CN109166779A - A kind of relativistic magnetron permanent magnetic circuit system - Google Patents
A kind of relativistic magnetron permanent magnetic circuit system Download PDFInfo
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- CN109166779A CN109166779A CN201810952890.4A CN201810952890A CN109166779A CN 109166779 A CN109166779 A CN 109166779A CN 201810952890 A CN201810952890 A CN 201810952890A CN 109166779 A CN109166779 A CN 109166779A
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- permanent
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- magnetic circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
- H01J23/087—Magnetic focusing arrangements
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Abstract
The present invention relates to High-Power Microwave technical fields, and in particular to a kind of relativistic magnetron permanent magnetic circuit system.The magnetic circuit system includes anode canister (1), external magnetic circuit and internal magnetic circuit；The external magnetic circuit is located at anode canister (1) outside, the internal magnetic circuit is located in anode canister (1), the external magnetic circuit includes the yoke (3) of two permanent-magnetic ring of radial orientation (2) and the described two permanent-magnetic ring of radial orientation (2) of connection, and internal magnetic circuit includes two poly- magnetic pole pieces (4).The external magnetic circuit and inside magnetic path structure that the present invention designs can effectively reduce magnetic flux leakage, improve the uniformity of relativistic magnetron workspace axial magnetic field.The present invention can effectively mitigate the overall weight of magnetic circuit system.Permanent magnetic circuit system of the invention can be that relativistic magnetron provides operating fields with good uniformity with long-time stable, meet High-Power Microwave output when its work.
Description
Technical field
The present invention relates to High-Power Microwave technical fields, and in particular to a kind of relativistic magnetron permanent magnetic circuit system.
Background technique
The working principle of high-power microwave source device is micro- using electron beam and microwave cavity interaction generation high power
Wave output, the externally-applied magnetic field that is transmitted through of electron beam are constrained and are controlled.It is mainly used in high power microwave weapon, Gao Gong
The defence and militaries fields such as rate radar, impulse radar, super jammer.
Relativistic magnetron (RM) is one of current most effective high-power microwave source.Since its structure is simple, secured, work
Make the advantages such as reliability height, attracts wide attention.The emphasis studied at present first is that improve relativistic magnetron total physical efficiency
Amount efficiency, the volume and weight of reduction system is to meet the application requirement of miniaturization.
Relativistic magnetron externally-applied magnetic field common at present is usually to be provided by current excitation coil.Magnet exciting coil itself is huge
Matched power-supply system and cooling system, greatly increase the volume and weight of whole system when big volume and work, and
And need to consume a large amount of energy, reduce the total energy efficiency of high-power microwave source.
Compared with electrical excitation system, permanent magnet system possesses that small in size, light-weight, not consume the energy and stable magnetic field etc. excellent
Gesture, therefore Development Permanent Magnet system is to realize the active path of high-power microwave source miniaturization, energy efficient.In permanent magnet system
In, the reasonability of magnetic Circuit Design is of great significance to the output of stablizing of working area field.Therefore, in order to realize High-Power Microwave
The popularization and use in source, permanent magnet system magnetic Circuit Design also must be towards miniaturizations.For example, Chinese invention patent
No.201510419649.1 discloses ' a kind of permanent magnetism packaging relativistic magnetron ', and the structure of the magnetron includes several rings
The permanent magnet of shape, a part of permanent magnet cover on anode outer cylinder, and another part permanent magnet covers on the cathode in anode outer cylinder.So
And the magnetic line of force that permanent magnetic iron generates outside the magnetron is by air transmitted, this will cause more leakage field；It embeds forever
The toroidal design of magnetic magnet can not effectively gather magnetic field, this will generate more stray magnetic field.In order to reach workspace
Magnetic field strength requirement, it is necessary to increase the usage amount of permanent magnet, this is by the miniaturization of limiting device.
Summary of the invention
It is an object of the invention to aiming at the shortcomings in the prior art, provide a kind of improved permanent magnetic circuit system, can subtract
The overall weight and volume of small relativistic magnetron reduce whole energy consumption, to meet the needs of miniaturization.
