CN201311823Y - Magnetic core of series excitation - Google Patents
Magnetic core of series excitation Download PDFInfo
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- CN201311823Y CN201311823Y CNU2008201236401U CN200820123640U CN201311823Y CN 201311823 Y CN201311823 Y CN 201311823Y CN U2008201236401 U CNU2008201236401 U CN U2008201236401U CN 200820123640 U CN200820123640 U CN 200820123640U CN 201311823 Y CN201311823 Y CN 201311823Y
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Abstract
The utility model relates to a magnetic core of series excitation, which comprises an A magnetic core and a B magnetic core that are crossly spliced, a C magnetic core and a D magnetic core that form a magnetic line end-to-end circulating loop together with the A magnetic core and the B magnetic core, wherein the A magnetic core and the B magnetic core are respectively provided with an intermediate column, a side pin and a bottom side vertically connected with the intermediate column and the side pin, the intermediate column and the side pin are respectively positioned on two layers, the intermediate column of the A magnetic core and the side pin of the B magnetic core as well as the C magnetic core are positioned on one layer, the intermediate column of the B magnetic core and the side pin of the A magnetic core as well as the D magnetic core are positioned on the other layer, and the bottom side of the A magnetic core and the bottom side of the B magnetic core are overlapped and spliced together. The magnetic core can lead the voltage ratio of the input end to the output end to be increased when a transformer is at the same cycle number ratio under the condition that other parameters are same. The applied circuit topological form is not changed, the cycle number of a coil is reduced, a rubber winding groove is narrowed, the volume is decreased, the copper consumption is reduced, and the power density is improved.
Description
Technical field
The utility model relates to transformer and inductor, is specifically related to the magnetic core in transformer and the inductor.
Background technology
In the prior art
Transformer or inductanceThe magnetic circuit of device is the edge
Magnetic core conducting magnetic forceLine, the magnetic line of force in every magnetic core is positioned at same plane, the magnetic core that is parallel to each other and fits together, in every magnetic core, magnetic flux is to equate continuously in the magnetic circuit that each self-forming of the magnetic line of force is independently sealed, every magnetic core, thereby voltage ratio and the number of turns are than being direct proportion function: U
1/ U
2=N
1/ N
2, there are not functional relation in the above-mentioned voltage ratio and the number of turns than the path with the magnetic circuit circulation.Because the magnetic flux of magnetic circuit is to equate continuously in existing transformer, for regulating inductance and bearing dc fields, add after the magnetic circuit or air cleft crack of branch, will increase the loss of magnetic flux, reduce the efficient of transformer.The length of magnetic circuit is shorter in existing transformer, under low inductance value condition, bigger air gap is arranged, thereby has increased the loss of magnetic flux.
Because the magnetic core that existing transformer uses, be to equate continuously with a slice magnetic core array internal magnetic flux, work as magnetic flux density, under three identical conditions of magnetic core cross-sectional area and frequency, transformer can only obtain different voltage output by changing the number of turns, and the number of turns of coil is many more, in same winding space, only reduce the line footpath of coil, so the resistance of copper cash will be multiplied, and causes electric energy loss to increase.So can want the number of turns few, or save winding space, voltage ratio is high again, efficient is good again, just constitutes contradiction between them mutually, adopts the transformer or the inductor of prior art can't break through above-mentioned contradiction.
Though also have a class transformer and inductor to use same magnetic core, in order to regulate inductance, between the magnetic core of butt joint mutually, add the air cleft crack, the air cleft crack is big more, and flux loss is also big more, Ue=Ui/ when air is arranged (1+g*Ui/l); G is an air gap length, the length of the whole magnetic circuit of l, and Ui is the permeability of magnetic core, Ue is the final effective permeability of magnetic circuit.So air gap length determines the magnetic permeability the most at last.Especially the coil plane transformer that prints on the wiring board, limited because of volume, the number of turns is few, and a little less than the electromagnetic induction, loss is more serious.
Under the condition of the original frequency of transformer, be further reduced volume, at present if frequency is brought up to the megahertz grade, when the number of turns of coil more for a long time, distributed capacitance will be bigger, loss is multiplied, necessary with few number of turns, and frequency is when improving, and the magnetic permeability of iron core also must reduce, and causes the induction amount of coil and iron core also will weaken.
When this magnetic core is old magnetic core in used transformer, require equally at the inductance of each coil, the number of turns is than the same, the circuit topology form of using is constant, but must reduce by wire circle again simultaneously, and the reductions of colloid winding slot is few, volume reduces, and copper loss reduces, and cost reduces power density and improves.
In the signal transmission transformer, be to reduce distorted signals, add the air cleft crack, make magnetic hysteresis loop more straight, because the air cleft crack increases, also cause signal attenuation serious simultaneously, the weakening of induction.
