punching sheet, the space between the fourth magnetic force line guide hole 4 and the upper magnetic steel groove 5 meets the mechanical strength requirement;
the width and thickness of the rectangle in the upper magnetic steel groove 5 are smaller than those in the lower magnetic steel groove 6; the two sides of the upper magnetic steel groove 5, which are except for the position where the upper magnetic steel 10 is placed, are provided with residual holes, so that magnetic leakage can be effectively reduced, the demagnetizing risk of the sharp corners of the magnetic steel is reduced, and the upper magnetic steel 10 is fixed in terms of mechanical structure. The two sides of the lower magnetic steel groove 6, which are removed from the positions where the lower first magnetic steel 9 and the lower second magnetic steel 11 are placed, are provided with residual holes, and the shape of the residual holes is correspondingly adjusted according to the trend of magnetic lines of force and the strength of a rotor punching sheet.
The two circular arcs of the duplicate removal holes II, which are close to the outer diameter and the circle center of the rotor punching sheet, are concentric with the outer circle of the motor rotor punching sheet, the radial edges formed by the duplicate removal holes II which are uniformly distributed are mutually parallel, and the distance meets the mechanical strength requirement.
Two key grooves 12 which are opposite in position are arranged in the rotating shaft hole part III, each key groove is rectangular or trapezoidal, and the position of each key groove is opposite to the position between two adjacent weight removing holes II; the key groove 12 is used for positioning with the rotating shaft, and meanwhile, the key groove 12 also plays a role in positioning when the rotor punching sheet is overlapped.
The number of the duplicate removal holes II is twelve.
The width of the reinforcing ribs 7 is 0.6-1.2mm.
A permanent magnet synchronous motor comprises the motor rotor punching sheet.
Compared with the prior art, the invention has the beneficial effects that:
the invention can improve wide speed regulating range, generate stable magnetic force lines and meet the requirement of motor punching strength during high-speed operation due to the design of the magnetic force line guide holes with special shapes and layout and the multi-layer magnetic steel. The demagnetizing and leakage of the magnetic steel due to the special design of the magnetic steel groove are low, the utilization rate of the magnetic steel is high, and the power density of the motor is high.
Drawings
Fig. 1 is a schematic view of a motor rotor sheet structure according to the present invention.
Fig. 2 is an enlarged view of a part of the magnetic steel mechanism section i in the motor rotor sheet structure of the present invention.
Fig. 3 is a schematic diagram of a motor rotor sheet structure assembled with magnetic steel.
Fig. 4 is a partial enlarged view of the shaft hole portion iii.
Fig. 5 is a schematic view of another motor rotor sheet structure of the present invention.
Fig. 6 is an enlarged view of a portion of a magnetic steel mechanism i in another motor rotor sheet structure of the present invention.
Detailed Description
The invention will be described in detail below with reference to the drawings and the specific embodiments.
In this description, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as implying or indicating relative importance or implicitly indicating the number of features shown. The circle center is the circle center of the circumference of the rotor punching sheet, the part close to the circumference of the rotor punching sheet is the outer side, the part close to the circumference of the rotor punching sheet is the inner side, the part close to the circumference of the rotor punching sheet is the upper part, and the part close to the circumference of the rotor punching sheet is the lower part.
As shown in fig. 1, 2, 3 and 4, the motor rotor punching sheet in this embodiment includes a central shaft hole portion iii, a plurality of duplication eliminating holes ii uniformly distributed on the outer periphery of the shaft hole portion iii, and a plurality of magnetic steel mechanism portions i uniformly distributed on the outer periphery of the duplication eliminating holes ii.
Preferably, the 12 magnetic steel mechanism parts I are uniformly distributed along the circumference.
