CN105679494A - Adjustable inductor - Google Patents
Adjustable inductor Download PDFInfo
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- CN105679494A CN105679494A CN201610148149.3A CN201610148149A CN105679494A CN 105679494 A CN105679494 A CN 105679494A CN 201610148149 A CN201610148149 A CN 201610148149A CN 105679494 A CN105679494 A CN 105679494A
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- phase
- magnetic core
- metamagnetic materials
- curie temperature
- variable inductor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F21/00—Variable inductances or transformers of the signal type
- H01F21/02—Variable inductances or transformers of the signal type continuously variable, e.g. variometers
- H01F21/08—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by varying the permeability of the core, e.g. by varying magnetic bias
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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
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F2003/106—Magnetic circuits using combinations of different magnetic materials
Abstract
The invention discloses an adjustable inductor used for achieving automatic adjustment on inductance with a temperature. The adjustable inductor comprises a magnetic core body, wherein a coil is wound around the magnetic core body, the magnetic core body comprises a first magnetic core and a second magnetic core, the first magnetic core and the second magnetic core are connected to form a magnetic flux loop of the adjustable inductor, and the first magnetic core and/or the second magnetic core is made of at least two magnetic materials with different curie temperatures. The adjustable inductor is made of at least two magnetic materials with different curie temperatures; when the adjustable inductor is applied to an occasion requiring different inductances under different temperatures and the temperature of the adjustable inductor is larger than or equal to the curie temperature of one of the magnetic materials, the inductance of the magnetic core body becomes small, the automatic adjustment on the inductance with the temperature is achieved, an extra auxiliary adjustment structure is not needed, an extra temperature sensor is also not needed, the miniature device is promoted, and the production cost is favorably reduced.
Description
Technical field
The present invention relates to field of electrical components, particularly relate to a kind of variable inductor.
Background technology
Existing a lot of circuit is all integrated with safety monitoring function, and it can sensor circuit temperature change, and when circuit temperature is too high or too low, by changing the relevant parameter in circuit, to realize the effect etc. of protection circuit.
Inducer, as one of conventional electronic component, is realize the element that the functions such as energy storage, filtering, tuning are indispensable. Variable inductor is the inducer of a kind of adjustable inductance amount, is widely used in various electronic circuit.
When existing variable inductor needs the occasion of different induction amount under being applied to different temperatures, its restriction is bigger. Because the middle column length that the design of existing variable inductor is typically all the number of turns by regulating winding winding or magnetic core realizes. Wherein, the number of turns limitation of regulating winding winding is obvious; And change the air gap amount in inductance magnetic circuit by regulating the middle column length of magnetic core, and then this mode changing inductance value is applied comparatively general. But no matter adopt which kind of mode, generally all can design corresponding auxiliary adjustment structure and coordinated, and then reach the effect of adjusting inductance. Variable inductor is owing to containing auxiliary adjustment structure, device miniaturization, integrated difficulty, power density is little; Owing to auxiliary adjustment structure mostly is frame for movement, its degree of regulation is not high, so that the stability of variable inductor parameter, concordance are poor. In addition it is also necessary to the association realized between auxiliary adjustment structure and temperature.
Summary of the invention
It is an object of the invention to provide a kind of variable inductor, solve above technical problem.
For reaching this purpose, the present invention by the following technical solutions:
A kind of variable inductor, including core body, described core body is wound with coil, and described core body includes the first magnetic core and the second magnetic core; Described first magnetic core and described second magnetic core connect, and form the flux circuit of variable inductor;
Described first magnetic core and/or described second magnetic core adopt the magnetic material of at least two difference Curie temperature to make.
The variable inductor that the present embodiment provides adopts the magnetic material of at least two difference Curie temperature to make, when needing the occasion of different induction amount under being applied to different temperatures, when the temperature of variable inductor is be more than or equal to the Curie temperature of one of which magnetic material, ferromagnet is paramagnetic phase from ferromagnetic phase in version, the pcrmeability of this magnetic material portion almost becomes 0, therefore be equivalent to add the air gap of core body, magnetic resistance becomes big, and then make core body inductance value diminish, realize the inductance value automatic adjustment with temperature, to realize monitoring temperature, waiting of protection circuit acts on, the variable inductor that the present embodiment provides is without extra auxiliary adjustment structure, and owing to the temperature of variable inductor self is approximately equivalent to the temperature of place environment, therefore without adding extra temperature sensor, be conducive to device miniaturization, Highgrade integration, due to the stable phase change temperature of magnetic material, adopting the mode of phase transition temperature adjusting inductance, more accurately, concordance is higher.
