CN1841584A - Transformer - Google Patents
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- CN1841584A CN1841584A CNA2006100678458A CN200610067845A CN1841584A CN 1841584 A CN1841584 A CN 1841584A CN A2006100678458 A CNA2006100678458 A CN A2006100678458A CN 200610067845 A CN200610067845 A CN 200610067845A CN 1841584 A CN1841584 A CN 1841584A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
- H01F27/325—Coil bobbins
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
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- Manufacturing & Machinery (AREA)
- Coils Of Transformers For General Uses (AREA)
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Abstract
There provide a low cost and high performance transformer which is adjustable for the optimum value of the leakage inductance without changing the shape of the bobbin. The transformer comprises a primary and secondary windings (1), (2), and a bobbin (10) having a first and second winders (11), (12) for winding the primary and secondary windings (1), (2). Each or one of the first and second winders (11), (12) is separated into a plurality of divisions in the axial direction of the bobbin (10). The ratio of the winding numbers of the separately disposed primary or secondary winding (1), (2) is changed to adjust the leakage inductance with the primary and secondary windings (1), (2), thus easily changing the value of the leakage inductance according to the purpose of use of the transformer.
Description
Technical field
The present invention relates to transformer, relate in particular to the transformer that uses in the supply unit of resonance type switching power etc.
Background technology
In order to reduce switching loss and to reduce noise, switching waveform whole or local on utilize the resonance of the leakage inductance (leakage inductance) of transformer and resonance electricity consumption container to move the resonance type switching power increasing day by day.Yet among resonance type switching power, because desired output goes into condition differences such as voltage, thereby best primary inductance or leakage inductance are also different.So, in order to produce the high-performance variable depressor that adapts with its purposes, the inductance of the elementary winding of the suitable selection of need transformer or the value of leakage inductance.
Following Patent Document 1 is that publicity goes out following transformer, and it has disposed elementary winding and secondary winding, and the bobbin with the 2nd coiling portion of the 1st coiling portion of the elementary winding of reeling and coiling secondary winding; The 2nd coiling portion bobbin axially on after separating, through the two ends of flange configurations in the 1st coiling portion.The transformer of Patent Document 1 is by adopting respectively at the central part of three bobbins of the cutting apart elementary winding of reeling, and the structure of both sides coiling secondary winding shortens the distance between elementary winding and the secondary winding, reduces leakage inductance.Because this kind transformer stably adapts to desired value for inductance or the leakage inductance that makes transformer, and make the production lotization of transformer, need the 1st coiling portion and the 2nd coiling portion, the flange that separates elementary winding and secondary winding is set at definite shape made.
Yet, even if the output power of resonance type switching power is identical, transformer often changes because of the output voltage and the peak load of resonance type switching power, the consideration of electrical efficiency when improving usual use the or the power consumption when reducing non-loaded standby etc. needs to change the value of inductance and leakage inductance.In addition, even if transformer is under the situation of the identical leakage inductance of needs, for example under the situation of the resonance type switching power of same input voltage, because output voltage difference, the number of turns of secondary winding is also different, thereby because its leakage inductance difference, condition of resonance is also different, thereby has produced the problem of the best operation condition that departs from transformer.
The inductance value of transformer, the number of turns of available winding and the interval between iron core are adjusted, and be corresponding with it, and the value of leakage inductance then depends on elementary winding and the distance between the width of secondary winding, elementary winding and secondary winding and the area in opposite directions of winding.Because so-called elementary winding and the width of secondary winding and the interval that the distance between elementary winding and secondary winding depends on the flange of bobbin, thereby the value of leakage inductance, its major part depends on the shape of bobbin.Yet, in order to use many expensive moulds to prepare many kinds of bobbins and unrealistic according to making the inductance of transformer and leakage inductance under the various conditions of transformer, all become optimum value.Therefore, among used transformer, the value of inductance and leakage inductance is in conditions such as power converter efficient of sacrificing Switching Power Supply or heat generation, by what form near the value compromise of optimum value as far as possible.
In addition, the transformer that uses in resonance type switching power is because the electric current that flows in constituting the enamelled wire of winding is a sine wave shape, thereby than the switching current of brachmorphy ripple, has that the peak electricity rheology is big, copper loss becomes big trend.In addition, in order to realize the miniaturization of resonance type switching power, set switching frequency very high, be subjected to the influence of the skin effect etc. of copper cash, among the big single line of diameter, it is big that copper loss becomes.So among a part of transformer,, in winding, use the twisted wire that forms by the less fine copper wire strands of high-frequency current loss in order to reduce copper loss.