Each magnetic steel mechanism part I comprises a first magnetic force line guide hole 1, a second magnetic force line guide hole 2, a third magnetic force line guide hole 3, a fourth magnetic force line guide hole 4, an upper magnetic steel groove 5 and a lower magnetic steel groove 6; wherein, the upper magnetic steel groove 5 is located at the middle upper part of the magnetic steel mechanism part I, the fourth magnetic force line guiding hole 4 is located at the upper part of the upper magnetic steel groove 5 and is deviated to two sides, the third magnetic force line guiding hole 3 is located at the lower part of the second magnetic force line guiding hole 2, the two ends of the upper magnetic steel groove 5 are provided with the third magnetic force line guiding hole 3 and the second magnetic force line guiding hole 2, the outer parts of the third magnetic force line guiding hole 3 and the second magnetic force line guiding hole 2 at the two ends are provided with the first magnetic force line guiding hole 1, the lower magnetic steel groove 6 is located at the lower part between the two first magnetic force line guiding holes 1, and in the embodiment, the two first magnetic force line guiding holes 1 and the lower magnetic steel groove 6 are one layer.
The position of placing upper portion magnet steel 10 in upper portion magnet steel groove 5 is the rectangle, and the position of placing lower part first magnet steel 9 and lower part second magnet steel 11 in lower part magnet steel groove 6 is the rectangle, and the part of placing between lower part first magnet steel 9 and the lower part second magnet steel 11 in lower part magnet steel groove 6 has increased strengthening rib 7, and the limit that increases strengthening rib 7 in the rectangle of lower part magnet steel groove 6 is radial limit, and the rectangle limit that is perpendicular with radial limit is non-radial limit.
The first magnetic force line guide hole 1 is a quadrilateral hole, the side at the outer side of the first magnetic force line guide hole 1 is parallel to the peripheral ring of the motor rotor punching sheet, the distance between the side opposite to the side at the outer side and the side closest to the lower magnetic steel groove 6 are parallel to each other, and the distance between the two sides meets the mechanical strength requirement; the opening angles of the other two opposite sides are adjusted according to the trend of the magnetic force lines, and the whole body shows the trend of gradually increasing the width from the peripheral ring to the circle center direction. Two opposite sides of the magnetism isolating bridge 8 formed by the adjacent first magnetic force line guiding holes 1 are parallel.
The second magnetic force line guide hole 2 and the third magnetic force line guide hole 3 can be reasonably distributed according to the size of the motor rotor punching sheet under the condition that a magnetic circuit is not influenced.
The second magnetic force line guide hole 2 is a quadrilateral hole, the side of the second magnetic force line guide hole 2, which is close to the outer circle of the motor rotor punching sheet, is parallel to the outer circle of the motor rotor punching sheet, the distance between the second magnetic force line guide hole 2 and the outer circle meets the mechanical strength requirement, and the side, which is opposite to the side of the second magnetic force line guide hole 2, which is close to the outer circle of the motor rotor punching sheet, is parallel to the non-radial side of the lower magnetic steel groove 6 and is connected with the rest two sides of the second magnetic force line guide hole 2 through two round corners with adjustable sizes; the remaining two sides of the second magnetic force line guiding hole 2 are parallel to the side closest to the first magnetic force line guiding hole 1.
The third magnetic force line guide hole 3 is positioned between the upper magnetic steel groove 5 and the lower magnetic steel groove 6 and is close to the two sides of the upper magnetic steel groove 5, the basic shape is L-shaped, and the shape is adjusted according to the trend of magnetic force lines when the mechanical condition requirement is met; the edge of the third magnetic force line guide hole 3, which is close to the middle position of the lower first magnetic steel 9, is parallel to the radial edge of the lower magnetic steel groove 6, the two edges connected with the edge, which is close to the middle position of the lower first magnetic steel 9, are parallel to the non-radial edge of the magnetic steel groove 6, and are connected with two arcs, the edge, which is close to the outer periphery of the motor rotor punching sheet, of the third magnetic force line guide hole 3 is parallel to the edge, which is closest to the second magnetic force line guide hole 2, and the distance meets the mechanical strength requirement.
