JP6619926B2

JP6619926B2 - Combined reactor

Info

Publication number: JP6619926B2
Application number: JP2014195631A
Authority: JP
Inventors: 哲橋野; 暁藤田; 晃義小松崎; 倫也山岸; 昌浩島田
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2014-09-25
Filing date: 2014-09-25
Publication date: 2019-12-11
Anticipated expiration: 2034-09-25
Also published as: JP2016066744A

Description

本発明は、周囲に発生する漏れ磁束が小さな複合型リアクトルに関する。 The present invention relates to a composite reactor having a small leakage magnetic flux generated around the present invention.

特許文献１には、昇圧装置用複合型リアクトル及び昇圧装置が開示されている。この昇圧装置用複合型リアクトルは、コア（第１磁脚及び第２磁脚と、中央磁脚と、第１磁継部及び第２磁継部）と、第１巻線及び第２巻線とから構成される。第１巻線はコアの第１磁継部に巻回され、第２巻線はコアの第２磁継部に巻回されている。また、第１磁継部及び第２磁継部には空隙が配設されている。 Patent Document 1 discloses a composite reactor for a booster device and a booster device. The booster composite reactor includes a core (first magnetic leg and second magnetic leg, central magnetic leg, first magnetic joint part and second magnetic joint part), first winding and second winding. It consists of. The first winding is wound around the first magnetic connection portion of the core, and the second winding is wound around the second magnetic connection portion of the core. In addition, a gap is provided in the first magnetic connection portion and the second magnetic connection portion.

当該複合型リアクトルを昇圧装置に用いて駆動した場合、第１巻線及び第２巻線の周囲には、入力電流に比例した磁束が発生する。第１巻線の周囲に発生する磁束は第１磁脚内に形成される第１磁路以外に、第２磁脚内を通過する第１漏れ磁路へも流れようとする。しかし、第１磁路に、４つの空隙が配設されているのに対し、第１漏れ磁路には、８つの空隙が配設されて、第１磁路より磁気抵抗が非常に大きく、第１漏れ磁路の磁束は、第１磁路の磁束に較べ著しく少なくなる。第２巻線の発生する磁束においても、第２磁路に対して第２漏れ磁路の磁束を空隙により少なくしている。その結果、第１巻線と第２巻線との間の磁気的な相互影響を抑制して、それぞれ独立したリアクトルとして動作することができる。 When the composite reactor is driven using a booster, a magnetic flux proportional to the input current is generated around the first winding and the second winding. The magnetic flux generated around the first winding tends to flow not only to the first magnetic path formed in the first magnetic leg but also to the first leakage magnetic path passing through the second magnetic leg. However, while four gaps are arranged in the first magnetic path, eight gaps are arranged in the first leakage magnetic path, and the magnetic resistance is much larger than the first magnetic path, The magnetic flux in the first leakage magnetic path is significantly less than the magnetic flux in the first magnetic path. Also in the magnetic flux generated by the second winding, the magnetic flux of the second leakage magnetic path is reduced by the air gap with respect to the second magnetic path. As a result, the magnetic mutual influence between the first winding and the second winding can be suppressed, and each can operate as an independent reactor.

特開２００５−８０４４２号公報JP 2005-80442 A

特許文献１の複合型リアクトルは、第１巻線と第２巻線との間の磁気的な相互影響を抑制して、それぞれ独立したリアクトルとして動作可能な構成であるが、リアクトルの周囲に発生する漏れ磁束を抑制するための対策については何ら講じられていない。このため、特許文献１の複合型リアクトルを昇圧装置に用いて駆動すると、当該複合型リアクトルの周囲に発生した漏れ磁束が、昇圧装置の構成要素の内、磁束の影響を受けやすい素子（例えば、電流センサやパルストランス方式の絶縁素子等）に望ましくない影響を与える可能性がある。 The composite reactor of Patent Document 1 is configured to be able to operate as an independent reactor while suppressing the magnetic mutual influence between the first winding and the second winding, but is generated around the reactor. No measures have been taken to suppress leakage magnetic flux. For this reason, when the composite reactor of Patent Document 1 is driven using a booster device, leakage magnetic flux generated around the composite reactor is an element that is susceptible to magnetic flux among the components of the booster device (for example, Current sensor, pulse transformer type insulation element, etc.).

本発明の目的は、周囲に発生する漏れ磁束を低減可能な複合型リアクトルを提供することである。 An object of the present invention is to provide a composite reactor capable of reducing leakage magnetic flux generated around.

