JP2001015350A - Coil device - Google Patents

Coil device

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Publication number
JP2001015350A
JP2001015350A JP11141151A JP14115199A JP2001015350A JP 2001015350 A JP2001015350 A JP 2001015350A JP 11141151 A JP11141151 A JP 11141151A JP 14115199 A JP14115199 A JP 14115199A JP 2001015350 A JP2001015350 A JP 2001015350A
Authority
JP
Japan
Prior art keywords
core member
core
transformer
base substrate
present
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP11141151A
Other languages
Japanese (ja)
Inventor
Yuji Sezai
勇司 瀬在
Shigetaka Maeyama
繁隆 前山
Masahiro Gamo
正浩 蒲生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Corp
Original Assignee
TDK Corp
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 TDK Corp filed Critical TDK Corp
Priority to JP11141151A priority Critical patent/JP2001015350A/en
Publication of JP2001015350A publication Critical patent/JP2001015350A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To improve heat radiation effect of divided cores of a transformer or choke coil to a metallic base substrate. SOLUTION: A core member wound with coils 1 and 2 is divided into an upper core member 3 and a lower core member 4, and the lower core member 4 is brought into contact with the metallic base substrate 5. This coil device is so constituted that h1>h2, where h1 is the distance from the metallic base substrate 5 to the joining surface between the lower core member 4 and upper core member 3, and h2 is the distance from the joining surface to the top part of the upper core member 3.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、トランスやチョー
クコイル等のコイル装置に係り、特にその巻線やコアの
金属ベース基板に対する冷却効果を向上させて温度上昇
を抑制するものに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil device such as a transformer and a choke coil, and more particularly to a device for improving the cooling effect of its windings and core on a metal base substrate to suppress a rise in temperature.

【0002】[0002]

【従来の技術】例えばDC−DCコンバータなどで使用
されるトランスは小型化が要望されており、これを実現
するために動作周波数をKHz〜MHzと高くしてコア
の断面積を小さくし、小型化することが行われてきた。
2. Description of the Related Art For example, a transformer used in a DC-DC converter or the like is required to be reduced in size. In order to realize this, the operating frequency is increased to KHz to MHz and the cross-sectional area of a core is reduced. Has been done.

【0003】しかし動作周波数の高周波化にともなって
表皮効果や近接効果により導体の一部領域にしか電流が
流れない現象が生じ銅損の増大が生じたり、ヒステリシ
ス損や渦電流損等による鉄損の増大が生じ、電源の効率
の低下及び温度上昇を引き起こす。
However, as the operating frequency increases, a phenomenon in which a current flows only in a part of the conductor due to a skin effect or a proximity effect occurs, causing an increase in copper loss or an iron loss due to hysteresis loss or eddy current loss. Increases, causing a decrease in power supply efficiency and an increase in temperature.

【0004】そしてこのような温度上昇によりコア材の
温度がキュリー温度以上になると、透磁率が大きく低下
してトランスとしての作用を失ってしまう。またトラン
ス温度の上昇により、コアのロスが大きくなり、コアの
熱暴走や、トランス周辺の電子部品や絶縁樹脂などの温
度上昇をもたらすといった問題点が生じてくる。さらに
温度上昇を抑えるために、冷却装置を設置することが必
要となってくる。
When the temperature of the core material becomes equal to or higher than the Curie temperature due to such a temperature rise, the magnetic permeability is greatly reduced and the function as a transformer is lost. In addition, a rise in the transformer temperature causes a loss of the core to increase, causing problems such as a thermal runaway of the core and a rise in the temperature of electronic components and insulating resin around the transformer. In order to further suppress the temperature rise, it is necessary to install a cooling device.

【0005】このようなトランスの温度上昇の対策とし
て、特開平3−62910号公報に記載されるように、
コアの表面に凹凸面を形成して放熱面積を増大させるこ
とや、特開平4−209509号公報に記載されるよう
に、コアと金属ベース基板との接触面の空隙に熱伝導率
の高い樹脂を充填してトランスの放熱性を高めること等
が行われてきた。またコアサイズを大きくして放熱面積
を増大させることも検討されてきた。
As a countermeasure against such a rise in the temperature of the transformer, as described in JP-A-3-62910,
The heat radiation area can be increased by forming an uneven surface on the surface of the core, or as described in JP-A-4-209509, a resin having a high thermal conductivity is formed in the gap between the contact surface between the core and the metal base substrate. To improve the heat dissipation of the transformer. It has also been considered to increase the heat dissipation area by increasing the core size.