In existing inductor, the magnetic circuit in the magnetic core is not series connection, and coil can only produce once excitatory to magnetic core, the magnetic field intensity H broad of magnetic hysteresis loop, flux loss is bigger, under low inductance value condition, need big air gap, thereby will increase the loss of magnetic flux.If require in the circuit magnetic leakage flux hour, just must make stronger induction is arranged between coil and the magnetic core, at this moment will need to increase the number of turns of coil, the number of turns of coil increases the back inductance value and will increase simultaneously, inductance value increase the waveform that will influence electric current in the circuit, in order to reduce inductance value, can adopt the mode of air gap on the cross section that strengthens between the magnetic core of two ends, this method will make the loss of magnetic flux in the magnetic core increase, and this will cause the reduction of inductor efficient.Therefore be necessary to reach the operating efficiency that magnetic line of force circulating path improves transformer and inductor by changing the core structure in transformer and the inductor.
The utility model content
The purpose of this utility model is to overcome defective of the prior art, designs a kind of magnetic core that is used on transformer and the inductor.This magnetic core can make transformer or inductor can reduce the number of turns of coil, can save winding space again, can also improve the voltage ratio of input stage and output stage, and can also improve the efficient of transformer or inductor, this magnetic core can make transformer or inductor the situation lower volume of same voltage ratio or inductance value reduce half or over half, can make the volume miniaturization of transformer or inductor, perhaps can make transformer the same number of turns than the time, the voltage ratio of input and output can promote high twice or more than the twice.This magnetic core can make the magnetic line of force in the input stage magnetic core, after being coupled to output stage by this magnetic core for the first time, the magnetic line of force that can produce by this magnetic core again passes the output stage coil for the second time, so when the transformer input coil passes through a magnetic line of force, output winding is by twice or the above magnetic line of force, when other parameter was identical, the output stage voltage that adopts this magnetic core to make transformer was to have the transformer output voltage now
Twice reachesMore than, that is:
U 1 / U 2 =n (N 1 /N
2), n wherein
Be integer.WithThis magnetic core institute
GroupThe transformer of dress utilizes above-mentioned magnetic circuit circulation just to produce the ascending, descending process of primary voltage.Promptly in the transformer of this kind magnetic core, the lifting of voltage is not the number of turns that relies on coil fully.
When this magnetic core reaches for old magnetic core in used transformer, the magnetic core length of magnetic path of new magnetic core made with old magnetic core equate, just column length and both sides pin length be before (because twice of the circulation of long half of column length and both sides pin in the old magnetic core, then length reduces by half, equivalent magnetic circuit length is constant), the sectional area of magnetic core equivalence equates, volume is former half (middle column length and both sides pin length are before in the old magnetic core long half of column length and both sides pin), and the inductance of each coil is the same, and the number of turns is than the same, the circuit topology form of using is constant, each number of turns of organizing coil all reduces by half, colloid winding slot reductions half, and volume reduces, copper loss reduces, and power density doubles
The magnetic line of force can be realized series excitation in the above-mentioned magnetic core of employing in inductor, the coupling of this magnetic core pass coil once after, the magnetic line of force that this magnetic core is produced passes coil for the second time, so the magnetic line of force can twice or above circulation, and twice or the above magnetic line of force be series connected, coil to magnetic core produced twice excitatory, this inductor can narrow half area of hysteresis loop, reduce magnetic hysteresis loss, revised the linear relationship of magnetic hysteresis loop, prolonged magnetic circuit.Can pass through to regulate the length adjustment inductance value of magnetic circuit, be not only to rely on air gap to regulate, because the air cleft crack is few more, core loss is just few more, and distorted signals is few.
For achieving the above object, the technical solution of the utility model is to adopt a kind of magnetic core of series excitation, the magnetic core of described series excitation comprises A sheet magnetic core and the B sheet magnetic core that at least one group of intersection pegged graft, and at least one group constitute the magnetic line of force join end to end the C sheet magnetic core and the D sheet magnetic core of circulation circuit with described A sheet magnetic core and B sheet magnetic core, be respectively equipped with center pillar on described A sheet magnetic core and the B sheet magnetic core, limit pin and the base that vertically is connected described center pillar and limit pin, described center pillar and limit pin lay respectively on two aspects, the limit pin of the center pillar of described A sheet magnetic core and B sheet magnetic core and C sheet magnetic core are positioned at same aspect, the limit pin of the center pillar of described B sheet magnetic core and A sheet magnetic core and D sheet magnetic core are positioned at another aspect, and the base of described A sheet magnetic core is overlapped the to each other with the base of B sheet magnetic core and is plugged on.
Wherein, between individual each mating surface of A sheet magnetic core that described intersection is pegged graft and B sheet magnetic core, add the not magnetic layer of insulation, also add the not magnetic layer of insulation between C sheet magnetic core and the D sheet magnetic core mating surface.
Wherein, the A sheet magnetic core that described intersection is pegged graft and the orthographic projection of B sheet magnetic core or cross section be projected as E shape, opening one side of described E shape is used for cooperating with the skeleton grafting that is wound with coil.
Wherein, A sheet magnetic core and B sheet magnetic core that described intersection is pegged graft match with D sheet magnetic core with the C sheet magnetic core of two pure flat E shapes after described E shape opening one side is packed the skeleton that is wound with coil into again.
