CN109194085B - Large-stroke permanent magnet torquer - Google Patents
Large-stroke permanent magnet torquer Download PDFInfo
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- CN109194085B CN109194085B CN201811181508.0A CN201811181508A CN109194085B CN 109194085 B CN109194085 B CN 109194085B CN 201811181508 A CN201811181508 A CN 201811181508A CN 109194085 B CN109194085 B CN 109194085B
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- permanent magnet
- magnet steel
- shaped permanent
- fan
- ring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
Abstract
The invention discloses a large-stroke permanent magnetic torquer, and belongs to the technical field of electromagnetic elements. The invention comprises a magnetic steel base, an outer pressure ring, outer fan-shaped permanent magnet steel, inner fan-shaped permanent magnet steel, an inner pressure ring, a central support column, a coil framework and a coil; the inner fan-shaped permanent magnet steel and the outer fan-shaped permanent magnet steel respectively form an annular shape, are coaxial with the annular structure magnetic steel base and are embedded into two sides of the annular boss on the magnetic steel base; the inner part of the inner fan-shaped permanent magnet steel is supported by a central support column, and the upper part of the inner fan-shaped permanent magnet steel is fixed by an inner compression ring; the outer part of the outer fan ring-shaped permanent magnet steel is fixed by an outer pressure ring; the coil is wound on the coil framework to form a coil structure which is suspended on the central supporting column and embedded in the air gap. The invention adopts the design of the combined fan ring magnet, has long air gap effective area and good magnetic induction intensity distribution linearity, greatly increases the effective stroke of the magnetic torquer, reduces the power consumption of the magnetic torquer and reduces the temperature drift of the air gap working area.
Description
Technical Field
The invention belongs to the technical field of electromagnetic elements, and relates to a low-power-consumption large-stroke permanent magnet torquer. This torquer uses permanent magnet steel as the magnetic field source of excitation, and the atress moves in the magnetic field after the coil circular telegram, and the characteristics of this structure are: by adopting the combined fan ring-shaped magnet structure, the magnetic circuit structure can generate strong and uniform magnetic induction intensity distribution in a longer area, and the effective stroke of the magnetic torquer is greatly increased. .
Background
In some high precision inertial instruments, such as flexible accelerometers, a torquer is required as a feedback actuator for the system. The existing magnetic torquer is usually of a single permanent magnet structure, the effective stroke is short, the linearity of magnetic induction intensity distribution is poor, and a closed-loop control system is complex and has large steady-state error. Therefore, it is necessary to design a new permanent magnetic torquer, which increases the effective stroke of the magnetic torquer and improves the uniformity of the air gap magnetic induction intensity distribution.
Disclosure of Invention
The invention aims to: a large-stroke permanent magnetic torquer is designed, and the problems of short effective stroke and poor air gap magnetic induction intensity distribution linearity of the existing magnetic torquer are solved.
The specific scheme of the invention is as follows:
a long-stroke permanent magnet torquer comprises a magnetic steel base (1), an outer pressure ring (2), outer fan-shaped permanent magnet steel (3), inner fan-shaped permanent magnet steel (4), an inner pressure ring (5), a central support column (6), a coil framework (7) and a coil (8);
n1the inner sector annular permanent magnet steel (4) is annular and coaxial with the annular structure magnetic steel base (1), the inner part of the inner sector annular permanent magnet steel is supported by a central support column (6), the upper part of the inner sector annular permanent magnet steel is fixed by an inner pressure ring (5), and the lower part of the inner sector annular permanent magnet steel is embedded into a boss on the magnetic steel base (1), wherein the bottoms of the inner sector annular permanent magnet steel (4) and the central support column (6) are flush, and the tops of the sector annular permanent magnet steel (4), the inner pressure ring (5) and the central support column (6); n is2The outer sector annular permanent magnet steel (3) forms an annular shape, the annular structure magnetic steel base (1) is coaxial, the outside is fixed by the outer pressure ring (2), the lower part is embedded into the outer part of the boss on the magnetic steel base (1), and the top and the bottom of the outer sector annular permanent magnet steel (3) and the outer pressure ring (2) are flush.
