CN104112564A - Nonlinear inductor - Google Patents
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- CN104112564A CN104112564A CN201310137937.9A CN201310137937A CN104112564A CN 104112564 A CN104112564 A CN 104112564A CN 201310137937 A CN201310137937 A CN 201310137937A CN 104112564 A CN104112564 A CN 104112564A
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Abstract
The invention discloses a nonlinear inductor comprising a first magnetic core, a second magnetic core, a third magnetic core, a fourth magnetic core, a fifth magnetic core and a coil unit. The second magnetic core and the first magnetic core are arranged in parallel. The third magnetic core, the fourth magnetic core and the fifth magnetic core are all perpendicularly disposed between the first magnetic core and the second magnetic core. An induction flux, passing through magnetic resistance of the fourth core, another induction influx different from the induction flux passes the magnetic resistance of the fifth magnetic core.
Description
Technical field
The invention relates to a kind of inductance, and particularly relevant for a kind of nonlinear inductance with one group of asymmetric magnetic resistance.
Background technology
Adopt the electric system of transducer drive, the signal owing to existing high frequency to switch on the circuit on frequency converter and motor, has produced unnecessary electromagnetic interference, has reduced the power factor (PF) of frequency converter integral body, also the load of drive end has been produced to harmonic distortion.
The caused total harmonic distortion of frequency convertor system when low current operates is conventionally larger, may be to system when harmonic distortion is excessive in other equipment usefulness that causes damage or turn round decline.In order to solve the problem of harmonic distortion, the upper nonlinear inductance of can connecting with frequency converter of general application is to suppress harmonic distortion.
Generally speaking, the inductance that use sense value is larger can reduce harmonic distortion more significantly, but excessive inductance also can cause and at frequency converter two ends, produce pressure drop under the operating environment of high electric current, therefore can complete the high sense value of low current with nonlinear inductance in common application, the characteristic of the low sense value of high electric current, to meet separately needed inductance sense value under the operating environment of low current or high electric current.
Yet the existing way that realizes nonlinear inductance utilizes the change of shape of air gap to make nonlinear inductance often, and on making, need special die sinking to make special magnetic core to reach, therefore cause unnecessary extra cost expenditure.
Summary of the invention
The object of the present invention is to provide a kind of nonlinear inductance, in order to solve the above problems or other problems.One mode of content of the present invention is that a kind of nonlinear inductance is being provided, and adjusts mode, to reach sense value adjustment required in various application by simplified structure and multiple elasticity.
One mode of this disclosure is about a kind of nonlinear inductance, wherein comprises the first magnetic core, the second magnetic core, the 3rd magnetic core, the 4th magnetic core, the 5th magnetic core and coil unit.The second magnetic core and the first magnetic core are arranged in parallel.The 3rd magnetic core, the 4th magnetic core and the 5th magnetic core all vertically arrange between the first magnetic core and the second magnetic core.Aforesaid the 4th magnetic core and the 5th magnetic core configured in parallel are in the both sides of the 3rd magnetic core.Coil unit is wound around the 3rd magnetic core, and when direct current can form induced flux during by coil unit, this induced flux is different from induced flux by the second magnetic resistance of the 5th magnetic core by the first magnetic resistance of the 4th magnetic core.
According to one embodiment of the invention, between aforesaid the 4th magnetic core and the first magnetic core and between the 4th magnetic core and the second magnetic core, there is separately one first air gap, and there is separately an interstice between the 5th magnetic core and the first magnetic core and between the 5th magnetic core and the second magnetic core, wherein the first above-mentioned air gap and interstice width are different, form by this first different magnetic resistance and the second magnetic resistance.
Between aforesaid the 3rd magnetic core and the first magnetic core and between the 3rd magnetic core and the second magnetic core, have separately one the 3rd air gap, wherein the first above-mentioned air gap is greater than the 3rd air gap, and the 3rd air gap is greater than interstice.
