CN1319238A - Planar transformer - Google Patents
Planar transformer Download PDFInfo
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- CN1319238A CN1319238A CN99811122A CN99811122A CN1319238A CN 1319238 A CN1319238 A CN 1319238A CN 99811122 A CN99811122 A CN 99811122A CN 99811122 A CN99811122 A CN 99811122A CN 1319238 A CN1319238 A CN 1319238A
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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
- H01F27/2804—Printed windings
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
- H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors
Abstract
A planar transformer is provided which includes an E-shaped core with a central leg and spaced adjacent legs, a primary winding, and first and second secondary tracks. The primary winding is defined on a primary layer through which the central leg of the core extends. The first secondary track is defined on a first secondary layer, the first secondary track comprising a plurality of serially interconnected segments each defining a secondary winding which comprises a partial turn configured to provide a predefined low output voltage of the transformer. The second secondary track is defined on a second secondary layer, the second secondary track being arranged in mirror image fashion relative to the first secondary track. The secondary track may define an end region operatively subject to leakage inductance from an adjacent leg of the core to reduce the voltage in a secondary leg in an inductive manner.
Description
The present invention relates to a kind of flat surface transformer.It also relates to a kind of method and a kind of power supply that comprises the electric device of this flat surface transformer of balancing plane transformer core.
Flat surface transformer commonly used generally comprises FERRITE CORE, and this magnetic core has the interval iron stem of several winding layers of extend through, and an elementary winding is arranged on the winding layers so that different output voltages to be provided with several secondary winding.Usually, for the different output voltages of enough electric currents are provided, secondary winding is arranged on the different winding layers, has therefore just increased the physical size of transformer.Purpose of the present invention just provides a kind of technical scheme that addresses this problem.
According to the invention provides a kind of flat surface transformer, it comprises:
One iron core;
One elementary winding, it is arranged on the elementary winding layers of magnetic core extend through;
One first level magnetic track (track), it is arranged on first level winding layers, and this first level magnetic track comprises several segmentations of connecting mutually of every paragraph qualification secondary winding; With
One second subprime magnetic track, it is arranged on the second subprime winding layers, and this second subprime magnetic track is provided with respect to first level magnetic track mode with mirror image.
Usually, each in first and second magnetic tracks of each half cycle and the coupling of magnetic flux are unbalanced.Yet because magnetic track is provided with in the mirror image mode, the magnetic flux coupling in full week is a balance.Equally, in certain embodiments, the magnetic flux of at least some segmentations of first and second magnetic tracks of each half cycle coupling may be uneven, but just may balance during full week.In addition, should be understood that first the level magnetic track that is provided with in the mirror image mode with respect to the second subprime magnetic track can form the part of the longer magnetic track that comprises other contact etc.
In addition, according to the invention provides a kind of flat surface transformer, it comprises:
One E core, it has the central core limb core limb adjacent with a plurality of interval;
One elementary winding, it is arranged on the elementary winding layers of central core limb extend through unshakable in one's determination;
One first level magnetic track, it is arranged on first level winding layers, this first level magnetic track comprises several segmentations of connecting mutually of every paragraph qualification secondary winding, and this secondary winding comprises branch circle coil (partial turn), and its structure is arranged to provide transformer one predetermined low output voltage;
One second subprime magnetic track, it is arranged on the second subprime winding layers, and this second subprime magnetic track is provided with respect to first level magnetic track mode with mirror image; With
Several contacts, at least one group of predetermined low output voltage picks out from these contacts branches.
The first and second secondary winding layers can be integrally formed, and for example, they can be arranged on the magnetic track on the opposite face of double-sided printed-circuit board.On the contrary, the first and second secondary winding layers can be limited by the printed circuit board (PCB) of two separation.Should be understood that magnetic track can be with any other technology, for example thin or thick membrane technology etc. is limited on the winding layers.
This transformer can comprise several first and second level magnetic tracks.Usually, Xiang Guan first and second level magnetic tracks are arranged on the opposite face of printed circuit board (PCB).This transformer also comprises several printed circuit board (PCB)s of extend through unshakable in one's determination.Several first level magnetic track and several second subprime magnetic tracks can be connected mutually.In certain embodiments of the present invention, this transformer is arranged to and can be upgraded.Therefore, can increase other printed circuit board (PCB) to strengthen the capacity disposal ability of this transformer.
