CN111681864A - Multichannel gyromagnetic filter magnetic circuit - Google Patents
Multichannel gyromagnetic filter magnetic circuit Download PDFInfo
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- CN111681864A CN111681864A CN202010709588.3A CN202010709588A CN111681864A CN 111681864 A CN111681864 A CN 111681864A CN 202010709588 A CN202010709588 A CN 202010709588A CN 111681864 A CN111681864 A CN 111681864A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/38—Auxiliary core members; Auxiliary coils or windings
Abstract
The invention discloses a magnetic circuit of a multi-channel gyromagnetic filter, which belongs to the technical field of magnetic device integration and comprises a lower magnetic circuit (1), an upper magnetic circuit (2), magnetic poles (3) of the upper and lower magnetic circuits, a main coil (4), a compensation coil (5), a coil mounting groove (6) and a multi-channel resonant circuit (7); the coil mounting grooves (6) are positioned on the end faces of the upper magnetic pole column and the lower magnetic pole column (3) and are vertical to the end faces, the end faces of the magnetic pole columns (3) are equally divided into n filter channel integration numbers, the compensation coils (5) are sleeved in the coil mounting grooves (6), and the number of the compensation coils is not less than n-1; the magnetic circuit can realize the frequency compensation capability of 0-200MHz in a P-Ku wave band, the number of stages of a resonant circuit of the filter is not limited, the applicability is wide, and the multi-channel integration of all gyromagnetic filters can be covered; the power consumption of the device is reduced; the frequency modulation range can be compensated and the reliability can be improved; and is favorable for controlling the manufacturing cost of the filter product and improving the production efficiency.
Description
Technical Field
The invention relates to the technical field of magnetic device integration, in particular to a magnetic circuit of a multi-channel gyromagnetic filter.
Background
The gyromagnetic filter is composed of a resonance circuit and a magnetic circuit, wherein the magnetic circuit is of a self-shielding compact structure, and the magnetic poles of the upper and lower magnetic circuits form a working air gapl g The resonant circuit being arranged in the working air gapl g In the working air gap after the current passes through the magnetic circuit coill g Internally generate uniform magnetic fieldH e (the uniform magnetic field is the key for the consistency of the working frequency of each stage of harmonic oscillator in the resonance circuit and the avoidance of the excitation of high-order magnetostatic mode). After the resonant circuit meets the resonant condition, the resonant frequencyf 0 Mainly by the working air gap fieldH e And (4) determining. Meanwhile, as for the spherical harmonic oscillator,f 0 removing and mixingH e In addition, the magnetic crystal anisotropic field of the small ballH k Demagnetization fieldH d And exchange energy equivalent fieldH a And (4) correlating. Therefore, the frequency consistency index of the multi-channel integrated gyromagnetic filter is subjected toH e 、H k 、H d 、H a And the like.
A typical two-channel integrated design in the prior art is shown in fig. 1, and includes a lower magnetic circuit 1, an upper magnetic circuit 2, a pole post 3 of the upper and lower magnetic circuits, a main coil 4, a hollow compensation coil 9, and an integrated resonant circuit 8, in order to ensure the consistency of the operating frequencies of the two filters, the magnetic circuit unit needs to be manufactured by a precise process to control the operating air gap field with precisionH e Uniformity, two-way resonant circuit parameters and process parameters also need to be highly consistent to controlH k 、H d 、H a The effect on the operating frequency. An air-core compensation coil 9 is arranged at the position of one filter harmonic oscillatorThe coil can be arranged in the resonant circuit or adhered to the surface of the magnetic pole), the coil can be excited by current to enable the working frequency of the two filters to realize different frequency tracking within a certain range, and meanwhile, the current compensation function of the exciter can be utilized to compensate frequency tracking errors.