【0006】[0006]

【発明が解決しようとする課題】このように、トランス
のコアの表面に凹凸面を設けることは、その形状が複雑
になるため作製が困難になるし、熱伝導率の高い樹脂を
充填することは余計に手間がかかりコスト高となる。ま
たコアのサイズを大きくすることは小型化という本来の
目的と逆行することになる。
Providing an uneven surface on the surface of the transformer core as described above makes it difficult to manufacture the transformer because of its complicated shape, and requires filling a resin with high thermal conductivity. Is time-consuming and expensive. Increasing the core size goes against the original purpose of miniaturization.

【0007】したがって本発明の目的は、このような問
題点を解決したトランスやチョークコイル等のコイル装
置を提供することである。
Accordingly, an object of the present invention is to provide a coil device such as a transformer or a choke coil which solves such a problem.

【0008】[0008]

【課題を解決するための手段】本発明の原理図を図1に
示す。図1において、1は1次巻線、2は2次巻線、3
は上部コア部材、4は下部コア部材、5は金属ベース基
板、6はトランスである。
FIG. 1 shows the principle of the present invention. In FIG. 1, 1 is a primary winding, 2 is a secondary winding, 3
Denotes an upper core member, 4 denotes a lower core member, 5 denotes a metal base substrate, and 6 denotes a transformer.

【0009】前記目的を達成するために、本発明では、
トランスやチョークコイルの如きコイル装置から発生す
る熱を、その下部コア部材4と金属ベース基板5とを接
触させて金属ベース基板5からも放熱させるとともに、
上部コアよりも下部コアの高さを大きくする。
To achieve the above object, the present invention provides:
Heat generated from a coil device such as a transformer or a choke coil is dissipated from the metal base substrate 5 by bringing the lower core member 4 into contact with the metal base substrate 5,
Increase the height of the lower core compared to the upper core.

【0010】これにより上部コアと下部コアとの、熱抵
抗の大きい接触面を上部コアと下部コアの中間位置より
も上の方に位置させることができるので、金属ベース基
板5と接触する放熱し易い下部コアの大きさを上部コア
の大きさよりも大きくすることができ、トランス等のコ
イル装置の放熱効果を向上させることができる。
As a result, the contact surface between the upper core and the lower core having a high thermal resistance can be located above the intermediate position between the upper core and the lower core. The size of the lower core, which is easy to make, can be made larger than the size of the upper core, and the heat radiation effect of a coil device such as a transformer can be improved.

【0011】[0011]

【発明の実施の形態】本発明の一実施の形態を図2にも
とづき説明する。図2は本発明の一実施の形態をトラン
スに実施した場合の断面図を示し、1は1次巻線、2は
2次巻線、3は上部コア部材、4は下部コア部材、5は
金属ベース基板、6はトランス、7はボビン、8はコア
留め具、9はネジである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view of a transformer according to an embodiment of the present invention, wherein 1 is a primary winding, 2 is a secondary winding, 3 is an upper core member, 4 is a lower core member, and 5 is A metal base substrate, 6 is a transformer, 7 is a bobbin, 8 is a core fastener, and 9 is a screw.