Normally ferrite core with E type unshakable in one's determination, elementary winding and secondary magnetic track extend around the central core limb of E core usually.This transformer can comprise the elementary winding of several serial or parallel connection structures, and these windings can provide one or more sources of magnetic flux that are coupled with secondary winding.
In order to improve the current carrying capacity of segmentation, this transformer can comprise the surface mount board that is installed in these segmentations, for example copper coin.Can be provided with fin to strengthen radiating effect.
In addition, according to the invention provides a kind of flat surface transformer, it comprises:
One iron core, it comprises the core limb that a central core limb is adjacent with at least one interval;
A level magnetic track, it is formed by several segmentations that limit secondary winding, and this secondary magnetic track that limits a petiolarea can stand the leakage inductance of this adjacent core limb effectively, can reduce reactive voltage on the secondary core limb with this.
This transformer can comprise an elementary winding, and this elementary winding is arranged on the elementary winding layers of extend through unshakable in one's determination, and this secondary magnetic track comprises:
One first level magnetic track, it is arranged on first level winding layers, and this first level magnetic track comprises several segmentations of connecting mutually of a level winding of every paragraph qualification;
One second subprime magnetic track, it is arranged on the second subprime winding layers, and this second subprime magnetic track is provided with respect to first level magnetic track mode with mirror image;
According to the invention provides a kind of method that reduces the reactive voltage on the secondary magnetic track of flat surface transformer, this method comprises the petiolarea that secondary magnetic track is set again, so that it can stand leakage inductance unshakable in one's determination effectively.
Each segmentation of this secondary magnetic track can be one fen circle coil around iron core at least, normally around one fen circle coil of the central core limb of iron core, with this voltage tap from secondary magnetic track of selecting is in advance come out.Therefore, if iron core is an E core, will on the specific secondary winding layer between adjacent core limb of iron core and the central core limb unshakable in one's determination, be provided with many different segmentations, thereby causes transformer in this specific current potential imbalance.Yet, because first and second level magnetic tracks are provided with in the mirror image mode, when the magnetic track total quantity between each adjacent core limb and the central core limb be balance the time, transformer is a balance in full week.
Therefore, in addition according to the present invention, provide a kind of method of balancing plane transformer core, this method comprises:
One flat surface transformer is provided, it comprises the level magnetic track first and second times, first and second level magnetic tracks comprise that respectively several limit the segmentation of the mutual series connection of first and second secondary winding, and each comprises a branch circle coil around transformer core at least in first and second secondary winding; With
First and second level magnetic tracks are that the mode with mirror image is provided with each other, with this can balancing transformer iron core.
This method comprises synchro switch, can use the ordinary tap circuit between the corresponding segment that is arranged on first and second magnetic tracks.Therefore, corresponding segmentation can respectively limit the auxiliary winding of level one time, and secondary auxiliary winding accumulation provides the output voltage of selecting in advance.
According to the present invention, provide a kind of power supply of electric device again, this power supply comprises:
One flat surface transformer mentioned above; And switching circuit, be connected with the selected segmentation of transformer, be used for providing output voltage selectively from corresponding segmentation.
First and second magnetic tracks are spiral type normally, preferably the copper magnetic track form of printed circuit board (PCB).The profile of each segmentation of magnetic track is rectangle normally.As mentioned above, these segmentations are connected mutually to limit first and second secondary winding, preferably increase these segmentations from the center of spiral type the width to the periphery of spiral type.
This transformer can comprise the contact on several opposed ends that are arranged on selected segmentation.Therefore, this method can comprise use switching circuit from first with the corresponding segment of secondary magnetic track on divide synchronously and pick out several different voltage.
In order to strengthen the current carrying capacity of each segmentation relevant with a specific output voltage, the width of each segmentation should be increased, and this width in turn defines the central core limb that is arranged on specific iron core and the quantity of the segmentation between the adjacent core limb.
Now, with reference to the signal accompanying drawing, the present invention is described by embodiment.