Wherein, described one group of intersection grafting A sheet magnetic core and B sheet magnetic core, matching with the C sheet magnetic core and the D sheet magnetic core of two plane E shapes, is that E shape opening one side is wound with on the skeleton of coil with the relative insertion of pure flat E shape opening one side of C sheet magnetic core and D sheet magnetic core with the A sheet magnetic core of described intersection grafting and the orthographic projection of B sheet magnetic core.
Wherein, A sheet magnetic core and B sheet magnetic core that described intersection is pegged graft, match with the C sheet magnetic core and the D sheet magnetic core of two plane E shapes, the cross section of described A sheet magnetic core and B sheet magnetic core is projected as E shape opening one side is wound with on the skeleton of coil with the relative insertion of pure flat E shape opening one side of C sheet magnetic core and D sheet magnetic core.
Wherein, A sheet magnetic core that described intersection is pegged graft and the center pillar in the B sheet magnetic core and limit pin a slice are long center pillar and long limit pin, and another sheet is brachymedial post and minor face pin.
Wherein, described being plugged between the A sheet magnetic core that is wound with the coil rack two ends and B sheet magnetic core and C sheet magnetic core and the D sheet magnetic core can be provided with air gap.
Wherein, be integral with glue or epoxy resin cure between A sheet magnetic core that described intersection is pegged graft and the B sheet magnetic core, C sheet magnetic core and D sheet magnetic core are integral with glue or epoxy resin cure, and institute is described, and both become overall with skeleton with glue or epoxy resin cure again.
Wherein, the not magnetic layer of described insulation is dielectric film or is insulating cement.
Advantage of the present utility model and beneficial effect are that the purpose of this utility model is to overcome defective of the prior art, design a kind of magnetic core that is used on transformer and the inductor.This magnetic core can make transformer or inductor can reduce the number of turns of coil, can save winding space again, can also improve the voltage ratio of input stage and output stage, and can also improve the efficient of transformer or inductor, this magnetic core can make transformer or inductor at same input and output voltage ratio, the identical situation lower volume of inductance value reduce half or over half, can make the volume miniaturization of transformer or inductor, perhaps can make transformer the same number of turns than the time, the voltage ratio of input and output can promote high twice or more than.Because reducing of volume will reduce raw-material consumption, also reduced transformer or inductor cost in reduced volume.Because this magnetic core can make the magnetic line of force in the input stage magnetic core, after being coupled to output stage by this magnetic core for the first time, also the magnetic line of force that can produce by this magnetic core again passes the output stage coil for the second time, so when the transformer input coil passes through a magnetic line of force, output winding is by twice or the above magnetic line of force, when other parameter was identical, the output stage voltage that adopts this magnetic core to make transformer was more than the twice of existing transformer output voltage reaches, that is: U
1/ U
2=n (N
1/ N
2), wherein n is an integer.The transformer of assembling with this magnetic core utilizes above-mentioned magnetic circuit circulation just to produce the ascending, descending process of primary voltage.Promptly in the transformer of this kind magnetic core, the lifting of voltage is not the number of turns that relies on coil fully.That is to say that this transformer is constant at core volume, the efficient of transformer has improved twice or more than the twice under the constant situation of the number of turns of input stage and output stage coil.
When this magnetic core reaches for old magnetic core in used transformer, the magnetic core length of magnetic path of new magnetic core made with old magnetic core equate, just column length and both sides pin length be before (because twice of the circulation of long half of column length and both sides pin in the old magnetic core, then length reduces by half, equivalent magnetic circuit length is constant), the sectional area of magnetic core equivalence equates, volume is former half (middle column length and both sides pin length are before in the old magnetic core long half of column length and both sides pin), and the inductance of each coil is the same, and the number of turns is than the same, the circuit topology form of using is constant, each number of turns of organizing coil all reduces by half, colloid winding slot reductions half, and volume reduces, copper loss reduces, and power density doubles.
In inductor, adopt in the above-mentioned magnetic core magnetic line of force can realize series excitation equally, the coupling of this magnetic core pass coil once after, the magnetic line of force that this magnetic core is produced passes coil for the second time, so the magnetic line of force can twice or above circulation, and twice or the above magnetic line of force be series connected, coil to magnetic core produced twice excitatory, this inductor can narrow half area of hysteresis loop, reduce magnetic hysteresis loss, revised the linear relationship of magnetic hysteresis loop, prolonged magnetic circuit.Can pass through to regulate the length adjustment inductance value of magnetic circuit, be not only to rely on air gap to regulate, because the air cleft crack is few more, core loss is just few more, and distorted signals is few.
