WO2005031765A1 - 積層型磁性部品 - Google Patents
積層型磁性部品 Download PDFInfo
- Publication number
- WO2005031765A1 WO2005031765A1 PCT/JP2003/012432 JP0312432W WO2005031765A1 WO 2005031765 A1 WO2005031765 A1 WO 2005031765A1 JP 0312432 W JP0312432 W JP 0312432W WO 2005031765 A1 WO2005031765 A1 WO 2005031765A1
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- WO
- WIPO (PCT)
- Prior art keywords
- wiring
- magnetic
- planar
- winding
- magnetic sheet
- Prior art date
Links
- 238000004804 winding Methods 0.000 claims abstract description 157
- 239000004020 conductor Substances 0.000 claims abstract description 29
- 238000003475 lamination Methods 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 9
- 239000000696 magnetic material Substances 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims 1
- 230000004907 flux Effects 0.000 description 35
- 238000010030 laminating Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 4
- 230000010354 integration Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 229910017518 Cu Zn Inorganic materials 0.000 description 1
- 229910017752 Cu-Zn Inorganic materials 0.000 description 1
- 229910017943 Cu—Zn Inorganic materials 0.000 description 1
- 206010041235 Snoring Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F17/0013—Printed inductances with stacked layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F17/0033—Printed inductances with the coil helically wound around a magnetic core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F2017/0066—Printed inductances with a magnetic layer
-
- 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
Definitions
- the present invention relates to a laminated inductor and a laminated transformer in which a coil and a core are formed using a thick film forming technique.
- FIG. 7 is an exploded perspective view showing a conventional laminated transformer.
- FIG. 8 is a vertical sectional view taken along the line VIII-VIII in FIG. 7 after lamination. The following is a description based on these drawings.
- the conventional laminated transformer 80 includes a magnetic sheet 82b, 82d for the primary winding on which the primary windings 81a and 81c are formed, and a secondary winding 81b, 8I. It is provided with a magnetic sheet 82c, 82e for the secondary winding on which d is formed, and magnetic sheets 82a, 82g sandwiching the magnetic sheets 82b to 82e. is there. A magnetic sheet 82 f for improving magnetic saturation characteristics is interposed between the magnetic sheet 82 e and the magnetic sheet 82 g.
- the magnetic sheets 82a to 82e are connected to the through-holes 90, 91, 92 connecting the primary windings 81a, 81c and the secondary windings 81b, 81d.
- Through holes 93, 94, 95 are provided.
- External electrodes 96 and 97 for the primary winding and external electrodes 98 and 99 for the secondary winding are provided on the lower surface of the magnetic sheet 82a.
- the through holes 90 to 96 are filled with a conductor.
- the magnetic sheets 82a to 82g are the core of the laminated transformer 80.
- FIGS. 7 and 8 are schematic diagrams, strictly speaking, the number of turns of the primary windings 81 a and 81 c and the secondary windings 81 b and 81 d 8 through holes 90 to 9 The position of 6 does not correspond between FIG. 7 and FIG.
- the external electrodes 96 ⁇ through holes 92 ⁇ The current flows in the order of —next winding 8 1 c ⁇ through-horne 9 1 ⁇ —next winding 8 1a ⁇ through-horne 90 0 ⁇ external electrode 97, and vice versa.
- the current flowing through the primary windings 81a and 81c generates a magnetic flux 100 (Fig. 8) in the magnetic sheets 82a to 82g.
- the magnetic flux 10 O generates an electromotive force corresponding to the turn ratio in the secondary windings 8 1 b and 8 1 d.
- the laminated transformer 80 operates.
- the self-inductance of the primary windings 81a and 81c is L1
- the self-inductance of the secondary windings 81b and 81d is L2
- the primary windings 81a and 81c are defined by the following equation.
- the electromagnetic coupling coefficient k is one of the indicators of transformer performance. The larger the value, the smaller the leakage magnetic flux (leakage inductance), and the higher the power conversion efficiency. Further, the conventional laminated inductor has the same configuration as the laminated transformer 80 except that the secondary windings 8 lb and 81 d are not provided. ⁇ task to solve ⁇
- the current capacity of the winding is small.
- the current capacity of the winding is roughly proportional to the conductor cross-sectional area of the winding.
- the conductor cross-sectional area of the winding is “film thickness X-ray width”.
