WO2014097455A1 - トランス - Google Patents

トランス Download PDF

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Publication number
WO2014097455A1
WO2014097455A1 PCT/JP2012/083123 JP2012083123W WO2014097455A1 WO 2014097455 A1 WO2014097455 A1 WO 2014097455A1 JP 2012083123 W JP2012083123 W JP 2012083123W WO 2014097455 A1 WO2014097455 A1 WO 2014097455A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil pattern
primary
coil
surface shape
insulating layer
Prior art date
Application number
PCT/JP2012/083123
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
寛史 城
和之 指田
Original Assignee
新電元工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 新電元工業株式会社 filed Critical 新電元工業株式会社
Priority to PCT/JP2012/083123 priority Critical patent/WO2014097455A1/ja
Priority to KR1020157014110A priority patent/KR101638948B1/ko
Priority to PCT/JP2013/070730 priority patent/WO2014097673A1/ja
Priority to CN201380061706.2A priority patent/CN105122396B/zh
Priority to JP2014552954A priority patent/JP6054422B2/ja
Publication of WO2014097455A1 publication Critical patent/WO2014097455A1/ja

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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
    • H01F27/2847—Sheets; Strips
    • 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
    • H01F27/2847—Sheets; Strips
    • H01F2027/2857—Coil formed from wound foil conductor

Definitions

  • the present invention relates to a transformer having a coil pattern having a surface shape.
  • FIG. 4 is a cross-sectional view of a prior art transformer. Each of the primary winding 101 and the secondary winding 102 shown in FIG. 4 is covered with an insulating member.
  • the current flowing in the primary winding 101 or the secondary winding is caused by a so-called proximity effect in the mode shown in FIG.
  • the currents flowing in the wire 102 repel each other, and the currents flowing in the windings 101 and 102 flow at positions separated from each other.
  • the cross-sectional area through which the current flows in the windings 101 and 102 becomes small, and as a result, the resistance increases.
  • the primary winding 101 or secondary located inside is affected by both the skin effect and the proximity effect. It becomes difficult for current to flow through the winding 102, and the resistance increases considerably. More specifically, in the aspect shown in FIG. 4, the primary winding 101 in the second row of the primary windings 101 in the three rows and the primary winding 101 not located at the upper and lower ends and the two rows in the three rows. Of the secondary windings 102, the secondary windings 102 in the second row and the secondary windings 102 that are not positioned at the upper and lower ends make it difficult for current to flow, and the resistance increases considerably.
  • the present invention prevents the current flowing region from becoming extremely small due to the skin effect even when operated at a high frequency, and the cross-sectional area through which the current flows is small due to the proximity effect. By suppressing this, it is possible to efficiently pass a current, to reduce the size, and to provide a transformer that does not collapse.
  • the transformer of the present invention is A primary coil pattern having a primary surface shape portion made up of a single surface shape, a secondary coil pattern having a secondary surface shape portion made up of a single surface shape, and between the primary coil pattern and the secondary coil pattern A coil portion having an insulating layer disposed, The primary coil pattern and the insulating layer are in intimate contact, The insulating layer and the secondary coil pattern are in close contact.
  • the coil portion may be wound so as to have a column shape.
  • the primary coil pattern and the secondary coil pattern are viewed along the radial direction of the coil portion, the primary coil pattern, the order of the secondary coil pattern or the secondary coil pattern, the primary coil pattern They may be arranged in order.
  • the insulating layer has an insulating film disposed between the primary coil pattern and the secondary coil pattern,
  • the primary coil pattern is provided on one surface of the insulating film,
  • the secondary coil pattern may be provided on the other surface of the insulating film.
  • the coil part is wound in a columnar shape
  • the ratio of the number of times of winding of the primary coil pattern and the number of times of winding of the secondary coil pattern may be 1: n (“n” is an integer of 2 or more) or n: 1.
  • the insulating layer may include a primary insulating layer formed so as to cover the primary coil pattern or a secondary insulating layer formed so as to cover the secondary coil pattern.
  • the insulating layer may include a primary insulating layer formed so as to cover the primary coil pattern and a secondary insulating layer formed so as to cover the secondary coil pattern.