The solution adopted by the present invention to solve the technical problem is that:
A kind of relativistic magnetron permanent magnetic circuit system, including anode canister 1, external magnetic circuit and internal magnetic circuit；It is described outer
Portion's magnetic circuit is located at outside anode canister 1, and internal magnetic circuit is located in anode canister 1, and the external magnetic circuit includes two permanent-magnetic ring of radial orientation 2
With the yoke 3 for connecting described two permanent-magnetic ring of radial orientation 2；Internal magnetic circuit includes two poly- magnetic pole pieces 4.
The direction of magnetization of described two permanent-magnetic ring of radial orientation 2 is opposite；The yoke 3 is set to two permanent-magnetic ring of radial orientation
Outside 2.
In the opposite permanent-magnetic ring of radial orientation 2 of two direction of magnetizations, a ring is radially the pole S in outer N, another ring edge
Radial direction is the pole N in outer S.
The permanent-magnetic ring of radial orientation 2 is bonded by muti-piece sintered permanent magnet respectively, the interior table of permanent-magnetic ring of radial orientation 2
Face connects with the outer surface of poly- magnetic pole piece 4.
The poly- magnetic pole piece 4 is set to inside anode canister 1；Cathode tube 5 is equipped between two poly- magnetic pole pieces 4.
The anode canister 1, permanent-magnetic ring of radial orientation 2 and yoke 3 are adhesively fixed by insulating cement.
Described two poly- magnetic pole pieces 4 are provided with through-hole, and the through-hole diameter of one of them poly- magnetic pole piece 4 is greater than cathode tube 5
Outer diameter.
The shape of poly- magnetic pole piece 4 is towards cathode tube 5 in gathering shape.
The material of the poly- magnetic pole piece 4 is the combination of soft magnetic materials or permanent-magnet material and soft magnetic materials, the permanent-magnet material
Part close region 6.
The material of the poly- magnetic pole piece 4 is electrical pure iron soft magnetic materials or Nd-Fe-B permanent magnet material and electrical pure iron soft magnetism
The combination of material.
The axial workspace length range of permanent magnetic circuit system is 40-150mm, and axial magnetic field homogeneity is better than in workspace
80%.
The beneficial effects of the present invention are:
The relativistic magnetron that the present invention designs permanent magnetic circuit system has external magnetic circuit and inside magnetic path structure, outside
Yoke design in portion's magnetic circuit, makes external magnetic force line have the channel for being easy to agglomerate, effectively reduces external stray magnetic field；It is interior
Gathering shape pole shoe design in portion's magnetic circuit, is gathered in internal magnetic field lines effectively in workspace, improves workspace axial magnetic
The uniformity of field.The relativistic magnetron that the present invention designs permanent magnetic circuit system can efficient benefit by optimizing magnetic Circuit Design
With the magnetic property of permanent magnet, the overall weight of permanent magnetic circuit system is reduced, and has working area field homogeneity range range big, magnetic field
Stable feature.It is with good uniformity that permanent magnetic circuit system of the invention can be that relativistic magnetron is provided with long-time stable
Operating fields meet High-Power Microwave output when its work.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of relativistic magnetron permanent magnetic circuit system of the invention；
Fig. 2 is that the permanent-magnetic ring of radial orientation direction of magnetization of relativistic magnetron permanent magnetic circuit system of the invention is illustrated
Figure；
Fig. 3 is the poly- magnetic pole piece structural schematic diagram of relativistic magnetron permanent magnetic circuit system of the invention.
Appended drawing reference
1 anode canister, 2 permanent-magnetic ring of radial orientation
The poly- magnetic pole piece of 3 yoke 4
5 cathode tube, 6 workspace
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figures 1 to 3, a kind of relativistic magnetron permanent magnetic circuit system, including external magnetic circuit and internal magnetic circuit.Institute
External magnetic circuit is stated to be located at outside anode canister 1；The internal magnetic circuit is located in anode canister 1.Wherein, external magnetic circuit includes two and radial takes
To permanent-magnetic clamp 2 and yoke 3；Internal magnetic circuit includes two poly- magnetic pole pieces 4.