- screen printing cannot make the film thickness too large. Even if the film thickness is increased, unevenness becomes severe, and it becomes difficult to stack the layers accurately.
- the line width is widened, the number of turns will decrease accordingly. Further, since the winding is located at the center of the laminated body made of the magnetic sheet, heat dissipation is poor. This has the effect of reducing the current allowance of the winding.
- High inductance value S cannot be obtained. High inductance value To increase the number of windings, it is necessary to increase the number of stacked magnetic sheets on which the windings are formed. However, as the number of stacked layers increases, the yield decreases as the number of layers increases. In practice, the limit is about 50 sheets. This limit also determines the inductance value.
- Figure 9 [1] shows a conventional laminated inductor 60.
- the multilayer inductor 60 has windings 62a to 62c sandwiched between magnetic sheets 61a to 61d.
- eddy currents 64a to 64d are generated in the plane direction of the magnetic sheets 61a to 61d. Therefore, the materials of the magnetic sheets 61a to 61d are limited to those having high electrical resistivity.
- FIG. 9 [2] shows conventional multilayer inductors 65 and 66.
- Laminated inductor 65 has windings 68a and 68b sandwiched between magnetic sheets 67a to 67c, and laminated inductor 66 has the same magnetic sheet 67a to 67c.
- the windings 68c and 68d are sandwiched between them.
- the windings 68a, 68b generate a magnetic flux 69a
- the windings 68c, 68d generate a magnetic flux 69b.
- two laminated inductors 65 and 66 are formed on the same magnetic sheet 67 a to 67 c in a laminated body, they interfere with each other. The reason is that since the upper and lower ends of the windings 68a and 68b are open, the magnetic sheets 67a and 67c of the uppermost layer and the lowermost layer, and the magnetic flux 70 leak.
- an object of the present invention is to provide a multilayer inductor and a multilayer transformer which can solve the above-mentioned problems of the conventional multilayer inductor and multilayer transformer. Disclosure of the invention
- the “film thickness direction” is used when there is one magnetic sheet, and the “stacking direction” is used when there are multiple magnetic sheets.
- the term “stacking direction” is used for convenience.
- a laminated inductor according to the present invention includes a magnetic sheet, at least one pair of opposed snorre holes provided on the magnetic sheet, and a wiring in a laminating direction including a conductor filled in these through holes. And at least a pair of opposing planar wirings formed on both sides of the magnetic sheet, and windings spirally formed by the planar wirings and the lamination direction wires.)
- a preferred embodiment of the laminated inductor according to the present invention includes a laminated magnetic sheet, at least a pair of opposed snorley holes provided in the magnetic sheet, and a conductive material filled in the snorley holes.
- a stacking direction wiring composed of a body, at least a pair of opposing plane direction wirings formed on the uppermost surface and the lowermost surface of the magnetic sheet, and a spiral formed by the plane direction wiring and the stacking direction wiring. It is equipped with a line.
- one end of the first layer wiring is connected to one end of the first planar wiring
- the other end of the first planar wiring is connected to one end of the second laminating wiring.
- the other end of the second lamination direction wiring is connected to one end of the second planar wiring, and is formed in a spiral shape by the planar wiring and the lamination direction wiring in the following manner.
- the odd-numbered wiring in the stacking direction and the even-numbered wiring in the stacking direction are opposed to each other, and the odd-numbered planar wiring and the even-numbered planar wiring are opposed to each other.
- the windings are connected to at least one pair of opposing stacked wirings and at least At least a spiral is formed from a pair of planar arrangements.
- the preferred embodiment of the laminated inductor according to the present invention has the following features.
- the current capacity of the winding is large.
- the current capacity of a winding is roughly proportional to the conductor cross-sectional area of the winding. Since the conductor cross-sectional area of the wiring in the stacking direction is the area of the through hole, it can be increased arbitrarily.
- the conductor cross-sectional area of the planar wiring has the same “film thickness X-ray width” as in the past. However, since only two layers are required for wiring in the plane direction (single winding: X is a multiple winding on the same plane), unevenness does not matter even if it is slightly thicker.
- the planar wiring surrounds the center of the laminated body made of the magnetic sheet as a core, and therefore is located around the laminated body. This has the effect of increasing the heat dissipation of the planar wiring and thus increasing the current capacity of the winding.