In the accompanying drawings,
Fig. 1 represents the decomposition diagram according to flat surface transformer part of the present invention;
Fig. 2 represents according to the cross section of another embodiment of flat surface transformer of the present invention part diagrammatic sketch roughly;
The equivalent circuit diagram of Fig. 3 presentation graphs 2 transformers;
Fig. 4 represents the top plan view according to another embodiment of flat surface transformer of the present invention;
The plane upwarding cutaway view of Fig. 5 presentation graphs 4 transformers;
Fig. 6 represents the equivalent circuit diagram of Figure 4 and 5 flat surface transformer;
Fig. 7 represents the plane vertical view cutaway drawing according to the another embodiment of flat surface transformer of the present invention;
The plane upwarding cutaway view of Fig. 8 presentation graphs 7 transformers;
The equivalent circuit diagram of Fig. 9 presentation graphs 7 and 8 transformers;
Figure 10 represents according to the present invention, comprises the plane vertical view cutaway drawing of the flat surface transformer of leakage inductance;
Figure 11 represents the plane upwarding cutaway view of Figure 10 transformer;
Figure 12 represents according to the present invention, comprises the plane vertical view cutaway drawing of another embodiment of flat surface transformer of leakage inductance;
Figure 13 represents the plane upwarding cutaway view of Figure 12 transformer.
With reference to the accompanying drawings, reference number 10 ordinary representations are according to flat surface transformer part of the present invention.Transformer 10 comprises top and bottom ferrite core parts 12,14 respectively, and their limit and to comprise central core limb 16.1 and adjacent at interval core limb 16.2 and 16.3 transformer core.Transformer 10 comprises the elementary winding layers that is provided with elementary winding (not shown), the elementary winding of central core limb 16.1 extend throughs unshakable in one's determination; Be etched in first level magnetic track 18 on printed circuit (PC) plate 20 upper surfaces; Be etched in second subprime magnetic track (not shown) on PC plate 20 lower surfaces with mode with mirror image.Magnetic track 18 limits a segmentation of extending to limit the secondary winding of a half turn between core limb 16.1 and 16.2.The voltage of this segmentation is the maximum common value of other voltage of providing of other secondary winding that is arranged on the transformer 10, will describe in detail below.Transformer 10 is connected with switching circuit (not shown), this switching circuit between magnetic track 18 and its are arranged on mirror image on PC plate 20 lower surfaces, carry out selectively switch with to electronic installation for example PC etc. several output voltages are provided.
At length with reference to the accompanying drawings 2 and 3, another embodiment of reference number 30 ordinary representations flat surface transformer according to the present invention.This transformer 30 comprises first and second iron cores 32,34 respectively, and each iron core comprises central core limb 32.1,34.1 and two core limbs 32.2,34.2 and 32.3,34.3 that the interval is adjacent respectively.The same with the situation of transformer 10, transformer 30 comprises the secondary magnetic track with segmentation 36.1 to 36.3, and each segmentation is passed between central core limb 32.1,34.1 and adjacent core limb 32.2,32.3 and 34.3 individually separately. Contact 38,40,42,44,46 is set picks out different voltage from segmentation 36.1 to 36.3, to divide selectively with 48.Magnetic track is etched on the PC plate (not shown) in mode commonly used, and the back side of PC plate comprises it being the same track of mirror image mutually.And the same with the situation of transformer 10, each segmentation 36.1 limits the maximum common value of the output voltage that is obtained from transformer 30, these segmentations (see figure 3) of connecting mutually.
At length with reference to the accompanying drawings 4 to 6, reference number 50 ordinary representations are according to another embodiment of the flat surface transformer according to the present invention.The same with flat surface transformer 10 and 30, this transformer 50 comprises (not shown) the elementary winding that is arranged on the elementary winding layers, the elementary winding layers of central core limb 52.1 extend throughs unshakable in one's determination.This iron core comprises adjacent at interval core limb 52.2 and 52.3.Transformer 50 comprises level magnetic track 54 first time, and this secondary magnetic track is a copper magnetic track on first side 55 that is etched in the PC plate 56 that limits first level winding layers.Opposite second side 60 of PC plate 56 comprises a second subprime magnetic track 58, and this secondary magnetic track 58 also is a copper magnetic track that is etched on the PC plate 56.