上記の目的を達成するために、請求項１に記載の発明は、
一端が共通の電源に接続される第１コイル（例えば、後述の実施形態でのコイル１２）及び第２コイル（例えば、後述の実施形態でのコイル１３）と、
前記第１コイル及び前記第２コイルが巻回された矩形ループ状の磁性コア（例えば、後述の実施形態での磁性コア１１）と、を備えた、インターリーブ型のＤＣ／ＤＣコンバータに用いられる複合型リアクトル（例えば、後述の実施形態での複合型リアクトル１０）であって、
前記磁性コアは、前記第１コイルの巻線が巻回される略Ｕ字状の第１コア部（例えば、後述の実施形態での第１コア部１１ａ）と、前記第２コイルの巻線が巻回される略Ｕ字状の第２コア部（例えば、後述の実施形態での第２コア部１１ｂ）とが、巻線中心軸方向から見て対向する端面が重なる位置に配置されており、
前記第１コイルは、前記第１コア部の対向する２辺を構成する巻回部に分割巻きされた第１巻線部（例えば、後述の実施形態での第１巻線部１２ａ）及び第２巻線部（例えば、後述の実施形態での第２巻線部１２ｂ）を有し、
前記第２コイルは、前記第２コア部の対向する２辺を構成する巻回部に分割巻きされた第３巻線部（例えば、後述の実施形態での第３巻線部１３ａ）及び第４巻線部（例えば、後述の実施形態での第４巻線部１３ｂ）を有し、
前記第１コア部の前記第１巻線部が巻回された巻回部側の端面と、前記第２コア部の前記第３巻線部が巻回された巻回部側の端面とが重なる位置に配置され、
前記第１コア部の前記第２巻線部が巻回された巻回部側の端面と、前記第２コア部の前記第４巻線部が巻回された巻回部側の端面とが重なる位置に配置され、
前記第１巻線部の一端及び前記第３巻線部の一端は、前記電源に接続され、
前記第１巻線部の他端及び前記第３巻線部の他端は、それぞれ前記第２巻線部の一端及び第４巻線部の一端に接続され、
前記第１コア部は、前記第１巻線部から突出する第１コア端部と、前記第２巻線部から突出する第２コア端部と、を有し、
前記第２コア部は、前記第３巻線部から突出する第３コア端部と、前記第４巻線部から突出する第４コア端部と、を有し、
前記第１巻線部は、巻線中心軸方向の一方向を見て時計回りと反時計回りの内の一方の巻回方向で巻回され、
前記第２巻線部は、巻線中心軸方向の前記一方向を見て時計回りと反時計回りの内の他方の巻回方向で巻回され、
前記第３巻線部は、巻線中心軸方向の前記一方向を見て時計回りと反時計回りの内の前記他方の巻回方向で巻回され、
前記第４巻線部は、巻線中心軸方向の前記一方向を見て時計回りと反時計回りの内の前記一方の巻回方向で巻回される。
請求項２に記載の発明は、
一端が共通の電源に接続される第１コイル（例えば、後述の実施形態でのコイル１２）及び第２コイル（例えば、後述の実施形態でのコイル１３）と、
前記第１コイル及び前記第２コイルが巻回された矩形ループ状の磁性コア（例えば、後述の実施形態での磁性コア１１）と、を備えた、インターリーブ型のＤＣ／ＤＣコンバータに用いられる複合型リアクトル（例えば、後述の実施形態での複合型リアクトル１０）であって、
前記磁性コアは、
前記第１コイルの巻線が巻回される略Ｕ字状の第１コア部（例えば、後述の実施形態での第１コア部１１ａ）と、
前記第２コイルの巻線が巻回される略Ｕ字状の第２コア部（例えば、後述の実施形態での第２コア部１１ｂ）とが、巻線中心軸方向から見て対向する端面が重なる位置に配置されており、
前記第１コイルは、前記第１コア部の対向する２辺を構成する巻回部に分割巻きされた第１巻線部（例えば、後述の実施形態での第１巻線部１２ａ）及び第２巻線部（例えば、後述の実施形態での第２巻線部１２ｂ）を有し、
前記第１巻線部及び前記第２巻線部は、前記第１コイルの周囲に発生磁束が互いに打ち消し合う向きにそれぞれ配設され、
前記第２コイルは、前記第２コア部の対向する２辺を構成する巻回部に分割巻きされた第３巻線部（例えば、後述の実施形態での第３巻線部１３ａ）及び第４巻線部（例えば、後述の実施形態での第４巻線部１３ｂ）を有し、
前記第３巻線部及び前記第４巻線部は、前記第２コイルの周囲に発生磁束が互いに打ち消し合う向きにそれぞれ配設され、
前記第１コア部の前記第１巻線部が巻回された巻回部側の端面と、前記第２コア部の前記第３巻線部が巻回された巻回部側の端面とが重なる位置に配置され、
前記第１コア部の前記第２巻線部が巻回された巻回部側の端面と、前記第２コア部の前記第４巻線部が巻回された巻回部側の端面とが重なる位置に配置され、
前記第１巻線部の一端及び前記第３巻線部の一端は、前記電源に接続され、
前記第１巻線部の他端及び前記第３巻線部の他端は、それぞれ前記第２巻線部の一端及び第４巻線部の一端に接続され、
前記第１コア部は、前記第１巻線部から突出する第１コア端部と、前記第２巻線部から突出する第２コア端部と、を有し、
前記第２コア部は、前記第３巻線部から突出する第３コア端部と、前記第４巻線部から突出する第４コア端部と、を有し、
前記第１巻線部及び前記第３巻線部は、
前記第１巻線部のの前記一端から前記他端へ電流が流れた際に、前記第１コア部に発生する磁束の向きと、
前記第３巻線部の前記一端から前記他端へ電流が流れた際に、前記第２コア部に発生する磁束の向きと、が相反するように巻回され、
前記第２巻線部及び前記第４巻線部は、
前記第２巻線部の前記一端から前記他端へ電流が流れた際に、前記第１コア部に発生する磁束の向きと、
前記第４巻線部の前記一端から前記他端へ電流が流れた際に、前記第２コア部に発生する磁束の向きと、が相反するように巻回されている。
請求項３に記載の発明は、請求項１又は２に記載の発明において、
前記第１コイルと前記第２コイルとには、互いに位相のずれた電流が入力される。 In order to achieve the above object, the invention described in claim 1
A first coil (for example, a coil 12 in an embodiment described later) and a second coil (for example, a coil 13 in an embodiment described later), one end of which is connected to a common power source ;
A composite used for an interleaved DC / DC converter comprising a rectangular loop-shaped magnetic core (for example, a magnetic core 11 in an embodiment described later) around which the first coil and the second coil are wound. A type reactor (for example, a composite type reactor 10 in an embodiment described later),
The magnetic core includes a substantially U-shaped first core portion (for example, a first core portion 11a in an embodiment described later) around which the winding of the first coil is wound, and a winding of the second coil. The substantially U-shaped second core part (for example, the second core part 11b in the embodiment described later) wound around is disposed at a position where the end faces facing each other when viewed from the winding central axis direction overlap. And
The first coil includes a first winding portion (for example, a first winding portion 12a in an embodiment described later) and a first winding portion that are separately wound around winding portions constituting two opposing sides of the first core portion . 2 winding parts (for example, the 2nd winding part 12b in the below-mentioned embodiment),
The second coil includes a third winding portion (for example, a third winding portion 13a in an embodiment described later) and a second winding portion that are separately wound around winding portions constituting two opposing sides of the second core portion . It has 4 winding parts (for example, the 4th winding part 13b in the below-mentioned embodiment),
An end surface on the winding portion side where the first winding portion of the first core portion is wound and an end surface on the winding portion side where the third winding portion of the second core portion is wound. Placed in overlapping positions,
An end surface on the winding portion side where the second winding portion of the first core portion is wound, and an end surface on the winding portion side where the fourth winding portion of the second core portion is wound. Placed in overlapping positions,
One end of the first winding part and one end of the third winding part are connected to the power source,
The other end of the first winding part and the other end of the third winding part are connected to one end of the second winding part and one end of the fourth winding part, respectively.
The first core portion has a first core end portion protruding from the first winding portion, and a second core end portion protruding from the second winding portion,