- a high inductance value is obtained.
- the number of wirings can be increased regardless of the number of stacked inductors, so that the inductance value can be easily increased.
- a dielectric film made of a non-magnetic material may be formed between each magnetic sheet and an adjacent magnetic sheet.
- the eddy current loss can be reduced with respect to the magnetic flux traveling in the plane direction.
- a magnetic flux that inevitably travels in the laminating direction is generated, so that even if a dielectric film is interposed between the magnetic sheets, the effect is small.
- the magnetic flux proceeds in the plane direction, so that the effect of inserting the dielectric film between the magnetic sheets is remarkable. Appear.
- a material having a low electric resistivity can be used for the magnetic sheet, and the range of choice of the material is widened.
- a dielectric film may be formed on the inner wall surface of the through hole.
- non-magnetic material means a substance having a magnetic permeability smaller than that of the magnetic sheet.
- Dielectric film is at least larger than a magnetic sheet It means a film having a high electrical resistivity, and may be called a dielectric film or an insulating film.
- the winding may have a shape in which both ends are opened, and another magnetic sheet which becomes a magnetic path in contact with the planar wiring may be provided.
- the region serving as a magnetic path increases, so that the magnetic saturation characteristics are improved.
- the winding has a shape in which both ends are closed. That is, the core of the winding is a closed magnetic path in which the planar wiring and the laminating wiring are uniformly wound at equal intervals to confine the magnetic flux.
- the magnetic shield effect is excellent. As a result, even if a plurality of laminated inductors are formed on a laminated body composed of many magnetic sheets, they do not interfere with each other. Therefore, it is effective for high-density integration of electronic components.
- the winding may be annular.
- conventional multilayer inductors it was difficult to form a toroidal core because the diameter of the torus was in the stacking direction.
- the ring can be made any size. Therefore, it is easy to manufacture and the inductance value can be increased arbitrarily.
- the winding can be formed at any angle with respect to the ring, the ring and the winding can always be perpendicular to each other. Therefore, the leakage magnetic flux due to the winding direction is extremely small.
- the toroidal winding has a curved surface with the same curvature, a smoothly connected magnetic flux can be formed, so that magnetic flux disturbance and non-uniformity can be minimized. Therefore, a laminated inductor having extremely low leakage magnetic flux can be easily realized.
- the toroidal winding has the advantage that the characteristics as calculated can be easily obtained. The reason for this is that the turbulence of the magnetic flux ⁇ the non-uniformity is suppressed, and the calculation is simplified. For example, if the average radius of the ring is r, the cross-sectional area of the ring is S, the number of turns is n, and the permeability of the magnetic sheet is ⁇ , the inductance L is given by the following equation.
- the multilayer transformer according to the present invention has substantially the same configuration and operation as the multilayer inductor according to the present invention in which the winding is replaced with a primary winding and a secondary winding.
- the primary winding and the secondary winding have a shape in which both ends are closed, and the primary winding and the secondary winding are wound on the same core.
- the electromagnetic coupling coefficient can be greatly improved. In particular, the effect becomes remarkable when an annular core is used.
- a laminated wiring and a planar wiring having a specific shape are formed on the magnetic sheet, and a spiral winding is formed by the planar wiring and the laminated wiring.
- the allowable current of the winding can be increased.
- the first reason is that the conductor cross-sectional area of the wiring in the stacking direction can be increased arbitrarily.
- a ring inductor and a ring transformer which were practically impossible with conventional multilayer inductors and transformers, can be realized.
- the reason is that the diameter of the ring is in the stacking direction in the prior art, whereas the diameter of the ring is in the plane direction in the present invention.
- the winding is annular, it is possible to minimize the turbulence and non-uniformity of the magnetic flux to the utmost, so that it is possible to easily realize a laminated inductor having a very small leakage flux and a laminated transformer having an extremely large electromagnetic coupling coefficient.
- FIG. 1 is an exploded perspective view showing a first embodiment of a laminated transformer according to the present invention
- FIG. 2 is a longitudinal sectional view taken along the line II-II in FIG. 1 after lamination
- FIG. 3 is a partial perspective view showing only the primary winding in FIG. 1 after lamination
- FIG. 4 is a plan view showing only the primary winding and the secondary winding in FIG. 1 after lamination.