Preferably, described magnetic material includes body magnetic material and phase metamagnetic materials;
Described first magnetic core and/or described second magnetic core include at least one phase transformation adjustment portion, and described phase transformation adjustment portion is arranged on described flux circuit;
Described phase transformation adjustment portion adopts described phase metamagnetic materials to make, and the remainder of described first magnetic core and/or the second magnetic core adopts described body magnetic material to make;
The Curie temperature of described body magnetic material is more than the Curie temperature of described phase metamagnetic materials;
Wherein, the Curie temperature of described phase metamagnetic materials is default phase transition temperature threshold value.
Preferably, described magnetic material includes body magnetic material and phase metamagnetic materials; Described phase metamagnetic materials includes first-phase metamagnetic materials, second-phase metamagnetic materials and third phase metamagnetic materials;
Described first magnetic core and/or described second magnetic core include first-phase modified tone joint portion, second-phase modified tone joint portion, third phase modified tone joint portion; Described first-phase modified tone joint portion, described second-phase modified tone joint portion, described third phase modified tone joint portion may be contained within described flux circuit;
Described first-phase modified tone joint portion adopts described first-phase metamagnetic materials to make, and described second-phase modified tone joint portion adopts described second-phase metamagnetic materials to make, and described third phase modified tone joint portion adopts described third phase metamagnetic materials to make;
The Curie temperature of described body magnetic material is more than the Curie temperature of described first-phase metamagnetic materials, the Curie temperature of described first-phase metamagnetic materials is more than the Curie temperature of described second-phase metamagnetic materials, and the Curie temperature of described first-phase metamagnetic materials is more than the Curie temperature of described third phase metamagnetic materials;
Wherein, the Curie temperature of described first-phase metamagnetic materials is default first-phase temperature threshold value; The Curie temperature of described second-phase metamagnetic materials is default second-phase temperature threshold value; The Curie temperature of described third phase metamagnetic materials is default third phase temperature threshold value.
In the present embodiment, according to predetermined phase transition temperature threshold value, choose corresponding phase metamagnetic materials, to realize regulating the inductance value of magnetic core according to phase transition temperature, and can according to the different one or more phase transition temperature threshold values of requirements set, only need to add several different magnetic material on the magnetic circuit of magnetic core, very convenient, and also cost is less.
Preferably, the Curie temperature of described body magnetic material is more than 160 degrees Celsius;
Described first-phase temperature threshold value is 125 ± 5 degrees Celsius; Described second-phase temperature threshold value is 105 ± 5 degrees Celsius; Described third phase temperature threshold value is 85 ± 5 degrees Celsius;
Corresponding, the Curie temperature of described first-phase metamagnetic materials is 125 ± 5 degrees Celsius; The Curie temperature of described second-phase metamagnetic materials is 105 ± 5 degrees Celsius; The Curie temperature of described third phase metamagnetic materials is 85 ± 5 degrees Celsius.
Preferably, described first magnetic core and/or described second magnetic core are E-type magnetic core;
Described E-type magnetic core includes support member; The middle part of described support member is provided with coiling center pillar; Described coil is wound on described coiling center pillar;
The both ends of described support member are additionally provided with the first side column and the second side column; Described first side column and described second side column are symmetrically disposed on described coiling center pillar both sides.
Preferably, described coiling center pillar includes at least one described phase transformation adjustment portion.
Preferably, described first side column and/or the second side column include at least one described phase transformation adjustment portion.
Preferably, described support member includes at least one described phase transformation adjustment portion.
Preferably, described first magnetic core and described second magnetic core are E-type magnetic core;
Described coil is wound on the coiling center pillar of described first magnetic core and the coiling center pillar of described second magnetic core;
Described first magnetic core and described second magnetic core docking form the flux circuit of variable inductor.
Preferably, described phase metamagnetic materials is nickel-zinc ferrite or manganese-zinc ferrite.