The second core portion has a third core end portion protruding from the third winding portion, and a fourth core end portion protruding from the fourth winding portion,
The first winding portion is wound in one winding direction of clockwise and counterclockwise when viewed in one direction of the winding central axis direction,
The second winding portion is wound in the other winding direction of clockwise and counterclockwise when viewed in the one direction of the winding central axis direction,
The third winding portion is wound in the other winding direction of clockwise and counterclockwise when viewed in the one direction of the winding central axis direction,
The fourth winding portion is wound in one of the clockwise and counterclockwise winding directions as viewed in the one direction in the winding central axis direction.
The invention described in claim 2
A first coil (for example, a coil 12 in an embodiment described later) and a second coil (for example, a coil 13 in an embodiment described later), one end of which is connected to a common power source ;
A composite used for an interleaved DC / DC converter comprising a rectangular loop-shaped magnetic core (for example, a magnetic core 11 in an embodiment described later) around which the first coil and the second coil are wound. A type reactor (for example, a composite type reactor 10 in an embodiment described later),
The magnetic core is
A substantially U-shaped first core portion (for example, a first core portion 11a in an embodiment described later) around which the winding of the first coil is wound;
An end surface facing the substantially U-shaped second core portion (for example, the second core portion 11b in the embodiment described later) around which the winding of the second coil is wound as viewed from the winding central axis direction. Are arranged at the overlapping position,
The first coil includes a first winding portion (for example, a first winding portion 12a in an embodiment described later) and a first winding portion that are separately wound around winding portions constituting two opposing sides of the first core portion . 2 winding parts (for example, the 2nd winding part 12b in the below-mentioned embodiment),
The first winding portion and the second winding portion are respectively arranged in directions in which generated magnetic fluxes cancel each other around the first coil,
The second coil includes a third winding portion (for example, a third winding portion 13a in an embodiment described later) and a second winding portion that are separately wound around winding portions constituting two opposing sides of the second core portion . It has 4 winding parts (for example, the 4th winding part 13b in the below-mentioned embodiment),
The third winding portion and the fourth winding portion are respectively arranged in directions in which generated magnetic fluxes cancel each other around the second coil,
An end surface on the winding portion side where the first winding portion of the first core portion is wound and an end surface on the winding portion side where the third winding portion of the second core portion is wound. Placed in overlapping positions,
An end surface on the winding portion side where the second winding portion of the first core portion is wound, and an end surface on the winding portion side where the fourth winding portion of the second core portion is wound. Placed in overlapping positions,
One end of the first winding part and one end of the third winding part are connected to the power source,
The other end of the first winding part and the other end of the third winding part are connected to one end of the second winding part and one end of the fourth winding part, respectively.
The first core portion has a first core end portion protruding from the first winding portion, and a second core end portion protruding from the second winding portion,
The second core portion has a third core end portion protruding from the third winding portion, and a fourth core end portion protruding from the fourth winding portion,
The first winding part and the third winding part are:
When a current flows from the one end of the first winding part to the other end, the direction of magnetic flux generated in the first core part,
When a current flows from the one end of the third winding portion to the other end, the direction of the magnetic flux generated in the second core portion is wound so as to be opposite to each other,
The second winding portion and the fourth winding portion are:
When a current flows from the one end of the second winding part to the other end, the direction of magnetic flux generated in the first core part,
When the current flows from the one end to the other end of the fourth winding portion , the winding is wound so that the direction of the magnetic flux generated in the second core portion is opposite.
The invention according to claim 3 is the invention according to claim 1 or 2,
The first coil and the second coil are supplied with currents that are out of phase with each other.