- FIG. 5 is a process chart showing a method of manufacturing the laminated transformer of FIG.
- FIG. 6 is a plan view showing a second embodiment of the multilayer transformer according to the present invention.
- FIG. 7 is an exploded perspective view showing a conventional laminated transformer
- FIG. 8 is a longitudinal sectional view taken along the line VIII-VIII in FIG. 7 after lamination.
- Fig. 9 is an explanatory diagram showing the problems of the conventional technology.
- Fig. 9 [1] is an explanatory diagram of eddy current
- Fig. 9 [2] is an explanatory diagram of leakage magnetic flux
- Fig. 9 [3] is an annular shape.
- FIG. 4 is an explanatory diagram of an angle between a winding and a winding.
- the multilayer inductor has almost the same configuration as the multilayer transformer having either the primary winding or the secondary winding. Therefore, the description of the multilayer inductor will be omitted by describing the multilayer transformer.
- FIG. 1 is an exploded perspective view showing a first embodiment of the multilayer transformer according to the present invention.
- FIG. 2 is a vertical sectional view taken along the line II-II in FIG. 1 after lamination.
- FIG. 3 is a partial perspective view showing only the primary winding in FIG. 1 after lamination.
- FIG. 4 is a plan view showing only the primary winding and the secondary winding in FIG. 1 after lamination.
- the laminating direction is shown larger than the plane direction.
- the Z direction shown is the laminating direction
- the X and Y directions are the plane directions.
- the laminated transformer 10 of the present embodiment includes a plurality of laminated magnetic sheets 11 a-: L 1 i, and magnetic sheets 11 b-: through-holes 12 a-1 provided in L 1 i. 2 d, lamination direction wiring 13 a to 13 d consisting of conductor filled in through holes 12 a to 12 d, and magnetic sheet 11 b, 11 c, 1 lf, 11 g
- a primary winding 16 composed of the directional wirings 14b, 14c and the laminated directional wirings 13b, c is provided.
- the magnetic sheet laminated between the magnetic sheet 11 d and the magnetic sheet 11 e is the same as the magnetic sheets l i d and l i e, although not shown.
- the laminated transformer 10 is composed of a plurality of laminated magnetic sheets 11 c to: L lf and ten pairs of opposed snoring holes 1 2 b provided on the magnetic sheets 11 c to 11 f. , 12 c, wiring 13 3 b, 13 c made of a conductor filled in through holes 12 b, 12 c, the top surface of magnetic sheet 11 f and magnetic sheet 11 c And 10 pairs of opposing planar wirings 14 b and 14 c formed on the upper surface of the magnetic sheet (ie, the lower surface of the magnetic sheet 11 d).
- the primary winding 16 formed in a spiral by the surface direction wirings 14b, 14c and the laminating direction wirings 13b, 13c, and the magnetic sheets 11b to 11g.
- Ten pairs of opposing planar wirings 14a, 14d formed on the upper surface of the magnetic sheet 11b and the upper surface of the magnetic sheet 11b (ie, the lower surface of the magnetic license), and the planar wirings 14a, 14d.
- a secondary winding 15 which is spirally formed by the lamination direction wirings 13a and 13d and is magnetically coupled to the primary winding 16.
- the primary winding 16 and the secondary winding 15 have a solenoid shape with both ends open.
- Magnetic sheets 11a and 11b that are magnetic paths are provided in contact with the planar wiring 14a
- magnetic sheets 11h and 11i that are magnetic paths are provided in contact with the planar wiring 14d.
- a magnetic sheet 11a to 11c is provided which is in contact with the planar wiring 14b to be a magnetic path
- a magnetic sheet 11g to be in contact with the planar wiring 14c to be a magnetic path is: L 1 i is provided.
- Through holes 20 and 21 are provided respectively.
- external electrodes 22 and 23 for the secondary winding and external electrodes 24 and 25 for the primary winding are provided on the upper surface of the magnetic sheet 11 i.
- the through holes 18 to 21 are filled with a conductor. All magnetic sheets 11a to 11i force S, the core of laminated transformer 10.
- the current flows in the order of line 14 d ⁇ through hole 18 ⁇ external electrode 22, or vice versa.
- the current flowing through the primary winding 16 generates a magnetic flux 26 '(FIG. 2) in the magnetic sheets 11a to 11i.
