CN110581634A - Spiral permanent magnet electromagnetic actuator - Google Patents
Spiral permanent magnet electromagnetic actuator Download PDFInfo
- Publication number
- CN110581634A CN110581634A CN201911002976.1A CN201911002976A CN110581634A CN 110581634 A CN110581634 A CN 110581634A CN 201911002976 A CN201911002976 A CN 201911002976A CN 110581634 A CN110581634 A CN 110581634A
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- CN
- China
- Prior art keywords
- permanent magnet
- spiral
- rotor
- core
- stator
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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
-
- 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
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
-
- 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
- H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
- H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
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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)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
The invention discloses a spiral permanent magnet electromagnetic actuator, which comprises a stator ring and a rotor ring positioned in the stator ring, wherein the stator ring comprises a stator core and a winding wound on the inner side of the stator core, the rotor ring comprises a rotor core and a spiral or approximately spiral permanent magnet connected to the outer circle of the rotor core and formed by winding the outer circle, and the permanent magnet generates axial force and drives the rotor core to axially and linearly move after the winding is electrified. The overall structure of the permanent magnet arranged on the rotor iron core is close to an ideal spiral structure, the thrust density is high, the stress is uniform, and the axial control precision of the actuator is high; the actuator cancels a middle transmission mechanism, has a simpler and more compact structure, adopts a direct driving mode to directly generate electromagnetic force to meet the requirement of main power, and has fast response and high control precision.
Description
Technical Field
The invention relates to the technical field of electromagnetic actuators, in particular to a spiral permanent magnet electromagnetic actuator.
background
At present, most of electromagnetic suspension researches are based on a traditional driving mode, an actuator adopts a rotary motor and ball screw type structure, rotary motion is converted into linear motion, the structure is very complex, electromagnetic force is indirectly obtained through a direct current brushless motor and a ball screw, so that the defects of long transmission chain, low transmission efficiency and slow response are caused, and in addition, because the rotary motion is converted into the linear motion, a pitch error exists, the rigidity is high, the positioning is not accurate at a high speed, and the control precision is low; and the gear engagement is easy to loosen, so that the increase of system errors and the reduction of stability are caused.
Therefore, in order to solve the above problems, a helical permanent magnet electromagnetic actuator is needed, which has a simpler and more compact structure by eliminating an intermediate transmission mechanism, directly generates electromagnetic force by adopting a direct driving mode to meet the requirement of main power, and has the advantages of quick response and high control precision;
Disclosure of Invention
In view of the above, the invention provides a helical permanent magnet electromagnetic actuator, which cancels an intermediate transmission mechanism, has a simpler and more compact structure, directly generates electromagnetic force to meet the requirement of main power by adopting a direct driving mode, and has the advantages of fast response and high control precision;
The invention discloses a spiral permanent magnet electromagnetic actuator, which comprises a stator ring and an rotor ring positioned in the stator ring, wherein the stator ring comprises a stator iron core and a winding wound on the inner side of the stator iron core, the rotor ring comprises a rotor iron core and a spiral or approximately spiral permanent magnet connected to the outer circle of the rotor iron core and formed by surrounding the outer circle, and the permanent magnet generates axial force and drives the rotor iron core to axially and linearly move after the winding is electrified.
Further, the permanent magnet comprises a spiral permanent magnet I and a spiral permanent magnet II which are adjacent in the axial direction and have the same rotating direction, and the spiral permanent magnet I and the spiral permanent magnet II are magnetized in the radial direction and have opposite magnetic directions.
Furthermore, the radial section of the rotor core is of a regular polygon structure, and the spiral permanent magnet I and the spiral permanent magnet II are composed of a plurality of magnetic blocks which are externally connected to each side of the rotor core and are circumferentially connected end to end.
further, iron poles are isolated between the spiral permanent magnet I and the spiral permanent magnet II in the axial direction.
