CN111130298A - Linear motor rotor and linear motor - Google Patents
Linear motor rotor and linear motor Download PDFInfo
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- CN111130298A CN111130298A CN201911411294.6A CN201911411294A CN111130298A CN 111130298 A CN111130298 A CN 111130298A CN 201911411294 A CN201911411294 A CN 201911411294A CN 111130298 A CN111130298 A CN 111130298A
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- linear motor
- mover
- teeth
- tooth
- auxiliary
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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
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
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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)
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Linear Motors (AREA)
Abstract
The application provides a linear motor active cell and a linear motor. This linear electric motor active cell includes mounting panel (1), active cell iron core and supplementary tooth (2), supplementary tooth (2) and active cell iron core all set up same one side in mounting panel (1), supplementary tooth (2) set up at least one side at the active cell iron core along the slip direction of linear electric motor active cell, supplementary tooth (2) and active cell iron core between have the interval of predetermineeing, the active cell iron core includes rotor tooth (3), the width of rotor tooth (3) on the slip direction of linear electric motor active cell is Ww, width of supplementary tooth (2) on the slip direction of linear electric motor active cell is Wa, W is Wa/Ww, wherein 0.36 is less than or equal to W and is less than or equal to 0.9. According to the linear motor rotor, the thrust of the linear motor can be kept or increased, and the fluctuation of the positioning force and the fluctuation of the thrust of the linear motor are reduced.
Description
Technical Field
The application relates to the technical field of linear motors, in particular to a linear motor rotor and a linear motor.
Background
In order to realize the linear motion required by the application, the traditional mode is 'rotating motor + ball screw', namely, the screw structure is utilized to convert the motion of the rotating direction of the rotating motor into the linear motion. With the progress of the related art, a linear servo motor (hereinafter, simply referred to as "linear motor") has been newly developed in recent years. In contrast, the linear motor has many advantages, because the linear motor has no lead screw, so the length is not limited by the length of the lead screw, the positioning precision and the repeated positioning precision of the linear motor are higher, and the maximum speed and the maximum acceleration are larger. The linear motor has the characteristics of high precision, high acceleration, high responsiveness and the like, and is widely applied to the industrial field, particularly the high-precision and high-speed machining.
The structure of the linear motor can be simply understood as that the rotary motor is cut along the radius and pulled into a straight line, the stator part becomes a stator, and the moving rotor part becomes a rotor, and the working principle of the linear motor is similar to that of the rotary motor. In a rotary servo motor, torque and torque fluctuation are very important technical indexes, and indirectly influence the position accuracy of the servo motor, which are mainly concerned performance indexes by servo motor customers. Similarly, the technical indexes of the linear servo motor are no-load positioning force, positioning force fluctuation, load thrust and thrust fluctuation, which correspondingly affect the positioning accuracy and repeated positioning accuracy of the linear motor, and the above items are also important requirements in the design of the linear motor. Therefore, maintaining or increasing the thrust force and reducing the positioning force fluctuation and the thrust force fluctuation are important issues in designing the linear motor.
Disclosure of Invention
Therefore, the technical problem to be solved by the application is to provide a linear motor rotor and a linear motor, which can keep or increase the thrust of the linear motor and reduce the positioning force fluctuation and the thrust fluctuation of the linear motor.
In order to solve the above problems, the present application provides a linear motor mover, including a mounting plate, a mover core and auxiliary teeth, the auxiliary teeth and the mover core are both disposed on the same side of the mounting plate, the auxiliary teeth are disposed on at least one side of the mover core along a sliding direction of the linear motor mover, a preset interval is provided between the auxiliary teeth and the mover core, the mover core includes mover teeth, a width of the mover teeth in the sliding direction of the linear motor mover is Ww, a width of the auxiliary teeth in the sliding direction of the linear motor mover is Wa, W is Wa/Ww, where W is 0.36 or more and is less than or equal to 0.9.