- the magnetic flux 26 generates an electromotive force in the secondary winding 15 according to the turn ratio.
- the multilayer transformer 10 operates.
- the current capacity of the primary winding 16 and the secondary winding 15 can be easily increased.
- the current carrying capacity of the primary winding 16 and the secondary winding 15 is approximately proportional to the conductor cross-sectional area.
- the conductor cross-sectional area of the lamination direction wirings 13a to l3d is the area of the through holes 12a to 12d, and can be increased as much as possible.
- the conductor cross-sectional areas of the planar wirings 14a to 14d have the same “film thickness X-ray width” as in the past. However, since only four layers are required for the planar wirings 14a to 14d, unevenness does not matter even if the thickness is slightly increased.
- planar wirings 14a to 14d surround the stacked body composed of the magnetic sheets 11a to 11i as a core, and thus are positioned around the stacked body. Since this improves the heat dissipation of the planar wirings 14a to 14d, it works in the direction of increasing the allowable current of the primary winding 16 and the secondary winding 15.
- a high inductance value can be obtained.
- the direction wiring 13a to 13d may be reduced.
- the number of wirings can be increased irrespective of the number of laminated layers, so that the inductance value can be easily increased.
- the magnetic sheets 11a to 11c and 11g to 11i are provided in contact with the planar wirings 14a to 14d, so that the Since the region becomes larger, it has excellent magnetic saturation characteristics. '
- a dielectric film made of a non-magnetic material may be interposed between each of the magnetic sheets 11 a,... Between adjacent magnetic sheets. In this case, the eddy current loss can be reduced with respect to the magnetic flux 26 traveling in the plane direction. Such a dielectric film is applied, W
- It may be formed by a simple method such as dipping or spraying. At this time, it is more preferable to form a dielectric film on the inner wall surfaces of the through holes 12a to 12d at the same time. That is, a material having a low electrical resistivity can be used as the material of the magnetic sheets 11a,.
- FIG. 5 is a process chart showing a method for manufacturing the laminated transformer of FIG.
- description will be given based on FIG. 1 and FIG.
- a magnetic slurry is prepared (Step 31).
- the magnetic material is, for example, a Ni-Cu-Zn system.
- a magnetic sheet is formed by placing the [komagine 'I] biological slurry on PET (polyethylene terephthalate) finolem using the doctor blade method (step 32).
- the magnetic sheets 11a to 11i are obtained by cutting the conductive sheet body (step 33).
- step 34 through holes 12a to 12d and 18 to 21 are formed on the magnetic sheets 11b to 11i by pressing or the like (step 34), and an Ag-based conductive paste is formed. Screen-printing is used to form the planar wirings 14a to 14d, and the through holes 12a to 12d and 18 to 21 are filled with a conductor (step 35).
- the magnetic sheet 1 obtained in Step 3 3 1a and the magnetic sheets llb to lli obtained in step 35 are peeled off from the PET film and laminated, and these are brought into close contact using a hydrostatic press to form a laminate (step 36).
- the laminate is cut into a predetermined size (step 37).
- simultaneous firing is performed at around 900 ° C. (Step 38).
- the laminated transformer 10 is completed (step 39).
- the actual dimensions of each component are illustrated.
- the magnetic sheets 11a, ... have a film thickness of 80 ⁇ , a width of 8 mm, and a depth of 6 mm.
- the film thickness is 12 ⁇ m
- the line width is 200 m
- the distance between the lines is 150 ⁇ m.
- the diameter of the through holes 12a to 12d is "" m.
- the number of sheets constituting the laminated transformer 10 is 10 to 50 The degree is practical.
- FIG. 6 is a plan view showing a second embodiment of the multilayer transformer according to the present invention.
- the illustrated Z direction is the laminating direction, and the X and Y directions are planar directions.
- description will be made based on this drawing.
- the laminated transformer 40 of the present embodiment includes a magnetic sheet 41 in which a plurality of laminated sheets are laminated, a plurality of pairs of through holes 4 2 b and 4 2 c provided in the magnetic sheet 41, and a through hole 4 2 b, 42 c, a lamination direction wiring made of a conductor filled in 4 c, and a plurality of pairs of opposing planar wirings formed on the uppermost surface and the lowermost surface of the magnetic sheet 41 4 4 4 b, 44 c, a primary winding 46 spirally formed by planar wirings 44 b, 44 c and laminating wirings 43 b, 43 c, and a magnetic sheet 41.