The problems and defects of the prior art are mainly as follows:
1) the manufacturing scheme has high cost
The process manufacturing precision of the magnetic circuit and the resonant circuit and the parameter consistency of the resonant circuit have high control cost and low production efficiency;
2) poor magnetic field uniformity of the hollow compensation coil
The magnetic field generated in the hollow coil has poor uniformity, easily excites a high-order magnetostatic mode of a resonance circuit and influences the frequency consistency of harmonic oscillators at all levels, so that the hollow compensation coil is only suitable for a filter with few resonance levels;
3) the frequency tuning compensation range of the hollow compensation coil is small
Limited by air gaps or resonant circuit space, the compensating coil can be wound with few turns or only adopts a small wire diameter, and has low tuning sensitivity and small current bearing capacity, so that the frequency tuning compensation range of the compensating coil is small;
4) increased product power consumption
The FM coil has a certain thickness, and no matter the FM coil is installed in the resonance circuit or is adhered on the end face of the magnetic pole, the length of the working air gap is increasedl g The tuning sensitivity of the main coil is reduced, and the power consumption of the product is increased.
Disclosure of Invention
The present invention is directed to a magnetic circuit of a multi-channel gyromagnetic filter to solve the above problems.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a magnetic circuit of a multi-channel gyromagnetic filter comprises a lower magnetic circuit, an upper magnetic circuit, magnetic pole columns of the upper and lower magnetic circuits, a main coil, a compensation coil, a coil mounting groove and a multi-channel resonant circuit; the coil mounting groove is located on the end face and the vertical end face of the upper magnetic pole and the lower magnetic pole, the end face of the magnetic pole is equally divided into the integrated number n of filter channels, and the compensation coil is sleeved in the coil mounting groove.
The basic structure of the compensation coil is similar to that of the air core compensation coil in the prior art, but the installation modes of the compensation coil and the air core compensation coil are different, so that the functions of the compensation coil are remarkably different; specifically, the 'hollow compensation coil' in the prior art is arranged on the surface of a magnetic pole or in a resonant circuit and limited in spatial position, and the number of turns of the coil is limited.
As a preferred technical scheme: the coil mounting grooves are symmetrically arranged on the end faces of the upper magnetic pole and the lower magnetic pole, so that the upper magnetic pole and the lower magnetic pole form working air gaps of the integrated number of filter channels, and the multi-channel resonance circuit is respectively arranged in each working air gap.
As a preferred technical scheme: the size of the coil mounting groove meets the requirement of placing one or two paths of compensation coils side by side.
As a preferred technical scheme: the compensation coil is arbitrarily arranged in the coil mounting groove of the upper and lower magnetic poles,
more preferably, two compensation coils are used to be connected in series after the pole posts of the upper and lower magnetic circuits are installed, respectively, in such a way as to achieve a larger frequency compensation range, see example 3.
As a preferred technical scheme: the compensation coils are respectively led out and then connected with respective current exciters, so that independent frequency compensation of each subarea can be realized.
As a preferred technical scheme: the number of the compensation coils is determined according to the channel integration number and the frequency compensation range, and is not less than n-1 (n is the filter channel integration number). That is, the channel without the compensation coil is set as a reference channel, the frequency of the channel excited by the main coil is the reference frequency, and the frequency difference between the other channels and the reference frequency is compensated by the respective compensation coil, so that the frequency consistency of the channels is realized.
The invention provides a magnetic circuit structure of a multi-channel filter, which is realized in the way that the end faces of an upper magnetic pole and a lower magnetic pole are grooved to form air gap field partitions with the number consistent with that of integrated channels, a multi-channel integrated resonance circuit is respectively arranged in each air gap field partition, a compensation coil is arranged in the groove, each air gap field partition has an independent magnetic compensation function after being led out, and the frequency consistent compensation of the multi-channel filter is realized;
according to the invention, the compensation coil is arranged in the slot of the end face of the pole column, the number of turns of the compensation coil can be increased through the size design of the slot, and the frequency compensation capability is improved; the compensation coil is arranged in the slot of the end face of the magnetic pole column, so that the problem of poor uniformity of the hollow compensation coil adopted in the prior art is avoided, the high uniformity of the excitation magnetic field of the compensation coil is realized, and the adverse effect on the technical index of the filter is reduced;
the magnetic circuit of the multi-channel filter can realize the frequency compensation capability of 0-200MHz in a P-Ku wave band due to the adoption of the structure, and has very remarkable advantages compared with the frequency modulation range which is not more than 50MHz in the prior art.