The included angle of each sector ring in the outer sector ring-shaped permanent magnet steel (3) is 360/n2Degree, n2Is an integer from 4 to 16; the included angle of each sector ring in the inner sector ring-shaped permanent magnet steel (4) is 360/n1Degree, n1Is an integer from 4 to 16.
The coil (8) is wound on the coil framework (7) to form a coil structure, the coil structure is coaxial with the central support column (6) and is suspended on the central support column (6), and the hollow cylinder structure part of the wound coil (8) is embedded into an air gap between the outer fan-shaped permanent magnet steel (3) and the inner fan-shaped permanent magnet steel (4);
the outer fan-shaped permanent magnet steel (3) and the inner fan-shaped permanent magnet steel (4) are permanent magnet materials with low temperature coefficient within the temperature range of 25-85 ℃; the residual magnetic induction intensity directions of the outer fan-shaped permanent magnet steel (3) and the inner fan-shaped permanent magnet steel (4) are the same along the radial direction, if the outer side of the outer fan-shaped permanent magnet steel (3) is appointed to be an N pole, the outer side of the inner fan-shaped permanent magnet steel (4) is an N pole, and the inner sides of the outer fan-shaped permanent magnet steel (3) and the inner fan-shaped permanent magnet steel (4) are S poles;
the air gap distance between the outer fan-shaped permanent magnet steel (3) and the inner fan-shaped permanent magnet steel (4) is 0.6-1.2 mm;
the magnetic steel base (1), the outer ring (2) and the central support column (6) can be made into an integrated structure as required.
Compared with the prior art, the invention has the following advantages:
the large-stroke permanent magnetic torquer adopts a novel combined fan-shaped magnet design, on one hand, the air gap effective area is long, the magnetic induction intensity distribution linearity is good, the effective stroke of the magnetic torquer is greatly increased, and the requirements of a magnetic circuit section structure and a coil structure on the assembly precision are reduced; on one hand, the magnetic induction intensity of the air gap is high, the power consumption of the magnetic torquer is reduced, and the temperature drift of the air gap working area is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a large-stroke permanent magnetic torquer of the present invention;
FIG. 2 is a schematic diagram of a magnetic circuit structure of a large-stroke permanent magnetic torquer of the present invention;
FIG. 3 is a schematic diagram of a coil structure of a large-stroke permanent magnetic torquer according to the present invention;
FIG. 4 is a schematic diagram of a prior art torquer;
fig. 5 is a schematic diagram of radial magnetic induction effective travel on the axis of the air gap between the torquer provided by the present invention and the torquer shown in fig. 4.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Fig. 1 is a schematic structural diagram of a large-stroke permanent magnetic torquer provided by the present invention, wherein arrows indicate directions of residual magnetism of magnetic steel. The large-stroke permanent magnet torquer comprises a magnetic steel base 1, an outer pressure ring 2, an outer fan-shaped permanent magnet steel 3, an inner fan-shaped permanent magnet steel 4, an inner pressure ring 5, a central support column 6, a coil framework 7 and a coil 8.