Furthermore, the magnetic blocks are of a fan-shaped structure, the inner sides of the magnetic blocks are externally connected with the rotor iron core, and the outer circles of the magnetic blocks are located on the same cylindrical surface.
Further, the stator core inner cavity is of a cylindrical structure.
Further, the radial section of the rotor core is regular octagon.
further, the permanent magnet is made of neodymium iron boron; the stator iron core and the rotor iron core are formed by axially laminating silicon steel sheets.
furthermore, a non-magnetic shell is sleeved outside the stator core.
The invention has the beneficial effects that:
The overall structure of the permanent magnet arranged on the rotor iron core is close to an ideal spiral structure, the thrust density is high, the stress is uniform, and the axial control precision of the actuator is high; the actuator cancels a middle transmission mechanism, has a simpler and more compact structure, adopts a direct driving mode to directly generate electromagnetic force to meet the requirement of main power, has quick response, high control precision, low system error and good stability, and the permanent magnets are spliced into a spiral structure through the magnetic blocks and matched with the regular polygon structure of the rotor iron core, so that the manufacturing and the installation of the spiral permanent magnets are easy, and the assembly process is simplified; adjacent magnetic blocks are isolated through iron poles, so that the thrust fluctuation caused by the end effect of the magnetic blocks is weakened.
Drawings
the invention is further described below with reference to the figures and examples.
FIG. 1 is a schematic view of the assembly structure of the present invention;
FIG. 2 is a schematic view of a mover ring structure;
FIG. 3 is an axial cross-sectional structural schematic view of the present invention;
Detailed Description
FIG. 1 is a schematic view of the assembly structure of the present invention; FIG. 2 is a schematic view of a mover ring structure; FIG. 3 is an axial cross-sectional structural schematic view of the present invention;
As shown in the figures, the electromagnetic actuator of the helical permanent magnet in the embodiment includes a stator ring and an rotor ring located in the stator ring, the stator ring includes a stator core 1 and a winding 2 wound on the inner side of the stator core, the rotor ring includes a rotor core 3 and a helical or approximately helical permanent magnet connected to and formed around the outer circle of the rotor core, and after the winding is powered on, the permanent magnet generates an axial force and drives the rotor core to axially and linearly move; the length of the rotor ring is smaller than that of the stator ring in the axial direction, the stator core and the rotor core are coaxially arranged, the permanent magnet is spiral or approximately spiral, namely the permanent magnet can be in a standard spiral structure, and certain errors can be allowed to exist based on the standard spiral, namely the integral shape of the permanent magnet is a structure which gradually spirally rises around the excircle of the rotor core, the rotor core can be in a continuous spiral structure, or can be in an approximately spiral structure formed by fixing a plurality of permanent magnet blocks to the excircle of the rotor core in an end-to-end connection manner, and the integral structure of the permanent magnet is approximately spiral due to the mutual assembly structural errors of the permanent magnet blocks; the spiral permanent magnet is beneficial to improving the thrust density;
In the embodiment, the permanent magnets comprise a spiral permanent magnet I4 and a spiral permanent magnet II 5 which are adjacent in the axial direction and have the same rotating direction, and the spiral permanent magnet I4 and the spiral permanent magnet II 5 are magnetized in the radial direction and have opposite magnetic directions; referring to fig. 1, the axial adjacency and same rotation direction mean that the rotation directions of the spiral lines formed by the two groups of spiral permanent magnets are the same, and any two adjacent intersection points of a certain axial direction and the two groups of spiral permanent magnets comprise an intersection point with the spiral permanent magnet i and an intersection point with the spiral permanent magnet ii; as shown by arrows in the combined figure 3, the magnetism of the axially adjacent permanent magnets is opposite in the radial direction;