【0012】1次巻線1と2次巻線2はボビン7に巻回
され、E型コアを構成する上部コア部材3及び下部コア
部材4とともにトランス6を構成する。すなわち1次巻
線1と2次巻線2は、上部コア部材3及び下部コア部材
4の中心脚の周囲にボビン7を用いて巻回され、この上
部コア部材3及び下部コア部材4により必要なインダク
タンスが得られ、トランス6を構成する。そして上部コ
ア部材3と下部コア部材4の外周には弾性のコア留め具
8が配置され、ネジ9、9により金属ベース基板5にネ
ジ止めされることにより、図2に示す如く、このトラン
ス6が金属ベース基板5の所定位置にしっかりと固定さ
れる。これにより下部コア部材4と金属ベース基板5と
はしっかりと密着され、また上部コア部材3と下部コア
部材4も密着される。
The primary winding 1 and the secondary winding 2 are wound around a bobbin 7 and constitute a transformer 6 together with an upper core member 3 and a lower core member 4 constituting an E-shaped core. That is, the primary winding 1 and the secondary winding 2 are wound around the center legs of the upper core member 3 and the lower core member 4 by using the bobbin 7, and are required by the upper core member 3 and the lower core member 4. And the transformer 6 is formed. An elastic core fastener 8 is arranged on the outer periphery of the upper core member 3 and the lower core member 4, and is screwed to the metal base substrate 5 by screws 9, 9, thereby forming the transformer 6 as shown in FIG. Is firmly fixed to a predetermined position of the metal base substrate 5. Thereby, the lower core member 4 and the metal base substrate 5 are firmly adhered, and the upper core member 3 and the lower core member 4 are also closely adhered.

【0013】金属ベース基板5は、例えばアルミ板で構
成される。そしてトランスの1次巻線1の端子は、図示
省略した電源の入力側の回路に接続され、またトランス
の2次巻線2の端子は電源の出力側の回路に接続され
る。
The metal base substrate 5 is made of, for example, an aluminum plate. The terminal of the primary winding 1 of the transformer is connected to a circuit on the input side of a power supply (not shown), and the terminal of the secondary winding 2 of the transformer is connected to a circuit on the output side of the power supply.

【0014】このトランスの1次巻線1に高周波電力が
入力され、2次巻線2から変圧されて出力されるとき、
1次巻線1、2次巻線2及び上部コア部材3、下部コア
部材4に、それぞれ電力損失にもとづき発熱が生じる。
When high-frequency power is input to the primary winding 1 of the transformer and transformed and output from the secondary winding 2,
The primary winding 1, the secondary winding 2, the upper core member 3, and the lower core member 4 generate heat based on the power loss.

【0015】下部コア部材4に発生した熱は、主に金属
ベース基板5に伝達されてこれより放熱される。勿論一
部は大気中にも放熱する。上部コア部材3で発生した熱
は大気中に放熱するとともに下部コア部材4を経由して
金属ベース基板5から放熱される。また1次巻線1及び
2次巻線2で発生した熱は大気中に放熱されるとともに
各コア部材との間で熱伝達が行われ、前記の如く放熱さ
れる。
The heat generated in the lower core member 4 is mainly transmitted to the metal base substrate 5 and is radiated therefrom. Of course, a part also radiates heat to the atmosphere. The heat generated in the upper core member 3 is radiated to the atmosphere and is radiated from the metal base substrate 5 via the lower core member 4. Further, the heat generated in the primary winding 1 and the secondary winding 2 is radiated to the atmosphere and heat is transmitted between the core members, and radiated as described above.

【0016】このような上部コア部材3と下部コア部材
4とに別れたコアでは、一体型コアの場合に比較して分
割部分において熱抵抗が生じるために、上部コア部材3
で発生した熱が下部コア部材4を経由して金属ベース5
に伝達され難い。
In such a core divided into the upper core member 3 and the lower core member 4, since heat resistance is generated in the divided portion as compared with the case of the integral core, the upper core member 3
The heat generated in the metal base 5
It is difficult to be transmitted to.

【0017】そこで本発明では、トランス6に発生する
熱を下部コア部材4からより多く金属ベース基板5に伝
達してトランス6の温度上昇を抑えるために、後述する
図3(B)に示す従来のように、上部コア部材と下部コ
ア部材の高さが同一のものに対し、図2に示す如く、金
属ケース基板5からの全体のコアの高さをhとすると
き、下部コア部材4の高さh1 の割合を上部コア部材3
の高さh2 の割合よりも大きくした。すなわちh1 >h
2 とした(但しh=h1 +h2 )。
Therefore, in the present invention, in order to transfer more heat generated in the transformer 6 from the lower core member 4 to the metal base substrate 5 to suppress a rise in the temperature of the transformer 6, a conventional method shown in FIG. As shown in FIG. 2, when the height of the entire core from the metal case substrate 5 is h, as shown in FIG. The ratio of the height h 1 to the upper core member 3
The height h 2 is larger than the ratio. That is, h 1 > h
2 (where h = h 1 + h 2 ).