請求項４に記載の発明は、請求項１から３のいずれか一項に記載の発明において、
前記第１巻線部の巻線中心軸（例えば、後述の実施形態での巻線中心軸Ｚ１１，Ｚ４１）と前記第３巻線部の巻線中心軸（例えば、後述の実施形態での巻線中心軸Ｚ１３，Ｚ４３）とが共通し、かつ、前記第２巻線部の巻線中心軸（例えば、後述の実施形態での巻線中心軸Ｚ１２，Ｚ４２）と前記第４巻線部の巻線中心軸（例えば、後述の実施形態での巻線中心軸Ｚ１４，Ｚ４４）とが共通する。 The invention according to claim 4 is the invention according to any one of claims 1 to 3 ,
The winding center axis of the first winding part (for example, winding center axes Z11 and Z41 in the embodiment described later) and the winding center axis of the third winding part (for example, winding in the embodiment described later) Line center axes Z13 and Z43) and the winding center axis of the second winding part (for example, winding center axes Z12 and Z42 in the embodiments described later) and the fourth winding part. The winding center axis (for example, winding center axes Z14 and Z44 in the embodiments described later) is common.

請求項５に記載の発明は、請求項１から４のいずれか一項に記載の発明において、
前記第１巻線部の巻線中心軸（例えば、後述の実施形態での巻線中心軸Ｚ１１，Ｚ４１，Ｚ５１）と前記第２巻線部の巻線中心軸（例えば、後述の実施形態での巻線中心軸Ｚ１２，Ｚ４２，Ｚ５２）とが互いに平行であり、前記第３巻線部の巻線中心軸（例えば、後述の実施形態での巻線中心軸Ｚ１３，Ｚ４３，Ｚ５３）と前記第４巻線部の巻線中心軸（例えば、後述の実施形態での巻線中心軸Ｚ１４，Ｚ４４，Ｚ５４）とが互いに平行である。 The invention according to claim 5 is the invention according to any one of claims 1 to 4 ,
The winding center axis (for example, winding center axes Z11, Z41, Z51 in the embodiments described later) and the winding center axis (for example, in embodiments described later) of the first winding section. Winding center axes Z12, Z42, Z52) are parallel to each other, and the winding center axes of the third winding portion (for example, winding center axes Z13, Z43, Z53 in the embodiments described later) and the above Winding central axes (for example, winding central axes Z14, Z44, Z54 in the embodiments described later) of the fourth winding part are parallel to each other.

請求項６に記載の発明は、請求項１から５のいずれか一項に記載の発明において、
前記第１巻線部、前記第２巻線部、前記第３巻線部及び前記第４巻線部の各巻線中心軸（例えば、後述の実施形態での巻線中心軸Ｚ１１〜Ｚ１４，Ｚ２１〜Ｚ２４）が同一平面上に含まれる。 The invention according to claim 6 is the invention according to any one of claims 1 to 5 ,
Winding center axes of the first winding part, the second winding part, the third winding part, and the fourth winding part (for example, winding center axes Z11 to Z14, Z21 in the embodiments described later) ~ Z24) are included on the same plane.

請求項７に記載の発明は、請求項１から６のいずれか一項に記載の発明において、
前記第１コイルにより生じる磁束の前記磁性コアでの磁路長と、前記第２コイルにより生じる磁束の前記磁性コアでの磁路長とは等しい。 The invention according to claim 7 is the invention according to any one of claims 1 to 6 ,
The magnetic path length of the magnetic flux generated by the first coil in the magnetic core is equal to the magnetic path length of the magnetic flux generated by the second coil in the magnetic core.

請求項８に記載の発明は、請求項７に記載の発明において、
前記第１コイルにより生じる磁束の前記磁性コアでの磁路及び前記第２コイルにより生じる磁束の前記磁性コアでの磁路は、矩形ループ状の共通形状を有する。 The invention according to claim 8 is the invention according to claim 7 ,
The magnetic path of the magnetic flux generated by the first coil in the magnetic core and the magnetic path of the magnetic flux generated by the second coil in the magnetic core have a common shape of a rectangular loop.

請求項９に記載の発明は、請求項１から８のいずれか一項に記載の発明において、
前記第１コア部及び前記第２コア部はそれぞれ同形状に形成され、前記第１コア部と前記第２コア部とを組み合わせて前記磁性コアを構成する。 The invention according to claim 9 is the invention according to any one of claims 1 to 8 ,
The first core portion and the second core portion are formed in the same shape, and the magnetic core is configured by combining the first core portion and the second core portion.

請求項１の発明及び請求項２の発明によれば、第１コイルの分割巻きされた第１巻線部及び第２巻線部の周囲に発生する磁束が互いに打ち消し合うことで、第１コイルの周囲の漏れ磁束を低減できる。同様に、第２コイルの分割巻きされた第３巻線部及び第４巻線部の周囲に発生する磁束が互いに打ち消し合うことで、第２コイルの周囲の漏れ磁束を低減できる。さらに、第１コイルによる第１コア部における磁束の向きと、第２コイルによる第２コア部における磁束の向きが相反するため、磁性コアの磁気飽和が起こりにくくなり、本発明に係る複合型リアクトルは、磁気結合型リアクトルとして十分に機能する。 According to the invention of claim 1 and the invention of claim 2, by magnetic flux generated around the first winding part divided winding of the first coil and the second coil portion cancel each other, the first coil Leakage magnetic flux around can be reduced. Similarly, the leakage magnetic flux around the second coil can be reduced by canceling out the magnetic fluxes generated around the third winding portion and the fourth winding portion that are separately wound around the second coil. Furthermore, since the direction of the magnetic flux in the first core portion by the first coil and the direction of the magnetic flux in the second core portion by the second coil are in conflict, magnetic saturation of the magnetic core is less likely to occur, and the composite reactor according to the present invention is achieved. Sufficiently functions as a magnetically coupled reactor.

