CN219145225U - Low-thrust fluctuation alternating pole permanent magnet linear motor - Google Patents
Low-thrust fluctuation alternating pole permanent magnet linear motor Download PDFInfo
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- CN219145225U CN219145225U CN202320131658.0U CN202320131658U CN219145225U CN 219145225 U CN219145225 U CN 219145225U CN 202320131658 U CN202320131658 U CN 202320131658U CN 219145225 U CN219145225 U CN 219145225U
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Abstract
The utility model relates to the field of permanent magnet linear motors and discloses a low-thrust fluctuation alternating pole permanent magnet linear motor, which is characterized by comprising a stator and a rotor which is positioned above the stator and can move along the length direction of the stator, wherein a gap is arranged between the upper surface of the stator and the lower surface of the rotor, and the front part and the rear part are formed in the same group of teeth by arranging the interval distance between straight teeth and the interval distance between two adjacent groups of teeth, so that the structure is biased, the cogging force is weakened, and the thrust fluctuation is further reduced, and the thrust fluctuation is reduced under the condition that the end part of the whole structure is not increased, the length of the motor is not greatly increased.
Description
Technical Field
The utility model relates to the field of permanent magnet linear motors, in particular to a low-thrust-fluctuation alternating-pole permanent magnet linear motor.
Background
The permanent magnet linear motor has the advantages of high efficiency, quick response, high power density and the like, and has wide application in the fields of automation, semiconductor equipment, numerical control machine tools, rail transit and the like;
in China patent grant publication No.: in CN201510163666.3, the utility model has the characteristic of effectively inhibiting the thrust pulsation of the linear motor by inhibiting the magnetic resistance and the tooth slot force at the end part;
however, the linear motor of the utility model adopts too many permanent magnets, which limits the large-scale application of the linear motor, and in addition, the structure that auxiliary teeth are added at the two ends of the iron core to restrain the end force of the linear motor lengthens the whole length of the linear motor, thereby increasing the whole length of the equipment.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a low-thrust-fluctuation alternating-pole permanent magnet linear motor which is used for reducing thrust fluctuation and reducing the use of permanent magnets under the condition of not adding additional teeth at the end part and not greatly increasing the length of the motor.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a low thrust fluctuation is utmost point permanent magnet linear electric motor in turn, includes the stator and is located the stator top and can follow the rotor that the length direction of stator removed is provided with the clearance between stator upper surface and the rotor lower surface, the stator includes yoke, permanent magnet and magnetic conduction iron plate, the permanent magnet with magnetic conduction iron plate mutual interval set up in on the yoke, adjacent two interval distance between the permanent magnet is a, the rotor includes a plurality of group tooth group, the tooth group includes six straight teeth, twine the coil on the straight tooth, wherein, the interval distance between first straight tooth and second straight tooth, second straight tooth and third straight tooth, fourth straight tooth and fifth straight tooth and the sixth straight tooth equals to be 2a/3, the interval distance between third straight tooth and the fourth straight tooth is 5a/6, the interval distance between two adjacent group tooth groups is 2a/3.
As a further improvement of the present utility model, the yoke is integrally formed with the magnetically permeable iron block.
As a further improvement of the utility model, the magnetic conductive iron block is formed by laminating silicon steel sheets.
As a further improvement of the utility model, the permanent magnet and the magnetic conductive iron block are both obliquely arranged.
As a further improvement of the utility model, the magnetic yoke and the magnetic conductive iron block are integrally formed by laminating silicon steel sheets.
As a further improvement of the utility model, the value of a is 20mm.
The utility model has the beneficial effects that: according to the utility model, the front part and the rear part are formed in the same group of teeth by setting the interval distance between the straight teeth and the interval distance between the two adjacent groups of teeth, and the a/6 interval exists between the front part and the rear part, so that the structure is biased, the tooth slot force is weakened, and the thrust fluctuation is further reduced, so that the thrust fluctuation is reduced under the condition that the end part of the whole structure is not increased, the length of a motor is not greatly increased, and the additional teeth are not added.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a cross-sectional view of the present utility model;
fig. 3 is a schematic view of the structure at the stator in the present utility model.
Reference numerals: 1. a stator; 11. a yoke; 12. a permanent magnet; 13. a magnetically conductive iron block; 2. a mover; 21. straight teeth; 3. a coil.
