CN114530962B - Lateral stress self-resetting structure of permanent magnet linear motor - Google Patents
Lateral stress self-resetting structure of permanent magnet linear motor Download PDFInfo
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- CN114530962B CN114530962B CN202210152083.0A CN202210152083A CN114530962B CN 114530962 B CN114530962 B CN 114530962B CN 202210152083 A CN202210152083 A CN 202210152083A CN 114530962 B CN114530962 B CN 114530962B
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- permanent magnet
- linear motor
- vertical surface
- stator core
- pole permanent
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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
- H02K1/34—Reciprocating, oscillating or vibrating parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
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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)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Linear Motors (AREA)
Abstract
The invention discloses a lateral stress self-resetting structure of a permanent magnet linear motor, and relates to the technical fields of permanent magnet linear motors, linear actuators, sliding door driving and the like. The N poles and the S poles of the permanent magnets are arranged on the back iron of the mover of the linear motor in a staggered manner, and magnetic pulling force is generated in the lateral direction of the mover through dislocation of the N poles and the S poles of the permanent magnets; when the permanent magnet linear motor is laterally stressed to generate dislocation, the permanent magnet can generate tension in the opposite direction to reset the linear motor rotor. The lateral stress self-resetting structure of the permanent magnet linear motor is suitable for application occasions of linear actuation, can be particularly applied to various sliding door drives, and solves the problems of complex installation and overweight of a lateral limiting structure of a traditional linear motor. The invention solves the problem of difficult control of the lateral limit structure of the traditional linear motor through the stress self-resetting structure; further simplifying the construction of the linear drive system and reducing the weight of the linear drive system.
Description
Technical Field
The invention relates to the fields of linear electric actuation technology, sliding door driving and linear motors, in particular to a lateral stress self-resetting structure of a permanent magnet linear motor.
Background
The lateral offset of the linear motor is a common problem when the linear motor works, and can cause distortion of performance parameters such as air gap flux density, vortex, force and the like, so that the lateral displacement of the rotor is limited by a limiting structure in the traditional track type sliding door or linear electric action; the limiting structure has larger abrasion and friction loss on the rotor, and the required installation space and cost are also larger. Therefore, the invention provides a lateral stress self-resetting structure of a permanent magnet linear motor, lateral magnetic tension is provided by the staggering of the permanent magnets, the magnetic tension is increased along with the increase of lateral displacement, and the permanent magnet linear motor can be reset automatically and rapidly and has good resetting stability. The lateral magnetic pulling force is generated by the structure between the stator and the rotor, and is simpler and more efficient than other lateral magnetic pulling force reset control. The amount of permanent magnets is also reduced due to the staggered arrangement of the permanent magnets.
Disclosure of Invention
Aiming at the defects of the background technology, the invention provides a lateral stress self-resetting structure of a permanent magnet linear motor, which is suitable for the requirements of linear electric actuation and push-pull structure driving, solves the problem of difficult control of a lateral limiting structure of the traditional linear motor, further simplifies the structure of a linear driving system and reduces the weight of the linear driving system. The permanent magnet synchronous motor has the advantages of simple structure, quick response and good stability, and has the effects of reducing cost and reducing the dosage of the permanent magnet, thereby having wide market application prospect.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the side direction stress self-resetting structure of the permanent magnet linear motor is a structure that N poles and S poles of permanent magnets arranged on back iron of a rotor of the linear motor are staggered, and magnetic pulling force is generated in the side direction of the rotor through staggered convex arrangement of the N pole permanent magnets and the S pole permanent magnets on two sides of a stator core.
According to the scheme, the back iron width of the linear motor is slightly wider than the width of the stator core, and the widths of the N-pole permanent magnet and the S-pole permanent magnet are smaller than the back iron width.
Further, one side vertical surface of the N-pole permanent magnet exceeds one side vertical surface of the stator core, and the other side vertical surface of the N-pole permanent magnet does not exceed the other side vertical surface of the stator core. The vertical surface of one side of the S-pole permanent magnet exceeds the vertical surface of the other side of the stator core, namely the side which is not exceeded by the N-pole permanent magnet, and the vertical surface of the other side of the S-pole permanent magnet does not exceed the vertical surface of one side of the stator core, namely the side which is exceeded by the N-pole permanent magnet.