請求項４の発明によれば、各コイルの周囲に発生する磁束の打ち消し合い効果をさらに高めることができ、漏れ磁束をより低減できる。 According to invention of Claim 4 , the cancellation effect of the magnetic flux which generate | occur | produces around each coil can further be heightened, and a leakage magnetic flux can be reduced more.

請求項５の発明によれば、各コイルの周囲に発生する磁束の打ち消し合い効果をさらに高めることができ、漏れ磁束をより低減できる。 According to the invention of claim 5, the effect of canceling out magnetic flux generated around each coil can be further enhanced, and the leakage magnetic flux can be further reduced.

請求項６の発明によれば、各巻線中心軸が同一平面上に含まれるため、各コイルの各巻線部の巻き数や磁性コアの寸法等の設計を容易に行うことができる。 According to the invention of claim 6 , since the winding central axes are included on the same plane, the number of turns of each winding portion of each coil, the size of the magnetic core, and the like can be easily designed.

請求項７の発明によれば、各コア部に形成される磁束が等しいため、漏れ磁束を低減できる。 According to invention of Claim 7 , since the magnetic flux formed in each core part is equal, a leakage magnetic flux can be reduced.

請求項８の発明によれば、各コア部に形成される磁路の形状が共通であるため、各コイルの周囲に発生する磁束が互いに均衡し、漏れ磁束を効率的に低減できる。 According to invention of Claim 8 , since the shape of the magnetic path formed in each core part is common, the magnetic flux which generate | occur | produces around each coil balances each other, and it can reduce a leakage magnetic flux efficiently.

請求項９の発明によれば、一体化されていない各コア部にコイルの巻線を巻回した後にこれら２つのコア部を組み合わせることで、容易に本発明に係る複合型リアクトルを製造することができる。 According to the ninth aspect of the present invention, the composite reactor according to the present invention can be easily manufactured by combining the two core portions after winding the coil winding around the core portions which are not integrated. Can do.

［図１］本発明に係る複合型リアクトルを適用可能な２相インターリーブ型のＤＣ／ＤＣ
コンバータの一例を示す回路図である。
［図２］図１に示すＤＣ／ＤＣコンバータにおける各スイッチ部のスイッチング制御に応
じた電流変化の一例を示すグラフである。
［図３］第１実施形態の複合型リアクトルを模式的に示す図である。
［図４］第１実施形態の複合型リアクトルの各コイルの巻線部の分割巻き構成を説明する
分解斜視図である。
［図５］第１実施形態の複合型リアクトルにおいて、一方のコイルと第１コア部とから構
成されたリアクトルの周囲に発生する磁束の一部を示す図である。
［図６］第１実施形態の複合型リアクトルの周囲に発生する漏れ磁束の分布の一例を示す
図である。
［図７］従来の複合型リアクトルの一例を模式的に示す図である。
［図８］図７の複合型リアクトルの周囲に発生する漏れ磁束の分布を示す図である。
［図９］複合型リアクトルの参考例を模式的に示す図である。
［図１０］複合型リアクトルの他の参考例を模式的に示す図である。
［図１１］他の複合型リアクトルを模式的に示す図である。
［図１２］他の複合型リアクトルを模式的に示す斜視図である。
［図１３］他の複合型リアクトルを模式的に示す斜視図である。 [FIG. 1] Two-phase interleaved DC / DC to which a composite reactor according to the present invention can be applied.
It is a circuit diagram which shows an example of a converter.
2 is a graph showing an example of a current change according to switching control of each switch unit in the DC / DC converter shown in FIG.
FIG. 3 is a diagram schematically showing a composite reactor according to the first embodiment.
FIG. 4 is an exploded perspective view illustrating a split winding configuration of a winding portion of each coil of the composite reactor according to the first embodiment.
FIG. 5 is a diagram showing a part of magnetic flux generated around a reactor constituted by one coil and a first core portion in the composite reactor of the first embodiment.
FIG. 6 is a diagram showing an example of a distribution of leakage magnetic flux generated around the composite reactor of the first embodiment.
FIG. 7 is a diagram schematically showing an example of a conventional composite reactor.
8 is a diagram showing a distribution of leakage magnetic flux generated around the composite reactor of FIG.
FIG. 9 is a diagram schematically showing a reference example of a composite reactor .
FIG. 10 is a diagram schematically showing another reference example of a composite reactor .
FIG. 11 is a diagram schematically showing another composite reactor.
FIG. 12 is a perspective view schematically showing another composite reactor.
FIG. 13 is a perspective view schematically showing another composite reactor.

以下、本発明に係る複合型リアクトルの実施形態を説明する。 Hereinafter, embodiments of the composite reactor according to the present invention will be described.