2 sets of the permanent-magnetic ring of radial orientation on 1 outer wall of anode canister, permanent-magnetic ring of radial orientation 2 is coaxial with anode canister 1.
Two permanent-magnetic ring of radial orientation 2 are arranged separated by a distancely along the axial direction of anode canister 1.Two permanent-magnetic ring of radial orientation 2
The direction of magnetization on the contrary, magnetic pole is distributed as after one of magnetization, inside radially is the pole S, and outside is the pole N；Another magnetic
Magnetic pole is distributed as after change, and inside radially is the pole N, and outside is the pole S.
The inner surface of permanent-magnetic ring of radial orientation 2 connects with 1 outer surface of anode canister, the outer surface of permanent-magnetic ring of radial orientation 2 with
The inner surface of yoke connects.It is adhesively fixed between anode canister 1, permanent-magnetic ring of radial orientation 2 and yoke 3 by insulating cement.It is described poly-
Magnetic pole piece 4 is set to inside anode canister 1, and the outer surface of poly- magnetic pole piece 4 connects with the inner surface of permanent-magnetic ring of radial orientation 2.Two poly-
It is equipped with cathode tube 5 between magnetic pole piece 4, is equipped with workspace 6 in cathode tube 5.The poly- magnetic pole piece 4 is equipped with through-hole, one of them is poly-
The through-hole diameter of magnetic pole piece 4 is greater than the outer diameter of cathode tube 5.The shape of poly- magnetic pole piece 4 is towards workspace in gathering shape.
The formation basic theory in Anodic cylinder internal work magnetic field of the present invention is: external magnetic force line is by a permanent-magnetic ring of radial orientation
2 center is set out along radial direction, by yoke 4, is oriented to the center of another permanent-magnetic ring of radial orientation 2；The magnetic line of force again by
This permanent-magnetic ring of radial orientation 2 is conducted to the poly- magnetic pole piece 4 of corresponding one, and the magnetic line of force of this poly- magnetic pole piece 4 passes through air
It is conducted to another poly- magnetic pole piece 4；Finally the magnetic line of force in poly- magnetic pole piece 4 is conducted to first permanent-magnetic ring of radial orientation 2 again.In this way
Just the axial operating fields inside a perforation anode canister 1 are formd.
Embodiment 1
The sintered Nd-Fe-B permanent magnet that the trade mark is N50 in the market is selected to process tile shape magnet, the main magnetism of permanent magnet
Index are as follows: Br=14.0-14.6kGs, bHc >=11kOe, jHc >=12kOe, (BH) max=48-51MGOe.Tiles permanent magnet fills
Radial permanent magnetism annulus 2 is bonded to after magnetic, magnetizing direction is as shown in Fig. 2, the magnetizing direction of one of permanent-magnetic ring of radial orientation 2 is
The pole N in outer S, the magnetizing direction of another permanent-magnetic ring of radial orientation 2 are the pole S in outer N.The internal diameter of two permanent-magnetic ring of radial orientation 2
For 200mm, outer diameter 320mm, with a thickness of 70mm.The outer diameter of yoke 3 is 360mm, length 350mm.Poly- magnetic boots 4 select electrician
Pure iron material, shape are size are as follows: a=190mm, b=180mm, c1=85mm, c2=10mm, h=shown in Fig. 3 (a)
70mm, H=85mm.The workspace 6 of relativistic magnetron is 100mm along the axial length, radially the cylindric area of length 40mm
Within the scope of domain.
Permanent magnetic circuit system is installed according to shown in Fig. 1, and installation steps are: first by 2 sets of permanent-magnetic ring of radial orientation
On anode canister 1；Again by 3 sets of yoke on permanent-magnetic ring of radial orientation 2；Secondly poly- magnetic pole piece 4 is put into inside anode canister 1；Most
Cathode tube 5 is penetrated inside anode canister 1 by the circular hole of poly- magnetic pole piece 4 afterwards.In installation process, need to keep permanent-magnetic ring of radial orientation
2, yoke 3, anode canister 1, poly- magnetic pole piece 4 and cathode tube 5 are located on same axis.