Compared with the prior art, the invention has the advantages that:
1) the compensating coil is arranged in the slot of the end face of the magnetic pole column, the uniformity of the magnetic field generated by the coil is determined by the magnetic circuit, the problem that the high-order magnetostatic mode is easily excited due to the uniformity and the difference of the magnetic field of the hollow coil is solved, the number of stages of the resonant circuit of the filter is not limited, the applicability is wide, and the multi-channel integration of all gyromagnetic filters can be covered;
2) the compensation coil is arranged in the slot of the end face of the pole column and does not occupy the length of the working air gapl g Space is favorable for reducing power consumption of the device;
3) the compensating coil is arranged in a slot on the end face of the magnetic pole column, the sensitivity of the coil with unit turns is larger than that of an air-core coil arranged in the resonance circuit or adhered to the end face of the magnetic pole, and the frequency modulation range of the compensating coil is increased;
4) the width and the depth of the partition groove can be designed according to the number of turns of the coil and the wire diameter, so that the compensation frequency modulation range can be controlled, and the reliability can be improved;
5) the control accuracy of the process manufacturing accuracy of the magnetic circuit and the resonant circuit and the parameter consistency of the resonant circuit are reduced, and the control of the manufacturing cost of the filter product and the improvement of the production efficiency are facilitated.
Drawings
FIG. 1 is a diagram of a conventional gyromagnetic filter integrated structure in the prior art;
FIG. 2 is a schematic diagram of the structure of the multi-channel gyromagnetic filter magnetic circuit according to the present invention;
fig. 3 is a schematic diagram of a four-division design of a rectangular pole and a mounting manner of a compensation coil according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of a four-division design of a cylindrical pole piece and an installation manner of a compensation coil according to embodiment 2 of the present invention;
fig. 5 is a schematic diagram of a rectangular pole two-section design and a compensation coil installation method of embodiment 3 of the present invention.
In the figure: 1. a lower magnetic circuit; 2. an upper magnetic circuit; 3. a magnetic pole column; 4. a main coil; 5. a compensation coil; 6. a coil mounting groove; 7. a multi-channel resonant circuit; 8. an integrated resonant circuit; 9. and an air-core compensation coil.
Detailed Description
The invention will be further explained with reference to the drawings.
Example 1: X-Ku waveband rectangular magnetic pole four-channel integrated magnetic circuit
Referring to fig. 2 and 3, the X-Ku band rectangular pole four-channel integrated magnetic circuit: the magnetic pole comprises a lower magnetic circuit 1, an upper magnetic circuit 2, magnetic pole columns 3 of the upper and lower magnetic circuits, a main coil 4, a compensation coil 5, a coil mounting groove 6 and a multi-path resonance circuit 7; coil mounting groove 6 is located 3 terminal surfaces of magnetic pole post and the perpendicular terminal surface of upper and lower magnetic circuit, and 3 terminal surfaces of magnetic pole post of upper and lower magnetic circuit divide equally into four parts respectively, 5 covers of compensating coil are in coil mounting groove 6, and 5 quantity of compensating coil is 3, and in this embodiment, 3 compensating coil 5 are drawn forth respectively and are connected respective current exciter, can realize the independent frequency compensation of each subregion, specifically:
firstly, as mentioned above, the prior art is to install an air core coil on the end face of the magnetic pole or inside the resonant circuit, because the magnetic field generated by the air core coil is poor in uniformity, the air core coil is only suitable for the resonant circuit with 1-2 stages of harmonic oscillators (the resonant stage number of the channel filter for installing the compensation coil is only 1 stage as shown in fig. 1), while the current gyromagnetic filter products all adopt the resonant circuit with more than 3 stages of harmonic oscillators, and the air core coil structure cannot meet the requirement of magnetic field uniformity, so the prior art is not suitable for the application of the current multi-channel and multi-stage resonant gyromagnetic filter;
then, in the invention, a plurality of magnetic field subareas are formed on the magnetic pole, and after the compensating coil is arranged in the coil mounting groove 6, the influence of the exciting magnetic field of the compensating coil of each subarea on the other subareas is negligibly small. For example, in this embodiment, when the excitation current of one of the compensation coils of the magnetic partition is 50mA, the partition can obtain 75MHz frequency compensation, and according to the principle that the magnetic fluxes of the partitions are distributed in inverse proportion to the magnitudes of the magnetic resistances, the excitation has only a few tens of KHz magnitude on the frequencies of the other partitions, so that the compensation coils are led out to realize the independent frequency compensation of the partitions.