Beneficial effects of the present invention: the variable inductor that the present embodiment provides adopts the magnetic material of at least two difference Curie temperature to make, when needing the occasion of different induction amount under being applied to different temperatures, when the temperature of variable inductor is be more than or equal to the Curie temperature of one of which magnetic material, ferromagnet is paramagnetic phase from ferromagnetic phase in version, the pcrmeability of this magnetic material portion almost becomes 0, therefore be equivalent to add the air gap of core body, magnetic resistance becomes big, and then make core body inductance value diminish, realize the inductance value automatic adjustment with temperature, to realize monitoring temperature, waiting of protection circuit acts on, and without extra auxiliary adjustment structure, and owing to the temperature of variable inductor self is approximately equivalent to the temperature of place environment, therefore without adding extra temperature sensor, be conducive to device miniaturization, Highgrade integration and reduction production cost, due to the stable phase change temperature of magnetic material, adopting the mode of phase transition temperature adjusting inductance, more accurately, concordance is higher.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the variable inductor that Fig. 1 provides for the embodiment of the present invention.
The structural representation of the E-type magnetic core that Fig. 2 provides for the embodiment of the present invention.
A kind of structural representation of the core body that Fig. 3 provides for the embodiment of the present invention.
The another kind of structural representation of the core body that Fig. 4 provides for the embodiment of the present invention.
The A-A of the variable inductor that Fig. 5 provides for the embodiment of the present invention is to schematic cross-section.
Another structural representation of the core body that Fig. 6 provides for the embodiment of the present invention.
In figure:
10, core body; 20, coil; 11, the first magnetic core; 12, the second magnetic core; 31, support member; 32, coiling center pillar; 33, the first side column; 34, the second side column; 121, first-phase modified tone joint portion; 122, second-phase modified tone joint portion; 123, third phase modified tone joint portion.
Detailed description of the invention
Embodiments provide a kind of variable inductor, for realizing the inductance value automatic adjustment with temperature.
For making the goal of the invention of the present invention, feature, the advantage can be more obvious and understandable, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, the embodiments described below are only a part of embodiment of the present invention, and not all embodiment. Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Technical scheme is further illustrated below in conjunction with accompanying drawing and by detailed description of the invention.
Refer to the structural representation of the variable inductor that Fig. 1, Fig. 1 provide for the embodiment of the present invention. This variable inductor includes core body 10 and coil 20. Coil 20 is wound in core body 10.
Preferably, refer to the structural representation of the E-type magnetic core that Fig. 2 and Fig. 3, Fig. 2 provide for the embodiment of the present invention, a kind of structural representation of the core body that Fig. 3 provides for the embodiment of the present invention.
Core body 10 includes the first magnetic core 11 and the second magnetic core 12. In the present embodiment, the first magnetic core 11 second magnetic core 12 is E-type magnetic core.
Concrete, described E-type magnetic core includes support member 31; The middle part of support member 31 is provided with coiling center pillar 32; Coil 20 is wound on coiling center pillar 32; The both ends of support member 31 are additionally provided with the first side column 33 and the second side column 34; First side column 33 and the second side column 34 are symmetrically disposed on coiling center pillar 32 both sides. First magnetic core 11 and the second magnetic core 12 dock, and form the flux circuit of the variable inductor of Guan Bi.
Wherein, the first magnetic core 11 and/or the second magnetic core 12 adopt the magnetic material of at least two difference Curie temperature to make.
Described magnetic material includes body magnetic material and phase metamagnetic materials;
First magnetic core 11 and/or the second magnetic core 12 include at least one phase transformation adjustment portion, and described phase transformation adjustment portion is arranged on described flux circuit; Described phase transformation adjustment portion adopts described phase metamagnetic materials to make, and the remainder of the first magnetic core 11 and/or the second magnetic core 12 adopts described body magnetic material to make; The Curie temperature of described body magnetic material is more than the Curie temperature of described phase metamagnetic materials; Wherein, the Curie temperature of described phase metamagnetic materials is default phase transition temperature threshold value.
Refer to Fig. 3, it is a kind of preferred embodiment of the present invention.
In this one preferred embodiment, described phase metamagnetic materials includes first-phase metamagnetic materials, second-phase metamagnetic materials and third phase metamagnetic materials, and described second magnetic core 12 includes first-phase modified tone joint portion 121, second-phase modified tone joint portion 122, third phase modified tone joint portion 123; Concrete, the first side column 33 being provided with first-phase modified tone joint portion 121, coiling center pillar 32 is provided with second-phase modified tone joint portion 122, the second side column 34 is provided with third phase modified tone joint portion 123, position is respectively positioned on described flux circuit. First-phase modified tone joint portion 121 adopts described first-phase metamagnetic materials to make, and second-phase modified tone joint portion 122 adopts described second-phase metamagnetic materials to make, and third phase modified tone joint portion 123 adopts described third phase metamagnetic materials to make.