  • the coil part is wound in a columnar shape
  • the primary coil pattern has a primary protruding portion that protrudes in a direction including a component in a direction orthogonal to the winding direction of the coil portion from the primary surface shape portion
  • the secondary coil pattern has a secondary protrusion protruding in a direction including a component in a direction orthogonal to the winding direction of the coil part from the secondary surface shape part
  • the direction in which the primary protrusion protrudes from the primary surface shape portion and the direction in which the secondary protrusion protrudes from the secondary surface shape portion may have components opposite to each other.
  • the coil part is wound in a columnar shape
  • a heat radiating member made of an insulating material may be provided at a position on the direction side perpendicular to the winding direction of the coil portion with respect to the primary surface shape portion and adjacent to the primary surface shape portion.
  • the coil part is wound in a columnar shape
  • a heat dissipating member made of an insulating material may be provided at a position on the direction side perpendicular to the winding direction of the coil portion with respect to the secondary surface shape portion and adjacent to the secondary surface shape portion.
  • the coil portion further includes a tertiary coil pattern having a tertiary surface shape portion composed of a single-layer surface shape,
  • a tertiary coil pattern having a tertiary surface shape portion composed of a single-layer surface shape
  • the transformer of the present invention is It further includes a core having a columnar portion made of a columnar shape, The coil part may be wound around the columnar part.
  • the transformer of the present invention is You may further provide the cooling storage part which stored the antifreeze liquid in which the said coil part is immersed.
  • a plurality of the secondary coil patterns are provided,
  • the coil part is wound in a columnar shape,
  • Each secondary coil pattern occupies a different area in a direction orthogonal to the winding direction of the coil part,
  • Each secondary coil pattern has a secondary protrusion that protrudes in a direction including a component in a direction orthogonal to the winding direction of the coil part from the secondary surface shape part,
  • the secondary protrusion of the secondary coil pattern may be connected to the secondary protrusion of another secondary coil pattern other than the secondary coil pattern.
  • a primary coil pattern having a primary surface shape portion having a single layer shape and a secondary coil pattern having a secondary surface shape portion having a single layer shape are employed. For this reason, even if it is a case where it operates at a high frequency, it can prevent that the area
  • the primary coil patterns and the secondary coil patterns are not adjacent to each other, so that it is possible to suppress a reduction in the cross-sectional area through which current flows due to the proximity effect.
  • this invention can prevent that resistance becomes large by limiting the area
  • the size of the transformer can be reduced.
  • FIG. 1 is a perspective view of a transformer according to a first aspect of an embodiment of the present invention.
  • FIG. 2A is a simplified perspective view showing a transformer according to the second aspect of the embodiment of the present invention.
  • FIG. 2B is a perspective view of a transformer according to the second aspect of the embodiment of the present invention.
  • FIG. 3A (a) is a plan view showing the primary coil pattern side by unfolding the coil portion of the transformer according to the second aspect of the embodiment of the present invention, and FIG. 3A (b) is an embodiment of the present invention. It is the top view which expand
  • FIG. 3B (a) is a plan view showing the secondary coil pattern side by expanding the coil portion of the transformer according to the modification of the second aspect of the embodiment of the present invention
  • FIG. 3B (b) It is the top view which expand
  • FIG. 4 is a cross-sectional view of a prior art transformer.
  • or FIG. 3B is a figure for demonstrating embodiment of this invention.
  • the transformer 100 includes a core having a base portion, a columnar portion having a column shape extending from the base portion, and a coil portion 10 wound around the columnar portion and having a columnar shape. .
  • description will be made using an embodiment provided with such a core, but it is sufficient that the coil portion 10 is wound in a columnar shape, and the core is not necessarily required.
  • the coil portion 10 includes a primary coil pattern 11 having a primary surface shape portion 11a (see FIG. 3A (a)) having a single layer shape, and a secondary surface shape portion 12a (FIG. 3A (b)) having a single surface shape.
  • the primary coil pattern 11 and the insulating layer 30 are in close contact with each other, and the insulating layer 30 and the secondary coil pattern 12 are in close contact with each other.
  • the primary coil pattern 11 and the secondary coil pattern 12 are the order of the primary coil pattern 11 and the secondary coil pattern 12 or the secondary coil pattern 12.
  • the primary coil patterns 11 are arranged in this order.
  • the coil part 10 consists of copper, aluminum, gold
  • the material of the coil part 10 should just be a conductor.
