CN202839232U - Magnetic core and magnetic element - Google Patents
Magnetic core and magnetic element Download PDFInfo
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- CN202839232U CN202839232U CN201220476061.1U CN201220476061U CN202839232U CN 202839232 U CN202839232 U CN 202839232U CN 201220476061 U CN201220476061 U CN 201220476061U CN 202839232 U CN202839232 U CN 202839232U
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Abstract
The utility model relates to a magnetic core and a magnetic element. The magnetic core comprises a winding part and a non-winding part. The winding part and the non-winding part constitute a magnetic circuit and are respectively made of different permeability magnetic materials. The saturation flux density of the magnetic core constituting the winding part is larger than the saturation flux density of the permeability magnetic materials constituting the non-winding part, or the magnetic core material loss of the permeability magnetic materials constituting the winding part is lower than the magnetic core material loss of the permeability magnetic materials constituting the non-winding part. According to the magnetic core, the winding part is made of the permeability magnetic materials which is larger in saturation flux density or lower in magnetic core material loss so that the non-winding part is enabled to be made of the permeability magnetic materials which are lower in cost, thus, performance characteristics of different permeability magnetic materials are sufficiently utilized to reduce required amount of wound wire of windings, and reduce utilization amount of expensive materials, and therefore cost of the magnetic core is reduced and cost performance of the magnetic core and the corresponding magnetic element is improved.
Description
Technical field
The utility model relates to electronic technology field, more particularly, relates to a kind of magnetic core and magnetic element.
Background technology
In traditional magnetic element, comprise transformer, inductance or reactor etc., the general permeability magnetic material that in same magnetic circuit, uses a kind of material, the permeability magnetic material that adopts comprises silicon steel sheet, amorphous, ferrite or powder core etc.The characteristic such as the permeability of different permeability magnetic materials, the loss of magnetic core material, anti-direct current biasing ability and saturation flux density and cost are not identical, and the magnetic element characteristic and the cost that therefore cause adopting different permeability magnetic materials to make are different.
Magnetic element (such as inductance, the transformer etc.) advantage that adopts ferrite to make is: permeability higher (more than the initial permeability Ui=1500), the loss of magnetic core material are low, low price, and because the material characteristic of ferrite itself, can be processed into various combination of shapes and become magnetic circuit, such as EE, PQ type etc.; Shortcoming is: anti-direct current biasing ability, saturation flux density is low.
Magnetic element (such as inductance, the reactor etc.) advantage that adopts silicon steel sheet to make is: permeability high (more than the initial permeability Ui=5000), add the modes such as segmentation air gap with the less number of turn and center pillar, and can accomplish the inductance value that requires; Shortcoming is: because air gap concentrates on several positions of magnetic core center pillar, cause the overall losses of magnetic core larger, the noise of audio range is large, needs reduction work magnetic flux density just can reduce noise.
Adopt the magnetic element that amorphous makes (such as inductance etc.) advantage to be: permeability the highest (more than the Ui=30000), identical number of turn coil can obtain maximum sensibility reciprocal, and adopt the compressing core loss of amorphous thin slice less; Shortcoming is: price.
Magnetic element (such as inductance or the reactor etc.) advantage that adopts metal magnetic powder core to make is: owing to generally being spliced into the magnetic core of large-size with the powder core square bar of smaller size smaller, this structure so that air gap be evenly distributed on the whole magnetic circuit, the overall losses of magnetic core and noise be less all, and anti-direct current biasing ability is strong, and saturation flux density is high; Shortcoming is: permeability lower (effective permeability Ui=10～125), the identical number of turn can only obtain less inductance value.
The utility model content
The technical problems to be solved in the utility model is, for the defects of prior art, provides a kind of magnetic core of high performance-price ratio.
Another purpose of the present utility model is, a kind of magnetic element that adopts above-mentioned magnetic core is provided.
The technical scheme that its technical problem that solves the utility model adopts is:
Construct a kind of magnetic core, comprise the winding portion and the non-winding portion that consist of magnetic circuit, wherein, described winding portion is made by different permeability magnetic materials with described non-winding portion, and the saturation induction density of permeability magnetic material that consists of described winding portion is greater than the saturation induction density of the permeability magnetic material that consists of described non-winding portion; Perhaps, the magnetic core material loss that consists of the permeability magnetic material of described winding portion is lower than the magnetic core material loss of the permeability magnetic material that consists of described non-winding portion.