【0018】従って、この高さの大きい下部コア部材4
から多くの熱が金属ベース基板5より放熱されることに
なる。
Accordingly, the lower core member 4 having a large height
Therefore, much heat is radiated from the metal base substrate 5.

【0019】このように、下部コア部材4における熱が
これと接触している金属ベース基板5により放熱される
構造の場合下部コア部材4の割合を上部コア部材3の割
合よりも大きくすることにより放熱効果を高めることが
できる。
As described above, in the structure in which the heat in the lower core member 4 is radiated by the metal base substrate 5 in contact with the lower core member 4, the ratio of the lower core member 4 is made larger than that of the upper core member 3. The heat radiation effect can be enhanced.

【0020】本発明の放熱効果を確認するため、図3
(A)に示す如きタイプの、ティーディーケイ株式会社
製の高さ28mm、幅50mmのPQ型フェライトコア
を使用して、図3(B)に示す従来型のコアを使用した
場合と、同(C)に示す本発明のコアを使用した場合の
測定結果を説明する。なお、図3では、説明簡略のため
1次巻線、2次巻線及び金属ベース基板は省略してあ
る。そして入力側160V、駆動周波数100KHz、
出力側14.5V、負荷電流40A、室温25℃におい
て、図4(A)に示す各部の温度を金属ベース基板との
温度差ΔT(℃)にもとづき測定した。なお図3におい
て、13は上部コア部材、14は下部コア部材を示す。
In order to confirm the heat radiation effect of the present invention, FIG.
FIG. 3 (B) shows a PQ ferrite core having a height of 28 mm and a width of 50 mm manufactured by TDK Co., Ltd. of the type shown in FIG. The measurement result when the core of the present invention shown in (C) is used will be described. In FIG. 3, the primary winding, the secondary winding, and the metal base substrate are omitted for simplification of description. And input side 160V, drive frequency 100KHz,
At an output side of 14.5 V, a load current of 40 A, and a room temperature of 25 ° C., the temperature of each part shown in FIG. 4A was measured based on the temperature difference ΔT (° C.) from the metal base substrate. In FIG. 3, 13 indicates an upper core member, and 14 indicates a lower core member.

【0021】なお、図4において、コア上部は、図4
(B)、(C)における上部コア部材13のA点を、コ
ア中央部はB点を、コア下部は下部コア部材14のC点
をそれぞれ測定したものである。
In FIG. 4, the upper part of the core corresponds to FIG.
(B) and (C), the point A of the upper core member 13 is measured at the center of the core, the point B is measured at the lower part of the core, and the point C of the lower core member 14 is measured.

【0022】実際の測定に際しては、電源を動作させ、
各部の温度が安定したとき、トランスの1次巻線、2次
巻線及び上部コア部材、下部コア部材の各点と金属ベー
ス基板との温度差を熱電対により測定した。
In the actual measurement, the power supply is operated,
When the temperature of each part became stable, the temperature difference between each point of the primary winding, the secondary winding, the upper core member, and the lower core member of the transformer and the metal base substrate was measured by a thermocouple.

【0023】これにより図4(A)に示す如く、本発明
においてはすべての測定点において従来のものより放熱
効果のあることが明らかである。特にコア中央部分で放
熱効果のすぐれていることがわかる。
Thus, as shown in FIG. 4A, it is clear that the present invention has a more effective heat radiation effect at all measurement points than the conventional one. In particular, it can be seen that the heat radiation effect is excellent in the central portion of the core.

【0024】また前記h1 とh(h=h1 +h2 )の割
合を変更した場合の測定値を図4(B)に示す。これに
よれば下部コア高さ(h1 )/コア全体高さ(h)の値
が0.5の部分が従来例を示し、それより右側の値が本
発明の場合を示しているが、これによるも本発明の放熱
効果のすぐれていること、特にその中央部ですぐれてい
ることがわかる。
FIG. 4B shows the measured values when the ratio between h 1 and h (h = h 1 + h 2 ) is changed. According to this, the portion where the value of the lower core height (h 1 ) / the whole core height (h) is 0.5 indicates the conventional example, and the value on the right side thereof indicates the case of the present invention. This also indicates that the heat radiation effect of the present invention is excellent, especially at the center thereof.