Further, the N pole permanent magnet and the S pole permanent magnet are square, and the edges of the permanent magnets do not exceed the edges of the back iron.
Further, notches can be formed in two sides of the stator core tooth portion, the cross section of the stator tooth in the width direction is of an inverted convex shape, and the size of the notches can be calculated and designed to amplify magnetic pulling force of two sides.
Further, the width of the permanent magnet blocks is from the vertical surface at one end of the back iron to the notch at the other side of the tooth part of the stator core, and exceeds the notch bottom but does not exceed the vertical surface at the other end of the stator core.
Further, the notch surface of the stator teeth may be a horizontal surface or an inclined surface.
Compared with the prior art, the invention has the following beneficial effects:
1. the lateral magnetic pulling force is related to the lateral dislocation distance, and the device has uncontrolled autonomous resetting capability;
2. the lateral magnetic tension response is fast, and the stability is fast after the position is restored;
3. simple structure, less permanent magnet consumption and low cost.
Drawings
FIG. 1 is a side force self-resetting structure of a permanent magnet linear motor according to the present invention;
FIG. 2 is a side force self-resetting structure of a permanent magnet linear motor according to the present invention, and is also described in detail in embodiment 1;
FIG. 3 is a front view of embodiment 1 of the present invention;
FIG. 4 is a side-to-side self-resetting structure of a permanent magnet linear motor according to the present invention, and is also described in detail in embodiment 2;
FIG. 5 is a front view of embodiment 2 of the present invention;
FIG. 6 is a graph showing the relationship between magnetic pull force on two sides and dislocation distance according to example 1 of the present invention;
FIG. 7 is a graph showing the relationship between the magnetic pull force on both sides and the dislocation distance according to example 2 of the present invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example 1
Fig. 1 is a side force self-resetting structure of a permanent magnet linear motor, as shown in the figure, permanent magnets 12 are arranged on back iron 11 of a motor rotor structure in a staggered manner; the N pole permanent magnet and the S pole permanent magnet are square, and the vertical surface of one side of the convex surface of the permanent magnet 12 does not exceed the edge of the back iron 11; as shown in fig. 2 and 3, the width of the back iron 11 of the linear motor is slightly wider than the width of the stator core 13, and the width of the permanent magnet 12 is smaller than the width of the back iron; one side vertical surface of the N-pole permanent magnet 122 exceeds one side vertical surface of the stator core 13, while the other side vertical surface of the N-pole permanent magnet 122 does not exceed the other side vertical surface of the stator core 13. One side vertical surface of the S-pole permanent magnet 121 exceeds the other side vertical surface of the stator core 13, and the other side vertical surface of the S-pole permanent magnet 121 does not exceed the one side vertical surface of the stator core 13. The magnetic pull of the unit permanent magnet groups on both sides is shown in fig. 6.
Example 2
FIG. 4 is a side force self-resetting structure of a permanent magnet linear motor according to the present invention, as shown in the figure, the mover structure is the same as that of embodiment 1; as shown in fig. 1, permanent magnets 22 are installed on back iron 21 of the motor rotor structure in a staggered arrangement; the N pole permanent magnet and the S pole permanent magnet are square, and the vertical surface of one side of the convex surface of the permanent magnet 12 does not exceed the edge of the back iron 21; as shown in fig. 4, the width of the back iron 21 of the linear motor is slightly wider than the width of the stator core 23, and the width of the permanent magnet 22 is smaller than the width of the back iron 21; one side vertical surface of the N-pole permanent magnet 222 exceeds one side vertical surface of the stator core 23, while the other side vertical surface of the N-pole permanent magnet 222 does not exceed the other side vertical surface of the stator core 23. One side vertical surface of the S-pole permanent magnet 221 exceeds the other side vertical surface of the stator core 23, and the other side vertical surface of the S-pole permanent magnet 121 does not exceed the one side vertical surface of the stator core 23; as shown in fig. 5, notches are provided on both sides of the stator core teeth, the cross section of the stator teeth in the width direction is inverted convex, and the magnetic pull force of the unit permanent magnet groups on both sides is enlarged as shown in fig. 7, compared with the structure without notches of fig. 5.