The fourth magnetic force line guide holes 4 are positioned at the upper part of the upper magnetic steel groove 5 and are deviated from two sides, the basic shape is triangular, round corners are added at the top points, the edges of the fourth magnetic force line guide holes 4, which are close to the outer circle of the motor rotor punching sheet, are parallel to the peripheral ring of the punching sheet, the distance between the fourth magnetic force line guide holes 4 and the upper magnetic steel groove 5 meets the mechanical strength requirement.
The upper magnetic steel groove 5 and the lower magnetic steel groove 6 are internally provided with an upper magnetic steel 10, a lower first magnetic steel 9 and a lower second magnetic steel 11, the shapes of the parts are rectangular, and the width and the thickness of the rectangle in the upper magnetic steel groove 5 are smaller than those of the rectangle in the lower magnetic steel groove 6; the two sides of the upper magnetic steel groove 5, which are except for the position where the upper magnetic steel 10 is placed, are provided with residual holes, so that magnetic leakage can be effectively reduced, the demagnetizing risk of the sharp corners of the magnetic steel is reduced, and the upper magnetic steel 10 is fixed in terms of mechanical structure. The two sides of the lower magnetic steel groove 6, which are removed from the positions where the lower first magnetic steel 9 and the lower second magnetic steel 11 are placed, are provided with residual holes, and the shape of the residual holes can be correspondingly adjusted according to the trend of magnetic lines of force and the strength of a rotor punching sheet.
The lower magnetic steel groove 6 is arranged between the lower first magnetic steel 9 and the lower second magnetic steel 11 compared with the upper magnetic steel groove 5, the reinforcing ribs 7 are added, and the overall size is larger than that of the upper magnetic steel groove 5.
As shown in fig. 3: the upper magnetic steel 10, the lower first magnetic steel 9 and the lower second magnetic steel 11 are rectangular and are respectively placed in the upper magnetic steel groove 5 and the lower magnetic steel groove 6. The lower magnetic steel groove 6 is internally provided with a reinforcing rib 7, and the width of the reinforcing rib 7 is 0.6-1.2mm. The mechanical strength of the rotor punching sheet under high-speed operation can be improved on the basis of ensuring the electromagnetic characteristics.
The rotor punching sheet comprises a plurality of weight removing holes II, and the weight removing holes II are uniformly distributed along the circumferential direction. The two circular arcs of the duplicate removal holes II, which are close to the outer diameter and the circle center of the rotor punching sheet, are concentric with the outer circle of the motor rotor punching sheet, and the radial edges formed by the duplicate removal holes II which are uniformly distributed are mutually parallel, and the distance meets the mechanical strength requirement. The shape of the duplicate removal hole II can be determined according to the mechanical strength and the processing technology. And the trend of the magnetic force lines are correspondingly adjusted.
The preferred example is that the 12 weight-removing holes II are evenly distributed along the circumference.
The magnetic bridge 8 is formed between the circumferentially evenly distributed portions of the plurality of magnetic steel mechanism portions i in the rotor sheet in this embodiment. The width of the magnetic isolation bridge 8 can be correspondingly adjusted under the condition of meeting the performance requirement, and the magnetic isolation bridge 8 can effectively reduce the magnetic leakage between poles under the condition of not influencing the main magnetic circuit.
Two key grooves 12 are arranged in the rotating shaft hole part III, the positions of the key grooves are opposite, each key groove is rectangular or trapezoidal, and the position of each key groove is opposite to the position between two adjacent weight removing holes II. The key groove 12 is used for positioning with the rotating shaft, and meanwhile, the key groove 12 also plays a role in positioning when the rotor punching sheet is overlapped.
Example two
As shown in fig. 5 and 6, in the motor rotor sheet of the present embodiment, two first magnetic force line guiding holes 1 and one lower magnetic steel groove 6 are two layers, and the rest of the structure is the same as that of the first embodiment.
The motor provided by the invention is a permanent magnet synchronous motor, and comprises the motor rotor punching sheet, wherein other parts adopt the prior art specification.