【0025】このように、本発明のように、トランスの
上部コア部材に対する下部コア部材の高さの割合を、従
来の如く、等分よりも大きくすることにより、コア各部
での温度上昇の低減が可能となり、さらにこのようなコ
ア温度の低減により巻線の温度も低減することができ
る。
As described above, as in the present invention, the ratio of the height of the lower core member to the upper core member of the transformer is made larger than the conventional one, so that the temperature rise in each part of the core can be reduced. And the temperature of the windings can be reduced by such a reduction in the core temperature.

【0026】すなわち本発明のコアを用いることによ
り、トランス全体の温度上昇を抑えることができた。ま
た図4(B)に示す如く、下部コア部材の占める高さの
割合を大きくするほど、各コア部材での温度が低減する
ことがわかった。従って本発明のコアを用いれば、従来
の高周波電力用トランスよりもコアを大きくする必要が
なく、トランスの小型化を図ることができる。しかも本
発明では、従来のコアの高さの割合を変えているだけで
あり、コアの作製に余分な手間がかかることはない。
That is, by using the core of the present invention, the temperature rise of the entire transformer could be suppressed. Further, as shown in FIG. 4B, it was found that as the proportion of the height occupied by the lower core member was increased, the temperature of each core member was reduced. Therefore, if the core of the present invention is used, it is not necessary to make the core larger than a conventional high-frequency power transformer, and the size of the transformer can be reduced. Moreover, in the present invention, only the ratio of the height of the conventional core is changed, and no extra labor is required for manufacturing the core.

【0027】本発明のコアを用いた場合、例えばコア温
度によってコアロスが変化するようなコア材において、
コア温度の低減によってコアロスが減少するような条
件、例えば図5のような特性を有するフェライト材にお
ける領域Aで電源トランスを動作させるようなとき、従
来の場合はA2 点で動作していたものが本発明によれば
1 点で動作させることができ、コアロスを低下させる
ことができるので、電源の効率も向上させるとともに、
さらにトランスの温度上昇も抑えることができる。
When the core of the present invention is used, for example, in a core material whose core loss changes depending on the core temperature,
Conditions such as core loss is reduced by reducing the core temperature, for example, when the area A in the ferrite material having a characteristic as shown in FIG. 5 as to operate the power transformer, as is the conventional case was operating at two points A There can be operated by a 1 point, according to the present invention, it is possible to reduce the core loss, along with also improves efficiency of the power supply,
Further, a rise in the temperature of the transformer can be suppressed.

【0028】本発明はトランスのみに限定されるもので
はなく、チョークコイルに適用しても同様の効果が得ら
れる。図6に本発明をチョークコイル20に適用した例
を示す。図6において、21はコイル、22はボビン、
23は上部コア部材、24は下部コア部材、25はコア
留め具、26はネジ、27は金属ベース基板である。
The present invention is not limited to a transformer alone, and similar effects can be obtained by applying the present invention to a choke coil. FIG. 6 shows an example in which the present invention is applied to a choke coil 20. In FIG. 6, 21 is a coil, 22 is a bobbin,
23 is an upper core member, 24 is a lower core member, 25 is a core fastener, 26 is a screw, and 27 is a metal base substrate.

【0029】チョークコイル20は、ボビン22に巻回
されたコイル21を上部コア部材23及び下部コア部材
24により構成されたコアに装着し、コア留め具25と
ネジ26、26により金属ベース基板27と下部コア部
材24とが密着するように固定される。このとき、前記
と同じく、下部コア部材24の高さ方向の割合が上部コ
ア部材23の割合よりも大きく構成されているので、前
記のトランスと同様に放熱効果が向上される。
In the choke coil 20, a coil 21 wound around a bobbin 22 is mounted on a core constituted by an upper core member 23 and a lower core member 24, and a metal base board 27 is fixed by a core fastener 25 and screws 26, 26. And the lower core member 24 are fixed so as to be in close contact with each other. At this time, as in the above case, the lower core member 24 is configured so that the ratio in the height direction is higher than the ratio of the upper core member 23, so that the heat radiation effect is improved as in the case of the transformer.