According to another embodiment of the present invention, between aforesaid the 4th magnetic core and the second magnetic core, there is the first air gap, and between the 5th magnetic core and the second magnetic core, have interstice, wherein the first air gap and interstice width are different, form by this first different magnetic resistance and the second magnetic resistance.
Aforesaid the 3rd magnetic core, the 4th magnetic core and the 5th magnetic core are all connected directly to the first magnetic core, and between the 3rd magnetic core and the second magnetic core, have one the 3rd air gap, and wherein the first air gap is greater than the 3rd air gap, and the 3rd air gap is greater than interstice.
In aforesaid each embodiment, wherein a sectional area of the 4th magnetic core can be different from a sectional area of the 5th magnetic core, forms by this first different magnetic resistance and the second magnetic resistance.
According to the present invention another embodiment again, wherein aforementioned the 3rd magnetic core is paramagnetic material, and aforesaid the first magnetic core, the second magnetic core, the 4th magnetic core and the 5th magnetic core are non-paramagnetic material.
In sum, by application the above embodiments, nonlinear inductance of the present invention reduces by the component structure of simplifying the cost of making upper extra die sinking, and sense value has multiple elasticity to adjust mode, and then reaches the specification demands in various application.
Accompanying drawing explanation
For above and other object of the present invention, feature, advantage and embodiment can be become apparent, appended graphic being described as follows:
Fig. 1 is for illustrating a kind of schematic diagram of nonlinear inductance according to one embodiment of the invention;
Fig. 2 is the schematic diagram according to the configuration of the nonlinear inductance in Fig. 1 in one embodiment of the invention;
Fig. 3 is equivalent inductance value and the current relationship schematic diagram of the nonlinear inductance in Fig. 2;
Fig. 4 is the schematic diagram according to the corresponding equivalent magnetic circuit modeling of nonlinear inductance in Fig. 2;
Fig. 5 A is for illustrating the schematic diagram of another configuration of the nonlinear inductance in Fig. 1 according to further embodiment of this invention;
Fig. 5 B is equivalent inductance value and the current relationship schematic diagram of the nonlinear inductance in Fig. 5 A;
Fig. 6 A is for illustrating the schematic diagram of another configuration of the nonlinear inductance in Fig. 1 according to another embodiment of the present invention;
Fig. 6 B is equivalent inductance value and the current relationship schematic diagram of the nonlinear inductance in Fig. 6 A;
Fig. 7 A is for illustrating the schematic diagram of another configuration of the nonlinear inductance in Fig. 1 according to further embodiment of this invention; And
Fig. 7 B is equivalent inductance value and the current relationship schematic diagram of the nonlinear inductance in Fig. 7 A.
Wherein, description of reference numerals is as follows:
100,200,500,600,700: nonlinear inductance
110,210,510,610,710: the first magnetic cores
120,220,520,620,720: the second magnetic cores
130,230,530,630,730: the three magnetic cores
140,240,540,640,740: the four magnetic cores
150,250,550,650,750: the five magnetic cores
160,260,560,660,760: coil unit
300,302,570,572,670,770: equivalent sense value curve
400: magnetic circuit model
Embodiment
Below for embodiment, coordinate appended graphic elaborating, but the scope that the embodiment providing is not contained in order to limit the present invention, and structure behaviour's description is non-in order to limit the order of its execution, any structure being reconfigured by element, the device with impartial effect that produces, is all the scope that the present invention is contained.In addition, graphic only for the purpose of description, according to life size, do not map.For making to be convenient to understand, in following explanation, similar elements illustrates the symbology with identical.
About " approximately " used herein, " approximately " be generally often referred to " roughly " error of numerical value or scope in 20 percent, be preferably in 10, be in 5 percent more preferably.Wen Zhongruo is without clearly stating, and its mentioned numerical value is all regarded as approximation, for example can be as " approximately ", " approximately " or " roughly " represented error or scope, or other approximations.
About " first " used herein, " second " ... Deng, the not special meaning of censuring order or cis-position, also non-in order to limit the present invention, it is only used to element or operation that difference is described with constructed term.