  • the insulating layer 30 is made of, for example, polyimide and has plasticity.
  • the insulating layer 30 includes both the primary insulating layer 31 formed so as to cover the primary coil pattern 11 and the secondary insulating layer 32 formed so as to cover the secondary coil pattern 12.
  • the insulating layer 30 is formed of the primary insulating layer 31 formed so as to cover the primary coil pattern 11 or the secondary insulating layer 32 formed so as to cover the secondary coil pattern 12. It is also possible to adopt an embodiment having either one.
  • the insulating layer 30 may include a primary insulating layer 31 formed so as to cover the primary coil pattern 11, and the outermost secondary coil pattern 12 may be covered with an end insulating layer.
  • the insulating layer 30 may have a secondary insulating layer 32 formed so as to cover the secondary coil pattern 12, and in this case, the innermost primary coil pattern 11. Is covered with the end insulating layer.
  • the coil part 10 has the tertiary coil pattern which has the tertiary surface shape part which consists of a single-layer surface shape, and the quaternary surface shape part which consists of a single-surface shape other than the primary coil pattern 11 and the secondary coil pattern 12.
  • a quaternary coil pattern may have an l-order coil pattern having a l-order surface shape portion composed of a single-layer surface shape (“l” is an integer).
  • the coil part 10 has the primary coil pattern 11, the secondary coil pattern 12, and the tertiary coil pattern
  • the primary coil pattern 11 when it sees along the radial direction of the coil part 10, the primary coil pattern 11, the secondary coil pattern 12
  • the tertiary coil pattern is arranged in the order of the primary coil pattern 11, the secondary coil pattern 12, and the tertiary coil pattern.
  • a secondary coil When the primary coil pattern 11, the secondary coil pattern 12, and the tertiary coil pattern are seen along the radial direction of the coil part 10, a tertiary coil pattern, a secondary coil
  • the pattern 12 and the primary coil pattern 11 may be arranged in this order.
  • the coil unit 10 includes the primary coil pattern 11 and the secondary coil pattern 12, a tertiary coil pattern having a tertiary surface shape portion having a single layer shape, and a quaternary surface shape having a single layer shape.
  • a quaternary coil pattern having a portion,..., A primary coil pattern having a primary surface shape portion having a single-layer surface shape. 11 and a secondary coil pattern 12 will be used.
  • the coil unit 10 includes the primary coil pattern 11 and the secondary coil pattern 12
  • the primary coil pattern 11 is provided on the insulating film 38
  • the secondary coil pattern 12 is provided on another insulating film 39.
  • a mode in which the primary coil pattern 11, the insulating film 38, the secondary coil pattern 12, and the insulating film 39 are arranged in this order can be used (see FIG. 1).
  • the insulating layer 30 is the insulating film 35 arrange
  • the primary coil pattern 11 is provided on the surface (one surface) of the insulating film 35
  • the secondary coil pattern 12 is provided on the back surface (the other surface) of the insulating film 35. (See FIGS. 2A, 2B and 3A (a) (b)).
  • each of the primary coil pattern 11 and the secondary coil pattern 12 is provided in the insulating film 35, for example by printing or bonding.
  • FIG. 2A is a perspective view schematically showing the transformer 100 according to the second aspect of the embodiment of the present invention
  • FIG. 2B is a diagram of the transformer 100 according to the second aspect of the embodiment of the present invention. It is a perspective view.
  • the primary insulating layer 31 and a heat radiating member 40 described later are omitted in order to simply show the configuration of the transformer 100.
  • FIG. 3A (a) is a plan view showing the primary coil pattern 11 side by unfolding the coil portion 10 of the transformer 100 according to the second aspect of the present embodiment
  • the primary coil pattern 11 is provided with two or more, for example, and each primary coil pattern 11 is in the winding direction (left-right direction of FIG. 3A (a)) of the coil part 10. It occupies different areas (three different areas in the mode shown in FIG. 3A), and a mode in which only one secondary coil pattern 12 is provided can be used (see FIG. 3A (b)).
  • this aspect is an example to the last, and is not limited to the said aspect.
  • each primary coil pattern 11 is wound around the columnar part.
  • the ratio of the number of times of winding and the number of times of winding of the secondary coil pattern 12 around the columnar portion may be 1: n (“n” is an integer of 2 or more).