Yet, because according to the desired safety standard of transformer, must fully guarantee the elementary winding of transformer and space length, leakage distance and the withstand voltage properties between secondary winding and the iron core, thereby must be by on the lead-out wire of winding, inserting insulating sleeve, or guarantee its insulating properties and leakage distance each other with insulating tape.Want to make the whole twisted wires of fine copper wire of bunchy to pierce into very difficulty of insulating sleeve, thereby can't the actual production transformer.In addition, even if the use insulating tape is guaranteed space length and leakage distance between elementary winding and the secondary winding, because twisted wire is very scattered, thereby the poor reliability of transformer.Also have, the operability when using the transformer of twisted wire to make is poor, increases with number and manufacturing cost, thereby has improved the manufacturing unit price of transformer.
Corresponding with it, following Patent Document 2 publicities go out another kind of transformer, and it has disposed elementary winding and secondary winding, and bobbin, and it has reel the 1st coiling portion of elementary winding and the 2nd coiling portion of coiling secondary winding; The 1st coiling portion and the 2nd coiling portion bobbin axially on be separated into a plurality of, through the flange alternate configurations.The transformer of Patent Document 2 is guaranteed its insulating properties by the flange of bobbin being brought up to the space length that can fully keep between elementary winding and the secondary winding and the degree of leakage distance.Therefore the operating efficiency in the time of can improving the manufacturing transformer by omission insulating sleeve and insulating tape.
(Patent Document 1) spy opens the 2004-31611 communique
(Patent Document 2) spy opens the 7-283037 communique
Summary of the invention
Yet the transformer of Patent Document 2 becomes greatly the profile of transformer owing to set the flange of bobbin very highly, has produced the problem on the product that can't be used for nearest small-sized and slimming.
Therefore, the objective of the invention is to provide a kind of low cost, high performance transformer by addressing the above problem.More specifically, the object of the present invention is to provide a kind of transformer that is easy to adjust the leakage inductance value.In addition, another object of the present invention is to provide a kind of profile little, can fully guarantee the space length between elementary winding and the secondary winding and the transformer of leakage distance.
Transformer of the present invention provides a kind of shape that needn't change bobbin 10 and flange (4) as before leakage inductance can be adjusted to low cost, the high performance transformer of optimum value.Transformer of the present invention comprises: elementary winding 1 and secondary winding 2; With bobbin 10, it has volume and scratches the 1st coiling portion 11 of elementary winding 1 and the 2nd coiling portion 12 of coiling secondary winding 2; The 1st coiling portion 11 and the 2nd coiling portion 12 the two or wherein any one party configured separate on the axis direction of bobbin is a plurality of.Owing to by the elementary winding of change configured separate or the number of turns ratio of secondary winding, be easy to adjust the leakage inductance value of elementary winding and secondary winding, therefore, can be easy to change the value of leakage inductance according to the purposes of transformer.
If adopt the present invention, needn't change the shape of bobbin, when can obtain best leakage inductance value,, therefore can provide the transformer of low-cost and high-performance owing to can fully guarantee space length and leakage distance between elementary winding and the secondary winding.
Description of drawings
Fig. 1 is the ground plan that the execution mode of transformer of the present invention is adopted in expression.
Fig. 2 is the profile along the A-A line of Fig. 1.
Fig. 3 is the installation diagram that has omitted Fig. 1 of winding.
Fig. 4 is the sketch and the characteristic curve chart of structure of the transformer of presentation graphs 1.
Fig. 5 is the sketch and the characteristic curve chart of the transformer device structure of expression the 1st modification.
Fig. 6 is the sketch of the transformer device structure of expression the 2nd modification.
Fig. 7 is the sketch of the transformer device structure of expression the 3rd modification.
Fig. 8 is the sketch of the transformer device structure of expression the 4th modification.
Embodiment
The execution mode of transformer of the present invention is described according to Fig. 1～Fig. 8 below.