First time level magnetic track 54 comprises several copper segmentations of connecting mutually 62.1,64.1,66.1,68.1,70.1,72.1 and 74.1.Second subprime magnetic track 58 comprises corresponding copper segmentation 62.2,64.2,66.2,68.2,70.2,72.2 and 74.2, and they are mirror images of first level magnetic track 54.Each segmentation 62.1 to 74.1 and 62.2 to 74.2 parts by the magnetic track that extends between central core limb 52.1 and adjacent core limb 52.2,52.3 limit.As shown in Figure 4, four segmentations, the i.e. segmentation 62.1 of first level magnetic track 54,66.1,70.1 and 74.1 pass between adjacent core limb 52.2 and central core limb 52.1, three relative therewith segmentations, i.e. segmentation 64.1,68.1 and 72.1 is passed between adjacent core limb 52.3 and central core limb 52.1.Therefore, be arranged on the imbalance that first segmentation 62.1 to 74.1 on the level magnetic track 54 will cause transformer.Yet, owing to be arranged on the mirror image of the second subprime magnetic track 58 on PC plate 56 back sides, and four segmentations, i.e. segmentation 62.2,66.2,70.2 and 74.2 is passed between central core limb 52.1 and adjacent core limb 52.3.First and second level magnetic tracks 54 and 58 (see figure 6) that is connected with switching circuit, thus this switching circuit can divide selectively from different segmentation 62.1 to 74.1 and 62.2 to 74.2 and picks out the balance that voltage causes transformer in complete all processes.
Segmentation 62.1 has a contact 76.1 that is connected with the contact 76.2 of segmentation 62.2, this contact ground connection (see figure 6).Segmentation 62.1 connects magnetic track 80.1 through copper and is connected with segmentation 64.1, and segmentation 64.1 in turn has a contact 82.1 that is connected with the contact 84 of switching circuit.Contact 82.1 connects magnetic track 86.1 through copper and is connected with segmentation 66.1, and segmentation 66.1 is connected with other contact 90 (see figure 6)s of switching circuit through contact 88.1.Contact 88.1 connects magnetic track 92.1 through copper and is connected with segmentation 68.1, segmentation 68.1 connects magnetic track 94.1 through copper and is in series with segmentation 70.1, segmentation 70.1 in turn is connected with segmentation 72.1 through copper magnetic track 96.1, at last, be connected with segmentation 74.1 through copper magnetic track 98.1, the contact 100.1 of segmentation 74.1 is connected with the contact 102 of switching circuit.Therefore, segmentation 62.1 to 74.1 limits seven secondary auxiliary windings, and each connects auxiliary winding mutually with the half turn form.Equally, segmentation 62.2 to 74.2 is connected mutually in the mode of mirror image.Power supply comes out by switching circuit tap from selected contact 82.1,82.2,88.1,88.2,100.1 and 100.2.
At length with reference to the accompanying drawings 7 to 9, the another embodiment of reference number 110 ordinary representations flat surface transformer according to the present invention.Flat surface transformer 110 is similar to transformer 30 (seeing Fig. 2 and 3), and therefore, unless other explanation is arranged, same reference numerals is used to represent same or analogous feature.
Transformer 110 comprises first and second ferrite core 32,34, and each iron core comprises central core limb 32.1,34.1 and adjacent at interval core limb 32.2,32.3 and 34.2,34.3 respectively.Transformer 110 comprises and is etched on the PC plate (not shown) with the elementary winding of copper magnetic track form, these magnetic tracks are spiral types, holds central core limb 32.1 and 34.1 to produce many sources of magnetic flux.Transformer 110 also comprise first the level magnetic track 54 that is etched in the copper magnetic track form on PC plate (not shown) first aspect and be etched in PC backboard face or second fen aspect on secondary magnetic track 58.With transformer 10,30,50 situation is the same, and transformer 110 has first and second level magnetic tracks 54,58 that are provided with in the mirror image mode, therefore can balancing transformer 110.And with transformer 10,30,50 situation is the same, first level magnetic track 54 of transformer 110 comprises seven voltage segmentations 62.1,64.1,66.1,68.1,70.1,72.1 and 74.1.Equally, second subprime magnetic track 58 comprises seven voltage segmentations 62.2,64.2,66.2,68.2,70.2,72.2 and 74.2, they be with the mirror image mode be arranged on the back side of PC plate.Different with the transformer 50 (seeing Fig. 4 to 6) that comprises single iron core, transformer 110 comprises two iron cores 32,34, therefore, at each central core limb 32.1,34.1 and sides adjacent core limb 32.2,32.3 the quantity of quantity of passing between 34.2 and 34.3 or segmentation 62 to 74 can reduce.Therefore, for standard-sized iron core, just can increase the thickness of segmentation 62.1 to 74.1 and 62.2 to 74.2, so compare with transformer 50, transformer 110 has higher current carrying capacity.