  • the ratio of the number of times each primary coil pattern 11 is wound around the columnar part and the number of times the secondary coil pattern 12 is wound around the columnar part is 1: 3. More specifically, as shown in FIGS. 3A (a) and 3 (b), three primary coil patterns 11 are formed on the surface side of the insulating film 35 of the coil portion 10. On the other hand, one secondary coil pattern 12 is formed on the back side of the insulating film 35 of the coil portion 10. In the present embodiment, each primary coil pattern 11 of the coil portion 10 is wound so as to rotate once around the columnar portion, and the secondary coil pattern 12 of the coil portion 10 is wound around three times around the columnar portion. It is.
  • the ratio of the number of times each primary coil pattern 11 is wound around the columnar portion and the number of times the secondary coil pattern 12 is wound around the columnar portion is 1: 3.
  • the upper left primary surface shape portion 11a located on the left side, the upper left primary surface shape portion 11a located in the middle, and the primary surface shape portion 11a located on the right side See arrow A1 in FIG. 3A
  • the upper right side of the primary surface shape portion 11a located on the left side, the upper right side of the primary surface shape portion 11a located in the middle, and the primary surface located on the right side What is necessary is just to connect with the upper right of the shape part 11a (refer arrow A 2 of FIG. 3A (a)).
  • each secondary coil pattern 12 f and 12 s is orthogonal to the winding direction of the coil portion 10 (FIG. 3B). Different areas may be occupied in the vertical direction of (a).
  • each secondary coil pattern 12 f , 12 s is a component in the direction perpendicular to the winding direction of the coil portion 10 from the secondary surface shape portions 12 a f , 12 a s (vertical direction in FIG. 3B (a)).
  • a secondary protrusion protruding in a direction including the secondary protrusion of the secondary coil pattern 12 f and a secondary protrusion of another secondary coil pattern 12 s other than the secondary coil pattern 12 f Can be connected. More specifically, when the coil part 10 is wound, the secondary protrusion part located outside (for example, the secondary protrusion part located on the right side in FIG. 3B (a)) and the coil part 10 are wound. What is necessary is just to connect the secondary protrusion part (For example, the secondary protrusion part located in the left side in FIG. 3B (a)) located inward (refer arrow A3 of FIG. 3B (a)). By using such an aspect, the number of turns of the secondary coil pattern 12 can be increased, which is beneficial. 3B (a) and (b), the ratio between the number of times each primary coil pattern 11 is wound around the columnar portion and the number of times the secondary coil pattern 12 is wound around the columnar portion. However, it is 1: 2.
  • each primary coil pattern 11 may be provided, and each primary coil pattern 11 may occupy different regions in a direction orthogonal to the winding direction of the coil portion 10. And in this case, each primary coil pattern 11 has a primary protrusion part which protruded in the direction containing the component of the direction orthogonal to the winding direction of the coil part 10 from the primary surface shape part 11a, and the primary protrusion of the primary coil pattern 11 And a primary protrusion of another primary coil pattern 11 other than the primary coil pattern 11 may be connected.
  • a primary protrusion that is located outward when the coil part 10 is wound may be connected to a primary protrusion that is located inward when the coil part 10 is wound.
  • the insulating layer 30 is not limited to the aspect having both the primary insulating layer 31 and the secondary insulating layer 32, and the insulating layer 30 has only the primary insulating layer 31 or only the secondary insulating layer 32. It may be.
  • the insulating layer 30 has only the primary insulating layer 31, the outermost secondary coil pattern 12 is covered with the end insulating layer, and the insulating layer 30 has only the secondary insulating layer 32. In this case, the innermost primary coil pattern 11 is covered with the end insulating layer.
  • the insulating layer 30 includes the insulating film 35 disposed between the primary coil pattern 11 and the secondary coil pattern 12, and the primary coil pattern 11 is provided on the surface of the insulating film 35.
  • the secondary coil pattern 12 is provided on the back surface of the insulating film 35.
  • a separation insulating layer that is a separate body from the primary coil pattern 11 and the secondary coil pattern 12 may be provided between the pattern 12 and the primary coil pattern 11 (third aspect).