Description of drawings
Figure 1A is the assembling schematic diagram of A sheet magnetic core and B sheet magnetic core in the utility model;
Figure 1B is an A sheet core structure schematic diagram in the utility model;
Fig. 1 C is a B sheet core structure schematic diagram in the utility model;
Fig. 2 is the assembling schematic diagram of A sheet magnetic core in the utility model, B sheet magnetic core, C sheet magnetic core, D sheet magnetic core;
Fig. 3 is A sheet magnetic core and the short assembling schematic diagram of B sheet magnetic core one length of a film a slice in the utility model;
Fig. 4 is the assembling schematic diagram of magnetic core among Fig. 3 and C sheet magnetic core, D sheet magnetic core;
Fig. 5 is the structural representation that magnetic core among Fig. 2 and coil are assembled together;
Fig. 6 is the structural representation that magnetic core among Fig. 4 and coil are assembled together;
Fig. 7 is the interior magnetic line of force circulation circuit schematic diagram of magnetic core in the utility model;
Fig. 8 is magnetic hysteresis loop figure in the existing magnetic core;
Fig. 9 is the interior magnetic hysteresis loop figure of magnetic core in the utility model;
Figure 10 is a magnetic line of force circulation circuit schematic diagram in the existing magnetic core;
Figure 11 is a magnetic line of force circulation circuit schematic diagram in the utility model magnetic core.
Among the figure: 1, A sheet magnetic core; The center pillar of 1-1, A sheet magnetic core; The limit pin of 1-2, A sheet magnetic core; The base of 1-3, A sheet magnetic core; 2, B sheet magnetic core; The center pillar of 2-1B sheet magnetic core; The limit pin of 2-2, B sheet magnetic core; The base of 2-3, B sheet magnetic core; 3, Jue Yuan not magnetic layer; 4, C sheet magnetic core; 4-1, C sheet magnetic core center pillar; 4-2; C sheet magnetic core limit pin; 5, D sheet magnetic core; 5-1, D sheet magnetic core center pillar; 5-2; D sheet magnetic core limit pin; 6, primary coil; 7, secondary coil.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is further described.Following examples only are used for the technical solution of the utility model more clearly is described, and can not limit protection range of the present utility model with this.
As shown in Figs. 7-9, the principle that magnetic core described in the utility model can produce series excitation is: the helical coil of well-known energising can produce magnetic field, its magnetic field intensity H, H=NI/L, (wherein I is the electric current of flowing through coil, and N is the number of turns of coil, and L is the coil axial length).The inner magnetic conductor that adds, then the magnetic line of force is redistributed by the magnetic conductor polymerization, difference according to magnetic conductor material magnetic conduction ability, differ by force in the magnetic field of the induction of magnetic conductor inside, and the physical quantity of the magnetic flux density in the magnetic material conductor of describing is designated as B, magnetic induction density B=UH, (U is the magnetic conduction ability of magnetic conductor, is designated as magnetic permeability).When the electric current in the coil is not a constant-current source but when changing, the cycle of measuring B and H can obtain well-known magnetic hysteresis loop when changing process, as shown in Figure 8, (Hr, Hs, Br, Bs).When not having air gap GAP, according to the cycle duality, that show when magnetic conductor is remanent magnetism Br, and that corresponding coil shows is coercive force Hr.Realize as far as possible that for magnetic power head and the tail are closed, form sealing, reduce leakage flux.Magnetic conductor done circularizing closure or EE, EI, ER, EP, RM etc., closed in order to two parts assembling, become the sealing closed magnetic circuit.When there was air gap GAP the magnetic circuit intermediate cross-section, magnetic hysteresis loop dipped down, and showed Br and reduced, and Bs is constant.What this moment, corresponding coil showed is that coercive force Hr does not reduce.When why not having air gap GAP, Hr and Br have the physics corresponding relation, and when air gap GAP was arranged, Br reduced, Hr but have the variation of essence? have no idea Hr and Br are reduced simultaneously? so the utility model has been done following improvement.
As shown in Figure 8, talk about by magnetic core at first earlier, reduce Hr, and Hr derives from the magnetic effect of coil, be magnetic field in the coil to the excitation of magnetic conductor, if directly reduce the number of turns of coil or the electric current in the coil, just H changes at the part magnetic hysteresis loop that variation is equivalent in the magnetic hysteresis loop in fact.Apparent face is easily seen the Hr in can't mobile magnetic hysteresis loop, after the circle of relocating, only be left to have changed the magnetic material conductor, can magnetic conductor itself as excitation, thereby change the shape of magnetic hysteresis loop? prolonging the magnetic circuit of this thinking the utility model analysis magnetic conductor, the material of magnetic conductor can not change, when opening the shape of air gap change magnetic hysteresis loop, be the material that does not change magnetic conductor, so only remaining magnetic circuit can change.In order to change magnetic circuit, analyze magnetic circuit used when measuring magnetic hysteresis loop earlier, it is approximately from coil while advancing the other closed magnetic line of force circular ring type post of head and the tail that passes, so to influence the Hr Practical significance less because be subjected to the elongated weak point of the constraint of coil or thickness, examine and filter magnetic circuit and from coil, only pass once us and change structure, allow magnetic circuit from coil, pass twice.The utility model has obtained the curve that coercive force Hr reduces.Turn back physical analysis process of the present utility model: as shown in figure 10, normal magnet ring is divided into two parts, each part is that the magnetic line of force potential barrier of Φ/2 is crossed coil, both equal and opposite in directions, and direction is identical, and is parallel and non-intersect.As shown in figure 11, the magnetic line of force of head and the tail disconnection is interconnected at together again when adopting the magnet ring of this practicality intersection grafting in the heart, obtained series connection magnetic line of force magnetic core, when coil only to top when excitatory the latter half do not coil, inductance has only 1/4 of the magnetic line of force among Figure 10, be that magnetic line of force length doubles because cross-sectional area reduces half.When coil winding, also the lower part envelope is entered simultaneously because series relationship it be the twice of the inductance of Figure 10.Because what of transform power are the size of inductance directly determined, thus in Figure 11 when cross-sectional area constant, magnetic line of force length reduces half, promptly circle diameter reduces half.The same in order to accomplish with inductance among Figure 10, must reduce half the number of turns.The magnetic core of this explanation series excitation can be accomplished same excitatory with still less the number of turns, the same number of turns is same excitatory as long as littler electric current just can be accomplished, because the electric current of coil reduces, diminishes so solved Hr.