The four-way resonant circuit of the embodiment is distributed in parallel in two rows, the rectangular magnetic pole posts 3 are adopted, the groove width and the groove depth of the coil mounting groove 6 are 2mm and 3.5mm, the number of turns of the compensating coil 5 is 50, the tuning sensitivity of the compensating coil is 1.5MHz/mA, and the current of 0-50mA has the frequency compensation capacity of 0-75 MHz. The partition where the compensation coil is not installed in this embodiment example is a reference channel partition.
Example 2: S-C waveband cylindrical magnetic pole four-channel integrated magnetic circuit
Referring to fig. 2 and 4, the S-C band rectangular pole four-channel integrated magnetic circuit: the magnetic pole comprises a lower magnetic circuit 1, an upper magnetic circuit 2, magnetic pole columns 3 of the upper and lower magnetic circuits, a main coil 4, a compensation coil 5, a coil mounting groove 6 and a multi-path resonance circuit 7; the coil mounting grooves 6 are positioned on the end surfaces and vertical to the end surfaces of the magnetic pole columns 3 of the upper and lower magnetic circuits, the end surfaces of the magnetic pole columns 3 of the upper and lower magnetic circuits are respectively divided into four parts, the compensation coils 5 are sleeved in the coil mounting grooves 6, the number of the compensation coils 5 is 4, and in the embodiment, 4 compensation coils 5 are respectively connected with respective current exciters after being respectively led out;
the four-way resonant circuit of the embodiment is distributed in a circular shape, a cylindrical magnetic pole column 3 is adopted, the groove width of a coil mounting groove 6 is 2mm, the groove depth is 4mm, a 4mm deep round hole is dug in the center of the magnetic pole column 3, the number of turns of a compensation coil 5 is 50, the tuning sensitivity of the compensation coil is 1MHz/mA, and 0-50mA current has the frequency compensation capacity of 0-50 MHz. The four compensation coils are adopted in the implementation example, so that the flexibility is high, and the method can adapt to any adjustment of the reference channel in production.