  • a separation insulating layer is used in place of the insulating film 35 provided on the front surface and the back surface of each of the primary coil pattern 11 and the secondary coil pattern 12 used in the second aspect. It will be.
  • each of the primary insulating layer 31, the secondary insulating layer 32, the insulating film 35, the end insulating layer and the separation insulating layer may be made of the same material or different materials. May be.
  • a polyimide film can be given as an example of what is used for the primary insulating layer 31, the secondary insulating layer 32, the insulating film 35, the end insulating layer, and the insulating layer for separation.
  • the primary coil pattern 11 protrudes from the primary surface shape portion 11a in a direction including a component perpendicular to the winding direction of the coil portion 10 (vertical direction in FIG. 3A (a)).
  • the secondary coil pattern 12 includes components in a direction (vertical direction in FIG. 3A (b)) perpendicular to the winding direction of the coil part 10 from the secondary surface shape part 12a. It may have a secondary protrusion that protrudes in the direction and also serves as a “lead line”.
  • the direction in which the primary protrusion protrudes from the primary surface shape portion 11a (the direction toward the upper side of FIG. 3A (a)) and the direction in which the secondary protrusion protrudes from the secondary surface shape portion 12a (FIG.
  • the direction orthogonal to the winding direction of the coil part 10 is a direction where the axis
  • Each of the primary protrusion and the secondary protrusion has a cross-sectional area that matches the capacity of the primary coil pattern 11 and the secondary coil pattern 12.
  • the cross-sectional areas of the primary protrusion and the secondary protrusion are slightly smaller than the cross-sectional areas of the primary coil pattern 11 and the secondary coil pattern 12. Even if it is such an aspect, since a primary protrusion part and a secondary protrusion part are each exposed outside and are easy to cool, it is hard to produce a trouble at the time of flowing an electric current.
  • the position on the direction side perpendicular to the winding direction of the coil portion 10 with respect to the primary surface shape portion 11a and adjacent to the primary surface shape portion 11a (this embodiment In the embodiment, the heat dissipating member 40 made of an insulating material is provided on both the upper and lower sides of the primary surface shape portion 11a.
  • the position on the direction side perpendicular to the winding direction of the coil portion 10 with respect to the secondary surface shape portion 12a and the position adjacent to the secondary surface shape portion 12a (in this embodiment, the shape of the secondary surface)
  • a heat radiating member 40 made of an insulating material is provided on both the upper and lower sides of the portion 12a.
  • the heat radiating member 40 is made of, for example, ceramic, sapphire, diamond, or the like.
  • a primary coil pattern 11 having a primary surface shape portion 11a having a single surface shape and a secondary coil pattern 12 having a secondary surface shape portion 12a having a single surface shape are employed. (See FIGS. 3A (a) and 3 (b)). For this reason, even if it is a case where it operates at a high frequency, it can prevent that the area
  • the primary surface shape portion 11a and the secondary surface shape portion 12a can take a large area in which current flows, so that the area in which current flows can be prevented from becoming extremely small.
  • primary coil patterns 11 and secondary coil patterns 12 do not adjoin, and the primary coil pattern 11 and the secondary coil pattern 12 follow the radial direction of the coil part 10. Therefore, it is possible to suppress a reduction in the cross-sectional area through which current flows due to the proximity effect.
  • this Embodiment it can prevent that resistance becomes large by limiting the area
  • the insulating layer 30 which consists of a polyimide film etc. is provided between the primary coil pattern 11 and the secondary coil pattern 12, (refer FIG.1 and FIG.2B), There is no need to use the layered paper 105 as in the prior art.
  • the primary coil pattern 11 having the primary surface shape portion 11a having a single layer shape and the secondary coil pattern 12 having the secondary surface shape portion 12a having a single layer shape are adopted, the conventional winding There is no useless space between the lines 101 and 102, and it is not necessary to use an end filler.
  • the size of the transformer 100 can be reduced.
  • the windings 101 and 102 are not used as in the conventional case, the windings m and m (where “m” is an integer) are wound halfway as in the conventional windings 101 and 102.
  • the windings 101 and 102 do not collapse as in the conventional case.
  • the primary coil pattern 11 is provided on the surface of the insulating film 35, and the secondary coil pattern 12 is provided on the back surface of the insulating film 35 (FIGS. 2B and 2C).