Preferably, in a cross section perpendicular to the lamination direction of the rotor core, the distance between the center line of the auxiliary tooth and the center line of the adjacent rotor tooth is La, the tooth distance of the adjacent rotor tooth is Lw, L is La/Lw, and L is more than or equal to 0.9 and less than or equal to 1.3.
Preferably, the height Ha of the tooth top of the auxiliary tooth from the mounting plate is smaller than the height Hw of the tooth top of the moving sub tooth from the mounting plate.
Preferably, H is Ha/Hw, where 0.75 ≦ H ≦ 0.95.
Preferably, the auxiliary teeth are disposed at one side of the mover core to form a single-sided auxiliary structure.
Preferably, the mover core further includes a mover yoke, the mover yoke is fixedly disposed on the mounting plate, and the mover teeth are fixedly disposed on the mover yoke; and/or the mounting plate is also provided with an auxiliary yoke, and the auxiliary teeth are arranged on the auxiliary yoke.
Preferably, the auxiliary teeth are made of a magnetic conductive material different from that of the mover core.
Preferably, a tooth groove is formed between adjacent rotor teeth, and the tooth groove is an inclined groove.
Preferably, a tooth socket is formed between adjacent rotor teeth, and the tooth socket is an open slot, a half-open slot or a closed slot.
According to another aspect of the present application, there is provided a linear motor including a linear motor mover, the linear motor mover being the above-described linear motor mover.
The application provides a linear electric motor active cell, the mounting panel, active cell iron core and supplementary tooth, supplementary tooth and active cell iron core all set up the same one side at the mounting panel, supplementary tooth sets up at least one side at the active cell iron core along linear electric motor active cell's slip direction, it predetermines the interval to have between supplementary tooth and the active cell iron core, the active cell iron core includes the active cell tooth, the width of active cell tooth on linear electric motor active cell's slip direction is Ww, the width of supplementary tooth on linear electric motor active cell's slip direction is Wa, W is Wa/Ww, wherein 0.36 is less than or equal to W and is less than or equal to 0.9. The width ratio range between the auxiliary teeth of the linear motor rotor and the rotor teeth is limited, the arrangement structure of the auxiliary teeth can be optimized, the auxiliary teeth can compensate the magnetic field at the end of the rotor core, the distortion of the magnetic field is reduced, the overall distribution of the magnetic field is improved, the difficulty of a linear motor driver fluctuation suppression control algorithm is reduced while the no-load positioning force fluctuation and the load thrust fluctuation of the linear motor are reduced, and the thrust of the linear motor is effectively maintained or increased.
Drawings
Fig. 1 is a schematic perspective view illustrating a rotor of a linear motor according to an embodiment of the present disclosure;
fig. 2 is a schematic side view of a linear motor mover according to an embodiment of the present application;
fig. 3 is a schematic structural view of a linear motor mover according to an embodiment of the present application;
fig. 4 is a schematic bottom view of a linear motor mover according to an embodiment of the present disclosure;
fig. 5 is a magnetic flux distribution diagram of a magnetic circuit of a linear motor according to an embodiment of the present application;
fig. 6 is a La finite element scanning simulation result of the linear motor according to the embodiment of the present application;
fig. 7 is a Wa finite element scanning simulation result of the linear motor according to the embodiment of the present application;
fig. 8 is a simulation result of Ha finite element scan of the linear motor according to the embodiment of the present application.
The reference numerals are represented as:
1. mounting a plate; 2. auxiliary teeth; 3. the rotor teeth; 4. a mover yoke; 5. a tooth socket.