図１は、本発明に係る複合型リアクトルを適用可能な２相インターリーブ型のＤＣ／ＤＣコンバータの一例を示す回路図である。図１に示す２相インターリーブ型のＤＣ／ＤＣコンバータは、平滑コンデンサＣ１と、２つのコイル２，３を有する複合型リアクトル１と、スイッチ部ＳＷ１，ＳＷ２，ＳＷ３，ＳＷ４と、平滑コンデンサＣ２とを備える。当該ＤＣ／ＤＣコンバータは、平滑コンデンサＣ１側の電圧Ｖ１を入力電圧とし、平滑コンデンサＣ２側の電圧Ｖ２を出力電圧として作動する場合、入力電圧Ｖ１を昇圧する。逆に、平滑コンデンサＣ２側の電圧Ｖ２を入力電圧とし、平滑コンデンサＣ１側の電圧Ｖ１を出力電圧として作動する場合、当該ＤＣ／ＤＣコンバータは、入力電圧Ｖ２を降圧する。 FIG. 1 is a circuit diagram showing an example of a two-phase interleaved DC / DC converter to which a composite reactor according to the present invention can be applied. The two-phase interleaved DC / DC converter shown in FIG. 1 includes a smoothing capacitor C1, a composite reactor 1 having two coils 2 and 3, a switch unit SW1, SW2, SW3 and SW4, and a smoothing capacitor C2. Prepare. When the DC / DC converter operates with the voltage V1 on the smoothing capacitor C1 side as an input voltage and the voltage V2 on the smoothing capacitor C2 side as an output voltage, the DC / DC converter boosts the input voltage V1. Conversely, when the voltage V2 on the smoothing capacitor C2 side is used as the input voltage and the voltage V1 on the smoothing capacitor C1 side is used as the output voltage, the DC / DC converter steps down the input voltage V2.

複合型リアクトル１のコイル２にはスイッチ部ＳＷ１，ＳＷ２が接続され、複合型リアクトル１のコイル３にはスイッチ部ＳＷ３，ＳＷ４が接続されている。スイッチ部ＳＷ１，ＳＷ２，ＳＷ３，ＳＷ４は、それぞれＩＧＢＴ（Insulated Gate Bipolar Transistor）等のスイッチング素子と、このスイッチング素子に並列接続された還流ダイオードとを有する。 Switch portions SW1 and SW2 are connected to the coil 2 of the composite reactor 1, and switch portions SW3 and SW4 are connected to the coil 3 of the composite reactor 1. Each of the switch units SW1, SW2, SW3, and SW4 includes a switching element such as an IGBT (Insulated Gate Bipolar Transistor) and a reflux diode connected in parallel to the switching element.

スイッチ部ＳＷ１〜ＳＷ４の各スイッチング素子は、図示しないスイッチング制御部からの信号によってオンオフ制御される。但し、スイッチング制御部は、スイッチ部ＳＷ１のスイッチング素子をオン制御する際には、スイッチ部ＳＷ２のスイッチング素子をオフ制御し、逆に、スイッチ部ＳＷ１のスイッチング素子をオフ制御する際には、スイッチ部ＳＷ２のスイッチング素子をオン制御する。同様に、スイッチング制御部は、スイッチ部ＳＷ３のスイッチング素子をオン制御する際には、スイッチ部ＳＷ４のスイッチング素子をオフ制御し、逆に、スイッチ部ＳＷ３のスイッチング素子をオフ制御する際には、スイッチ部ＳＷ４のスイッチング素子をオン制御する。 Each switching element of the switch units SW1 to SW4 is on / off controlled by a signal from a switching control unit (not shown). However, the switching control unit turns off the switching element of the switch unit SW2 when turning on the switching element of the switch unit SW1, and conversely, when switching off the switching element of the switch unit SW1, The switching element of the unit SW2 is turned on. Similarly, when the switching control unit switches on the switching element of the switch unit SW3, the switching control unit controls off of the switching unit of the switch unit SW4, and conversely, when switching off the switching element of the switch unit SW3, The switching element of the switch unit SW4 is turned on.

図２は、図１に示したＤＣ／ＤＣコンバータにおけるスイッチ部ＳＷ１〜ＳＷ４のスイッチング制御に応じた電流変化の一例を示すグラフである。図２には、スイッチ部ＳＷ１〜ＳＷ４のスイッチング制御に応じた、複合型リアクトル１のコイル２を流れる電流Ｉ１、複合型リアクトル１のコイル３を流れる電流Ｉ２、及び電流Ｉ１，Ｉ２の合成電流Ｉｃの各変化が示される。図２に示すように、スイッチ部ＳＷ２がオン制御、スイッチ部ＳＷ１がオフ制御されると、複合型リアクトル１のコイル２を流れる電流Ｉ１は増加し、スイッチ部ＳＷ２がオフ制御、スイッチ部ＳＷ１がオン制御されると電流Ｉ１は低下する。同様に、スイッチ部ＳＷ４がオン制御、スイッチ部ＳＷ３がオフ制御されると、複合型リアクトル１のコイル３を流れる電流Ｉ２は増加し、スイッチ部ＳＷ４がオフ制御、スイッチ部ＳＷ３がオン制御されると電流Ｉ２は低下する。なお、当該電流の増減は、図２に示したスイッチ部ＳＷ２，ＳＷ４の時比率（デューティ比）と、複合型リアクトル１のインダクタンス及び結合率とに応じて異なる。 FIG. 2 is a graph illustrating an example of a current change according to switching control of the switch units SW1 to SW4 in the DC / DC converter illustrated in FIG. FIG. 2 shows a current I1 flowing through the coil 2 of the composite reactor 1, a current I2 flowing through the coil 3 of the composite reactor 1, and a combined current Ic of the currents I1 and I2 according to the switching control of the switch units SW1 to SW4. Each change is shown. As shown in FIG. 2, when the switch unit SW2 is turned on and the switch unit SW1 is turned off, the current I1 flowing through the coil 2 of the composite reactor 1 increases, the switch unit SW2 is turned off, and the switch unit SW1 is turned on. When the ON control is performed, the current I1 decreases. Similarly, when the switch unit SW4 is turned on and the switch unit SW3 is turned off, the current I2 flowing through the coil 3 of the composite reactor 1 increases, the switch unit SW4 is turned off, and the switch unit SW3 is turned on. And current I2 falls. The increase / decrease in the current differs depending on the time ratio (duty ratio) of the switch units SW2 and SW4 shown in FIG. 2 and the inductance and coupling rate of the composite reactor 1.