【0030】図6(B)にその放熱効果を示すため、コ
ア上部、コア中央部、コア下部における金属ベース基板
との温度差の測定値を示す。なお図6(B)のコアサイ
ズは前記と同等のものを使用し、電流は80Aであっ
た。これにより、本発明は、トランスのみならずチョー
クコイルにおいても有効であることがわかる。
FIG. 6B shows measured values of the temperature difference between the metal base substrate in the upper part of the core, the central part of the core, and the lower part of the core in order to show the heat radiation effect. The core size shown in FIG. 6B was the same as that described above, and the current was 80 A. This shows that the present invention is effective not only in a transformer but also in a choke coil.

【0031】このように本発明のトランスやチョークコ
イルにおいては、その温度上昇の低減により、コア材が
キュリー温度以上に達して透磁率が大きく低下するとい
ったことが生じにくくなる。
As described above, in the transformer and the choke coil of the present invention, the reduction in the temperature rise makes it difficult for the core material to reach the Curie temperature or higher and the magnetic permeability to be greatly reduced.

【0032】トランスやチョークコイルの温度上昇の低
減により、コアの熱暴走を防止することができる。また
トランス周辺の耐熱性に限度のある電子部品や絶縁樹脂
の温度上昇を低減することができる。さらに冷却装置の
駆動に費やすエネルギーも減少させることができる。
The thermal runaway of the core can be prevented by reducing the temperature rise of the transformer and the choke coil. Further, it is possible to reduce an increase in the temperature of electronic components or insulating resin having heat resistance around the transformer. Further, the energy consumed for driving the cooling device can be reduced.

【0033】本発明は、コアがフェライトやPQ型に限
定されるものではなく、フェライト以外のコアでもまた
EE型、UU型等その他のタイプのものでも同様に適用
できる。
The present invention is not limited to cores of ferrite or PQ type, but can be applied to cores other than ferrite and other types such as EE type and UU type.

【0034】[0034]

【発明の効果】本発明によれば放熱効果を向上すること
ができるので、コア各部及び巻線各部での温度を低減す
ることができる。従ってコアを大きくする必要がなく、
トランスやチョークコイル等のコイル装置の小型化を図
ることができる。
According to the present invention, the heat radiation effect can be improved, so that the temperature at each part of the core and each part of the winding can be reduced. Therefore, there is no need to enlarge the core,
The size of a coil device such as a transformer or a choke coil can be reduced.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の原理図である。FIG. 1 is a principle diagram of the present invention.

【図2】本発明の一実施の形態である。FIG. 2 is an embodiment of the present invention.

【図3】本発明に関する測定に使用したコアの説明図で
ある。
FIG. 3 is an explanatory diagram of a core used for measurement according to the present invention.

【図4】本発明をトランスに適用した場合の測定値であ
る。
FIG. 4 shows measured values when the present invention is applied to a transformer.

【図5】フェライトを使用したときの特性図兼本発明の
メリット説明図である。
FIG. 5 is a characteristic diagram when a ferrite is used and a diagram for explaining the merits of the present invention.

【図6】本発明をチョークコイルに使用した場合の構成
及び特性測定図である。
FIG. 6 is a configuration and characteristic measurement diagram when the present invention is used for a choke coil.

【符号の説明】[Explanation of symbols]

1 1次巻線 2 2次巻線 3 上部コア部材 4 下部コア部材 5 金属ベース基板 6 トランス 7 ボビン 8 コア留め具 9 ネジ DESCRIPTION OF SYMBOLS 1 Primary winding 2 Secondary winding 3 Upper core member 4 Lower core member 5 Metal base substrate 6 Transformer 7 Bobbin 8 Core fastener 9 Screw

───────────────────────────────────────────────────── フロントページの続き (72)発明者 蒲生 正浩 東京都中央区日本橋一丁目13番1号 ティ ーディーケイ株式会社内 Fターム(参考) 5E050 JA01  ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masahiro Gamo 1-13-1, Nihonbashi, Chuo-ku, Tokyo FTD term (reference) 5E050 JA01