Detailed Description
Referring to fig. 1 to 8 in combination, according to an embodiment of the present application, a linear motor mover includes a mounting plate 1, a mover core and auxiliary teeth 2, the auxiliary teeth 2 and the mover core are both disposed on the same side of the mounting plate 1, the auxiliary teeth 2 are disposed on at least one side of the mover core along a sliding direction of the linear motor mover, a preset interval is provided between the auxiliary teeth 2 and the mover core, the mover core includes mover teeth 3, a width of the mover teeth 3 in the sliding direction of the linear motor mover is Ww, a width of the auxiliary teeth 2 in the sliding direction of the linear motor mover is Wa, W is Wa/Ww, where W is greater than or equal to 0.36 and less than or equal to 0.9.
The width ratio range between the auxiliary teeth 2 and the rotor teeth 3 of the rotor of the linear motor is limited, the arrangement structure of the auxiliary teeth 2 can be optimized, the magnetic field at the end part of the rotor core can be compensated by the auxiliary teeth 2, the distortion of the magnetic field is reduced, the overall distribution of the magnetic field is improved, the fluctuation of the no-load positioning force and the load thrust of the linear motor are reduced, the difficulty of a linear motor driver fluctuation suppression control algorithm is reduced, and the thrust of the linear motor is effectively kept or increased.
The rotor teeth 3 and the auxiliary teeth 2 are the main channels of the magnetic circuit, because both are made of ferromagnetic material, the magnetic circuit channel made of the material has magnetic resistance far smaller than that of air and coil, so that most of the magnetic force lines flow to the air gap through the end of the rotor teeth 3 and the end of the auxiliary teeth 2 except for a small part of the magnetic leakage. Therefore, the rotor teeth 3 and the auxiliary teeth 2 are critical to the distribution of the magnetic lines of the air-gap magnetic field. W is more than or equal to 0.36 and less than or equal to 0.9, and the distribution of magnetic lines of force in an air gap magnetic field can best meet the requirement of balancing the magnetic lines of force of the end part, so that the magnetic circuit of the end part is optimized, and further the fluctuation of the end part force, the positioning force and the thrust force is optimized.
Linear motors are distinguished from rotating machines by three-phase asymmetries caused by end breaks. The design of the rotating motor is that three phases are symmetrically balanced in space angle and electrical angle. The linear motor has no three-symmetry condition in space, and the fluctuation of the output force caused by the three-symmetry condition is called end force. In the linear motor, a cogging force similar to that of the rotary motor is also included. The sum of the end force and the tooth space force is the positioning force of the linear motor.
The auxiliary teeth 2 are not wrapped with coils.
In a section perpendicular to the lamination direction of the rotor core, the distance between the center line of the auxiliary tooth 2 and the center line of the adjacent rotor tooth 3 is La, the tooth distance of the adjacent rotor tooth 3 is Lw, L is La/Lw, and L is more than or equal to 0.9 and less than or equal to 1.3.
In this application, associate the relevant parameter design of auxiliary tooth 2 with the tooth spacing of active cell tooth 3, thereby make auxiliary tooth 2's design factor concentrate on motor active cell end, consequently when carrying out auxiliary tooth 2's design or add man-hour, only need confirm the structure of motor active cell itself and just can accomplish auxiliary tooth 2's design, the design structure is simpler, and make the contact between auxiliary tooth 2's design and the stator less, make the design of stator receive auxiliary tooth 2's influence less, can make the design of stator more nimble convenient.
By limiting the proportional relation between La and Lw, the constraint that L is more than or equal to 0.9 and less than or equal to 1.3 is met, so that the distribution of magnetic lines of force in an air gap magnetic field at the end part of the rotor core can best meet the requirement of balancing the magnetic lines of force of the end part, the positioning force fluctuation and the thrust fluctuation can be effectively weakened, the performance of the linear motor is improved, the magnetic circuit of the end part is optimized, and the end part force, the positioning force and the thrust fluctuation are further optimized.
The height Ha between the tooth tops of the auxiliary teeth 2 and the mounting plate 1 is smaller than the height Hw between the tooth tops of the movable sub-teeth 3 and the mounting plate 1.
Preferably, H is Ha/Hw, where 0.75 ≦ H ≦ 0.95.