As shown in fig. 2, the upper surface of the magnetic steel base 1 is provided with an annular boss, the height of the boss is generally 0.2-0.3 mm, the width of the boss is 0.6-1.2 mm, preferably 0.9mm, and the width corresponds to the width of an air gap; the annular boss plays a role in fixing the outer fan-shaped permanent magnet steel 3 and the inner fan-shaped permanent magnet steel 4. The inner fan-shaped permanent magnet steel 4 is samarium-cobalt magnet steel, the central angle is 45 degrees, the outer side of the inner fan-shaped permanent magnet steel 4 is an N pole, and the inner side is an S pole. The inner sides of the sector annular permanent magnet steels 4 in the 8 blocks are supported by a central support column 6, the lower parts of the sector annular permanent magnet steels are embedded into a boss on the magnetic steel base 1, the sector annular permanent magnet steels 4 are flush with the bottom of the central support column 6, and the top parts of the sector annular permanent magnet steels 4, the inner compression ring 5 and the central support column 6 are flush and fixed in an adhesive mode. The outer fan ring-shaped permanent magnet steel 3 is samarium-cobalt magnetic steel, the central angle is 45 degrees, the outer side of the outer fan ring-shaped permanent magnet steel 3 is an N pole, and the inner side is an S pole. 8 outer fan ring shape permanent magnet steel 3 constitute the annular, and is coaxial with annular structure's magnet steel base 1, and 8 outer fan ring shape permanent magnet steel 3's the outside is fixed by outer clamping ring 2, and the boss outside on the lower part embedding magnet steel base 1, wherein outer fan ring shape permanent magnet steel 3 and outer clamping ring 2's top bottom all flushes, fixes through sticky mode at last.
And the inner compression ring 5 is positioned in an annular groove processed above the inner fan-shaped permanent magnet steel 4.
The height of the outer fan-shaped permanent magnet steel 3 is not lower than that of the inner fan-shaped permanent magnet steel 4.
The coil 8 is an enameled wire with the length of 5 meters and the core diameter of 40 micrometers, and the enameled wire is uniformly and tightly wound on the coil framework 7 to form a coil structure, the number of turns of the coil is 150, and the coil framework is connected with a required driven structure. Referring to fig. 3, the bobbin 7 is a hollow cylinder, and has a top surface and a side wall, and a center hole is formed in the center of the top surface. The coil structure is coaxial with the central support column 6 and is suspended on the central support column 6, and the side wall of the hollow cylinder structure wound with the coil 8 is embedded in an air gap between the outer fan-shaped permanent magnet steel 3 and the inner fan-shaped permanent magnet steel 4. Applying a current to the coil 8 generates an electromagnetic force in the direction of the magnet axis on the driven structure.
Fig. 4 shows a torquer in the prior art, and compared with the double-fan ring-shaped magnetic steel design structure of the invention, the effective stroke of the air gap structure of the torquer provided by the invention is about 3mm, and is improved by more than 3 times compared with the traditional structure by about 1 mm.
Because the magnetic circuit structure can provide larger radial magnetic induction intensity for the coil, the driving power consumption is lower when the coil generates the same effective stroke, and the working power consumption is reduced by 40 percent compared with the traditional structure.
The above-mentioned embodiments are further described in detail for the purpose of illustrating the invention, the technical solutions and the advantages, it should be understood that the above-mentioned embodiments are only exemplary of the invention and are not intended to limit the invention, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the invention should be included in the protection scope of the invention.