At length with reference to the accompanying drawings 10 to 13, other embodiment of reference number 120 and 130 ordinary representations flat surface transformer according to the present invention.Flat surface transformer 130,120 is similar with flat surface transformer 110 (seeing Fig. 7 to 8) to transformer 50 (seeing Fig. 4 to 6) respectively, and therefore, unless other explanation is arranged, same reference numerals is used to represent same or analogous feature.
In transformer 110, the segmentation 62.1 of first level magnetic track 54 and 74.1 is passed between the side core limb 32.2,34.2 of central core limb 32.1,34.1 and adjacent spaces.Mirror image segmentation 62.2 to 74.2 is passed between central core limb 32.1,34.1 and adjacent core limb 32.3,34.3.Yet, in transformer 120, the segmentation 72.1 of first level magnetic track 54 and 74.1 is not at central core limb 32.1,34.1 and adjacent core limb 32.2,34.2 between pass, but they outwards curve crank and pass outwards through adjacent core limb 32.3 and 34.3 so that segmentation 72.1 and 74.1 stands leakage inductance.Equally, the segmentation 72.2 and 74.2 of second subprime magnetic track 58 passes outwards through adjacent core limb 32.2 and 34.2.Be preferably used in soft switch topology with the relevant leakage inductance that stands by the segmentation 72.1,74.1,72.2,74.2 of transformer 120 with turn-to-turn capacitance between winding.Usually, elementary winding is placed on more than 120 layers of transformer, and turn-to-turn capacitance just adopts this layout when interwinding capacity produces producing between each magnetic track circle between winding layers.About this point, importantly understand: though the embodiment of the invention described above comprises one with the etched two-sided PC plate in mirror image mode two sides, but transformer 10,30,50,110,120 and 130 can be to comprise several PC plates, and secondary magnetic track and primary track are etched in the transformer of the multilayer form on the PC plate.
At length with reference to the accompanying drawings 12 and 13, transformer 130 comprises also and is separately positioned on first and second other segmentations 132.1 and 132.2 on the level magnetic track 54,58 that they are positioned at the outside of adjacent secondary core limb 52.2 and 52.3.The same with the situation of transformer 120, other segmentation 132.1 and 132.2 stands to can be used for regulating the leakage inductance of transformer voltage output.
The inventor believes above-mentioned a kind of improvement flat surface transformer 50,110,120 and 130 that is specially adapted to computer equipment that the invention provides.Because the quantity that each magnetic track passes, be the central core limb 52.1 and the adjacent core limb 52.2 of transformer 50,52.3 between and the central core limb 32.1 of transformer 110,34.1 and adjacent core limb 32.2,34.2 between number of fragments can minimize, just can increase the thickness of magnetic track, therefore just can provide stronger current carrying capacity.And the copper magnetic track that limits segmentation 62.1 to 74.1 and 62.2 to 74.2 is mutual mirror image, and transformer just has been balanced in complete all processes, therefore just can reduce transformer fe magnetic saturation problem in the heart.
Claims (30)
1. flat surface transformer, it comprises:
One iron core;
One elementary winding, it is arranged on the elementary winding layers of extend through unshakable in one's determination;
One first level magnetic track, it is arranged on first level winding layers, and this first level magnetic track comprises several segmentations of connecting mutually of every paragraph qualification secondary winding; With
One second subprime magnetic track, it is arranged on the second subprime winding layers, and this second subprime magnetic track is provided with respect to first level magnetic track mode with mirror image.