Wherein, the Curie temperature of body magnetic material is more than the Curie temperature of described first-phase metamagnetic materials, the Curie temperature of described first-phase metamagnetic materials is more than the Curie temperature of described second-phase metamagnetic materials, and the Curie temperature of described first-phase metamagnetic materials is more than the Curie temperature of described third phase metamagnetic materials.
The Curie temperature of described first-phase metamagnetic materials is default first-phase temperature threshold value; The Curie temperature of described second-phase metamagnetic materials is default second-phase temperature threshold value; The Curie temperature of described third phase metamagnetic materials is default third phase temperature threshold value.
In the present embodiment, according to predetermined phase transition temperature threshold value, choose corresponding phase metamagnetic materials, to realize regulating the inductance value of core body 10 according to phase transition temperature, and can according to the different one or more phase transition temperature threshold values of requirements set, only need to add several different magnetic material on the magnetic circuit of core body 10, very convenient, and also cost is less.
Refer to the another kind of structural representation of the core body that Fig. 4, Fig. 4 provide for the embodiment of the present invention. It is the another kind preferably embodiment of the present invention.
In this another kind preferably embodiment, concrete, first-phase modified tone joint portion 121, second-phase modified tone joint portion 122, third phase modified tone joint portion 123 are arranged on coiling center pillar 32.
For ease of understanding, refer to the A-A of the variable inductor that Fig. 5, Fig. 5 provide for the embodiment of the present invention to schematic cross-section. After first magnetic core 11 and the docking of the second magnetic core 12, the flux circuit of Guan Bi can be formed.
The variable inductor that the present embodiment provides adopts the magnetic material of at least two difference Curie temperature to make, when needing the occasion of different induction amount under being applied to different temperatures, when the temperature of variable inductor is be more than or equal to the Curie temperature of one of which magnetic material, a part of ferromagnet of core body 10 is paramagnetic phase from ferromagnetic phase in version, the pcrmeability of this magnetic material portion almost becomes 0, therefore be equivalent to add the air gap of core body 10, magnetic resistance becomes big, and then make core body 10 inductance value diminish, realize the inductance value automatic adjustment with temperature, to realize monitoring temperature, waiting of protection circuit acts on, the variable inductor that the present embodiment provides is without extra auxiliary adjustment structure, and owing to the temperature of variable inductor self is approximately equivalent to the temperature of place environment, therefore without adding extra temperature sensor, be conducive to device miniaturization, Highgrade integration, due to the stable phase change temperature of magnetic material, adopting the mode of phase transition temperature adjusting inductance, more accurately, concordance is higher.
Concrete, the computing formula of inductance is L=μ0μrN2Se/le, wherein, μ0For constant, i.e. 4 π × 10-7H m, μrFor material permeability, leAnd SeThe cross-sectional area that respectively length of magnetic circuit and magnetic flux pass through, N is coil turn.
Concrete, the Curie temperature of described body magnetic material is more than 160 degrees Celsius; Described first-phase temperature threshold value is 125 ± 5 degrees Celsius; Described second-phase temperature threshold value is 105 ± 5 degrees Celsius; Described third phase temperature threshold value is 85 ± 5 degrees Celsius; Corresponding, the Curie temperature of described first-phase metamagnetic materials is 125 ± 5 degrees Celsius; The Curie temperature of described second-phase metamagnetic materials is 105 ± 5 degrees Celsius; The Curie temperature of described third phase metamagnetic materials is 85 ± 5 degrees Celsius. In this another kind preferably embodiment, the inductance value of variable inductor and the one of temperature group of test data are such as shown in following table table one:
| Inductance value | Inductance value | Inductance value | Inductance value | |
| Temperature | Less than 85 DEG C | 85±5℃ | 105±5℃ | 125±5℃ |
| Inductance value | 1500uH ± 10% | 100uH ± 10% | 60uH ± 10% | 40uH ± 10% |
Table one
In the present embodiment; on support arm 31, coiling center pillar the 32, first side column 33 and/or the second side column 34 all on the flux circuit of core body 10; therefore support arm 31, coiling center pillar the 32, first side column 33 and/or the second side column 34 all can arrange phase transformation adjustment portion; its particular location can be adjusted according to demand, but all should within protection scope of the present invention.