Fig. 1 illustrates a kind of schematic diagram of nonlinear inductance according to one embodiment of the invention.As shown in Figure 1, nonlinear inductance 100 comprises the first magnetic core 110, the second magnetic core 120, the 3rd magnetic core 130, the 4th magnetic core 140, the 5th magnetic core 150 and coil unit 160.Wherein the second magnetic core 120 and the first magnetic core 110 are arranged in parallel, and the 3rd magnetic core 130, the 4th magnetic core 140, the 5th magnetic core 150 be all vertically set between the first magnetic core 110 and the second magnetic core 120, and the 4th magnetic core 140 and the 5th magnetic core 150 configured in parallel are in the both sides of the 3rd magnetic core 130.Coil unit 160 can be the coil with a plurality of circles, coil unit is being wound around the 3rd magnetic core 130, when direct current can produce corresponding induced flux during by coil unit 160, wherein induced flux is different from induced flux by the equivalent magnetic resistance (hereinafter to be referred as the second magnetic resistance) of the 5th magnetic core 150 by the equivalent magnetic resistance (hereinafter to be referred as the first magnetic resistance) of the 4th magnetic core 140.Because the second magnetic resistance of the whole equivalent inductance value of nonlinear inductance 100 and the first magnetic resistance of the 4th magnetic core 140 and the 5th magnetic core 150 is relevant, therefore, by adjusting first and second magnetic resistance, just can complete the sense value that aforesaid elasticity is adjusted nonlinear inductance.
Below by describing different embodiment in content of the present invention, to complete above-mentioned the first different magnetic resistance and the second magnetic resistance.Please refer to Fig. 2, Fig. 2 illustrates the schematic diagram of the configuration of the nonlinear inductance in Fig. 1 according to one embodiment of the invention, and the element of non-electrical inductance 200 all corresponds respectively to the element shown in Fig. 1 in Fig. 2, it should be noted that between the 4th magnetic core 240 in Fig. 2 and the first magnetic core 210 and have separately the first air gap g between the 4th magnetic core 240 and the second magnetic core 220
1, and there is separately interstice g-between the 5th magnetic core 250 and the first magnetic core 210 and between the 5th magnetic core 250 and the second magnetic core 220
2, the first air gap g wherein
1with interstice g
2width different, wherein the induced flux by the 4th magnetic core 240 must be crossed over the first air gap g
1, by the induced flux of the 5th magnetic core 250, must cross over the different interstice g of width
2, on the 4th magnetic core 240 and the 5th magnetic core 250, form the first different magnetic resistance and the second magnetic resistance by this.
In addition, as shown in Figure 2, between the 3rd magnetic core 230 and the first magnetic core 210 and between the 3rd magnetic core 230 and the second magnetic core 220, there is separately the 3rd air gap g
3.
In one embodiment, the first above-mentioned air gap g
1width be greater than the 3rd air gap g
3width, be more greater than interstice g
2width, for example, the first air gap g
1width be about 0.9 millimeter (mm), interstice g
2width be about 0.225mm and the 3rd air gap g
3width be about 0.45mm, corresponding equivalent inductance value and current relationship figure block curve 300 as shown in Figure 3, the dashed curve 302 that wherein contrasts use is equivalent inductance value when the first magnetic resistance is identical with the second magnetic resistance in the nonlinear inductance 100 shown in Fig. 1 and the relation curve of electric current.In comparison, air gap by two different in width produces the first different magnetic resistance and the nonlinear inductance 200 of the second magnetic resistance, when operating, can improve low current equivalent sense value (being about 5.78mH), and under high current practice, also can there is larger anti-saturation magnetic flux, allow nonlinear inductance 200 can be applied in larger operating current scope.