By limiting the proportional relation between Ha and Hw, the constraint that H is more than or equal to 0.75 and less than or equal to 0.95 is met, so that the distribution of magnetic lines of force in an air-gap magnetic field can best meet the requirement of balancing the magnetic lines of force of the end part, the positioning force fluctuation and the thrust fluctuation can be effectively weakened, the performance of the linear motor is improved, the magnetic circuit of the end part is optimized, and the end part force, the positioning force and the thrust fluctuation are further optimized.
In the present embodiment, the auxiliary teeth 2 are disposed at one side of the mover core to form a single-sided auxiliary structure.
The rotor iron core further comprises a rotor yoke 4, the rotor yoke 4 is fixedly arranged on the mounting plate 1, and the rotor teeth 3 are fixedly arranged on the rotor yoke 4.
The mounting plate 1 is also provided with an auxiliary yoke, and the auxiliary teeth 2 are arranged on the auxiliary yoke. The auxiliary tooth 2 can be fixed directly to the mounting plate 1 by eliminating the auxiliary yoke.
The auxiliary teeth 2 may be made of a magnetic conductive material different from that of the mover core. Because supplementary tooth 2 is difficult for independent die sinking processing, consequently need adopt the magnetic materials who easily processes alone relatively, and the active cell iron core adopts the lamination formula structure, consequently can adopt silicon steel sheet towards the piece to can design supplementary tooth 2 in a flexible way, select more suitable magnetic materials according to the processing of supplementary tooth 2, reduce the processing degree of difficulty and the processing cost of supplementary tooth 2.
In this embodiment, the auxiliary teeth 2 are generally made of 45# steel.
In the electromagnetic field theory, the stress condition of the subdivision unit in the field can be solved according to Maxwell formula by the field idea, namely electromagnetic field finite element simulation. As shown in fig. 6, 7 and 8, taking a typical structure as an example, the adjacent pitch Lw of the core module in the model is 21.33mm, the core tooth width Ww is 11mm, and the core tooth height Hw is 45 mm. And (3) performing simulation analysis on the key size of the model auxiliary tooth, namely obtaining the relation between the auxiliary tooth and the three previous parameters, namely the distance La from the center line of the auxiliary tooth to the center line of the edge tooth of the rotor core, the width Wa of the auxiliary tooth and the height Ha of the auxiliary single auxiliary tooth. Most preferred values are 21.165mm for La, 7mm for Wa and 40mm for Ha, where La/Lw is 0.992, Wa/Ww is 0.636 and Ha/Hw is 0.889. It can be seen that the relationships between the optimal auxiliary tooth design parameters obtained through simulation and the parameters of the mover core are within the above-defined ranges of the present application.
According to an embodiment of the present application, the linear motor includes a linear motor mover, which is the above-described linear motor mover.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (10)
1. The linear motor rotor is characterized by comprising a mounting plate (1), a rotor core and auxiliary teeth (2), wherein the auxiliary teeth (2) and the rotor core are arranged on the same side of the mounting plate (1), the auxiliary teeth (2) are arranged on at least one side of the rotor core along the sliding direction of the linear motor rotor, preset intervals are formed between the auxiliary teeth (2) and the rotor core, the rotor core comprises rotor teeth (3), the width of the rotor teeth (3) in the sliding direction of the linear motor rotor is Ww, the width of the auxiliary teeth (2) in the sliding direction of the linear motor rotor is Wa, W is Wa/Ww, and W is not less than 0.36 and not more than 0.9.
2. The linear motor mover according to claim 1, wherein, in a cross-section perpendicular to the lamination direction of the mover core, a distance between a center line of the auxiliary teeth (2) and a center line of the adjacent moving sub-teeth (3) is La, and a tooth pitch of the adjacent moving sub-teeth (3) is Lw, where L is 0.9 ≦ L ≦ 1.3.