Refer to another structural representation of the core body 10 that Fig. 6, Fig. 6 provide for the embodiment of the present invention. In this embodiment, variable inductor adopts the magnetic material of at least two difference Curie temperature to make, when needing the occasion of different induction amount under being applied to different temperatures, when the temperature of variable inductor is be more than or equal to the Curie temperature of one of which magnetic material, the ferromagnet of appropriate section is paramagnetic phase from ferromagnetic phase in version, and the pcrmeability of this magnetic material portion almost becomes 0, therefore the effective cross section being equivalent to reduce magnetic circuit is amassed, magnetic resistance becomes big, and then makes the inductance value of core body 10 diminish. As shown in Figure 6, along with temperature reaches 85 degrees Celsius, losing efficacy in first-phase modified tone joint portion 121, effectively transversal diminishes, at 105 ± 5 DEG C, losing efficacy in second-phase modified tone joint portion 122, effective cross section is long-pending to diminish again, at 125 ± 5 DEG C, lost efficacy in third phase modified tone joint portion 123, effective cross section is long-pending to diminish again, by constantly reducing the effective cross section of magnetic circuit, inductance value can be made constantly to diminish. In this embodiment, the inductance value of variable inductor and the one of temperature group of test data are such as shown in following table table two:
| Inductance value | Inductance value | Inductance value | Inductance value | |
| Temperature | Less than 85 DEG C | 85±5℃ | 105±5℃ | 125±5℃ |
| Inductance value | 120uH ± 10% | 80uH ± 10% | 60uH ± 10% | 50uH ± 10% |
Table two
In the present embodiment, described phase metamagnetic materials is preferably nickel-zinc ferrite or manganese-zinc ferrite, and the controlled range of its Curie temperature, at 80-300 degree Celsius, meets the present invention requirement to phase metamagnetic materials. But it is understood that, according to the thought of the present invention, described phase metamagnetic materials is replaced with other materials, but it produces the technique effect same or like with the present invention, all should within protection scope of the present invention.
In embodiment; first-phase modified tone joint portion 121, second-phase modified tone joint portion 122, third phase modified tone joint portion 123 are arranged on the second magnetic core 12; it should not be construed as limitation of the present invention; it is understandable that; first-phase modified tone joint portion 121, second-phase modified tone joint portion 122, third phase modified tone joint portion 123 may also be disposed on the first magnetic core 11, all should within protection scope of the present invention.
In the present invention, core body 10 includes two identical E-type magnetic cores of structure, i.e. the first magnetic core 11 and the second magnetic core 12, it is to be understood that the first magnetic core 11 and the second magnetic core 12 can be Split type structure, it is possible to be structure as a whole, all should within protection scope of the present invention.
In the present invention; first magnetic core 11 and the second magnetic core 12 are E-type magnetic core; its structure that should not be construed as the core body 10 to the present invention is defined; it is understandable that; when the first magnetic core 11 or the second magnetic core 12 are E-type magnetic core, accordingly, the second magnetic core 12 or the first magnetic core 11 can be one square; the technique effect that it produces and embodiments of the invention are same or like, all should within protection scope of the present invention.
It is understandable that; first magnetic core 11 and/or the second magnetic core 12 also can adopt the magnetic core of other shapes; magnetic core such as U-shaped or I shape; by arranging different phase metamagnetic materials on the flux circuit of Guan Bi; it also can realize inductance value variation with temperature, therefore it also should within protection scope of the present invention.
The above, above example only in order to technical scheme to be described, is not intended to limit; Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a variable inductor, including core body, described core body is wound with coil, it is characterised in that described core body includes the first magnetic core and the second magnetic core;Described first magnetic core and described second magnetic core connect, and form the flux circuit of variable inductor;
Described first magnetic core and/or described second magnetic core adopt the magnetic material of at least two difference Curie temperature to make.
2. variable inductor according to claim 1, it is characterised in that described magnetic material includes body magnetic material and phase metamagnetic materials;
Described first magnetic core and/or described second magnetic core include at least one phase transformation adjustment portion, and described phase transformation adjustment portion is arranged on described flux circuit;
Described phase transformation adjustment portion adopts described phase metamagnetic materials to make, and the remainder of described first magnetic core and/or the second magnetic core adopts described body magnetic material to make;
The Curie temperature of described body magnetic material is more than the Curie temperature of described phase metamagnetic materials;
Wherein, the Curie temperature of described phase metamagnetic materials is default phase transition temperature threshold value.