In addition, we can utilize equivalent magnetic circuit modeling to carry out the nonlinear inductance 200 shown in analysis chart 2.Please refer to Fig. 4, Fig. 4 illustrates the schematic diagram of corresponding equivalent magnetic circuit modeling according to the nonlinear inductance 200 in Fig. 2.Magnetomotive force NI in Fig. 4 corresponds to the N circle coil in the coil unit in Fig. 2, the size of current I flowing through with it, and R wherein
g1, R
g2and R
g3-be respectively the first air gap g in Fig. 2
1, interstice g
2and the 3rd air gap g
3corresponding equivalent magnetic resistance.We can learn from equivalent magnetic circuit modeling 400 the equivalent magnetic resistance R of nonlinear inductance 200
total=2R
g3+ 2 (R
g1∥ R
g2), because the width of air gap and the size of magnetic resistance are positive correlation, with the example of Fig. 2, the first air gap g
1width be greater than interstice g
2width, and interstice g
2width be greater than the 3rd air gap g
3width, the pass of corresponding equivalent magnetic resistance is R
g1> R
g2> R
g3.Due to the first air gap g
1equivalent magnetic resistance R
g1larger, the magnetic flux major part producing on the 3rd magnetic core 230 and coil unit 260 under low current operation is via R
g2transmit, that is the magnetic flux density on the 5th magnetic core 250 is higher, now the equivalent magnetic resistance of nonlinear inductance 200 can be modified to R
total≒ 2R
g3+ 2R
g2.In other words, when low current operates, the sense value of nonlinear inductance 200 and interstice g
2equivalent magnetic resistance R
g2--comparatively relevant.
Moreover when nonlinear inductance 200 operates in the operating environment of high electric current, the magnetic flux that the 5th 250 of magnetic cores can receive approaches to saturation, corresponding equivalent magnetic resistance R
g2also increase gradually, the magnetic flux producing on the 3rd magnetic core 230 and coil unit 260 starts via R
g1transmit, that is the magnetic flux density of the 4th magnetic core 240 starts to increase, now 200 corresponding equivalent magnetic resistances of nonlinear inductance can be modified to R
total≒ 2R
g3+ 2R
g1.In brief, when high current practice, the sense value of nonlinear inductance 200 and the first air gap g
1equivalent magnetic resistance R
g1comparatively relevant.
Moreover, generally speaking, the equivalent magnetic resistance of inductance element is larger, associative perception value is less, and the width of air gap becomes just comparing with magnetic resistance, therefore, when the width of air gap larger, the equivalence sense value of inductance element is just less, therefore can, by adjusting the width of the first air gap g1 and interstice g2, form above-mentioned different magnetic resistance R
g1with magnetic resistance R
g2configuration, reach by this characteristic that can have different equivalence sense values under different electric current environment.
Fig. 5 A illustrates the schematic diagram of another configuration of the nonlinear inductance in Fig. 1 according to further embodiment of this invention, and in Fig. 5 A, the element of nonlinear inductance 500 all corresponds respectively to the element shown in nonlinear inductance 100 in Fig. 1.As shown in Figure 5A, between the 4th magnetic core 540 and the second magnetic core 520, there is the first air gap g in the present embodiment
1, between the 5th magnetic core 550 and this second magnetic core 520, there is interstice g
2, and the first air gap g
1with interstice g
2width is different, forms by this first different magnetic resistance and the second magnetic resistance.And the 3rd magnetic core 530, the 4th magnetic core 540 and the 5th magnetic core 550 are all connected directly to the first magnetic core 510 in the present embodiment, the magnetic element that the first magnetic core 510, the 3rd magnetic core 530, the 4th magnetic core 540 and the 5th magnetic core 550 are formed in one by this, this magnetic element (the first magnetic core 510, the 3rd magnetic core 530, the 4th magnetic core 540 and the 5th magnetic core 550) roughly forms E-I type magnetic core with the second magnetic core 520.Between the 3rd magnetic core 530 and this second magnetic core 520, there is one the 3rd air gap g
3, the first air gap g wherein
1be greater than the 3rd air gap g
3, be more greater than interstice g
2.