After the assembly is completed, the axial magnetic field that the axially and radially different location of workspace 6 is carried out using gaussmeter is surveyed
Amount, on the basis of the central point of workspace φ 100x φ 40mm, takes a point to measure every 10mm both axially and radially, surveys
The axial magnetic field data obtained are shown in Table 1.
The axial Flow Field Numerical of 1 workspace different location of table
As can be seen from Table 1: the axial field range of workspace vertically is 248~257mT, uniformity 96.5%；
The axial field range of workspace radially is 246~248mT, uniformity 99.2%.
Embodiment 2
Make permanent-magnetic ring of radial orientation 2 and yoke 3 same as Example 1.Poly- magnetic pole piece 4 uses soft magnetism+permanent magnet combination
Form, shown in structure such as Fig. 3 (b).The soft magnetic part of poly- magnetic pole piece 4 selects electrical pure iron material, and permanent magnet selects N50
Sintered neodymium iron boron material.The structure size of poly- magnetic pole piece 4 are as follows: a=190mm, b=180mm, c1=85mm, c2=10mm, h=
70mm, H=85mm.In the horizontal direction, magnetizing direction such as Fig. 3 (b) is shown for the direction of magnetization of the permanent magnet of poly- magnetic pole piece 4.
After the assembly is completed, the magnetic field of the axially and radially different location of workspace 6, actually measured work are carried out using gaussmeter
Making the axial magnetic field range of area 6 vertically is 253~257mT, uniformity 99.1%；Workspace 6 radially on axial direction
The range in magnetic field is 246~248mT, uniformity 99.2%.
From above-described embodiment as can be seen that the operating fields of permanent magnetic circuit system of the invention have very high uniformity,
Have lesser discrete when electron beam can be made to move under magnetic fields, therefore having for relativistic magnetron (RM) can be improved
Imitate output power.Compared to electrical excitation system, permanent magnetic circuit system of the invention not complicated water cooling unit and industrial power, knot
Structure is relatively simple and compact, easy to remove and transport, following above to have apparent advantage in mobile platform application.
Claims (11)
1. a kind of relativistic magnetron permanent magnetic circuit system, including anode canister (1), external magnetic circuit and internal magnetic circuit；It is described outer
Portion's magnetic circuit is located at anode canister (1) outside, and internal magnetic circuit is located in anode canister (1), it is characterised in that: the external magnetic circuit includes two
The yoke (3) of permanent-magnetic ring of radial orientation (2) and the described two permanent-magnetic ring of radial orientation (2) of connection；Internal magnetic circuit includes two poly-
Magnetic pole piece (4).
2. relativistic magnetron as described in claim 1 permanent magnetic circuit system, it is characterised in that: described two radial orientations
The direction of magnetization of permanent-magnetic clamp (2) is opposite；It is external that the yoke (3) is set to two permanent-magnetic ring of radial orientation (2).
3. relativistic magnetron as claimed in claim 2 permanent magnetic circuit system, it is characterised in that: two direction of magnetizations are opposite
Permanent-magnetic ring of radial orientation (2) in, a ring is radially the pole S in outer N, another ring is radially the pole N in outer S.
4. relativistic magnetron as described in claim 1 permanent magnetic circuit system, it is characterised in that: the radial orientation permanent magnetism
Ring (2) is bonded by muti-piece sintered permanent magnet respectively, the inner surface of permanent-magnetic ring of radial orientation (2) and poly- magnetic pole piece (4) it is outer
Surface connects.
5. relativistic magnetron as claimed in claim 2 permanent magnetic circuit system, it is characterised in that: the poly- magnetic pole piece (4)
It is internal set on anode canister (1)；Cathode tube (5) are equipped between two poly- magnetic pole pieces (4).