  • the insulating layer 30 includes a primary insulating layer 31 formed so as to cover the primary coil pattern 11 and / or a secondary insulating layer 32 formed so as to cover the secondary coil pattern 12.
  • the ratio of the number of times each primary coil pattern 11 is wound around the columnar part to the number of times the secondary coil pattern 12 is wound around the columnar part is 1:
  • n is an integer of 2 or more
  • the space can be used effectively, which is preferable.
  • the primary coil pattern 11 is provided on the surface of the insulating film 35 and the secondary coil pattern 12 is provided on the back surface of the insulating film 35.
  • the ratio of the number of times the primary coil pattern 11 is wound and the number of times the secondary coil pattern 12 is wound is not 1: n or n: 1, it is not used on the front surface or the back surface on the insulating film 35. A space is inevitably generated, resulting in a useless space.
  • the ratio of the number of times the primary coil pattern 11 is wound and the number of times the secondary coil pattern 12 is wound is 1: n or n: 1, the front and back surfaces on the insulating film 35 are effective. It can be used for.
  • the insulating layer 30 includes a primary insulating layer 31 formed so as to cover the primary coil pattern 11 and a secondary insulating layer 32 formed so as to cover the secondary coil pattern 12.
  • a primary insulating layer 31 formed so as to cover the primary coil pattern 11
  • a secondary insulating layer 32 formed so as to cover the secondary coil pattern 12.
  • the insulating layer 30 is formed so as to cover the primary coil pattern 11, and the secondary insulating layer is formed so as to cover the secondary coil pattern 12.
  • the direction in which the primary protrusion protrudes from the primary surface shape portion 11a (the direction toward the upper side of FIG. 3A (a)) and the direction in which the secondary protrusion protrudes from the secondary surface shape portion 12a (
  • the protruding direction of the so-called “lead line” can be reversed.
  • an external device such as a power source
  • the heat radiating member 40 made of an insulating material is located at a position on the direction side orthogonal to the winding direction of the coil portion 10 with respect to the primary surface shape portion 11a and adjacent to the primary surface shape portion 11a.
  • a heat dissipating member 40 made of an insulating material is provided at a position on the side perpendicular to the winding direction of the coil portion 10 with respect to the secondary surface shape portion 12a and adjacent to the secondary surface shape portion 12a.
  • the heat of each of the primary coil pattern 11 and the secondary coil pattern 12 can be radiated through the heat radiating member 40.
  • each electrical resistance of the primary coil pattern 11 and the secondary coil pattern 12 becomes high by heat_generation
  • the cooling storage part which stored the antifreeze liquid in this Embodiment since the coil part 10 and a core can be cooled with an antifreeze liquid, the primary coil pattern 11 and the secondary coil pattern 12 are generated by heat generation. It can suppress more efficiently that each electrical resistance becomes high.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
PCT/JP2012/083123 2012-12-20 2012-12-20 トランス WO2014097455A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/JP2012/083123 WO2014097455A1 (ja) 2012-12-20 2012-12-20 トランス
KR1020157014110A KR101638948B1 (ko) 2012-12-20 2013-07-31 변압기
PCT/JP2013/070730 WO2014097673A1 (ja) 2012-12-20 2013-07-31 トランス
CN201380061706.2A CN105122396B (zh) 2012-12-20 2013-07-31 变压器
JP2014552954A JP6054422B2 (ja) 2012-12-20 2013-07-31 トランス

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PCT/JP2012/083123 WO2014097455A1 (ja) 2012-12-20 2012-12-20 トランス

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JPH07211549A (ja) * 1994-01-25 1995-08-11 Matsushita Electric Works Ltd 電磁装置
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JPS57119516U (ko) * 1981-01-19 1982-07-24
JPS5877210A (ja) * 1981-10-31 1983-05-10 Toshiba Corp 変圧器
JPH07130554A (ja) * 1991-04-26 1995-05-19 Ryoda Sato トランス及びその製造方法、及び抵抗溶接装置
JPH05299266A (ja) * 1992-04-16 1993-11-12 Sony Corp 銅箔巻トランスの巻線構造及びその製造方法
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WO2014097673A1 (ja) 2014-06-26
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CN105122396B (zh) 2017-04-05
KR101638948B1 (ko) 2016-07-12
JP6054422B2 (ja) 2016-12-27
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