2. flat surface transformer, it comprises:
One E core, it has the central core limb core limb adjacent with a plurality of interval;
One elementary winding, it is arranged on the elementary winding layers of central core limb extend through of magnetic core;
One first level magnetic track, it is arranged on first level winding layers, this first level magnetic track comprises several segmentations of connecting mutually of every paragraph qualification secondary winding, and this secondary winding comprises one fen circle coil, and its structure is arranged to provide transformer one predetermined low output voltage;
One second subprime magnetic track, it is arranged on the second subprime winding layers, and this second subprime magnetic track is provided with respect to first level magnetic track mode with mirror image; With
Several contacts, at least one group of predetermined low output voltage picks out from these contacts branches.
3. flat surface transformer, it comprises:
One iron core, it comprises the core limb that a central core limb is adjacent with at least one interval; With
A level magnetic track, it is formed by several segmentations that limit a level winding, and this secondary magnetic track that limits a petiolarea can stand this adjacent core limb leakage inductance effectively, can reduce reactive voltage on the secondary core limb with this.
4. transformer as claimed in claim 3 is characterized in that: it comprises an elementary winding, and this elementary winding is arranged on the elementary winding layers of extend through unshakable in one's determination, and this secondary magnetic track comprises:
One first level magnetic track, it is arranged on first level winding layers, and this first level magnetic track comprises several segmentations of connecting mutually of a level winding of every paragraph qualification; With
One second subprime magnetic track, it is arranged on the second subprime winding layers, and this second subprime magnetic track is provided with respect to first level magnetic track mode with mirror image.
5. as claim 1 or 2 or 4 arbitrary described transformers, it is characterized in that: first and second level magnetic tracks are arranged to make that the magnetic flux coupling of each is unbalanced in first and second level magnetic tracks of each half cycle, and the magnetic flux coupling in full week is a balance.
6. a kind of transformer as claimed in claim 5 is characterized in that: magnetic track is arranged to make the magnetic flux coupling of at least some segmentations of first and second magnetic tracks of each half cycle uneven, but during full week with regard to balance.
7. as the arbitrary described transformer in aforementioned claim 4 to 6, it is characterized in that: each segmentation is around one fen circle coil unshakable in one's determination at least, can divide with this to pick out the voltage of selecting in advance from secondary magnetic track.
8. as the arbitrary described transformer in aforementioned claim 4 to 7, it is characterized in that: the first and second secondary winding layers are integrally formed so that magnetic track is arranged on the opposite face of double-sided printed-circuit board.
9. as the arbitrary described transformer in aforementioned claim 4 to 7, it is characterized in that: the first and second secondary winding layers are limited by the printed circuit board (PCB) of two separation.
10. as the arbitrary described transformer in aforementioned claim 4 to 9, it is characterized in that: it comprises several first and second level magnetic tracks.
11. a kind of transformer as claimed in claim 10 is characterized in that: at least two first level magnetic tracks and at least two second subprime magnetic tracks are in parallel.
12. as the arbitrary described transformer in aforementioned claim 4 to 11, it is characterized in that: iron core is a ferrite core with E type, elementary winding and secondary magnetic track extend around the central core limb of E core usually.
13. a kind of transformer as claimed in claim 12, it is characterized in that: on the specific secondary winding layer between adjacent core limb of iron core and the central core limb unshakable in one's determination, be provided with the segmentation of different numbers, thereby cause transformer in this specific current potential imbalance, yet, because first and second level magnetic tracks are provided with in the mirror image mode, because the magnetic track total quantity between each adjacent core limb and the central core limb is a balance, so transformer is a balance in complete all processes.
14. as the arbitrary described transformer in aforementioned claim 4 to 13, it is characterized in that: it comprises several elementary windings, these elementary windings provide a sources of magnetic flux that is coupled with secondary winding at least.
15. as arbitrary described transformer in aforementioned claim 4 to 14, it is characterized in that: it comprises the surface mount board that is installed in the segmentation with the current carrying capacity that improves segmentation.