6. relativistic magnetron as claimed in claim 2 permanent magnetic circuit system, it is characterised in that: the anode canister (1), spoke
It is adhesively fixed to orientation permanent-magnetic clamp (2) and yoke (3) by insulating cement.
7. relativistic magnetron as claimed in claim 5 permanent magnetic circuit system, it is characterised in that: described two poly- magnetic pole pieces
(4) it is provided with through-hole, the through-hole diameter of one of them poly- magnetic pole piece (4) is greater than the outer diameter of cathode tube (5).
8. relativistic magnetron as claimed in claim 5 permanent magnetic circuit system, it is characterised in that: the shape of poly- magnetic pole piece (4)
Shape is towards cathode tube (5) in gathering shape.
9. relativistic magnetron as described in claim 1 permanent magnetic circuit system, it is characterised in that: the poly- magnetic pole piece (4)
Material be soft magnetic materials or permanent-magnet material and soft magnetic materials combination, permanent-magnet material part close region (6).
10. relativistic magnetron as claimed in claim 8 permanent magnetic circuit system, it is characterised in that: the poly- magnetic pole piece (4)
Material be electrical pure iron soft magnetic materials or Nd-Fe-B permanent magnet material and electrical pure iron soft magnetic materials combination.
11. relativistic magnetron as described in claim 1 permanent magnetic circuit system, it is characterised in that: permanent magnetic circuit system
Axial workspace length range is 40-150mm, and axial magnetic field homogeneity is better than 80% in workspace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810952890.4A CN109166779B (en) | 2018-08-21 | 2018-08-21 | Permanent magnet magnetic circuit system for relativistic magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810952890.4A CN109166779B (en) | 2018-08-21 | 2018-08-21 | Permanent magnet magnetic circuit system for relativistic magnetron |
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| Publication Number | Publication Date |
|---|---|
| CN109166779A true CN109166779A (en) | 2019-01-08 |
| CN109166779B CN109166779B (en) | 2021-02-09 |
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| CN201810952890.4A Active CN109166779B (en) | 2018-08-21 | 2018-08-21 | Permanent magnet magnetic circuit system for relativistic magnetron |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115295377A (en) * | 2022-09-26 | 2022-11-04 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Permanent magnet focusing system of microwave device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63308846A (en) * | 1988-05-06 | 1988-12-16 | Sanyo Electric Co Ltd | Magnetron |
| CN201788935U (en) * | 2010-09-06 | 2011-04-06 | 安徽华东光电技术研究所 | Structure of multi-beam traveling wave tube permanent magnet focusing system |
| CN104992892A (en) * | 2015-07-17 | 2015-10-21 | 中国工程物理研究院应用电子学研究所 | Permanent-magnet packaging relativistic magnetron |
| CN105590819A (en) * | 2016-03-11 | 2016-05-18 | 中国工程物理研究院应用电子学研究所 | Mixed excitation system of full-chamber extraction relativistic magnetron |
-
2018
- 2018-08-21 CN CN201810952890.4A patent/CN109166779B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63308846A (en) * | 1988-05-06 | 1988-12-16 | Sanyo Electric Co Ltd | Magnetron |
| CN201788935U (en) * | 2010-09-06 | 2011-04-06 | 安徽华东光电技术研究所 | Structure of multi-beam traveling wave tube permanent magnet focusing system |
| CN104992892A (en) * | 2015-07-17 | 2015-10-21 | 中国工程物理研究院应用电子学研究所 | Permanent-magnet packaging relativistic magnetron |
| CN105590819A (en) * | 2016-03-11 | 2016-05-18 | 中国工程物理研究院应用电子学研究所 | Mixed excitation system of full-chamber extraction relativistic magnetron |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115295377A (en) * | 2022-09-26 | 2022-11-04 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Permanent magnet focusing system of microwave device |
| CN115295377B (en) * | 2022-09-26 | 2023-01-13 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Permanent magnet focusing system of microwave device |
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