- the primary winding 46 and the secondary winding 45 have an annular shape, that is, a shape in which both ends are closed, and are wound around the same core. That is, the cores of the primary winding 46 and the secondary winding 45 are formed such that the planar wirings 44a to 44d and the laminating wirings 43a to 43d are uniformly wound at equal intervals. It is a closed magnetic path in which magnetic flux is confined. In this case, since the magnetic flux is confined in the primary winding 46 and the secondary winding 45 and does not leak out of the primary winding 46 and the secondary winding 45, the magnetic shielding effect is excellent. As a result, even if multiple multilayer inductors and multilayer transformers are formed on the same magnetic sheet, they will not interfere with each other.
- the ring can be made any size. Therefore, it is easy to manufacture, and the inductance value can be increased arbitrarily. Further, since the primary winding 46 and the secondary winding 45 can be formed at any angle with respect to the ring, the angle formed with the ring can always be a right angle. Therefore, the leakage magnetic flux due to the winding direction is extremely small. Further, since the annular core can form a smoothly connected magnetic flux by bending all sections in the same curvature, the disturbance of the magnetic flux and the non-uniformity can be minimized. Therefore, since the laminated transformer 40 has a very small leakage magnetic flux, the electromagnetic coupling coefficient k can be greatly improved.
- the primary winding 46 and the secondary winding 45 are not limited to an annular shape, but may be a triangular shape, a square shape, a polygonal shape, or the like.
- the materials and dimensions of each component, the overall manufacturing method, and the like are in accordance with the above-described first embodiment.
- the present invention is not limited to the first and second embodiments.
- the number of magnetic sheets, the number of turns of the primary winding and the number of turns of the secondary winding, and the ratio of the numbers of turns of the primary winding and the secondary winding may be arbitrary.
- the primary winding and the secondary winding are not limited to a single winding, and may be multiple windings. A plurality of secondary windings may be provided for one primary winding.
- the laminated sheet and the planar wiring having a specific shape are formed on the magnetic sheet, and the spiral winding is formed by the planar wiring and the laminated wiring. Therefore, it is possible to increase the allowable current of the winding.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2003/012432 WO2005031765A1 (ja) | 2003-09-29 | 2003-09-29 | 積層型磁性部品 |
AU2003266684A AU2003266684A1 (en) | 2003-09-29 | 2003-09-29 | Laminated magnetic component |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2003/012432 WO2005031765A1 (ja) | 2003-09-29 | 2003-09-29 | 積層型磁性部品 |
Publications (1)
Publication Number | Publication Date |
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WO2005031765A1 true WO2005031765A1 (ja) | 2005-04-07 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/012432 WO2005031765A1 (ja) | 2003-09-29 | 2003-09-29 | 積層型磁性部品 |
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AU (1) | AU2003266684A1 (ja) |
WO (1) | WO2005031765A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007111796A (ja) * | 2005-10-18 | 2007-05-10 | Tohnichi Mfg Co Ltd | トルク機器 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62176111A (ja) * | 1986-01-30 | 1987-08-01 | Matsushita Electric Ind Co Ltd | 高周波トランス |
JPH04239109A (ja) * | 1991-01-11 | 1992-08-27 | Murata Mfg Co Ltd | 積層型トランス |
-
2003
- 2003-09-29 WO PCT/JP2003/012432 patent/WO2005031765A1/ja not_active Application Discontinuation
- 2003-09-29 AU AU2003266684A patent/AU2003266684A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62176111A (ja) * | 1986-01-30 | 1987-08-01 | Matsushita Electric Ind Co Ltd | 高周波トランス |
JPH04239109A (ja) * | 1991-01-11 | 1992-08-27 | Murata Mfg Co Ltd | 積層型トランス |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007111796A (ja) * | 2005-10-18 | 2007-05-10 | Tohnichi Mfg Co Ltd | トルク機器 |
JP4512544B2 (ja) * | 2005-10-18 | 2010-07-28 | 株式会社東日製作所 | トルク機器 |
Also Published As
Publication number | Publication date |
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AU2003266684A1 (en) | 2005-04-14 |
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