In the embodiment, the radial section of the rotor core 3 is of a regular polygon structure, and the spiral permanent magnet I and the spiral permanent magnet II are composed of a plurality of magnetic blocks 6 which are externally connected with each side of the rotor core and are circumferentially connected end to end; as shown in fig. 1, the radial direction of the rotor core is the same as the radial direction of the inner circle of the rotor core, adjacent magnetic blocks at adjacent planes outside the rotor core are axially staggered, an approximate spiral structure is integrally formed, the spiral permanent magnet i and the spiral permanent magnet ii are divided into a plurality of magnetic blocks which are spliced into discrete permanent magnets, the structure is easy to manufacture and install the spiral permanent magnets, the rotor core is of a regular polygon structure, the magnetic blocks are easy to assemble, the number of specific regular polygon sides is determined according to actual working conditions, a mounting hole is formed in the middle of the rotor core and used for being matched with a rotating shaft, the rotating shaft is in transmission fit with a non-magnetic bearing inner ring, and a non-conductive outer ring is fixedly matched with;
In the embodiment, an iron pole 7 is isolated between the spiral permanent magnet I4 and the spiral permanent magnet II 5 in the axial direction; the iron pole is a common iron material, the iron pole is in a sheet structure and is isolated between the spiral permanent magnet I4 and the spiral permanent magnet II 5, the iron pole is in a matched magnetic block structure and also in a fan-shaped structure, an iron pole is isolated between every two axially adjacent magnetic blocks, the iron pole of the structure is matched with the magnetic block structure to facilitate the integral assembly of the actuator, the manufacturing cost is also reduced, and the iron pole weakens the thrust fluctuation caused by the end effect of the magnetic blocks;
in the embodiment, the magnetic blocks 6 are in a fan-shaped structure, the inner sides of the magnetic blocks are externally connected with the rotor iron core, and the outer circles of the magnetic blocks are positioned on the same cylindrical surface; in order to facilitate the installation of the magnetic blocks, the inner sides of the magnetic blocks are of a planar structure, and the inner sides of the magnetic blocks are connected to the outer plane where one side of the rotor iron core is located, or the magnetic blocks can be of a standard fan-shaped structure and embedded in the rotor iron core; the fan-shaped structure is easy to assemble, and the excircle of each magnetic block forms a cylindrical structure, so that the bearing force is uniform, and the axial movement precision is high;
In this embodiment, the inner cavity of the stator core is of a cylindrical structure; the inner cavity is a cavity formed by surrounding the innermost side face of the stator core, the interference of an E-shaped winding structure to the inner cavity is ignored, the cylindrical structure is convenient to match with the piston rod, coils are easy to arrange, the coils are convenient to circumferentially and uniformly distribute, and the stress uniformity of the spiral permanent magnet is improved.
In this embodiment, the radial cross section of the rotor core is regular octagon; the octagonal structure gives consideration to the number of the magnetic blocks and the spiral structure of the permanent magnet, and the magnetic blocks are fewer in number on the premise of ensuring the thrust density, so that the actuator is convenient to assemble.
in this embodiment, the permanent magnet is made of neodymium iron boron; the stator core and the rotor core are axially laminated by silicon steel sheets; as shown in fig. 1, the inner circle of the stator core is in an E-shaped winding structure connected end to end in the axial direction, so that a plurality of axially arranged annular convex blocks for windings are formed on the inner circle of the stator core, the annular convex blocks are disconnected at intervals in the circumferential direction to form a plurality of discontinuous and centrosymmetric independent winding convex blocks, and the windings are wound on the independent winding convex blocks, wherein the armature winding adopts a single-layer concentrated winding, is easy to install and has good protection effect; the permanent magnet made of the material has large magnetic energy product and excellent magnetic property, and the stator core and the rotor core which are axially laminated effectively inhibit loss;
in the embodiment, a non-magnetic shell 8 is sleeved outside a stator core 1; the magnetic shield is formed by the casing to prevent magnetic leakage.
finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (9)
1. A helical permanent magnet electromagnetic actuator, characterized by: including stator ring, be located stator intra-annular rotor ring, stator ring includes stator core and winds in the inboard winding of stator core, rotor ring includes rotor core and connects in rotor core excircle and around the spiral or approximate spiral permanent magnet of excircle formation, make the permanent magnet produce axial force and drive rotor core axial linear motion after the winding circular telegram.