For example, the first air gap g
1width be about 1.35mm, interstice g
2width be about 0.45mm and the 3rd air gap g
3width be about 0.9mm.Corresponding equivalent inductance value and current relationship figure block curve 570 as shown in Figure 5 B now, the dashed curve 572 that wherein contrasts use is equivalence sense value curve when each width of air gap is all identical (being about 0.9mm) in the nonlinear inductance 500 shown in Fig. 5 A.From the block curve 570 of Fig. 5 B, can learn by the adjustment of different width of air gaps, in the structure of E-I type magnetic core, also can reach the characteristic of the high sense value of low current, the low sense value of high electric current.
In addition, because the magnetic resistance of each magnetic core is inversely proportional to the sectional area of corresponding magnetic core, in the situation that air gap is different, we more can adjust by adjusting the sectional area of each magnetic core the size of magnetic resistance further.For example, please refer to Fig. 6 A, Fig. 6 A is the schematic diagram that another embodiment of the present invention illustrates another configuration of the nonlinear inductance in Fig. 2, and in Fig. 6 A the element of nonlinear inductance 600 all separately corresponding to the element shown in nonlinear inductance in Fig. 2 200.For example, as shown in Figure 6A, in the situation that there is different width of air gaps, by the width D of a sectional area of the 4th magnetic core 640
1be configured to be different from the width D of a sectional area of the 5th magnetic core 650
2, produce by this larger magnetic resistance change in resistance, to obtain different sense value adjusting ranges.
For example, the first air gap g as discussed previously
1width be about 0.9mm, interstice g
2width be about 0.225mm and the 3rd air gap g
3width be about the width D of the sectional area of 0.45mm and the 4th magnetic core 640
1be about 22.2mm, and the width D of the sectional area of the 5th magnetic core 650
2be about 33.3mm.Corresponding equivalent inductance value and current relationship figure block curve 670 as shown in Figure 6B now, the sense value in the dashed curve 302 of aforementioned contrast use under low current is about 4mH, and in block curve 670 in the present embodiment, the sense value under low current is about 6.43mH.In sum, the sectional area of simultaneously adjusting each width of air gap and magnetic core can reach larger sense value to be changed.
Or, the nonlinear inductance 500 of take again in Fig. 5 A and Fig. 5 B is example, at the 3rd magnetic core 530, the 4th magnetic core 540 and the 5th magnetic core 550, be all connected directly to the first magnetic core 510, and exist in the situation of the first air gap between the 3rd magnetic core 530 and this second magnetic core 520, also can, by adjusting the width of the 4th magnetic core 540 sectional areas and the width of the 5th magnetic core 550 sectional areas forms different the first larger magnetic resistance and the second magnetic resistance, also can obtain different sense value adjusting ranges.
Moreover, as the equivalent magnetic circuit modeling analysis of earlier figures 4 can be learnt, when electric current flow through the 3rd magnetic core 230 and the magnetic flux that coil unit 260 produces, can jointly use with the 4th magnetic core 240 and the 5th magnetic core 250.Therefore,, in order to improve further the magnetic flux utilization rate of overall inductance, we can improve the saturation flux amount of the 3rd magnetic core.
For example, please refer to Fig. 7 A, Fig. 7 A illustrates the schematic diagram of another configuration of the nonlinear inductance in Fig. 1 according to further embodiment of this invention, and in Fig. 7 A the element of nonlinear inductance 700 all separately corresponding to the element shown in nonlinear inductance in Fig. 1 100.As shown in Figure 7 A, wherein the 3rd magnetic core 730 is paramagnetic material, and the first magnetic core 710, the second magnetic core 720, the 4th magnetic core 740 and the 5th magnetic core 750 are non-paramagnetic material.For example, when the 3rd magnetic core 730 can be paramagnetism silicon steel sheet, and the first magnetic core 710, the second magnetic core 720, the 4th magnetic core 740 and the 5th magnetic core 750 are can non-paramagnetism silicon steel sheet, and the first air gap g
1width be about 0.9mm, interstice g
2width be about 0.225mm and the 3rd air gap g
3width be about 0.45mm, corresponding equivalent inductance value and current relationship figure block curve 770 as shown in Figure 7 B now, compared to the dashed curve 302 of aforementioned contrast use, by above-mentioned configuration, can promote the saturation flux amount of the 3rd magnetic core 730, also reach different inductance sense value adjustment simultaneously.