Example 3: S-C wave band rectangular magnetic pole two-channel different-frequency tracking magnetic circuit
Referring to fig. 2 and 5, the two-channel different-frequency tracking magnetic circuit of the S-C band rectangular magnetic pole column: the magnetic pole comprises a lower magnetic circuit 1, an upper magnetic circuit 2, magnetic pole columns 3 of the upper and lower magnetic circuits, a main coil 4, a compensation coil 5, a coil mounting groove 6 and two resonant circuits 7; the coil mounting grooves 6 are located on the end faces of the magnetic pole columns 3 of the upper magnetic circuit and the lower magnetic circuit and are perpendicular to the end faces, the end faces of the magnetic pole columns 3 of the upper magnetic circuit and the lower magnetic circuit are divided into two parts respectively, the compensation coils 5 are sleeved in the coil mounting grooves 6, the number of the compensation coils 5 is 2, the compensation coils are located in the coil mounting grooves of the same partition of the upper magnetic circuit and the lower magnetic circuit respectively, and the compensation coils are connected in series according to the. In the embodiment, the compensation coil 5 which is connected in series up and down is led out and then connected with a current exciter;
the two resonant circuits of the embodiment are arranged in parallel, the rectangular magnetic pole 3 is adopted, the groove width of the coil mounting groove 6 is 3mm, the groove depth is 4mm, the number of turns of a single compensation coil 5 is 100, the upper and lower compensation coils are 200 turns, the tuning sensitivity is 4MHz/mA after the two compensation coils are connected in series, the 0-50mA current has the frequency offset compensation capability of 0-200MHz, and the different frequency tracking of the frequency of the two filters of 0-200MHz can be realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, as any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention, such as different numbers of channels, different shapes of magnetic pole posts, different widths of slot depths of coil mounting slots, different numbers of coil turns, and frequency compensation ranges, should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a multichannel gyromagnetic filter magnetic circuit, includes magnetic pole post (3) and main coil (4) of lower magnetic circuit (1), last magnetic circuit (2), upper and lower magnetic circuit, its characterized in that: the coil-winding device also comprises a compensation coil (5), a coil mounting groove (6) and a multi-channel resonance circuit (7); the coil mounting groove (6) is located on the end face and the vertical end face of the upper magnetic pole column (3) and the lower magnetic pole column (3), the end face of the magnetic pole column (3) is equally divided into the integrated number n of filter channels, and the compensation coil (5) is sleeved in the coil mounting groove (6).
2. A multi-channel gyromagnetic filter magnetic circuit as claimed in claim 1, wherein: the coil mounting grooves (6) are symmetrically arranged on the end faces of the upper magnetic pole and the lower magnetic pole, so that the upper magnetic pole and the lower magnetic pole form working air gaps of the integrated number of filter channels, and the multi-channel resonant circuits (7) are respectively arranged in the working air gaps.
3. A multi-channel gyromagnetic filter magnetic circuit as claimed in claim 1, wherein: the size of the coil mounting groove (6) meets the requirement that one or two compensating coils (5) are arranged side by side.
4. A multi-channel gyromagnetic filter magnetic circuit as claimed in claim 1, wherein: the compensation coils (5) are installed in the coil installation grooves (6) of the upper magnetic pole and the lower magnetic pole at will, or the two compensation coils (5) are installed in series after being respectively installed on the magnetic poles (3) of the upper magnetic circuit and the lower magnetic circuit.
5. A multi-channel gyromagnetic filter magnetic circuit as claimed in claim 1, wherein: the compensation coils (5) are respectively led out and then connected with respective current exciters.
6. A multi-channel gyromagnetic filter magnetic circuit as claimed in claim 1, wherein: the number of the compensation coils (5) is determined according to the channel integration number and the frequency compensation range, and is not less than n-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010709588.3A CN111681864A (en) | 2020-07-22 | 2020-07-22 | Multichannel gyromagnetic filter magnetic circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010709588.3A CN111681864A (en) | 2020-07-22 | 2020-07-22 | Multichannel gyromagnetic filter magnetic circuit |
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| CN111681864A true CN111681864A (en) | 2020-09-18 |
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| CN202010709588.3A Pending CN111681864A (en) | 2020-07-22 | 2020-07-22 | Multichannel gyromagnetic filter magnetic circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115236882A (en) * | 2022-09-23 | 2022-10-25 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Mechanical thermal compensation-free wide-temperature Faraday optical rotator |
-
2020
- 2020-07-22 CN CN202010709588.3A patent/CN111681864A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115236882A (en) * | 2022-09-23 | 2022-10-25 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Mechanical thermal compensation-free wide-temperature Faraday optical rotator |
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