As Fig. 1～shown in Figure 3, the transformer of present embodiment has: elementary winding (1) and secondary winding (2), and it is made of enamelled wire; Bobbin 10, it has reel the 1st coiling portion (11) of elementary winding (1) and the 2nd coiling portion (12) of coiling secondary winding (2);
Auxiliary bobbin (9), itself and bobbin (10) walk abreast and disposed adjacent;
The 1st iron core (6) and the 2nd iron core (7), itself and bobbin (10) and auxiliary bobbin (9) disposed adjacent and when electric current is flowed through elementary winding (1) and secondary winding (2), form magnetic circuit;
Supporter (5), it has a plurality of terminals (15) that are connected with substrate.
As shown in Figure 3, the 1st coiling portion (11) and the 2nd coiling portion (12) are the have pair of openings tubular of (10a); Have flange (4), it is formed between the 1st coiling portion (11) and the 2nd coiling portion (12); A pair of flange part (13), it is positioned at the two ends of bobbin (10).As the illustrative transformer of present embodiment, as Figure 1 and Figure 2, by be configured to the two ends of the 2nd coiling portion (12) of the few secondary winding of the coiling number of turns (2) afterwards in the 1st coiling portion (11) of axially going up the many elementary windings (1) of the separation coiling number of turns of bobbin (10).Elementary winding (1) and secondary winding (2) are the center through flange (4) alternate configurations with the 2nd coiling portion (12), dispose the 1st coiling portion (11) in the outside of the 2nd coiling portion (12) with released state.Auxiliary bobbin (9) is identical with bobbin (10), forms the tubular with pair of openings (9a), and two ends have flange part (14).Reeling on the auxiliary bobbin (9) and be different from the secondary winding (not shown) that bobbin (10) is gone up the secondary winding (2) of reeling.
Bobbin (10) is arranged on the surface (5c) of supporter (5), tabular portion that is provided with (13a) that forms on the bottom of flange part (13) and supporter 5 butts.The 1st coiling portion (11), the 2nd coiling portion (12), flange (4) and the available synthetic resin of flange part (13) of formation bobbin (10) and so on monolithic molding.The 1st iron core (6) and the 2nd iron core (7) are set at the EE iron core shape that forms with ferrite and so on.The 1st iron core (6) and the 2nd iron core (7) have respectively from the at right angles outstanding main leg (6a, 7a) of the cardinal principle central part of main body (6d, 7d); End court and the outstanding excitatory pin (6b, 7b) of the same direction of main leg (6a, 7a) by main body (6d, 7d); Other end court and the outstanding saturated leg (6c, 7c) of the same direction of main leg (6a, 7a) by main body (6d, 7d).Main leg (6a, 7a) is configured in the cavity of bobbin (10), and saturated leg (6c, 7c) is configured in the cavity of auxiliary bobbin (9).The configuration that contacts with each other of excitatory pin of the 1st iron core (6) and the 2nd iron core (7) (6b, 7b) and saturated leg (6c, 7c) end is between the main leg (6a, 7a), with the distance configuration at the interval that forms specified gap.Saturated leg (6c, 7c) is with respect to main leg (6a, 7a) and saturated leg (6c, 7c), is its area of section and reduces shape, so that be saturable with the magnetic line of force seldom.Corresponding with it, excitatory pin (6b, 7b) then is the area of section and increases shape, even very macro-energy can be unsaturated yet so that stored.The 1st iron core (6) and the 2nd iron core (7) also can use the EI iron core to wait the iron core of other shape.