Magnetic core described in the utility model wherein, consists of the saturation induction density of permeability magnetic material of described winding portion and the product of net sectional area and is approximately equal to the saturation induction density of the permeability magnetic material that consists of described non-winding portion and the product of net sectional area.
Magnetic core described in the utility model, wherein, described winding portion adopts amorphous or silicon steel sheet to make, and described non-winding portion adopts metal magnetic powder core or ferrite to make.
Magnetic core described in the utility model, wherein, described metal magnetic powder core comprises one or more in FeSi, FeSiAl, FeNi, FeSiB or the FeMoNi powder core.
Magnetic core described in the utility model, wherein, described metal magnetic powder core comprises FeSi powder core and FeSiAl powder core; Wherein,
Described non-winding portion comprises upper strata, the lower floor that is made of the FeSiAl powder core, and the intermediate layer that is made of the FeSi powder core.
Magnetic core described in the utility model, wherein, described winding portion adopts the FeSi powder core to make, and described non-winding portion adopts FeSiAl powder core and ferrite to make; Wherein,
Described non-winding portion comprises upper strata, the lower floor that is made of ferrite, and the intermediate layer that is made of the FeSiAl powder core.
Magnetic core described in the utility model, wherein, described winding portion adopts the FeSiAl powder core to make, and one or more in described non-winding portion employing FeSi, FeSiAl, FeNi, FeSiB, FeMoNi powder core or the ferrite are made.
Magnetic core described in the utility model, wherein, described magnetic core is " E " type, and the center pillar of described magnetic core is winding portion, and other of described magnetic core minute yoke is non-winding portion;
Described winding portion adopts ferrite, silicon steel sheet or metal magnetic powder core to make, and ferrite, silicon steel sheet or metal magnetic powder core that described non-winding portion adopts the loss of magnetic core material to be higher than described winding portion are made.
Magnetic core described in the utility model, wherein, described winding portion adopts the PC95 ferrite to make, and described non-winding portion adopts the PC44 ferrite to make.
The utility model also provides a kind of magnetic element, wherein, comprises such as aforementioned each described magnetic core.
The beneficial effects of the utility model are: make respectively winding portion and non-winding portion by adopting non-single permeability magnetic material, wherein adopt saturation induction density permeability magnetic material larger or that the loss of magnetic core material is lower to make the winding portion of magnetic core, so that non-winding portion can adopt lower-cost permeability magnetic material to consist of, can take full advantage of like this characteristic of property of different permeability magnetic materials, reduce the required coiling amount of winding, reduce the use amount of your material, to reduce the cost of magnetic core, improve the cost performance of magnetic core and respective magnetic element.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is single magnetic circuit core structure schematic diagram one of the non-single permeability magnetic material of employing of the utility model preferred embodiment;
Fig. 2 is single magnetic circuit core structure schematic diagram two of the non-single permeability magnetic material of employing of the utility model preferred embodiment;
Fig. 3 is the double magnetic circuit core structure schematic diagram of the non-single permeability magnetic material of employing of the utility model preferred embodiment.
Embodiment
The magnetic core of the utility model preferred embodiment as shown in figures 1 and 3, comprise the winding portion 11 and the non-winding portion 12 that consist of magnetic circuit, winding portion 11 adopts respectively different permeability magnetic materials to make with non-winding portion 12, and the saturation induction density of the permeability magnetic material of formation winding portion 11 is greater than the saturation induction density of the permeability magnetic material that consists of non-winding portion 12; Perhaps, the magnetic core material loss of the permeability magnetic material of formation winding portion 11 is lower than the magnetic core material loss of the permeability magnetic material that consists of non-winding portion 12.Wherein, winding portion 11 adopts respectively different permeability magnetic materials with non-winding portion 12, therefore can adopt lower-cost permeability magnetic material to consist of non-winding portion 12, to take full advantage of the characteristic of property of different permeability magnetic materials, reduce the required coiling amount of winding, reduce the use amount of your material, reduce the cost of magnetic core, improve the cost performance of magnetic core and respective magnetic element.