図２に示すように、スイッチ部ＳＷ１，ＳＷ２のスイッチング制御の１周期（Ｔｓ）と、スイッチ部ＳＷ３，ＳＷ４のスイッチング制御の１周期（Ｔｓ）とは位相が半周期（Ｔｓ／２）ずれている。その結果、電流Ｉ１と電流Ｉ２の合成電流Ｉｃは半周期（Ｔｓ／２）毎に値が増加するため、２相インターリーブ型のＤＣ／ＤＣコンバータは、インダクタンス値が同様の単相の場合と比較して、リプルの小さい安定した電流を出力できる。 As shown in FIG. 2, one cycle (Ts) of switching control of the switch units SW1 and SW2 and one cycle (Ts) of switching control of the switch units SW3 and SW4 are shifted in phase by a half cycle (Ts / 2). Yes. As a result, since the combined current Ic of the currents I1 and I2 increases every half cycle (Ts / 2), the two-phase interleaved DC / DC converter is compared with the single-phase type having the same inductance value. Thus, a stable current with a small ripple can be output.

なお、図１に示したＤＣ／ＤＣコンバータでは、コイル２とコイル３は互いに磁気結合しており、巻数比が１：１であるので、コイル３にはコイル２と同じ電圧が誘起される。また、コイル２，３の巻線の巻回方向はドットによって示される。図１に示した構成では、コイル３の巻線の端子ｃは電源（Ｖｉｎ）の正極側であり、巻回方向が異なるコイル２の巻線の端子ａも電源（Ｖｉｎ）の正極側である。このため、スイッチ部ＳＷ２がオン制御されてコイル２に電流Ｉ１が流れる状態の時、コイル３には電流Ｉ２がコアの磁化を相殺する方向に発生する。同様に、スイッチ部ＳＷ４がオン制御されてコイル３に電流Ｉ２が流れる状態の時、コイル２には電流Ｉ１がコアの磁化を相殺する方向に発生する。 In the DC / DC converter shown in FIG. 1 , the coil 2 and the coil 3 are magnetically coupled to each other and the turns ratio is 1: 1, so that the same voltage as that of the coil 2 is induced in the coil 3. The winding direction of the coils 2 and 3 is indicated by dots. In the configuration shown in FIG. 1 , the terminal c of the winding of the coil 3 is on the positive side of the power source (Vin), and the terminal a of the winding of the coil 2 having a different winding direction is also on the positive side of the power source (Vin). is there. Therefore, a state where the switch unit SW2 is turned on control current I1 flows through the coil 2, the coil 3 generated in the direction current I2 to cancel the magnetization of the core. Similarly, when a state where the switch unit SW4 is turned on control current I2 flows through the coil 3, the coil 2 occurs in the direction of current I1 to cancel the magnetization of the core.

以下、上記説明した２相インターリーブ型のＤＣ／ＤＣコンバータに適用可能な複合型リアクトル１の複数の実施形態について説明する。 Hereinafter, a plurality of embodiments of the composite reactor 1 applicable to the above-described two-phase interleaved DC / DC converter will be described.

（第１実施形態）
第１実施形態の複合型リアクトル１０について、図３〜図６を参照して説明する。図３は、第１実施形態の複合型リアクトルを模式的に示す図である。図３に示すように、第１実施形態の複合型リアクトル１０は、磁性コア１１と、共通コアとしての磁性コア１１に巻回される２つのコイル１２，１３とを備える。 (First embodiment)
The composite reactor 10 of 1st Embodiment is demonstrated with reference to FIGS. FIG. 3 is a diagram schematically illustrating the composite reactor according to the first embodiment. As shown in FIG. 3, the composite reactor 10 of the first embodiment includes a magnetic core 11 and two coils 12 and 13 wound around the magnetic core 11 as a common core.