As shown in Figs. 5 to 7, in the utility model, at first magnetic core has been selected magnetic material for use, described magnetic core is made the structure that orthographic projection or cross section are projected as E shape, on circular or square skeleton, be wound with primary coil 6 and secondary coil 7, center at skeleton is provided with through hole, the two ends in described frame center hole is inserted the center pillar of E shape magnetic core respectively.Because the utility model adopts one group to be to intersect the A sheet magnetic core 1 and B sheet magnetic core 2 structures of pegging graft, another group is the C sheet magnetic core 4 and D sheet magnetic core 5 structures of two plane E shapes or I shape, when elementary coil 6 with after alternating current is connected, to produce alternating magnetic field around the primary coil 6, described alternating magnetic field is strengthened by described magnetic core.As shown in Figure 7, the magnetic line of force in this magnetic field circulating path in above-mentioned magnetic core of the present utility model is, the magnetic line of force conducts to the limit pin 1-2 of A sheet magnetic core along the center pillar 1-1 of A sheet magnetic core, conduct to the limit pin 5-2 of D sheet magnetic core again from the limit pin 1-2 of A sheet magnetic core, conduct to the center pillar 5-1 of D sheet magnetic core again from the limit pin 5-2 of D sheet magnetic core 5, center pillar 5-1 from D sheet magnetic core conducts to B sheet magnetic core center pillar 2-1 again, conduct to the limit pin 2-2 of B sheet magnetic core again from the center pillar 2-1 of B sheet magnetic core, conduct to the limit pin 4-2 of C sheet magnetic core again from the limit pin 2-2 of B sheet magnetic core, conduct to the center pillar 4-1 of C sheet magnetic core again from the limit pin 4-2 of C sheet magnetic core, the last center pillar 1-1 that transfers back to A sheet magnetic core again from the center pillar 4-1 of C sheet magnetic core makes two branch magnetic circuits in original transformer be concatenated into one road closed magnetic circuit that links from beginning to end.Because in transformer, the magnetic field that above-mentioned primary coil 6 produced, the magnetic line of force will can make secondary coil 7 produce induced electromotive force and induced current simultaneously, induced current in the secondary coil 6 also will produce magnetic field, the magnetic line of force, the magnetic field that the magnetic field that secondary coil 7 is produced, the magnetic line of force will be produced with primary coil, the effect that magnetic line of force mutual superposition strengthens reaching series excitation mutually.
Concrete technical application scheme of the present utility model is as follows:
A kind of magnetic core of series excitation, the magnetic core of described series excitation comprise A sheet magnetic core 1 and the B sheet magnetic core 2 that at least one group of intersection pegged graft, shown in accompanying drawing 1A.And at least one group constitute the magnetic line of force join end to end the C sheet magnetic core 4 and the D sheet magnetic core 5 of circulation circuit with described A sheet magnetic core 1 and B sheet magnetic core 2, as shown in Figure 2, be respectively equipped with on described A sheet magnetic core 1 and the B sheet magnetic core 2, the limit pin 1-2 of the center pillar 2-1 of the center pillar 1-1 of A sheet magnetic core, B sheet magnetic core, A sheet magnetic core, the limit pin 2-2 of B sheet magnetic core,, vertically connect the base 1-3 of the A sheet magnetic core of above-mentioned center pillar and limit pin, the base 2-3 of B sheet magnetic core, shown in accompanying drawing 1B.Above-mentioned center pillar and limit pin lay respectively on two aspects, the limit pin 2-2 and the C sheet magnetic core 4 of the center pillar 1-1 of described A sheet magnetic core and B sheet magnetic core are positioned at same aspect, the limit pin 1-2 and the D sheet magnetic core 5 of the center pillar 2-1 of described B sheet magnetic core and A sheet magnetic core are positioned at another aspect, and the base 1-3 of described A sheet magnetic core is overlapped the to each other with the base 2-3 of B sheet magnetic core and is plugged on shown in accompanying drawing 1C.