Be noted that, in each above-mentioned embodiment, between each magnetic core, can complete above-mentioned various configuration modes by an EXS mode, for example, between each magnetic core, can each magnetic core be configured according to different execution modes by a support, to save extra die sinking, manufacture the cost of special air gap.
The mode of using in above-mentioned various embodiment, can carry out Integrated using further according to the required specification of application, for example adjusts the sectional area of each magnetic core and the width of each air gap, to reach the sense value adjustment of different range simultaneously.
By above-mentioned various embodiments, can learn that the nonlinear inductance shown in content of the present invention has multiple elasticity to adjust the mode of inductance sense value, and additionally die sinking is made special air gap and just can be reached the high sense value of low current, the characteristic of the low sense value of high electric current.
Although the present invention discloses as above with execution mode; so it is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when being used for a variety of modifications and variations, so protection scope of the present invention is when being as the criterion depending on the appended claim scope of the applying for a patent person of defining.
Claims (10)
1. a nonlinear inductance, comprises:
One first magnetic core;
One second magnetic core, is arranged in parallel with this first magnetic core;
One the 3rd magnetic core, vertically arranges between this first magnetic core and this second magnetic core;
One the 4th magnetic core, vertically arranges between this first magnetic core and this second magnetic core;
One the 5th magnetic core, vertically arranges between this first magnetic core and this second magnetic core, and the 4th magnetic core and the 5th magnetic core configured in parallel are in the both sides of the 3rd magnetic core; And
One coil unit, is wound around the 3rd magnetic core, and a direct current forms an induced flux by this coil unit, and this induced flux is different from this induced flux by one second magnetic resistance of the 5th magnetic core by one first magnetic resistance of the 4th magnetic core.
2. nonlinear inductance as claimed in claim 1, wherein between the 4th magnetic core and this first magnetic core and between the 4th magnetic core and this second magnetic core, there is separately one first air gap, between the 5th magnetic core and this first magnetic core and between the 5th magnetic core and this second magnetic core, there is separately an interstice, this first air gap and this interstice width are different, form by this this different first magnetic resistance and this second magnetic resistance.
3. nonlinear inductance as claimed in claim 2, wherein between the 3rd magnetic core and this first magnetic core and between the 3rd magnetic core and this second magnetic core, there is separately one the 3rd air gap, wherein this first air gap is greater than the 3rd air gap, and the 3rd air gap is greater than this interstice.
4. nonlinear inductance as claimed in claim 1, wherein between the 4th magnetic core and this second magnetic core, there is one first air gap, between the 5th magnetic core and this second magnetic core, there is an interstice, this first air gap and this interstice width are different, form by this this different first magnetic resistance and this second magnetic resistance.
5. nonlinear inductance as claimed in claim 4, wherein the 3rd magnetic core, the 4th magnetic core and the 5th magnetic core are all connected directly to this first magnetic core, between the 3rd magnetic core and this second magnetic core, there is one the 3rd air gap, wherein this first air gap is greater than the 3rd air gap, and the 3rd air gap is greater than this interstice.
6. the nonlinear inductance as described in claim 2,3,4 or 5, wherein a sectional area of the 4th magnetic core is different from a sectional area of the 5th magnetic core, forms by this this different first magnetic resistance and this second magnetic resistance.
7. nonlinear inductance as claimed in claim 1, wherein the 3rd magnetic core is a paramagnetic material, and this first magnetic core, this second magnetic core, the 4th magnetic core and the 5th magnetic core are a non-paramagnetic material.