Preferably, in single magnetic circuit magnetic core, as shown in Figure 1, the saturation induction density of the permeability magnetic material of formation winding portion 11 is greater than the saturation induction density of the permeability magnetic material that consists of non-winding portion 12.After adopting so the larger permeability magnetic material of saturation induction density to make winding portion 11, the winding length of winding shortens with respect to the coiling of the magnetic circuit that adopts single permeability magnetic material to form, can greatly reduce with the wire rod amount, also can reduce simultaneously the permeability magnetic material consumption that consists of winding portion 11, thereby reduce the magnetic core cost.Further, because the larger permeability magnetic material price of saturation induction density is generally higher, such as amorphous etc., therefore can select other relatively cheap magnetic materials to consist of non-winding portion 12, further reduce the magnetic core cost.
Preferably, in the double magnetic circuit magnetic core, as shown in Figure 3, the magnetic core material loss that consists of the permeability magnetic material of winding portion 11 is lower than the magnetic core material loss of the permeability magnetic material that consists of non-winding portion 12.Because in the double magnetic circuit magnetic core, for example in " E " type magnetic core shown in Figure 3, the center pillar 23 parts heat radiation that is used for coiling is difficult, adopts the low permeability magnetic material of magnetic core material loss the working temperature of center pillar 23 can be dropped to minimum, thereby solves the heat dissipation problem of center pillar 23.The non-winding portion 12 of magnetic core then can select low-cost magnetic material to make, thereby reduces the cost of magnetic core.
Particularly, can the permeability magnetic material mixing of various different characteristics be used in same magnetic circuit according to previous embodiment, bring into play separately its advantage, comprise characteristic of property and cost advantage etc., to accomplish that the magnetic material minimum, that cost is high uses the magnetic material minimum, that cost is low and use the moderate magnetic Circuit Design of finishing with the line amount, to reach suitable performance index and higher cost performance.
Wherein, the permeability magnetic material of formation magnetic core includes but not limited to: amorphous, silicon steel sheet, ferrite, metal magnetic powder core etc.Wherein, metal magnetic powder core includes but not limited to: FeSi, FeSiAl, FeNi, FeSiB, FeMoNi etc., or the FeSiAl of different magnetic permeability u, FeNi, FeSiB, FeMoNi etc.; Silicon steel sheet includes but not limited to: FeSi
3.5Or FeSi
6.5Silicon steel sheet etc.
When stating in design the magnetic core that adopts non-single permeability magnetic material formation, preferably follow following principle: consist of the saturation induction density (with " Bs " expression) of the permeability magnetic material of winding portion 11 and the product of net sectional area (with " Ae " expression) and be approximately equal to the saturation induction density of the permeability magnetic material that consists of non-winding portion 12 and the product of net sectional area, to reduce the magnetic flux leakage of magnetic core as far as possible, guarantee the magnetic flux of magnetic core.When the non-single magnetic core material compound mode of specific design, can adopt the Bs Ae value of the Ohm's law calculation combination material magnetic core of magnetic circuit, so that the Bs Ae value of the Bs Ae value of combination material magnetic core and single magnetic material is basic identical.
The magnetic core that describes the non-single magnetic material of employing of the present utility model below by several preferred embodiments in detail consists of, but following examples only for core structure characteristics and the advantage of the non-single magnetic material of the present utility model of explaining, are not limited to the utility model.
Embodiment 1:
As shown in Figure 1, the winding portion 11(of single magnetic circuit magnetic core is namely: two side columns 21) adopt amorphous to make, non-winding portion 12(is namely: upper lower yoke member 22) adopt metal magnetic powder core to make, can utilize like this characteristics of the amorphous permeability is high, loss is little advantage and metal magnetic powder core low price, even air gap, make the magnetic core of high performance-price ratio.Wherein, metal magnetic powder core can be one or more in FeSi, FeSiAl, FeNi, FeSiB or the FeMoNi powder core of identical or different magnetic permeability.The preferred FeSi/FeSiAl of employing powder core makes up in the present embodiment, and the BsAe value approximately equal of the BsAe value of amorphous and FeSi/FeSiAl powder core.