It should be noted that: the present examples are intended to be illustrative, and not restrictive, of the present invention. Although the foregoing has been modified by the illustrative embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme recorded in the invention can be modified or part or all of the technical characteristics can be replaced; such modifications and substitutions do not depart from the spirit of the invention.
Claims (5)
1. The utility model provides a motor rotor towards piece which characterized in that: the device comprises a central rotating shaft hole part (III), a plurality of weight removing holes (II) uniformly distributed on the periphery of the rotating shaft hole part (III), and a plurality of magnetic steel mechanism parts (I) uniformly distributed on the periphery of the weight removing holes (II);
each magnetic steel mechanism part (I) comprises a first magnetic force line guide hole (1), a second magnetic force line guide hole (2), a third magnetic force line guide hole (3), a fourth magnetic force line guide hole (4), an upper magnetic steel groove (5) and a lower magnetic steel groove (6); the magnetic steel mechanism comprises a magnetic steel mechanism part (I), an upper magnetic steel groove (5), a fourth magnetic force line guide hole (4), a third magnetic force line guide hole (3) and a first magnetic force line guide hole (1) and a lower magnetic force line guide hole (6), wherein the upper magnetic steel groove (5) is positioned at the middle upper part of the magnetic steel mechanism part (I), the fourth magnetic force line guide hole (4) is positioned at the upper part of the upper magnetic steel groove (5) and is deviated from the two sides, the third magnetic force line guide hole (3) is positioned at the lower part of the second magnetic force line guide hole (2), the two ends of the upper magnetic steel groove (5) are respectively provided with the third magnetic force line guide hole (3) and the second magnetic force line guide hole (2), the outer parts of the third magnetic force line guide hole (3) and the second magnetic force line guide hole (2) at the two ends are provided with the first magnetic force line guide holes (1), the lower magnetic steel groove (6) is positioned at the lower part between the two first magnetic force line guide holes (1), the two first magnetic force line guide holes (1) and the lower magnetic force line guide hole (6) form a layer, and the lower magnetic force line guide hole (6) surrounds the second magnetic force line guide hole (2), the third magnetic force line guide hole (4) and the upper magnetic steel groove (5) is one layer; the position of the upper magnetic steel (10) in the upper magnetic steel groove (5) is rectangular, the position of the lower first magnetic steel (9) and the lower second magnetic steel (11) in the lower magnetic steel groove (6) is rectangular, and a reinforcing rib (7) is added to the part between the lower first magnetic steel (9) and the lower second magnetic steel (11) in the lower magnetic steel groove (6); a magnetic separation bridge (8) is formed between adjacent magnetic steel mechanism parts (I);
the sides of the rectangle of the lower magnetic steel groove (6) added with the reinforcing ribs (7) are radial sides, and the sides of the rectangle perpendicular to the radial sides are non-radial sides;
the first magnetic force line guide hole (1) is a quadrilateral hole, the side at the outer side of the first magnetic force line guide hole (1) is parallel to the peripheral ring of the motor rotor punching sheet, the distance between the first magnetic force line guide hole and the peripheral ring meets the mechanical strength requirement, the side opposite to the side at the outer side is parallel to the side closest to the lower magnetic steel groove (6), and the distance between the two sides meets the mechanical strength requirement; the opening angles of the other two opposite sides are adjusted according to the trend of the magnetic force lines, and the whole body shows the trend of gradually increasing the width from the peripheral ring to the circle center direction;
the second magnetic force line guide hole (2) is a quadrilateral hole, the side, close to the outer circle of the motor rotor punching, of the second magnetic force line guide hole (2) is parallel to the outer circle of the motor rotor punching, the distance between the second magnetic force line guide hole and the outer circle meets the mechanical strength requirement, the side, opposite to the side, close to the outer circle of the motor rotor punching, of the second magnetic force line guide hole (2) is parallel to the non-radial side of the lower magnetic steel groove (6), and the second magnetic force line guide hole (2) is connected with the rest two sides of the second magnetic force line guide hole through two round corners with adjustable sizes; the remaining two sides of the second magnetic force line guiding hole (2) are parallel to the side closest to the first magnetic force line guiding hole (1);