16. the arbitrary described transformer as in aforementioned claim 4 to 15 is characterized in that: it comprises that fin is to strengthen radiating effect.
17. the arbitrary described transformer as in aforementioned claim 4 to 16 is characterized in that: first level magnetic track forms the part of the big magnetic track that comprises other electric contact.
18. as the arbitrary described transformer in aforementioned claim 4 to 16, it is characterized in that: first and second times the level magnetic track is a spiral type, the form on printed circuit board (PCB) is the copper magnetic track.
19. a kind of transformer as claimed in claim 18 is characterized in that: segmentation is that series connection mutually is to limit first and second secondary winding, the width of these segmentations increases mind-set spiral type periphery from spiral type.
20. the described a kind of transformer of arbitrary as described above claim is characterized in that: it comprises a contact on each opposite end that is arranged on selected segmentation.
21. the described a kind of transformer of arbitrary as described above claim is characterized in that: this transformer is arranged to and can be upgraded, size unshakable in one's determination can be processed to allow the printed circuit board (PCB) that increases other, thereby strengthen the capacity disposal ability of transformer.
22. a method that reduces the reactive voltage on the secondary magnetic track of flat surface transformer, this method comprise that the petiolarea that secondary magnetic track is set is so that it can stand leakage inductance unshakable in one's determination effectively.
23. the method for a balancing plane transformer core, this method comprises:
One flat surface transformer is provided, it comprises the level magnetic track first and second times, first and second level magnetic tracks comprise that respectively several limit the segmentation of the mutual series connection of first and second secondary winding, and each in first and second secondary winding comprises a branch circle coil around transformer core at least; With
Mode with mutual mirror image is provided with the level magnetic track first and second times, with this can balancing transformer iron core.
24. a kind of method as claimed in claim 23, it is characterized in that: it comprises and is arranged on the synchro switch between the corresponding segment on the level magnetic track first and second times, therefore, accumulation provides the output voltage of selecting in advance of drawing from the corresponding segment of the auxiliary winding of level of each qualification.
25. a kind of method as claimed in claim 24 is characterized in that: it comprise by switching circuit from first with the corresponding segment of secondary magnetic track on divide synchronously and pick out several different voltage.
26. the power supply of an electric device, this power supply comprises:
Just like the arbitrary described transformer in aforementioned claim 1 to 21; With
Switching circuit is connected with the selected segmentation of transformer, is used for providing output voltage selectively from corresponding segmentation.
27. a new flat surface transformer, in fact with describe here and illustrate the same.
28. a new method that reduces the reactive voltage on the secondary magnetic track of flat surface transformer, in fact with describe here and illustrate the same.
29. the method for a new balancing plane transformer core, in fact with describe here and illustrate the same.
30. a new power supply, in fact with describe here and illustrate the same.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA987600 | 1998-08-21 | ||
| ZA98/7600 | 1998-08-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1319238A true CN1319238A (en) | 2001-10-24 |
Family
ID=25587228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99811122A Pending CN1319238A (en) | 1998-08-21 | 1999-08-09 | Planar transformer |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1105891A1 (en) |
| JP (1) | JP2002523896A (en) |
| CN (1) | CN1319238A (en) |