Preferably, as shown in Figure 2, non-winding portion 12 comprises upper strata 221, the lower floor 223 that is made of the FeSiAl powder core, and the intermediate layer 222 that is made of the FeSi powder core.Wherein, amorphous adopts 10*40mm
2Sectional area, Bs are 1.5T; The FeSiAl powder core of upper strata 221 and lower floor 223 adopts 10*40mm altogether
2Sectional area, Bs are 0.80T; Intermediate layer 222FeSi powder core adopts the 4*40mm2 sectional area, and Bs is 1.80T, and by calculating the BsAe product as can be known, amorphous is 1.5*400=600T.mm
2Be 0.80*400+1.8*160=608T.mm after the combination of FeSiAl+FeSi powder core
2Therefore, the non-winding portion 12(of magnetic core namely: BsAe value upper lower yoke member 22) and winding portion 11(namely: BsAe value approximately equal two side columns 21), can reduce the magnetic flux leakage of magnetic core, assurance magnetic flux.
Under same application index (120uH/60A), adopt the non-single magnetic material magnetic core of single amorphous material, single metal magnetic powder core material (FeSi/FeSiAl powder core) and the present embodiment to compare, coiling consumption, magnetic core unit price, magnetic core consumption and the contrast of anti-direct current biasing ability parameter are as shown in table 1 below:
Table 1 unlike material magnetic core parameter comparison 1
As can be known, the magnetic core that forms magnetic circuit with single metal magnetic powder core is compared, and the non-single magnetic material magnetic core of the present embodiment only needs shorter coiling can obtain identical inductance value, can greatly reduce with the wire rod amount; Compare with the magnetic core of single amorphous formation magnetic circuit, the unit price of upper lower yoke member 22 volume units of the non-single magnetic material magnetic core of the present embodiment is more cheap more than 50% than amorphous, greatly reduces the magnetic core cost; Under same direct current biasing, the reservation inductance value of the non-single magnetic material magnetic core of the present embodiment is lower than the magnetic core of single amorphous formation magnetic circuit, is higher than the magnetic core that single metal magnetic powder core forms magnetic circuit far away.And, adopt the magnetic core of single amorphous formation magnetic circuit when inductor design, can have air gap, the non-single magnetic material magnetic core of the present embodiment can accomplish not have air-gap, this is for reducing and stopping the eddy current loss of air-gap leakage field to winding and more have superiority.
Metal magnetic powder core in the present embodiment also can adopt the ferrite of unlike material to substitute, and can make equally the high magnetic core of cost performance.
Embodiment 2:
As shown in Figure 1, the winding portion 11(of single magnetic circuit magnetic core namely: two side columns 21) adopt silicon steel sheet to make, such as FeSi
3.5Or FeSi
6.5Silicon steel sheet, non-winding portion 12(be namely: upper lower yoke member 22) adopt metal magnetic powder core to make, can utilize like this characteristics of the high advantage of silicon steel sheet permeability and metal magnetic powder core low price, even air gap, make the magnetic core of high performance-price ratio.Wherein, metal magnetic powder core can be one or more in FeSi, FeSiAl, FeNi, FeSiB or the FeMoNi powder core of identical or different magnetic permeability.For example, adopt the combination of FeSi/FeSiAl powder core, and the BsAe value approximately equal of the BsAe value of silicon steel sheet and FeSi/FeSiAl powder core.
Preferably, in the present embodiment, as shown in Figure 2, non-winding portion 12 comprises upper strata 221, the lower floor 223 that is made of the FeSiAl powder core, and the intermediate layer 222 that is made of the FeSi powder core.Wherein, amorphous adopts 10*40mm
2Sectional area, Bs are 1.5T; The FeSiAl powder core of upper strata 221 and lower floor 223 adopts 10*40mm altogether
2Sectional area, Bs are 0.80T; Intermediate layer 222FeSi powder core adopts 4*40mm
2Sectional area, Bs are 1.80T, and by calculating the BsAe product as can be known, amorphous is 1.5*400=600T.mm
2Be 0.80*400+1.8*160=608T.mm after the combination of FeSiAl+FeSi powder core
2Therefore, the non-winding portion 12(of magnetic core namely: BsAe value upper lower yoke member 22) and winding portion 11(namely: BsAe value approximately equal two side columns 21), can reduce the magnetic flux leakage of magnetic core, assurance magnetic flux.