3. variable inductor according to claim 2, it is characterised in that described magnetic material includes body magnetic material and phase metamagnetic materials; Described phase metamagnetic materials includes first-phase metamagnetic materials, second-phase metamagnetic materials and third phase metamagnetic materials;
Described first magnetic core and/or described second magnetic core include first-phase modified tone joint portion, second-phase modified tone joint portion, third phase modified tone joint portion; Described first-phase modified tone joint portion, described second-phase modified tone joint portion, described third phase modified tone joint portion may be contained within described flux circuit;
Described first-phase modified tone joint portion adopts described first-phase metamagnetic materials to make, and described second-phase modified tone joint portion adopts described second-phase metamagnetic materials to make, and described third phase modified tone joint portion adopts described third phase metamagnetic materials to make;
The Curie temperature of described body magnetic material is more than the Curie temperature of described first-phase metamagnetic materials, the Curie temperature of described first-phase metamagnetic materials is more than the Curie temperature of described second-phase metamagnetic materials, and the Curie temperature of described first-phase metamagnetic materials is more than the Curie temperature of described third phase metamagnetic materials;
Wherein, the Curie temperature of described first-phase metamagnetic materials is default first-phase temperature threshold value; The Curie temperature of described second-phase metamagnetic materials is default second-phase temperature threshold value; The Curie temperature of described third phase metamagnetic materials is default third phase temperature threshold value.
4. variable inductor according to claim 3, it is characterised in that the Curie temperature of described body magnetic material is more than 160 degrees Celsius;
Described first-phase temperature threshold value is 125 ± 5 degrees Celsius; Described second-phase temperature threshold value is 105 ± 5 degrees Celsius; Described third phase temperature threshold value is 85 ± 5 degrees Celsius;
Corresponding, the Curie temperature of described first-phase metamagnetic materials is 125 ± 5 degrees Celsius; The Curie temperature of described second-phase metamagnetic materials is 105 ± 5 degrees Celsius; The Curie temperature of described third phase metamagnetic materials is 85 ± 5 degrees Celsius.
5. variable inductor according to claim 2, it is characterised in that described first magnetic core and/or described second magnetic core are E-type magnetic core;
Described E-type magnetic core includes support member; The middle part of described support member is provided with coiling center pillar; Described coil is wound on described coiling center pillar;
The both ends of described support member are additionally provided with the first side column and the second side column; Described first side column and described second side column are symmetrically disposed on described coiling center pillar both sides.
6. variable inductor according to claim 5, it is characterised in that described coiling center pillar includes at least one described phase transformation adjustment portion.
7. variable inductor according to claim 5, it is characterised in that described first side column and/or the second side column include at least one described phase transformation adjustment portion.
8. variable inductor according to claim 5, it is characterised in that described support member includes at least one described phase transformation adjustment portion.
9. variable inductor according to claim 5, it is characterised in that described first magnetic core and described second magnetic core are E-type magnetic core;
Described coil is wound on the coiling center pillar of described first magnetic core and the coiling center pillar of described second magnetic core;
Described first magnetic core and described second magnetic core docking form the flux circuit of variable inductor.
10. variable inductor according to claim 2, it is characterised in that described phase metamagnetic materials is nickel-zinc ferrite or manganese-zinc ferrite.
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| CN108376972A (en) * | 2018-04-26 | 2018-08-07 | 广东美的厨房电器制造有限公司 | Controllable impedance and household electrical appliance |
| CN111243835A (en) * | 2018-11-29 | 2020-06-05 | 施耐德电器工业公司 | Current transformer, and protection device and electrical circuit breaker comprising such a transformer |
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| CN201773663U (en) * | 2010-04-16 | 2011-03-23 | 深圳市佳士科技股份有限公司 | Converter inductor in soft switch of inverter welding machine |
| CN102543373A (en) * | 2010-12-08 | 2012-07-04 | 埃普科斯股份有限公司 | Inductive component with improved core properties |
| CN105074839A (en) * | 2012-12-04 | 2015-11-18 | 胜美达集团有限公司 | Magnetic cores and method for producing same |
| CN103077804A (en) * | 2013-01-31 | 2013-05-01 | 中国电力科学研究院 | Multilevel orthogonal magnetic saturation-type controlled reactor |
| CN203165616U (en) * | 2013-03-18 | 2013-08-28 | 蒋科明 | Adjustable inductor |
| CN205428624U (en) * | 2016-03-15 | 2016-08-03 | 东莞铭普光磁股份有限公司 | Adjustable inducer |
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| CN108376972A (en) * | 2018-04-26 | 2018-08-07 | 广东美的厨房电器制造有限公司 | Controllable impedance and household electrical appliance |
| CN111243835A (en) * | 2018-11-29 | 2020-06-05 | 施耐德电器工业公司 | Current transformer, and protection device and electrical circuit breaker comprising such a transformer |
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