8. a nonlinear inductance, comprises:
One first magnetic core;
One second magnetic core, is arranged in parallel with this first magnetic core;
One the 3rd magnetic core, vertically arranges between this first magnetic core and this second magnetic core;
One coil unit, is wound around the 3rd magnetic core;
One the 4th magnetic core, vertically arranges between this first magnetic core and this second magnetic core;
One the 5th magnetic core, vertically arranges between this first magnetic core and this second magnetic core, and the 4th magnetic core and the 5th magnetic core configured in parallel be in the both sides of the 3rd magnetic core,
Wherein, between the 4th magnetic core and this first magnetic core and between the 4th magnetic core and this second magnetic core, there is separately one first air gap, between the 5th magnetic core and this first magnetic core and between the 5th magnetic core and this second magnetic core, there is separately an interstice, between the 3rd magnetic core and this first magnetic core and between the 3rd magnetic core and this second magnetic core, there is separately one the 3rd air gap, this first air gap is greater than the 3rd air gap, and the 3rd air gap is greater than this interstice.
9. a nonlinear inductance, comprises:
One first magnetic core;
One second magnetic core, is arranged in parallel with this first magnetic core;
One the 3rd magnetic core, vertically arranges between this first magnetic core and this second magnetic core;
One coil unit, is wound around the 3rd magnetic core;
One the 4th magnetic core, vertically arranges between this first magnetic core and this second magnetic core;
One the 5th magnetic core, vertically arranges between this first magnetic core and this second magnetic core, and the 4th magnetic core and the 5th magnetic core configured in parallel be in the both sides of the 3rd magnetic core,
Wherein, one sectional area of the 5th magnetic core is greater than a sectional area of the 4th magnetic core, between the 4th magnetic core and this first magnetic core and between the 4th magnetic core and this second magnetic core, there is separately one first air gap, between the 5th magnetic core and this first magnetic core and between the 5th magnetic core and this second magnetic core, there is separately an interstice, between the 3rd magnetic core and this first magnetic core and between the 3rd magnetic core and this second magnetic core, there is separately one the 3rd air gap, this first air gap is greater than the 3rd air gap, and the 3rd air gap is greater than this interstice.
10. a nonlinear inductance, comprises:
One first magnetic core;
One second magnetic core, is arranged in parallel with this first magnetic core;
One the 3rd magnetic core, is connected directly to this first magnetic core, vertically arranges between this first magnetic core and this second magnetic core;
One the 4th magnetic core, is connected directly to this first magnetic core, vertically arranges between this first magnetic core and this second magnetic core;
One the 5th magnetic core, is connected directly to this first magnetic core, vertically arranges between this first magnetic core and this second magnetic core, and the 4th magnetic core and the 5th magnetic core configured in parallel are in the both sides of the 3rd magnetic core; And
One coil unit, is wound around the 3rd magnetic core,
Wherein, between the 4th magnetic core and this second magnetic core, there is one first air gap, between the 5th magnetic core and this second magnetic core, there is an interstice, between the 3rd magnetic core and this second magnetic core, there is one the 3rd air gap, this first air gap is greater than the 3rd air gap, and the 3rd air gap is greater than this interstice.
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| CN107404241A (en) * | 2017-07-04 | 2017-11-28 | 华中科技大学 | A kind of nonlinear inductance analysis method and three-phase PWM converter control method |
| CN112255583A (en) * | 2020-10-29 | 2021-01-22 | 杭州电力设备制造有限公司 | Error compensation method for direct current transformer |
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| CN202839232U (en) * | 2012-09-18 | 2013-03-27 | 艾默生网络能源有限公司 | Magnetic core and magnetic element |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107404241A (en) * | 2017-07-04 | 2017-11-28 | 华中科技大学 | A kind of nonlinear inductance analysis method and three-phase PWM converter control method |
| CN107404241B (en) * | 2017-07-04 | 2019-06-18 | 华中科技大学 | A kind of nonlinear inductance analysis method and three-phase PWM converter control method |
| CN112255583A (en) * | 2020-10-29 | 2021-01-22 | 杭州电力设备制造有限公司 | Error compensation method for direct current transformer |
| CN112255583B (en) * | 2020-10-29 | 2023-04-14 | 杭州电力设备制造有限公司 | Error compensation method for direct current transformer |
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