The magnetic core that forms magnetic circuit with single metal magnetic powder core is compared, and the non-single magnetic material magnetic core of the present embodiment only needs shorter coiling can obtain identical inductance value, can greatly reduce with the wire rod amount; Compare with the magnetic core of single amorphous formation magnetic circuit, the unit price of upper lower yoke member 22 volume units of the non-single magnetic material magnetic core of the present embodiment is more cheap more than 50% than amorphous, greatly reduces the magnetic core cost; Under same direct current biasing, the reservation inductance value of the non-single magnetic material magnetic core of the present embodiment is lower than the magnetic core of single amorphous formation magnetic circuit, is higher than the magnetic core that single metal magnetic powder core forms magnetic circuit far away.And, adopt the magnetic core of single amorphous formation magnetic circuit when inductor design, can have air gap, the non-single magnetic material magnetic core of the present embodiment can accomplish not have air-gap, this is for reducing and stopping the eddy current loss of air-gap leakage field to winding and more have superiority.
Metal magnetic powder core in the present embodiment also can adopt the ferrite of unlike material to substitute, and can make equally the high magnetic core of cost performance.
Embodiment 3:
As shown in Figure 1, the winding portion 11(of single magnetic circuit magnetic core namely: two side columns 21) adopt the FeSi powder core to make, non-winding portion 12(namely: upper lower yoke member 22) adopt FeSiAl powder core and ferrite combination to make.Wherein, preferably, as shown in Figure 2, non-winding portion 12 comprises upper strata 221, the lower floor 223 that is made of ferrite, and the intermediate layer 222 that is made of the FeSiAl powder core.Can utilize like this characteristics of even air gap and the high magnetic flux density of FeSi powder core, and utilize the low advantage of FeSiAl powder core and ferrite cost, obtain the magnetic core of high performance-price ratio.And the BsAe value approximately equal of the BsAe value of FeSi powder core and FeSiAl powder core/ferrite combination.
In the present embodiment, adopt the non-single magnetic material magnetic core of single FeSi powder core material, FeSi powder core+ferrite material and the present embodiment to compare, line bag temperature and the contrast of magnetic core cost parameter are as shown in table 2 below:
Table 2 unlike material magnetic core parameter comparison 2
| The magnetic core material | Line bag temperature | The magnetic core cost |
| The FeSi powder core | 115℃ | 60 yuan |
| Ferrite+FeSi powder core | 124℃ | 50 yuan |
| Non-single magnetic material combination | 117℃ | 40 yuan |
By upper table 2 as can be known, because winding portion 11 adopts the uniform FeSi powder core of air gap to make, so that winding is not subject to the eddy current effect impact of leakage field, working temperature is lower; Simultaneously, compare with the magnetic core of single material FeSi powder core, the magnetic core cost of the present embodiment approximately hangs down 20%～30%.
In the present embodiment, non-winding portion 12(namely: upper lower yoke member) can also adopt FeSiAl, FeNi, the metal magnetic powder cores such as FeSiB, FeMoNi, the unlike material ferrite of identical or different magnetic permeability to consist of with other combining forms.
Embodiment 4:
As shown in Figure 1, the winding portion 11(of single magnetic circuit magnetic core is namely: two side columns 21) adopt the FeSiAl powder core to make, non-winding portion 12(namely: upper lower yoke member 22) adopt FeSiAl, the FeNi of identical or different magnetic permeability, one or more formations in metal magnetic powder core, the unlike material ferrites such as FeSiB, FeMoNi.Its constituted mode and advantage can with reference to previous embodiment, be not repeated herein.
Embodiment 5:
As shown in Figure 3, magnetic core is " E " type double magnetic circuit magnetic core, and the center pillar 23 of magnetic core is winding portion 11, and other of magnetic core minute yoke 24 is non-winding portion 12.Wherein, winding portion 11 adopts ferrite, silicon steel sheet or metal magnetic powder core to make, and ferrite, silicon steel sheet or metal magnetic powder core that non-winding portion 12 adopts the loss of magnetic core material to be higher than winding portion 11 are made.