In the utility model, between individual each mating surface of A sheet magnetic core 1 that described intersection is pegged graft and B sheet magnetic core 2, add the not magnetic layer of insulation, also add the not magnetic layer 3 of insulation between C sheet magnetic core and the D sheet magnetic core mating surface.The not magnetic layer 3 of above-mentioned insulation will make the magnetic line of force between two magnetic cores of mutual superposition be left, mutual conduction not, and the magnetic line of force only could penetrate into from a slice magnetic core in another sheet magnetic core with perpendicular joint face or the air gap place of the magnetic line of force.
In the utility model, most preferred embodiment is to adopt the A sheet magnetic core 1 that described intersection is pegged graft and the orthographic projection of B sheet magnetic core 2 or the projection in cross section to make E shape, and opening one side of described E shape is used for cooperating with the skeleton grafting that is wound with coil.
In the utility model, A sheet magnetic core 1 and B sheet magnetic core 2 that described intersection is pegged graft, after packing the skeleton that is wound with coil into, described E shape opening one side matches with D sheet magnetic core 5 with the C sheet magnetic core 4 of two I shapes again, or described one group of intersection grafting A sheet magnetic core 1 and B sheet magnetic core 2, match with the C sheet magnetic core 4 and the D sheet magnetic core 5 of two plane E shapes, with the A sheet magnetic core 1 of described intersection grafting and the orthographic projection of B sheet magnetic core 2 is that the relative insertion with E shape opening one side of C sheet magnetic core 4 and D sheet magnetic core 5 of E shape opening one side is wound with on the skeleton of coil, as shown in Figure 5.
In the utility model, A sheet magnetic core 1 and B sheet magnetic core 2 that described intersection is pegged graft, match with the C sheet magnetic core 4 and the D sheet magnetic core 5 of two plane E shapes, the cross section of described A sheet magnetic core 1 and B sheet magnetic core 2 is projected as the relative insertion with E shape opening one side of C sheet magnetic core 4 and D sheet magnetic core 5 of E shape opening one side is wound with on the skeleton of coil, described cross section is projected as the magnetic core that E shape open magnetic core comprises (ER, EI, EP, ETD, EFD, RM) shape.
In the utility model, 2 center pillar and limit pin a slice are provided with growth center pillar and long limit pin in the A sheet magnetic core 1 that described intersection can be pegged graft and the B sheet magnetic core, and another sheet is arranged to brachymedial post and minor face pin, as Fig. 3 and shown in Figure 6.
In the utility model, the described not magnetic layer 3 that can be provided with air gap or insulation between the A sheet magnetic core 1 that is wound with the coil rack two ends and B sheet magnetic core 2 and C sheet magnetic core 4 and the D sheet magnetic core 5 that is plugged on.
In the utility model, be integral with glue or epoxy resin cure between A sheet magnetic core 1 that described intersection is pegged graft and the B sheet magnetic core 2, described C sheet magnetic core 4 becomes another body with D sheet magnetic core 5 usefulness glue or epoxy resin cure, aforementioned both are wound with the skeleton of coil with packing into again, become overall with glue or epoxy resin or all power water cures.
In the utility model, the not magnetic layer 3 of described insulation is dielectric film or is insulating cement.
As shown in Figure 6, in the utility model, when elementary coil 6 is wrapped between A sheet magnetic core 1 and the B sheet magnetic core 2, after primary coil 6 energisings at this moment, the magnetic flux in the primary coil 6 middle part magnetic cores equals half of magnetic flux in the secondary coil 7 middle part magnetic cores.The utility model can use bigger line footpath, wire circle still less, lower copper loss in same winding space and under the condition of lifting voltage ratio.For this reason, the utility model has designed the magnetic core of the magnetic circuit series excitation that is used for transformer, this magnetic core is assembled into one A sheet magnetic core 1 and B sheet magnetic core 2 by insulating material, and then be assembled into transformer with C sheet magnetic core 4 and D sheet magnetic core 5, A sheet magnetic core 1 and B sheet magnetic core 2 are docked transformer in aggregates with C sheet magnetic core 4 and D sheet magnetic core 5 being wound with on the skeleton of coil, fix with adhesive plaster or epoxy fat again.
The designed core structure of the utility model is compared with existing core structure, as shown in Figure 5, on the transformer of forming with existing magnetic core, take off the E shape magnetic core of coiling skeleton one side on the existing transformer or the magnetic core of E tee section, change A sheet magnetic core 1 and B sheet magnetic core 2 that one group of intersection is pegged graft, can obtain higher voltage, effect is apparent in view.Two kinds of magnetic core of transformers are compared, structurally the magnetic core in the utility model can be realized walking around mutually each other encircling and constitute end to end flux loop, magnetic core in the utility model can make the magnetic line of force pass primary coil 6 and secondary coil 7 for twice, as shown in Figure 6, if it is short that A sheet magnetic core 1 and B sheet magnetic core 2 are a length of a film a slice, when being contained in primary coil 6 between lengthy motion picture and the short-movie, in the magnetic core in the primary coil 6 for once the magnetic magnetic line of force pass through, in secondary coil 7, be plugged with intersection grafting A sheet magnetic core 1 and B sheet magnetic core 2, just will there be twice magnetic line of force to pass through in the magnetic core in secondary coil 7, and the magnetic line of force that passes through for twice is concatenated together, consider the influence of leakage flux, the twice that the voltage of output can reach the output voltage that has core transformers now is low slightly.