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】コイルを巻回したコア部材が上部コア部材
と下部コア部材とに分割され、前記下部コア部材を金属
ベース基板と密着させたコイル装置において、 金属ベース基板から前記下部コア部材と上部コア部材と
の接合面までの距離をh1 とし、この接合面から前記上
部コア部材の最上部までの距離をh2 としたとき、h1
>h2 となるように構成したことを特徴とするコイル装
置。
1. A coil device in which a core member wound with a coil is divided into an upper core member and a lower core member, and the lower core member is brought into close contact with a metal base substrate. when the distance to the junction surface of the upper core member and h 1, the distance from the junction surface to the top of the upper core member and a h 2, h 1
> Coil means characterized by being configured so that h 2.
JP11141151A 1999-04-27 1999-05-21 Coil device Pending JP2001015350A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11141151A JP2001015350A (en) 1999-04-27 1999-05-21 Coil device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP11977299 1999-04-27
JP11-119772 1999-04-27
JP11141151A JP2001015350A (en) 1999-04-27 1999-05-21 Coil device

Publications (1)

Publication Number Publication Date
JP2001015350A true JP2001015350A (en) 2001-01-19

Family

ID=26457447

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11141151A Pending JP2001015350A (en) 1999-04-27 1999-05-21 Coil device

Country Status (1)

Country Link
JP (1) JP2001015350A (en)

Cited By (10)

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EP1722611A3 (en) * 2005-04-25 2008-02-20 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Electronic device with an electrical coil
JP2009088251A (en) * 2007-09-28 2009-04-23 Tdk Corp Core and transformer using the same, and switching power supply
JP2009088250A (en) * 2007-09-28 2009-04-23 Tdk Corp Core and transformer using the same, and switching power supply
JP2011077304A (en) * 2009-09-30 2011-04-14 Fdk Corp Inductance component for large power
JP2012134424A (en) * 2010-12-24 2012-07-12 Toyota Industries Corp Induction apparatus
JP2012204814A (en) * 2011-03-28 2012-10-22 Tdk Corp Core, transformer, choke coil and switching power supply device
JP2012238743A (en) * 2011-05-12 2012-12-06 Mitsubishi Electric Corp Power supply device
JP2013089774A (en) * 2011-10-18 2013-05-13 Toyota Industries Corp Induction apparatus
CN103177852A (en) * 2011-12-22 2013-06-26 株式会社丰田自动织机 Induction element and induction device
JP2016127109A (en) * 2014-12-26 2016-07-11 ダイキン工業株式会社 Reactor cooling structure

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1722611A3 (en) * 2005-04-25 2008-02-20 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Electronic device with an electrical coil
JP2009088251A (en) * 2007-09-28 2009-04-23 Tdk Corp Core and transformer using the same, and switching power supply
JP2009088250A (en) * 2007-09-28 2009-04-23 Tdk Corp Core and transformer using the same, and switching power supply
JP2011077304A (en) * 2009-09-30 2011-04-14 Fdk Corp Inductance component for large power
US8922313B2 (en) 2010-12-24 2014-12-30 Kabushiki Kaisha Toyota Jidoshokki Induction device
JP2012134424A (en) * 2010-12-24 2012-07-12 Toyota Industries Corp Induction apparatus
JP2012204814A (en) * 2011-03-28 2012-10-22 Tdk Corp Core, transformer, choke coil and switching power supply device
JP2012238743A (en) * 2011-05-12 2012-12-06 Mitsubishi Electric Corp Power supply device
US8902032B2 (en) 2011-10-18 2014-12-02 Kabushiki Kaisha Toyota Jidoshokki Induction device
JP2013089774A (en) * 2011-10-18 2013-05-13 Toyota Industries Corp Induction apparatus
CN103177852A (en) * 2011-12-22 2013-06-26 株式会社丰田自动织机 Induction element and induction device
JP2013131719A (en) * 2011-12-22 2013-07-04 Toyota Industries Corp Inductive element and induction device
JP2016127109A (en) * 2014-12-26 2016-07-11 ダイキン工業株式会社 Reactor cooling structure

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