Supporter (5) is identical with bobbin (10), and available synthetic resin and so on monolithic molding is the square frame shape of central zone cavity (16).Supporter (5) forms concave panel (17) on the part on surface (5c), be coupled to by the portion that is provided with (13a) that makes bobbin 10 among the concave panel (17) of supporter (5), can carry out the location the when surface (5c) that bobbin (10) is carried to supporter (5) gone up.Terminal (15) has the 1st terminal (15a) that connects elementary winding (1), and the 2nd terminal (15b) that connects secondary winding (2), according to transformer or specification that the substrate of transformer is installed, determines its number and configuration.The 1st terminal (15a) is from (5) sides of supporter (5a) outwards outstanding shape, and the 2nd terminal (15b) is the shape of outwards giving prominence to towards the direction opposite with the 1st terminal (15a) from another side (5b) of supporter (5).Among transformer shown in Figure 1, respectively there are eight the 1st terminals (15a) and the 2nd terminal (15b) to be the shape that outwards give prominence to the side (5a, 5b) from supporter (5).The lead-out wire (1a) at elementary winding (1) two ends of arranged spaced connects with different the 1st terminal (15a) respectively, and the lead-out wire (2a) at the two ends of secondary winding (2) connects with different the 2nd terminal (15b) respectively.Each terminal (15) is L-shaped, and is outstanding from the side (5a, 5b) of supporter (5) with a side end as shown in Figure 3, and the opposing party's end remains on the supporter (5) with outstanding state from the bottom surface (5d) of supporter (5).The lead-out wire of elementary winding (1) and secondary winding (2) (1a, 2a) is connected with a side's of the terminal of outwards giving prominence to from the side (5a, 5b) of supporter (5) (15) end, and the opposing party's of the terminal of outwards giving prominence to from the bottom surface (5d) of supporter (5) (15) end is connected with substrate.In addition, the lead-out wire (1a, 2a) of elementary winding (1) and inferior wire-wound group (2) is as Figure 1 and Figure 2, and the last slot part (5e) that forms in bottom surface (5d) that passes supporter (5) is connected with the 1st terminal (15a) and the 2nd terminal (15b) respectively.Though not shown, be wound on other secondary winding on the auxiliary bobbin (9), the lead-out wire at its two ends passes slot part (5e) afterwards, connects with other the 2nd terminal (15b) that is different from the 2nd terminal (15b) that secondary winding (2) is connected respectively.
Among used transformer, hold secondary winding or hold under the situation of elementary winding construction when adopting by the secondary winding pincers by elementary winding pincers, because being wound on the lead-out wire of the winding in the coiling portion of central authorities need be by on any one party in the winding of both sides, thereby be difficult to fully to guarantee space length and leakage distance between elementary winding and the secondary winding.Yet, the transformer of present embodiment, be set at outstanding in the opposite direction respectively formation owing to will connect the 1st terminal (15a) of elementary winding (1) with the 2nd terminal (15b) that is connected secondary winding (2), thereby can fully guarantee space and leakage distance between elementary winding (1) and the secondary winding (2).In addition, also needn't can realize the miniaturization of transformer as the existing height that with mode, increases flange (4) for the space between acquisition elementary winding (1) and the secondary winding (2) and leakage distance.
In addition, among illustrative transformer, disposed the protective cover (8) of encirclement bobbin (10) surface and side.Protective cover (8) is available to be formed with bobbin (10) identical materials, as shown in Figure 2, has projection (8a) at its back side, and it can insert among the groove (4a) that forms on the surface of flange (4) of bobbin (10).Between the groove (4a) of the projection (8a) of protective cover (8) and the flange (4) of bobbin (10), separated from one another across the interval of regulation.Can make elementary winding (1) and the reliable insulation of secondary winding (2) by the leakage distance that prolongs elementary winding (1) and secondary winding (2).In addition, elementary winding (1) and secondary winding (2) are more close owing to making, thereby can make transformer miniaturization more.
Though omitted elementary winding (1) and secondary winding (2) among the figure, but when the assembling transformer, as shown in Figure 3, at first prepare elementary winding (1) and secondary winding (2) and be wound on bobbin (10) in the 1st coiling portion (11) and the 2nd coiling portion (12) respectively.Then, protective cover (8) is installed afterwards, is surrounded bobbin (10) with protective cover (8) from the top of bobbin (10).By being cooperated, protective cover (8) is installed on the flange part (13) of bobbin (10), can protective cover (8) and bobbin (10) is fixing, but also available adhesive securement protective cover (8) and bobbin (10).When protective cover (8) being installed to bobbin (10) when going up, the projection (8a) on protective cover (8) back side can be inserted in the groove (4a) of flange (4) of bobbin (10).Protective cover (8) is gone up and is formed the opening (8b) consistent with the opening (10a) of bobbin (10); after the main leg of the 1st iron core (6) and the 2nd iron core (7) (6a, 7a) passes the opening (8b) of protective cover (8), insert the inside of bobbin (10) from the opening (10a) of bobbin (10).In addition, the saturated leg (6c, 7c) of the 1st iron core (6) and the 2nd iron core (7) inserts the inside of auxiliary bobbin (9) from the opening (9a) of auxiliary bobbin (9).At this moment the bonding agent of available epoxy and so on is fixed between the end of the excitatory pin (6b, 7b) of the 1st iron core (6) and the 2nd iron core (7) and saturated leg (6c, 7c) and between the inner peripheral surface of the outer peripheral face of main leg (6a, 7a) and bobbin (10).Main leg (6a, 7a) with the end separating state configuration in bobbin (10).