Claims (3)
1. A long-stroke permanent magnet torquer comprises a magnetic steel base (1), an outer pressure ring (2), outer fan-shaped permanent magnet steel (3), inner fan-shaped permanent magnet steel (4), an inner pressure ring (5), a central support column (6), a coil framework (7) and a coil (8);
n1the inner sector ring-shaped permanent magnet steel (4) forms a ring shape, the inner sector ring-shaped permanent magnet steel (4) with a ring-shaped structure is coaxial with the magnetic steel base (1), the inner part of the inner sector ring-shaped permanent magnet steel (4) is supported by a central support column (6), and the upper part of the inner sector ring-shaped permanent magnet steel (4) is fixed by an inner compression ring (5);
n2the outer fan-shaped permanent magnet steel (3) of the block is annular, the outer fan-shaped permanent magnet steel (3) of the annular structure is coaxial with the magnetic steel base (1), and the outer part of the outer fan-shaped permanent magnet steel (3) is fixed by the outer pressure ring (2);
the coil (8) is wound on the coil framework (7) to form a coil structure, and the coil structure is coaxial with the central support column (6) and is suspended on the central support column (6);
the outer fan-shaped permanent magnet steel (3) and the inner fan-shaped permanent magnet steel (4) are permanent magnet materials with low temperature coefficient within the temperature range of 25-85 ℃;
the residual magnetic induction intensity directions of the outer fan-shaped permanent magnet steel (3) and the inner fan-shaped permanent magnet steel (4) are the same along the radial direction;
the method is characterized in that:
an annular boss is arranged on the upper surface of the magnetic steel base (1);
the lower part of the inner fan-shaped permanent magnet steel (4) is embedded into an annular boss on the magnetic steel base (1), the lower part of the fan-shaped permanent magnet steel (4) is flush with the bottom of the central support column (6), and the top parts of the fan-shaped permanent magnet steel (4), the inner compression ring (5) and the central support column (6) are flush;
the lower part of the outer fan-shaped permanent magnet steel (3) is embedded outside an annular boss on the magnetic steel base (1), and the lower part of the outer fan-shaped permanent magnet steel (3) and the bottom of the top of the outer pressure ring (2) are flush;
the height of the outer fan-shaped permanent magnet steel (3) is not lower than that of the inner fan-shaped permanent magnet steel (4);
the outer side of the outer fan-shaped permanent magnet steel (3) is an N pole, the outer side of the inner fan-shaped permanent magnet steel (4) is an N pole, and the inner sides of the outer fan-shaped permanent magnet steel (3) and the inner fan-shaped permanent magnet steel (4) are S poles;
the outer fan-shaped permanent magnet steel (3) and the inner fan-shaped permanent magnet steel (4) are samarium cobalt steel;
the coil framework (7) is of a hollow cylinder structure, and the side wall part of the hollow cylinder structure wound with the coil (8) is embedded into an air gap between the outer fan-shaped permanent magnet steel (3) and the inner fan-shaped permanent magnet steel (4); the air gap distance between the outer fan-shaped permanent magnet steel (3) and the inner fan-shaped permanent magnet steel (4) is 0.6 mm-1.2 mm.
2. A large-stroke permanent-magnet torquer according to claim 1, characterized in that: the included angle of each sector ring in the outer sector ring-shaped permanent magnet steel (3) is 360/n2Degree, n2Is an integer from 4 to 16; the included angle of each sector ring in the inner sector ring-shaped permanent magnet steel (4) is 360/n1Degree, n1Is an integer from 4 to 16.
3. A large-stroke permanent-magnet torquer according to claim 1, characterized in that: the magnetic steel base (1), the outer ring (2) and the central support column (6) are made into an integrated structure as required.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811181508.0A CN109194085B (en) | 2018-10-11 | 2018-10-11 | Large-stroke permanent magnet torquer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811181508.0A CN109194085B (en) | 2018-10-11 | 2018-10-11 | Large-stroke permanent magnet torquer |
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| Publication Number | Publication Date |
|---|---|
| CN109194085A CN109194085A (en) | 2019-01-11 |
| CN109194085B true CN109194085B (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811181508.0A Active CN109194085B (en) | 2018-10-11 | 2018-10-11 | Large-stroke permanent magnet torquer |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0370462A (en) * | 1989-08-04 | 1991-03-26 | Showa Electric Wire & Cable Co Ltd | Coil motor |
| JPH07123682A (en) * | 1993-10-22 | 1995-05-12 | Yuichi Moriki | Cylindrical linear actuator |
-
2018
- 2018-10-11 CN CN201811181508.0A patent/CN109194085B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0370462A (en) * | 1989-08-04 | 1991-03-26 | Showa Electric Wire & Cable Co Ltd | Coil motor |
| JPH07123682A (en) * | 1993-10-22 | 1995-05-12 | Yuichi Moriki | Cylindrical linear actuator |
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| Publication number | Publication date |
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| CN109194085A (en) | 2019-01-11 |
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