Preferably, winding portion 11 adopts the ferrite of PC95 or suitable material to make, and non-winding portion 12 adopts the ferrite of PC44 or suitable material to make.Wherein, the ferrite Bs of PC95 and PC44 or suitable material is suitable.Can utilize so the little characteristics of ferrite loss of PC95 or suitable material, the working temperature of center pillar 23 parts that heat radiation is difficult drops to minimum; And the low-cost advantage of ferrite of utilizing PC44 or suitable material, with the overall cost of magnetic core.
Adopt the non-single magnetic material magnetic core of single PC95 ferrite material, single PC44 ferrite and the present embodiment to compare, center pillar 23 temperature and the contrast of magnetic core cost parameter are as shown in table 2 below:
Table 3 unlike material magnetic core parameter comparison 3
| The magnetic core material | Middle column temperature | The magnetic core cost |
| PC44 | 123℃ | 2.80 unit |
| PC95 | 102℃ | 7.50 unit |
| Non-single magnetic material combination | 102℃ | 3.50 unit |
For " E " type double magnetic circuit magnetic core, the magnetic core assembled scheme in above-described embodiment 5, the center pillar 23 of winding part can also adopt ferrite, the FeSi of other kinds different qualities
3.5Or FeSi
6.5Silicon steel sheet, perhaps adopt FeSiAl, FeNi, the metal magnetic powder cores such as FeSiB, FeMoNi of identical or different magnetic permeability, adopt the FeSi from ferrite, unlike material or the different magnetic permeabilitys of center pillar 23 different qualities on other minute yoke 24
3.5Or FeSi
6.5The metal magnetic powder cores such as the FeSiAl of silicon steel sheet, identical or different magnetic permeability, FeNi, FeSiB, FeMoNi, and they constitute mutually, do not give unnecessary details one by one at this.
In another embodiment of the present utility model, a kind of magnetic element is provided, the magnetic core that it comprises described in aforementioned arbitrary embodiment also comprises skeleton, winding etc.Wherein, the shape of magnetic core can be multiple, such as tank type, RM type, E type, EC, ETD and EER type, PQ type, EP type, annular etc., does not limit at this.As previously mentioned, the magnetic material that consists of magnetic core is non unitary material, and the permeability magnetic material that namely consists of winding portion 11 and non-winding portion 12 comprises at least two kinds.Can take full advantage of like this advantage of different permeability magnetic materials, adopt lower-cost permeability magnetic material to consist of non-winding portion 12, reduce the required coiling amount of winding, reduce the use amount of your material, to reduce the cost of magnetic core, improve the cost performance of magnetic core and respective magnetic element.Form and with reference to aforementioned each embodiment and accompanying drawing 1 and Fig. 3, to be not repeated herein about the magnetic core material.
Magnetic element in the present embodiment includes but not limited to transformer, inductance or reactor etc.Adopt in above-described embodiment 1 inductor that the magnetic core of amorphous+metal magnetic powder core composite forms as example, its inductor with single amorphous material magnetic core composition is compared test, test result is as shown in table 4 below:
The single material of table 4 contrasts with the inductor test result that combination material magnetic core consists of
| Single material magnetic circuit inductor (A example) | Combination material magnetic circuit inductor (B example) |
| L (μ H) 28 circles | L (μ H) 28 circles |
| 100kHz，1V，60A | 100kHz，1V，60A |
| 142uH | 125uH |
Can find out from above-mentioned table 4, in the coil equal turn numbers, and under the condition that all is equal to of frequency, voltage, electric current, sensibility reciprocal after the B example is DC stacked is 125uH, be slightly less than the 142uH of A example, but also within the performance index claimed range, and the A example is suitable with the working temperature of B example.And B example price is routine more cheap more than 20% than A, has greater advantage at cost, so the inductor cost performance that the magnetic core of amorphous in the B example+metal magnetic powder core composite forms is higher.
In sum, the utility model is by adopting non-single permeability magnetic material to make respectively winding portion 11 and non-winding portion 12, wherein adopt saturation induction density permeability magnetic material larger or that the loss of magnetic core material is lower to make the winding portion 11 of magnetic core, so that non-winding portion 12 can adopt lower-cost permeability magnetic material to consist of, can take full advantage of like this characteristic of property of different permeability magnetic materials, reduce the required coiling amount of winding, reduce the use amount of your material, to reduce the cost of magnetic core, improve the cost performance of magnetic core and respective magnetic element.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of the utility model claims.