Then, prepare supporter (5), the flange part (13) of bobbin (10) is gone up surface (5c) that the portion that is provided with (13a) that forms is coupled to supporter (5) go up among the concave panel (17) that forms.Bottom surface and the flange part (14) of auxiliary bobbin (9) and surface (5c) butt of supporter (5) by making protective cover (8), the 1st iron core (6) and the 2nd iron core (7) arrive each component configuration on the supporter (5).Though not shown, the bobbin (10) and the supporter 5 of protective cover (8) have been installed can have been fixed by coiling insulating tape on side face.After bobbin (10) and supporter (5) is fixing, the elementary winding (1) of bobbin (10) and the lead-out wire (1a, 2a) of secondary winding (2) are connected on the 1st terminal (15a) and the 2nd terminal (15b) of supporter (5) with scolding tin.Yet also can be before at fixedly bobbin (10) and supporter (5), the lead-out wire (1a, 2a) of elementary winding (1) and secondary winding (2) is connected on the 1st terminal (15a) and the 2nd terminal (15b).In addition, other secondary winding that is wound on the auxiliary bobbin (9) is identical with the secondary winding (2) of bobbin (10), and available scolding tin is connected to lead-out wire on the 2nd terminal (15b).Can form transformer by above-mentioned operation, but also can there be other various methodologies in the manufacturing process of transformer, above-mentioned operation is an example wherein only.Especially between the 1st iron core (6) and the 2nd iron core (7), and between the 1st iron core (6) and the 2nd iron core (7) and the bobbin (10), owing to form the thermal expansion ratio difference of the material of each parts, on each parts crackle takes place sometimes.Therefore, the adhering method of each parts preferably suitably changes according to the specification of transformer.
Transformer is connected with not shown substrate at a plurality of terminals (15), and during the switch connection of supply unit, electric current promptly flows in elementary winding (1) and secondary winding (2).Main leg (6a, 7a), excitatory pin (6b, 7b) and saturated leg (6c, 7c) are excitatory by elementary winding (1) and secondary winding (2), and energy is stored among the 1st iron core (6) and the 2nd iron core (7).Main leg (6a, 7a) is gone up the magnetic line of force that produces and is passed through excitatory pin (6b, 7b) and saturated leg (6c, 7c).Switch one disconnects, and energy stored promptly is released in the 1st iron core (6) and the 2nd iron core (7), produces output voltage on transformer.Be wound on other secondary winding on the auxiliary bobbin (9) when transformer action, produce output voltage with the secondary winding (2) of bobbin (10).
By changing the distance between the 1st iron core (6) and the 2nd iron core (7), can adjust or control the inductance value of elementary winding (1) and secondary winding (2).Transformer is according to the magnetic flux density of the 1st iron core (6) and the 2nd iron core (7), determine the area of section of the 1st iron core (6) and the 2nd iron core (7) and the number of turns of elementary winding (1), spacing between the main leg (6a) that can be by adjusting the 1st iron core (6) and the main leg (7a) of the 2nd iron core (7), the adjustment inductance.Corresponding with it, the number of turns of secondary coil (2) can be selected the regulation number of turns by the input voltage of transformer and output voltage decision.The coiling direction of elementary winding (1) and secondary winding (2) can suitably determine according to the specification of transformer.
The value of leakage inductance depends on distance and the relative area between the primary coil (1) of coiling and the width of secondary coil (2), elementary winding (1) and the secondary winding (2), but among the present invention, the ratio of the elementary winding (1) by changing configured separate and the number of turns of secondary winding (2), the relative area between elementary winding (1) and the secondary winding (2) can be changed, the leakage inductance value of elementary winding (1) and secondary winding (2) can be adjusted or control.Owing to do not change the width of elementary winding (1) and secondary winding (2) and the distance between elementary winding (1) and the secondary winding (2), therefore needn't change the interval of flange (4) or flange part 13, promptly available same bobbin (10) forms the transformer with different leakage inductance values.That is to say that the present invention need not can form multiple transformer by changing the shape that mould changes bobbin (10).The relative area of the value of leakage inductance between elementary winding (1) and secondary winding (2), minimum when promptly the thickness of elementary winding (1) of Juan Raoing and secondary winding (2) equates.For example, if the number of turns of elementary winding (1) is set at 50 circles, want leakage inductance value with elementary winding (1) and secondary winding (2) and be set at hour, the 50 circle elementary windings (1) of can reeling respectively in the 1st coiling portion (11) of configured separate are connected in parallel after making the phase place unanimity.In addition, another kind of method is to be connected in series after the 25 elementary windings of circle (1) of reeling respectively in the 1st coiling portion (11) of configured separate make the phase place unanimity.