the third magnetic force line guide hole (3) is positioned between the upper magnetic steel groove (5) and the lower magnetic steel groove (6) and is close to the two sides of the upper magnetic steel groove (5), the basic shape is L-shaped, and the shape is adjusted according to the trend of magnetic force lines under the condition that the mechanical condition requirement is met; the edge of the third magnetic force line guide hole (3) close to the middle position of the lower first magnetic steel (9) is parallel to the radial edge of the lower magnetic steel groove (6), the two edges connected with the edge close to the middle position of the lower first magnetic steel (9) are parallel to the non-radial edge of the magnetic steel groove (6) and are connected with two arcs, the edge of the third magnetic force line guide hole (3) close to the peripheral ring of the motor rotor punching sheet is parallel to the edge closest to the second magnetic force line guide hole (2), and the distance meets the mechanical strength requirement;
the fourth magnetic force line guide hole (4) is basically shaped into a triangular hole, a round angle is added at the vertex, the edge of the fourth magnetic force line guide hole (4) close to the excircle of the motor rotor punching sheet is parallel to the peripheral ring of the punching sheet, the distance between the fourth magnetic force line guide hole (4) and the upper magnetic steel groove (5) meets the mechanical strength requirement;
the width and the thickness of the rectangle in the upper magnetic steel groove (5) are smaller than those in the lower magnetic steel groove (6); the two sides of the upper magnetic steel groove (5) except for the position where the upper magnetic steel (10) is placed are provided with residual holes, so that magnetic leakage can be effectively reduced, the demagnetizing risk of the sharp corners of the magnetic steel is reduced, and the upper magnetic steel groove is used for fixing the position of the upper magnetic steel (10) in terms of a mechanical structure; the two sides of the lower magnetic steel groove (6) except for the positions where the lower first magnetic steel (9) and the lower second magnetic steel (11) are arranged are provided with residual holes, and the shape of the residual holes is correspondingly adjusted according to the trend of magnetic lines and the strength of a rotor punching sheet;
the two circular arcs of the duplicate removal holes (II) close to the outer diameter and the circle center of the rotor punching sheet are concentric with the outer circle of the motor rotor punching sheet, the radial edges formed by the duplicate removal holes (II) which are uniformly distributed are mutually parallel, and the distance meets the mechanical strength requirement.
2. A motor rotor as claimed in claim 1, wherein: two key grooves (12) which are opposite in position are arranged in the rotating shaft hole part III, each key groove is rectangular or trapezoidal, and the position of each key groove is opposite to the position between two adjacent duplicate removal holes (II); the key groove (12) is used for positioning with the rotating shaft, and meanwhile, the key groove (12) also plays a role in positioning when the rotor punching sheet is overlapped.
3. A motor rotor as claimed in claim 1, wherein: the number of the duplicate removal holes (II) is twelve.
4. A motor rotor as claimed in claim 1, wherein: the width of the reinforcing rib (7) is 0.6-1.2mm.
5. A permanent magnet synchronous motor, characterized in that: comprising the motor rotor sheet of any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811378885.3A CN109245366B (en) | 2018-11-19 | 2018-11-19 | Motor rotor punching sheet and permanent magnet synchronous motor adopting same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811378885.3A CN109245366B (en) | 2018-11-19 | 2018-11-19 | Motor rotor punching sheet and permanent magnet synchronous motor adopting same |
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| CN109245366A CN109245366A (en) | 2019-01-18 |
| CN109245366B true CN109245366B (en) | 2023-10-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110729830A (en) * | 2019-10-29 | 2020-01-24 | 宁波菲仕运动控制技术有限公司 | High-speed rotor punching sheet and rotor structure |
| CN113949183B (en) * | 2021-10-15 | 2023-12-29 | 浙江中车尚驰电气有限公司 | Rotor punching sheet, rotor and motor |
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