2. The helical permanent magnet electromagnetic actuator of claim 1, wherein: the permanent magnet comprises a spiral permanent magnet I and a spiral permanent magnet II which are adjacent in the axial direction and have the same rotating direction, and the spiral permanent magnet I and the spiral permanent magnet II are magnetized in the radial direction and have opposite magnetic directions.
3. the helical permanent magnet electromagnetic actuator of claim 2, wherein: the rotor core is characterized in that the radial section of the rotor core is of a regular polygon structure, and the spiral permanent magnet I and the spiral permanent magnet II are composed of a plurality of magnetic blocks which are externally connected to each side of the rotor core and are circumferentially connected end to end.
4. The helical permanent magnet electromagnetic actuator of claim 2, wherein: and iron poles are isolated between the spiral permanent magnet I and the spiral permanent magnet II in the axial direction.
5. The helical permanent magnet electromagnetic actuator of claim 3, wherein: the magnetic blocks are of a fan-shaped structure, the inner sides of the magnetic blocks are externally connected with the rotor iron core, and the outer circles of the magnetic blocks are located on the same cylindrical surface.
6. the helical permanent magnet electromagnetic actuator of claim 3, wherein: the inner cavity of the stator core is of a cylindrical structure.
7. The helical permanent magnet electromagnetic actuator of claim 3, wherein: the radial section of the rotor iron core is in a regular octagon shape.
8. The helical permanent magnet electromagnetic actuator of claim 1, wherein: the permanent magnet is made of neodymium iron boron; the stator iron core and the rotor iron core are formed by axially laminating silicon steel sheets.
9. the helical permanent magnet electromagnetic actuator of claim 1, wherein: the stator core is sleeved with a non-magnetic conductive shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911002976.1A CN110581634A (en) | 2019-10-21 | 2019-10-21 | Spiral permanent magnet electromagnetic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911002976.1A CN110581634A (en) | 2019-10-21 | 2019-10-21 | Spiral permanent magnet electromagnetic actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110581634A true CN110581634A (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911002976.1A Pending CN110581634A (en) | 2019-10-21 | 2019-10-21 | Spiral permanent magnet electromagnetic actuator |
Country Status (1)
| Country | Link |
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| CN (1) | CN110581634A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181259A (en) * | 2020-02-20 | 2020-05-19 | 安徽理工大学 | Linear rotation permanent magnet motor with E-shaped stator structure |
| CN111884371A (en) * | 2020-07-21 | 2020-11-03 | 江苏汇智高端工程机械创新中心有限公司 | Permanent magnet motor rotor and permanent magnet motor |
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| US20180183310A1 (en) * | 2015-07-23 | 2018-06-28 | Jonathan Z. Bird | Magnetically geared lead screw |
| CN207830501U (en) * | 2017-10-24 | 2018-09-07 | 河南理工大学 | A kind of permanent magnetism leading screw |
| CN110307115A (en) * | 2019-05-29 | 2019-10-08 | 南京金崎新能源动力研究院有限公司 | A kind of wave energy generating set based on magneto magnetic Screw |
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2019
- 2019-10-21 CN CN201911002976.1A patent/CN110581634A/en active Pending
Patent Citations (14)
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| CN101420164A (en) * | 2007-10-26 | 2009-04-29 | 佳能株式会社 | Motor and driving device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181259A (en) * | 2020-02-20 | 2020-05-19 | 安徽理工大学 | Linear rotation permanent magnet motor with E-shaped stator structure |
| CN111884371A (en) * | 2020-07-21 | 2020-11-03 | 江苏汇智高端工程机械创新中心有限公司 | Permanent magnet motor rotor and permanent magnet motor |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20191217 |