Secondly, when wanting to make the leakage inductance value increase of elementary winding (1) and secondary winding (2), two elementary windings (1) of configured separate can be changed into the different number of turns.Particularly, can be set at 20 circles and 30 by the number of turns and enclose, be connected in series after making the phase place unanimity two elementary windings (1).When wanting to make the leakage inductance value of elementary winding (1) and secondary winding (2) further to increase, can be set at 10 circles and 40 by the number of turns and enclose, be connected in series after making the phase place unanimity two elementary windings (1).When wanting to make the leakage inductance value of elementary winding (1) and secondary winding (2) to be increased to maximum, enclose and to accomplish as long as the number of turns of two elementary windings (1) is set at 0 circle and 50.
Fig. 4 (a) and (b) have been to use the sketch of transformer of the present embodiment of the bobbin (10) with three coiling portions of cutting apart (11,12), and the curve chart of representing elementary winding (1) and the variation of the leakage inductance value of secondary winding (2).Relation between the leakage inductance value (μ H) of the number of turns percentage of two the elementary windings (1) that are connected in series after the graphical representation of Fig. 4 (b) is cut apart and elementary winding (1) and secondary winding (2).Indicate elementary winding (1) with P among the figure, indicate secondary winding (2), indicate auxiliary winding described later (18) with A with S.Whole number of turns of elementary winding (1) as 100%, are changed the 1st elementary winding P1 of the elementary winding (1) after cutting apart and the number of turns of the 2nd elementary winding P2.If make the number of turns of the 1st elementary winding P1 be increased to half gradually near whole number of turns of elementary winding (1), then the leakage inductance value descends, if by continuing to increase the number of turns of the 1st elementary winding P1, make it to take a turn for the worse with the number of turns of the 2nd elementary winding P2, then the leakage inductance value rises once more.Be a half of the number of turns of elementary winding (1) when the number of turns of the 1st elementary winding P1 and the 2nd elementary winding P2, the leakage inductance value becomes minimum L1, hence one can see that, and the ratio of the number of turns by changing the 1st elementary winding P1 and the 2nd elementary winding P2 can make the value of leakage inductance become big.As mentioned above, the ratio of the number of turns by changing elementary winding (1) can be adjusted to desirable value with the leakage inductance value of elementary winding (1) and secondary winding (2).
The present invention has been not limited to use has the three above-mentioned transformers of cutting apart the bobbin (10) of coiling portion (11,12), also can use to have more that multireel forms transformer around the bobbin (10) of portion (11,12).Fig. 5～Fig. 8 example illustrates other execution mode of the present invention.
Fig. 5 (a) and (b) have been to use the sketch of the transformer of the bobbin (10) with four coiling portions of cutting apart (11,12), and the curve chart of variation of representing the leakage inductance value of elementary winding (1) and secondary winding (2).Elementary winding (1) is divided into two with secondary winding (2), each other alternate configurations.The relation of the leakage inductance value (μ H) of the elementary winding of graphical representation (1) number of turns percentage of Fig. 5 (b) and elementary winding (1) and secondary winding (2).The number of turns ratio of secondary winding (2) is made as fixing.Identical with transformer shown in Figure 4, if make the number of turns of the 1st elementary winding P1 be increased to half gradually near whole number of turns of elementary winding (1), then the leakage inductance value descends, if by continuing to increase the number of turns of the 1st elementary winding P1, make it to take a turn for the worse with the number of turns of the 2nd elementary winding P2, then the leakage inductance value rises once more.Yet because the 2nd elementary winding P2 and the 1st secondary winding S1 and the 2nd these two disposed adjacent of secondary winding S2, therefore, when the leakage inductance value was slightly more than the number of turns of the 1st elementary winding P1 in the number of turns of the 2nd elementary winding P2, the leakage inductance value became minimum L2.In addition, the secondary winding (2) that constitutes by the 1st secondary winding S1 and the 2nd secondary winding since relative area greater than transformer shown in Figure 4, therefore, the minimum value L2 of leakage inductance value is also littler than the minimum value L1 of the leakage inductance value of transformer shown in Figure 4.