Detailed Description
The utility model will now be described in further detail with reference to the drawings and examples. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
Referring to fig. 1 to 3, a low thrust fluctuation alternating pole permanent magnet linear motor of the present embodiment includes a stator 1 and a mover 2 located above the stator 1 and movable along a length direction of the stator 1, a gap is provided between an upper surface of the stator 1 and a lower surface of the mover 2, the stator 1 includes a yoke 11, a permanent magnet 12 and a magnetically conductive iron block 13, the permanent magnet 12 and the magnetically conductive iron block 13 are disposed on the yoke 11 at intervals, usage amount of the permanent magnet is reduced, an interval distance between two adjacent permanent magnets 12 is a, a has a value of 20mm, the mover 2 includes a plurality of sets of teeth, each set of teeth includes six straight teeth 21, a coil 3 is wound on each straight tooth 21, each of the six straight teeth 21 is sequentially a first straight tooth 21, a second straight tooth 21, a third straight tooth 21, a fourth straight tooth 21 and a sixth straight tooth 21 from beginning to end, the first straight tooth 21 and the second straight tooth 21, the second straight tooth 21 and the third straight tooth 21, the fourth straight tooth 21 and the fifth straight tooth 21, and the interval between the fifth straight tooth 21 and the sixth straight tooth 21 are equal, and are 2a/3, the interval between the third straight tooth 21 and the fourth straight tooth 21 is 5a/6, the interval between the adjacent two sets of teeth is 2a/3, in the same set of teeth, the first straight tooth 21, the second straight tooth 21, and the third straight tooth 21 can be divided into front portions, the fourth straight tooth 21, the fifth straight tooth 21, and the sixth straight tooth 21 are divided into rear portions, in the front portions, the interval between the adjacent two straight teeth 21 is equal, and is 2a/3, in the rear portions, the interval between the adjacent two straight teeth 21 is equal, and is also 2a/3, when the front portions and the rear portions all form a three-slot structure with the stator 1, that is, the number of the permanent magnets on the secondary side is 4, the number of grooves corresponding to the primary stages is 3, so that the thrust fluctuation is small, and the average thrust is increased;
in addition, a/6 distance exists between the front part and the rear part, so that the structure is offset, the tooth space force is weakened, and further the thrust fluctuation is reduced, and the thrust fluctuation is reduced under the condition that the end part of the whole structure is not added with additional teeth and the length of the motor is not greatly increased.
The magnet yoke 11 and the magnetic conductive iron block 13 are integrally formed, so that the magnet yoke 11 and the magnetic conductive iron block 13 are obtained through integral processing, and the processing is convenient.
The magnetic conductive iron block 13 is formed by laminating silicon steel sheets, so that efficiency reduction and heating of the magnetic conductive iron block 13 due to eddy current effect can be avoided.
The permanent magnet 12 and the magnetic conductive iron block 13 are all obliquely arranged, the permanent magnet 12 and the magnetic conductive iron block 13 are mutually parallel, the magnetic conductive iron block is obliquely arranged between the magnetic conductive iron block and the magnetic yoke 11, an included angle is formed between the length direction of the permanent magnet 12 and the length direction of the magnetic yoke 11, the included angle is not 90 degrees, and the tooth slot force can be reduced through an oblique arrangement mode, so that thrust fluctuation is further reduced.
The magnet yoke 11 and the magnetic conductive iron block 13 are integrally formed by laminating silicon steel sheets.
The above is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.
Claims (6)
1. The utility model provides a low thrust fluctuation alternate pole permanent magnet linear motor, includes stator (1) and is located stator (1) top and can follow rotor (2) that stator (1) length direction removed, its characterized in that: the stator (1) upper surface with be provided with the clearance between rotor (2) lower surface, stator (1) include yoke (11), permanent magnet (12) and magnetic conduction iron plate (13), permanent magnet (12) with magnetic conduction iron plate (13) each other the interval set up in on yoke (11), adjacent two interval distance between permanent magnet (12) is a, rotor (2) include a plurality of group tooth group, tooth group includes six straight teeth (21), twine coil (3) on straight teeth (21), wherein, first straight teeth (21) and second straight teeth (21), second straight teeth (21) and third straight teeth (21), fourth straight teeth (21) and fifth straight teeth (21) and sixth straight teeth (21) interval distance equals to be 2a/3, interval distance between third straight teeth (21) and fourth straight teeth (21) is 5a/6, interval distance between adjacent two groups of teeth (2 a/3.
2. The low-thrust-ripple alternating-pole permanent magnet linear motor of claim 1, wherein: the magnet yoke (11) and the magnetic conductive iron block (13) are integrally formed.
3. The low-thrust-ripple alternating-pole permanent magnet linear motor of claim 2, wherein: the magnetic conductive iron block (13) is formed by laminating silicon steel sheets.
4. A low thrust ripple alternating pole permanent magnet linear motor according to claim 3, wherein: the permanent magnet (12) and the magnetic conductive iron block (13) are obliquely arranged.
5. A low thrust ripple alternating pole permanent magnet linear motor according to claim 3 or 4, wherein: the magnetic yoke (11) and the magnetic conductive iron block (13) are integrally formed by laminating silicon steel sheets.
6. The low-thrust-ripple alternating-pole permanent magnet linear motor of claim 1, wherein: the value of a is 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320131658.0U CN219145225U (en) | 2023-01-18 | 2023-01-18 | Low-thrust fluctuation alternating pole permanent magnet linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320131658.0U CN219145225U (en) | 2023-01-18 | 2023-01-18 | Low-thrust fluctuation alternating pole permanent magnet linear motor |
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| Publication Number | Publication Date |
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| CN219145225U true CN219145225U (en) | 2023-06-06 |
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| CN202320131658.0U Active CN219145225U (en) | 2023-01-18 | 2023-01-18 | Low-thrust fluctuation alternating pole permanent magnet linear motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116780850A (en) * | 2023-08-24 | 2023-09-19 | 中国科学院宁波材料技术与工程研究所 | Primary modularized secondary bias structure permanent magnet synchronous linear motor and optimization method thereof |
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2023
- 2023-01-18 CN CN202320131658.0U patent/CN219145225U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116780850A (en) * | 2023-08-24 | 2023-09-19 | 中国科学院宁波材料技术与工程研究所 | Primary modularized secondary bias structure permanent magnet synchronous linear motor and optimization method thereof |
| CN116780850B (en) * | 2023-08-24 | 2024-01-09 | 中国科学院宁波材料技术与工程研究所 | Primary modularized secondary bias structure permanent magnet synchronous linear motor and optimization method thereof |
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