As shown in Figure 5, if during the equal in length of A sheet magnetic core and B sheet magnetic core, magnetic flux in the magnetic core in the primary coil 6 equals the magnetic flux in the magnetic core in the secondary coil 7, all excitatory twice of the magnetic flux in magnetic flux in the magnetic core in the primary coil 6 and the secondary coil 7 in the magnetic core.Magnetic flux has twice or above circulation when series connection, and coil is excitatory to twice of magnetic core, as shown in Figure 9, can narrow half area of hysteresis loop, has reduced magnetic hysteresis loss, as magnetic hysteresis loop.
Fine rule among Fig. 8 is the magnetic hysteresis loop of common soft magnetic material, thick line for opening the magnetic hysteresis loop in air cleft crack, the obvious remanent magnetism of this magnetic hysteresis loop reduces, magnetic saturation is constant, magnetic hysteresis loop tilts more and is linear;
Thick line among Fig. 9 is the magnetic hysteresis loop of series excitation on the basis of opening the air cleft crack, and the obvious remanent magnetism of this hysteresis line reduces, and coercive force reduces, and area reduces, and magnetic saturation is constant, and magnetic hysteresis loop is more steep and linear, and B-H is narrower simultaneously.
The advantage of above-mentioned enforcement is, the magnetic core of described series excitation can make transformer the same number of turns than the time, the voltage ratio of input and output can promote high twice or more than.This magnetic core can make the magnetic magnetic line of force in the input stage magnetic core, after being coupled to output stage by this magnetic core for the first time, the magnetic line of force that can produce by this magnetic core again passes the output stage coil for the second time, so when the transformer input coil passes through a magnetic line of force, output winding is by twice or the above magnetic line of force, when other parameter was identical, the output stage voltage that adopts this magnetic core to make transformer was more than the twice of existing transformer output voltage reaches, i.e. U
1/ U
2=n (N
1/ N
2), wherein n is an integer.The transformer of assembling with this magnetic core utilizes above-mentioned magnetic circuit circulation just to produce the ascending, descending process of primary voltage.Promptly in the transformer of this kind magnetic core, the lifting of voltage is not the number of turns that relies on coil fully.
Transformer with existing magnetic core making, when our newly-designed magnetic core reach for the time, the magnetic core length of magnetic path of new magnetic core made with old magnetic core equate, just column length and both sides pin length be before (because twice of the circulation of long half of column length and both sides pin in the old magnetic core, then length reduces by half, equivalent magnetic circuit length is constant), the sectional area of magnetic core equivalence equates, volume is former half (middle column length and both sides pin length are before in the old magnetic core long half of column length and both sides pin), the inductance of each coil is the same, the number of turns is than the same, and the circuit topology form of application is constant, and each coil turn number average reduces by half, colloid winding slot reductions half, volume reduces, and copper loss reduces, and power density doubles.
In inductor, adopt the magnetic line of force in the above-mentioned magnetic core can realize series excitation, the coupling of this magnetic core pass coil once after, the magnetic line of force that this magnetic core is produced passes coil for the second time, so the magnetic line of force can twice or above circulation, and twice or the above magnetic line of force be series connected, coil to magnetic core produced twice excitatory, this inductor can narrow half area of hysteresis loop, reduce magnetic hysteresis loss, revised the linear relationship of magnetic hysteresis loop, prolonged magnetic circuit.Can pass through to regulate the length adjustment inductance value of magnetic circuit, be not only to rely on air gap to regulate, because the air cleft crack is few more, core loss is just few more, and distorted signals is few.
The above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (11)
1, a kind of magnetic core of series excitation, it is characterized in that, the magnetic core of described series excitation comprises A sheet magnetic core and the B sheet magnetic core that at least one group of intersection pegged graft, and at least one group constitute the magnetic line of force join end to end the C sheet magnetic core and the D sheet magnetic core of circulation circuit with described A sheet magnetic core and B sheet magnetic core, be respectively equipped with center pillar on described A sheet magnetic core and the B sheet magnetic core, limit pin and the base that vertically is connected described center pillar and limit pin, described center pillar and limit pin lay respectively on two aspects, the limit pin of the center pillar of described A sheet magnetic core and B sheet magnetic core and C sheet magnetic core are positioned at same aspect, the limit pin of the center pillar of described B sheet magnetic core and A sheet magnetic core and D sheet magnetic core are positioned at another aspect, and the base of described A sheet magnetic core is overlapped the to each other with the base of B sheet magnetic core and is plugged on.