Fig. 6 has represented to use the sketch of the transformer of the bobbin (10) with five coiling portions of cutting apart (11,12).By elementary winding (1) is divided into three, secondary winding (2) is divided into two, each other alternate configurations.Though omitted diagram, but when being made as the number of turns ratio of two secondary winding (2) fixedly, with the 1st elementary winding P1, the 2nd elementary winding P2 of elementary winding (1), when the 3rd elementary winding P3 forms the same number of turns, elementary winding (1) becomes minimum value with the leakage inductance value of secondary winding (2).Yet, under the situation of elementary winding (1) that is connected in series, but because the number of turns ratio of the elementary winding of appropriate change (1), with the 1st elementary winding P1, when the 3rd elementary winding P3 forms the same number of turns, when the number of turns that the 2nd elementary winding P2 is formed during more than the 1st elementary winding P1 and the 3rd elementary winding P3, elementary winding (1) becomes minimum value with the leakage inductance value of secondary winding (2).In addition, because transformer shown in Figure 6 is compared with transformer shown in Figure 5, relative area further increases, so the minimum value of the leakage inductance of transformer is also littler than the minimum value of the leakage inductance of transformer shown in Figure 5.
Fig. 7 and Fig. 8 are illustrated in the transformer of auxiliary winding (18) of having reeled on the bobbin (10).Transformer shown in Figure 7 has appended auxiliary winding (18) between the 2nd elementary winding P2 of secondary winding (2) and elementary winding (1).Among this transformer, when comparing with the number of turns of the 2nd elementary winding P2, because the number of turns of the 1st elementary winding P1 of the close configuration of secondary winding (2) for a long time, the leakage inductance value becomes minimum value.Transformer shown in Figure 8 is adjacent with the 2nd elementary winding P2 of elementary winding (1), and an opposite side with secondary winding (2) is appended auxiliary winding (18).Among this transformer, even append auxiliary winding (18), because the 1st elementary winding P1 and the distance between the 2nd elementary winding P2 and the secondary winding (2) of elementary winding (1) are identical with transformer shown in Figure 4, thereby have the characteristic identical with transformer shown in Figure 4.
In addition, the present invention also can carry out all changes.For example among above-mentioned transformer, it is the output voltage of the transformer situation when being lower than input voltage, but the output voltage at transformer is higher than under the situation of input voltage, also can put upside down, with the two ends of secondary winding (2) configured separate to elementary winding (1) by the winding position that makes elementary winding (1) and secondary winding (2).In these cases, especially at the output voltage height of transformer, and under the many situation of the number of turns of secondary winding (2), can adjust the leakage inductance value of elementary winding (1) and secondary winding (2) well.
If adopt power transformation device of the present invention, owing to, can adjust the leakage inductance value, thereby can be easy to change the value of leakage inductance according to the purposes of transformer by the elementary winding (1) of change configured separate or the number of turns ratio of secondary winding (2).Just because of this, needn't change the shape of bobbin (10) and flange (4) as before, just can obtain best leakage inductance value, can produce low cost, high performance transformer.
The present invention can be applicable to well voltage resonance formula Switching Power Supply, current resonance formula Switching Power Supply or with the resonance type switching powers such as particular resonance formula Switching Power Supply of a part of resonance of switch motion waveform in the transformer that uses.
Claims (5)
1, a kind of transformer is characterized in that, comprising: elementary winding and secondary winding; And bobbin, it has reel the 1st coiling portion of above-mentioned elementary winding and the 2nd coiling portion of the above-mentioned secondary group of level of reeling,
Above-mentioned the 1st coiling portion and the 2nd coiling portion the two or wherein any one party configured separate on the axis direction of bobbin is a plurality of,
By the aforementioned elementary winding of change configured separate or the number of turns ratio of secondary winding, adjust the leakage inductance value of elementary winding and secondary winding.
2, transformer according to claim 1 is characterized in that: aforementioned the 1st coiling portion and the 2nd coiling portion form the tubular with pair of openings; Disposed the 1st unshakable in one's determination and the 2nd iron core, it inserts aforementioned pair of openings, and forms magnetic circuit when electric current is flowed through aforementioned elementary winding and secondary winding; By changing the distance between aforementioned the 1st iron core and aforementioned the 2nd iron core, adjust the leakage inductance value of aforementioned elementary winding and aforementioned secondary winding.