The above embodiments are only for illustrating the technical idea of the present invention, and are not intended to limit the scope of the present invention, and any modification, equivalent replacement, improvement, etc. made on the basis of the technical scheme of the present invention according to the technical idea of the present invention should be included in the scope of the present invention.
Claims (3)
1. The utility model provides a permanent magnet linear motor's side direction atress is from reset structure which characterized in that: the N pole and the S pole of the permanent magnet are arranged on the back iron of the rotor of the linear motor in a staggered manner, and magnetic pulling force is generated in the lateral direction of the rotor in a staggered convex arrangement manner of the N pole permanent magnet and the S pole permanent magnet on two sides of the stator core;
one side vertical surface of the N-pole permanent magnet exceeds one side vertical surface of the stator core, and the other side vertical surface of the N-pole permanent magnet does not exceed the other side vertical surface of the stator core; the vertical surface of one side of the S-pole permanent magnet exceeds the vertical surface of the other side of the stator core, namely the side which is not exceeded by the N-pole permanent magnet, and the vertical surface of the other side of the S-pole permanent magnet does not exceed the vertical surface of one side of the stator core, namely the side which is exceeded by the N-pole permanent magnet;
the two sides of the stator iron core tooth part are provided with notches, the cross section of the stator tooth in the width direction is in an inverted convex shape, the size of each notch is related to the magnetic pulling force, the vertical depth of each notch is from 0mm, and the magnetic pulling force on the two sides can be amplified due to the reasonable size of each notch;
the width of the permanent magnet is from the vertical surface at one end of the back iron to the notch at the other side of the tooth part of the stator core, and exceeds the notch bottom but does not exceed the vertical surface at the other end of the stator core;
the bottom surface of the notch of the stator tooth is provided with a certain inclination angle, and the magnetic pulling force on two sides can be amplified by the reasonable inclination angle.
2. The self-resetting structure of a permanent magnet linear motor according to claim 1, wherein: the back iron width of the linear motor is slightly wider than the width of the stator core, and the widths of the N-pole permanent magnet and the S-pole permanent magnet are smaller than the back iron width.
3. The self-resetting structure of a permanent magnet linear motor according to claim 1, wherein: the N pole permanent magnet and the S pole permanent magnet are square, and the edges of the permanent magnets do not exceed the edges of the back iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210152083.0A CN114530962B (en) | 2022-02-18 | 2022-02-18 | Lateral stress self-resetting structure of permanent magnet linear motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210152083.0A CN114530962B (en) | 2022-02-18 | 2022-02-18 | Lateral stress self-resetting structure of permanent magnet linear motor |
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| Publication Number | Publication Date |
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| CN114530962A CN114530962A (en) | 2022-05-24 |
| CN114530962B true CN114530962B (en) | 2023-09-08 |
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| CN202210152083.0A Active CN114530962B (en) | 2022-02-18 | 2022-02-18 | Lateral stress self-resetting structure of permanent magnet linear motor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000209839A (en) * | 1999-01-13 | 2000-07-28 | Yaskawa Electric Corp | Moving-winding type linear motor |
| JP2003134792A (en) * | 2001-10-22 | 2003-05-09 | Yaskawa Electric Corp | Permanent magnet linear motor |
| CN201307792Y (en) * | 2009-03-18 | 2009-09-09 | 常州富兴机电有限公司 | Multi-section misplaced magnetic-shoe rotor |
| CN109039003A (en) * | 2018-07-16 | 2018-12-18 | 深圳市歌尔泰克科技有限公司 | A kind of linear motor |
-
2022
- 2022-02-18 CN CN202210152083.0A patent/CN114530962B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000209839A (en) * | 1999-01-13 | 2000-07-28 | Yaskawa Electric Corp | Moving-winding type linear motor |
| JP2003134792A (en) * | 2001-10-22 | 2003-05-09 | Yaskawa Electric Corp | Permanent magnet linear motor |
| CN201307792Y (en) * | 2009-03-18 | 2009-09-09 | 常州富兴机电有限公司 | Multi-section misplaced magnetic-shoe rotor |
| CN109039003A (en) * | 2018-07-16 | 2018-12-18 | 深圳市歌尔泰克科技有限公司 | A kind of linear motor |
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| Publication number | Publication date |
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| CN114530962A (en) | 2022-05-24 |
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