| AU (1) | AU4926099A (en) |
| CA (1) | CA2342164A1 (en) |
| WO (1) | WO2000011687A1 (en) |
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| CN101533705B (en) * | 2008-11-28 | 2011-05-25 | 东莞创慈磁性元件有限公司 | High-power planar transformer |
| CN102360853A (en) * | 2011-06-25 | 2012-02-22 | 中国电子科技集团公司第五十八研究所 | Planar transformer in switching power supply |
| US9009951B2 (en) | 2012-04-24 | 2015-04-21 | Cyntec Co., Ltd. | Method of fabricating an electromagnetic component |
| CN107887138A (en) * | 2016-09-30 | 2018-04-06 | 中国长城科技集团股份有限公司 | A kind of transformer half turn winding method and high frequency switch transformer |
| CN107895636A (en) * | 2017-09-27 | 2018-04-10 | 昆明理工大学 | A kind of flat surface transformer of the I type half turn windings of leakage-adjustable inductance |
| CN107946045A (en) * | 2017-09-27 | 2018-04-20 | 昆明理工大学 | A kind of leakage-adjustable inductance flat surface transformer of half turn winding |
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| EP1495475B1 (en) * | 2002-04-12 | 2008-05-07 | DET International Holding Limited | Low profile magnetic element |
| WO2007105187A1 (en) * | 2006-03-10 | 2007-09-20 | Commergy Technologies Limited | A transformer for multi-output power supplies |
| JP6084103B2 (en) * | 2013-04-16 | 2017-02-22 | オムロンオートモーティブエレクトロニクス株式会社 | Magnetic device |
| US9620278B2 (en) | 2014-02-19 | 2017-04-11 | General Electric Company | System and method for reducing partial discharge in high voltage planar transformers |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2476898B1 (en) * | 1980-02-22 | 1985-06-28 | Mini Informatiq System Ste Eur | ELECTROMAGNETIC WINDING HAVING DISCRETE ELEMENTS AND ELECTRIC POWER SUPPLY DEVICE HAVING SUCH WINDINGS |
| FR2615319B1 (en) * | 1987-05-15 | 1989-07-07 | Bull Sa | HIGH-COUPLING TRANSFORMER SUITABLE FOR A CUT-OUT POWER SUPPLY CIRCUIT AND CUT-OUT POWER SUPPLY CIRCUIT COMPRISING SUCH A TRANSFORMER |
| EP0371157B1 (en) * | 1988-11-28 | 1994-03-02 | Siemens Aktiengesellschaft | Network transformer |
| EP0698896B1 (en) * | 1994-08-24 | 1998-05-13 | Yokogawa Electric Corporation | Printed coil |
| US5781093A (en) * | 1996-08-05 | 1998-07-14 | International Power Devices, Inc. | Planar transformer |
-
1999
- 1999-08-09 CN CN99811122A patent/CN1319238A/en active Pending
- 1999-08-09 AU AU49260/99A patent/AU4926099A/en not_active Abandoned
- 1999-08-09 WO PCT/IB1999/001410 patent/WO2000011687A1/en not_active Application Discontinuation
- 1999-08-09 CA CA002342164A patent/CA2342164A1/en not_active Abandoned
- 1999-08-09 EP EP99933092A patent/EP1105891A1/en not_active Withdrawn
- 1999-08-09 JP JP2000566863A patent/JP2002523896A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533705B (en) * | 2008-11-28 | 2011-05-25 | 东莞创慈磁性元件有限公司 | High-power planar transformer |
| CN102034594A (en) * | 2009-09-29 | 2011-04-27 | 株式会社村田制作所 | Multilayer coil device |
| CN102034594B (en) * | 2009-09-29 | 2013-03-13 | 株式会社村田制作所 | Multilayer coil device |
| CN102360853A (en) * | 2011-06-25 | 2012-02-22 | 中国电子科技集团公司第五十八研究所 | Planar transformer in switching power supply |
| CN102360853B (en) * | 2011-06-25 | 2012-12-26 | 中国电子科技集团公司第五十八研究所 | Planar transformer in switching power supply |
| US9009951B2 (en) | 2012-04-24 | 2015-04-21 | Cyntec Co., Ltd. | Method of fabricating an electromagnetic component |
| TWI493577B (en) * | 2012-04-24 | 2015-07-21 | Cyntec Co Ltd | Electromagnetic component |
| CN107887138A (en) * | 2016-09-30 | 2018-04-06 | 中国长城科技集团股份有限公司 | A kind of transformer half turn winding method and high frequency switch transformer |
| CN107895636A (en) * | 2017-09-27 | 2018-04-10 | 昆明理工大学 | A kind of flat surface transformer of the I type half turn windings of leakage-adjustable inductance |
| CN107946045A (en) * | 2017-09-27 | 2018-04-20 | 昆明理工大学 | A kind of leakage-adjustable inductance flat surface transformer of half turn winding |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2342164A1 (en) | 2000-03-02 |
| EP1105891A1 (en) | 2001-06-13 |
| WO2000011687A1 (en) | 2000-03-02 |
| AU4926099A (en) | 2000-03-14 |
| JP2002523896A (en) | 2002-07-30 |
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