3, transformer according to claim 1 and 2 is characterized in that: aforementioned the 1st coiling portion separates with the 2nd a coiling portion number of turns side's how winding, is configured to the two ends of the few the opposing party's winding of the number of turns;
By the aforementioned elementary winding of change configured separate or the number of turns ratio of secondary winding, adjust the leakage inductance of aforementioned elementary winding and aforementioned secondary winding.
4, transformer according to claim 1 and 2 is characterized in that: comprise supporter, it has a plurality of terminals that are connected with substrate;
Before or after fixing aforementioned bobbin and the aforementioned supporter, aforementioned elementary winding and secondary winding are connected with the terminal of aforementioned supporter.
5, transformer according to claim 4 is characterized in that: aforementioned terminal comprises the 1st terminal that connects aforementioned elementary winding, and the 2nd terminal that connects aforementioned secondary winding;
Aforementioned the 1st terminal is from the outwards outstanding formation in a side of aforementioned supporter.
Aforementioned the 2nd terminal is the another side court and the outstanding formation of aforementioned the 1st terminal rightabout from aforementioned supporter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005103952A JP2006286880A (en) | 2005-03-31 | 2005-03-31 | Transformer |
| JP2005103952 | 2005-03-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1841584A true CN1841584A (en) | 2006-10-04 |
| CN100495599C CN100495599C (en) | 2009-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100678458A Expired - Fee Related CN100495599C (en) | 2005-03-31 | 2006-03-14 | Transformer |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2006286880A (en) |
| KR (1) | KR100791727B1 (en) |
| CN (1) | CN100495599C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950656A (en) * | 2010-08-24 | 2011-01-19 | 合肥华耀电子工业有限公司 | Method for winding coils of high-frequency resonance transformer |
| CN102496442A (en) * | 2006-12-20 | 2012-06-13 | 普利莫宗产品公司 | High-voltage transformer |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100798448B1 (en) * | 2007-03-16 | 2008-01-28 | 주식회사 코일마스터 | Inductor to improve current characteristics |
| JP6179103B2 (en) * | 2013-01-18 | 2017-08-16 | Tdk株式会社 | Resonant transformer |
| CN104700992B (en) * | 2013-12-10 | 2017-02-15 | 深圳麦格米特电气股份有限公司 | Transformer |
| JP6804324B2 (en) * | 2017-02-09 | 2020-12-23 | パワーサプライテクノロジー株式会社 | Transformers and automobiles, electronic devices, and color copiers equipped with them |
| CN108831708A (en) * | 2018-07-31 | 2018-11-16 | 遂宁普思电子有限公司 | integrated LLC transformer |
| FR3098002B1 (en) * | 2019-06-27 | 2021-07-16 | Valeo Siemens Eautomotive France Sas | Electrical transformer with controlled leakage inductance distribution |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4591819A (en) * | 1985-03-28 | 1986-05-27 | Rca Corporation | Inductance adjustment for transformers |
| JP3130200B2 (en) * | 1994-04-12 | 2001-01-31 | 松下電器産業株式会社 | Trance |
-
2005
- 2005-03-31 JP JP2005103952A patent/JP2006286880A/en active Pending
-
2006
- 2006-03-14 CN CNB2006100678458A patent/CN100495599C/en not_active Expired - Fee Related
- 2006-03-28 KR KR1020060027896A patent/KR100791727B1/en not_active IP Right Cessation
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496442A (en) * | 2006-12-20 | 2012-06-13 | 普利莫宗产品公司 | High-voltage transformer |
| CN102496442B (en) * | 2006-12-20 | 2015-04-01 | 普利莫宗产品公司 | High-voltage transformer |
| US9126832B2 (en) | 2006-12-20 | 2015-09-08 | Primozone Production Ab | Power supply apparatus for a capacitive load |
| CN101950656A (en) * | 2010-08-24 | 2011-01-19 | 合肥华耀电子工业有限公司 | Method for winding coils of high-frequency resonance transformer |
| CN101950656B (en) * | 2010-08-24 | 2012-01-04 | 合肥华耀电子工业有限公司 | Method for winding coils of high-frequency resonance transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100791727B1 (en) | 2008-01-03 |
| JP2006286880A (en) | 2006-10-19 |
| KR20060106718A (en) | 2006-10-12 |
| CN100495599C (en) | 2009-06-03 |
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