3. The linear motor mover according to claim 1, wherein a height Ha of the addendum of the auxiliary tooth (2) from the mounting plate (1) is smaller than a height Hw of the addendum of the mover tooth (3) from the mounting plate (1).
4. The linear motor mover of claim 3, wherein H ═ Ha/Hw, where 0.75 ≦ H ≦ 0.95.
5. The linear motor mover according to claim 1, wherein the auxiliary teeth (2) are arranged at one side of the mover core, forming a single-sided auxiliary structure.
6. The linear motor mover according to claim 1, wherein the mover core further comprises a mover yoke (4), the mover yoke (4) being fixedly arranged on the mounting plate (1), the mover teeth (3) being fixedly arranged on the mover yoke (4); and/or an auxiliary yoke is further arranged on the mounting plate (1), and the auxiliary teeth (2) are arranged on the auxiliary yoke.
7. The linear motor mover according to claim 1, wherein the auxiliary teeth (2) are made of a different magnetically conductive material than the mover core.
8. The linear motor mover according to claim 1, characterized in that a tooth slot (5) is formed between adjacent mover teeth (3), said tooth slot (5) being a skewed slot.
9. The linear motor mover according to claim 1, wherein a tooth slot (5) is formed between adjacent mover teeth (3), and the tooth slot (5) is an open slot, a semi-open slot or a closed slot.
10. A linear motor comprising a linear motor mover, characterized in that said linear motor mover is a linear motor mover according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911411294.6A CN111130298A (en) | 2019-12-31 | 2019-12-31 | Linear motor rotor and linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911411294.6A CN111130298A (en) | 2019-12-31 | 2019-12-31 | Linear motor rotor and linear motor |
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| Publication Number | Publication Date |
|---|---|
| CN111130298A true CN111130298A (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911411294.6A Pending CN111130298A (en) | 2019-12-31 | 2019-12-31 | Linear motor rotor and linear motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022047864A1 (en) * | 2020-09-04 | 2022-03-10 | 瑞声声学科技(深圳)有限公司 | Linear motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4129591B2 (en) * | 2001-10-19 | 2008-08-06 | 株式会社安川電機 | Permanent magnet synchronous linear motor |
| CN202034884U (en) * | 2011-01-07 | 2011-11-09 | 青岛同日电机有限公司 | Permanent magnet linear synchronous motor |
| CN102299607A (en) * | 2011-08-25 | 2011-12-28 | 哈尔滨工业大学 | Transverse magnetic flux linear reluctance motor with offset permanent magnet |
| CN202906717U (en) * | 2012-10-10 | 2013-04-24 | 中国科学院宁波材料技术与工程研究所 | Permanent magnetic synchronous linear motor reducing magnetic resistance |
-
2019
- 2019-12-31 CN CN201911411294.6A patent/CN111130298A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4129591B2 (en) * | 2001-10-19 | 2008-08-06 | 株式会社安川電機 | Permanent magnet synchronous linear motor |
| CN202034884U (en) * | 2011-01-07 | 2011-11-09 | 青岛同日电机有限公司 | Permanent magnet linear synchronous motor |
| CN102299607A (en) * | 2011-08-25 | 2011-12-28 | 哈尔滨工业大学 | Transverse magnetic flux linear reluctance motor with offset permanent magnet |
| CN202906717U (en) * | 2012-10-10 | 2013-04-24 | 中国科学院宁波材料技术与工程研究所 | Permanent magnetic synchronous linear motor reducing magnetic resistance |
Non-Patent Citations (2)
| Title |
|---|
| YUSHENG HU等: ""Reducing the Detent Force of Permanent Magnet"", 《IEEE》 * |
| 黄立人: ""垂直运输***永磁直线同步电机优化设计"", 《中国优秀硕士学位论文全文数据库 工程Ⅱ辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022047864A1 (en) * | 2020-09-04 | 2022-03-10 | 瑞声声学科技(深圳)有限公司 | Linear motor |
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Application publication date: 20200508 |