Claims (10)
1. magnetic core, comprise the winding portion and the non-winding portion that consist of magnetic circuit, it is characterized in that, described winding portion is made by different permeability magnetic materials respectively with described non-winding portion, and the saturation induction density of permeability magnetic material that consists of described winding portion is greater than the saturation induction density of the permeability magnetic material that consists of described non-winding portion; Perhaps, the magnetic core material loss that consists of the permeability magnetic material of described winding portion is lower than the magnetic core material loss of the permeability magnetic material that consists of described non-winding portion.
2. magnetic core according to claim 1, it is characterized in that, consist of the saturation induction density of permeability magnetic material of described winding portion and the product of net sectional area and be approximately equal to the saturation induction density of the permeability magnetic material that consists of described non-winding portion and the product of net sectional area.
3. magnetic core according to claim 1 and 2 is characterized in that, described winding portion adopts amorphous or silicon steel sheet to make, and described non-winding portion adopts metal magnetic powder core or ferrite to make.
4. magnetic core according to claim 3 is characterized in that, described metal magnetic powder core comprises one or more in FeSi, FeSiAl, FeNi, FeSiB or the FeMoNi powder core.
5. magnetic core according to claim 4 is characterized in that, described metal magnetic powder core comprises FeSi powder core and FeSiAl powder core; Wherein,
Described non-winding portion comprises upper strata, the lower floor that is made of the FeSiAl powder core, and the intermediate layer that is made of the FeSi powder core.
6. magnetic core according to claim 1 and 2 is characterized in that, described winding portion adopts the FeSi powder core to make, and described non-winding portion adopts FeSiAl powder core and ferrite to make; Wherein,
Described non-winding portion comprises upper strata, the lower floor that is made of ferrite, and the intermediate layer that is made of the FeSiAl powder core.
7. magnetic core according to claim 1 and 2 is characterized in that, described winding portion adopts the FeSiAl powder core to make, and one or more in described non-winding portion employing FeSi, FeSiAl, FeNi, FeSiB, FeMoNi powder core or the ferrite are made.
8. magnetic core according to claim 1 and 2 is characterized in that, described magnetic core is " E " type, and the center pillar of described magnetic core is winding portion, and other of described magnetic core minute yoke is non-winding portion;
Described winding portion adopts ferrite, silicon steel sheet or metal magnetic powder core to make, and ferrite, silicon steel sheet or metal magnetic powder core that described non-winding portion adopts the loss of magnetic core material to be higher than described winding portion are made.
9. magnetic core according to claim 8 is characterized in that, described winding portion adopts the PC95 ferrite to make, and described non-winding portion adopts the PC44 ferrite to make.
10. a magnetic element is characterized in that, comprises such as each described magnetic core among the claim 1-9.
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| CN104112564A (en) * | 2013-04-19 | 2014-10-22 | 台达电子工业股份有限公司 | Nonlinear inductor |
| CN104779037A (en) * | 2014-01-09 | 2015-07-15 | 台达电子企业管理（上海）有限公司 | Magnetic core structure and reactor |
| CN105097222A (en) * | 2015-07-22 | 2015-11-25 | 上海正泰电源系统有限公司 | Magnetic coupling inductor of interleaving parallel converter and magnetic core |
| CN106205967A (en) * | 2016-06-21 | 2016-12-07 | 广东电网有限责任公司电力科学研究院 | A kind of core construction, saturation type current limiter and saturable reactor |
| CN106653325A (en) * | 2016-12-09 | 2017-05-10 | 徐超 | Induction equipment |
| CN106950515A (en) * | 2015-11-02 | 2017-07-14 | Tdk株式会社 | Magnetic Sensor and the current sensor for possessing it |
| CN107924748A (en) * | 2015-08-24 | 2018-04-17 | 株式会社东金 | Coil component |
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| CN112532052A (en) * | 2019-09-18 | 2021-03-19 | 台达电子工业股份有限公司 | Power conversion system and magnetic element thereof |
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2012
- 2012-09-18 CN CN201220476061.1U patent/CN202839232U/en not_active Expired - Lifetime
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