2, the magnetic core of series excitation as claimed in claim 1, it is characterized in that, between individual each mating surface of A sheet magnetic core that described intersection is pegged graft and B sheet magnetic core, add the not magnetic layer of insulation, also add the not magnetic layer of insulation between C sheet magnetic core and the D sheet magnetic core mating surface.
3, the magnetic core of series excitation as claimed in claim 2 is characterized in that, the A sheet magnetic core that described intersection is pegged graft and the orthographic projection of B sheet magnetic core or cross section be projected as E shape, opening one side of described E shape is used for cooperating with the skeleton grafting that is wound with coil.
4, the magnetic core of series excitation as claimed in claim 3 is characterized in that, A sheet magnetic core and B sheet magnetic core that described intersection is pegged graft match with D sheet magnetic core with the C sheet magnetic core of two E types (or I shape) after described E shape opening one side is packed the skeleton that is wound with coil into again.
5, the magnetic core of series excitation as claimed in claim 3, it is characterized in that, described one group of intersection grafting A sheet magnetic core and B sheet magnetic core, matching with the C sheet magnetic core and the D sheet magnetic core of two plane E shapes, is that the relative insertion with E shape opening one side of C sheet magnetic core and D sheet magnetic core of E shape opening one side is wound with on the skeleton of coil with the A sheet magnetic core of described intersection grafting and the orthographic projection of B sheet magnetic core.
6, the magnetic core of series excitation as claimed in claim 3, it is characterized in that, A sheet magnetic core and B sheet magnetic core that described intersection is pegged graft, match with the C sheet magnetic core and the D sheet magnetic core of two plane E shapes, the cross section of described A sheet magnetic core and B sheet magnetic core is projected as the relative insertion with E shape opening one side of C sheet magnetic core and D sheet magnetic core of E shape opening one side is wound with on the skeleton of coil.
As the magnetic core of each described series excitation in the claim 4 to 6, it is characterized in that 7, A sheet magnetic core that described intersection is pegged graft and the center pillar in the B sheet magnetic core and limit pin a slice are long center pillar and long limit pin, another sheet is brachymedial post and minor face pin.
8, the magnetic core of series excitation as claimed in claim 7 is characterized in that, described being plugged between the A sheet magnetic core that is wound with the coil rack two ends and B sheet magnetic core and C sheet magnetic core and the D sheet magnetic core can be provided with air gap.
9, the magnetic core of series excitation as claimed in claim 8, it is characterized in that, be integral with glue or epoxy resin cure between A sheet magnetic core that described intersection is pegged graft and the B sheet magnetic core, C sheet magnetic core and D sheet magnetic core are integral with glue or epoxy resin cure, preceding described both reinstall behind the skeleton that is wound with coil and become overall with glue or epoxy resin cure again.
10, the magnetic core of series excitation as claimed in claim 2 is characterized in that, the not magnetic layer of described insulation is dielectric film or is insulating cement.
11, the magnetic core of series excitation as claimed in claim 2 is characterized in that, if during magnet ring, but one-shot forming is as a whole or the amalgamation of multi-disc phase, the magnet ring flux loop join end to end twice of circulation or more than.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201236401U CN201311823Y (en) | 2008-11-11 | 2008-11-11 | Magnetic core of series excitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201236401U CN201311823Y (en) | 2008-11-11 | 2008-11-11 | Magnetic core of series excitation |
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| Publication Number | Publication Date |
|---|---|
| CN201311823Y true CN201311823Y (en) | 2009-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201236401U Expired - Fee Related CN201311823Y (en) | 2008-11-11 | 2008-11-11 | Magnetic core of series excitation |
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| CN (1) | CN201311823Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010072055A1 (en) * | 2008-12-26 | 2010-07-01 | Sun Jiankang | Magnetic device with series excitation magnetic core |
| CN109378180A (en) * | 2018-12-20 | 2019-02-22 | 深圳市雅玛西电子有限公司 | Vehicle-mounted integrated transformer |
| CN113380516A (en) * | 2020-03-10 | 2021-09-10 | 台达电子企业管理（上海）有限公司 | Coupling inductor and power module |
-
2008
- 2008-11-11 CN CNU2008201236401U patent/CN201311823Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010072055A1 (en) * | 2008-12-26 | 2010-07-01 | Sun Jiankang | Magnetic device with series excitation magnetic core |
| CN101552101B (en) * | 2008-12-26 | 2013-01-23 | 孙建康 | Magnetic device with series excitation magnetic core |
| CN109378180A (en) * | 2018-12-20 | 2019-02-22 | 深圳市雅玛西电子有限公司 | Vehicle-mounted integrated transformer |
| CN113380516A (en) * | 2020-03-10 | 2021-09-10 | 台达电子企业管理（上海）有限公司 | Coupling inductor and power module |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090916 Termination date: 20141111 |
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| EXPY | Termination of patent right or utility model |