磁性コア１１は、平面視で略Ｕ字状に形成された、分割可能な同形状の第１コア部１１ａ及び第２コア部１１ｂを有する。なお、第１コア部１１ａ及び第２コア部１１ｂは、磁性材である珪素鋼板又はダストコア等を積層してそれぞれ構成される。第１コア部１１ａと第２コア部１１ｂとは、各コア部の凹部がそれぞれ対向し、一方のコア部の２つの端面に他方のコア部の対向する２つの端面を重ねた状態で結合される。第１コア部１１ａと第２コア部１１ｂとを結合した磁性コア１１の平面視形状は、四隅の角を落とした矩形ループ状である。第１コア部１１ａにはコイル１２の巻線が巻回され、第２コア部１１ｂにはコイル１３の巻線が巻回される。なお、磁性コア１１の平面視形状は、四隅の角部を有する完全な矩形ループ状であっても良い。 The magnetic core 11 has a first core portion 11 a and a second core portion 11 b that are substantially U-shaped in plan view and can be divided and have the same shape. In addition, the 1st core part 11a and the 2nd core part 11b are each comprised by laminating | stacking the silicon steel plate or dust core etc. which are magnetic materials. The first core portion 11a and the second core portion 11b are coupled in a state in which the concave portions of the respective core portions face each other, and two opposite end surfaces of the other core portion overlap each other on two end surfaces of the one core portion. The The planar view shape of the magnetic core 11 that combines the first core portion 11a and the second core portion 11b is a rectangular loop shape with four corners dropped. The winding of the coil 12 is wound around the first core portion 11a, and the winding of the coil 13 is wound around the second core portion 11b. The planar view shape of the magnetic core 11 may be a complete rectangular loop shape having four corners.

コイル１２は、第１巻線部１２ａと第２巻線部１２ｂとに分割巻きされる。第１巻線部１２ａ及び第２巻線部１２ｂは、第１コア部１１ａの対向する２辺を構成する巻回部に、各巻回部の巻線中心軸Ｚ１１，Ｚ１２を中心に巻回される。図３に示す例では、第１巻線部１２ａの巻線は、第１コア部１１ａの一方の巻回部に、巻線中心軸Ｚ１１を中心に巻回される。また、第２巻線部１２ｂの巻線は、第１コア部１１ａの他方の巻回部に、巻線中心軸Ｚ１２を中心に巻回される。なお、第１巻線部１２ａ及び第２巻線部１２ｂの各巻き数は同数である。 The coil 12 is divided and wound into a first winding portion 12a and a second winding portion 12b. The first winding portion 12a and the second winding portion 12b are wound around the winding center axes Z11 and Z12 of the winding portions around the winding portions constituting the two opposing sides of the first core portion 11a. The In the example shown in FIG. 3, the winding of the first winding portion 12a is wound around one winding portion of the first core portion 11a around the winding center axis Z11. The winding of the second winding portion 12b is wound around the winding center axis Z12 around the other winding portion of the first core portion 11a. The number of turns of the first winding part 12a and the second winding part 12b is the same.

同様に、コイル１３は、第３巻線部１３ａと第４巻線部１３ｂとに分割巻きされる。第３巻線部１３ａ及び第４巻線部１３ｂは、第２コア部１１ｂの対向する２辺を構成する巻回部に、各巻回部の巻線中心軸Ｚ１３，Ｚ１４を中心に巻回される。図３に示す例では、第３巻線部１３ａの巻線は、第２コア部１１ｂの一方の巻回部に、巻線中心軸Ｚ１３を中心に巻回される。また、第４巻線部１３ｂの巻線は、第２コア部１１ｂの他方の巻回部に、巻線中心軸Ｚ１４を中心に巻回される。なお、第３巻線部１３ａ及び第４巻線部１３ｂの各巻き数は同数である。 Similarly, the coil 13 is divided and wound into a third winding portion 13a and a fourth winding portion 13b. The third winding portion 13a and the fourth winding portion 13b are wound around the winding center axes Z13 and Z14 of the winding portions around the winding portions constituting the two opposing sides of the second core portion 11b. The In the example shown in FIG. 3, the winding of the third winding portion 13a is wound around one winding portion of the second core portion 11b around the winding center axis Z13. The winding of the fourth winding portion 13b is wound around the winding center axis Z14 around the other winding portion of the second core portion 11b. The number of turns of the third winding portion 13a and the fourth winding portion 13b is the same.

なお、本実施形態の磁性コア１１によれば、第１コア部１１ａの一方の巻回部の巻線中心軸Ｚ１１と、第２コア部１１ｂの一方の巻回部の巻線中心軸Ｚ１３は共通し、第１コア部１１ａの他方の巻回部の巻線中心軸Ｚ１２と、第２コア部１１ｂの他方の巻回部の巻線中心軸Ｚ１４は共通する。また、巻線中心軸Ｚ１１と巻線中心軸Ｚ１２は平行であり、巻線中心軸Ｚ１３と巻線中心軸Ｚ１４は平行である。また、巻線中心軸Ｚ１１〜Ｚ１４は全て同一平面上に含まれる。 According to the magnetic core 11 of the present embodiment, the winding center axis Z11 of one winding portion of the first core portion 11a and the winding center axis Z13 of one winding portion of the second core portion 11b are In common, the winding center axis Z12 of the other winding part of the first core part 11a and the winding center axis Z14 of the other winding part of the second core part 11b are common. The winding center axis Z11 and the winding center axis Z12 are parallel, and the winding center axis Z13 and the winding center axis Z14 are parallel. The winding center axes Z11 to Z14 are all included on the same plane.

図４は、第１実施形態の複合型リアクトル１０の各コイルの巻線部の分割巻き構成を説明する分解斜視図である。図４に示す端子ａはコイル１２の巻線の始点を示し、端子ｂはコイル１２の巻線の終点を示す。端子ａは、コイル１２の第１巻線部１２ａの始点でもあり、端子ｂは、コイル１２の第２巻線部１２ｂの終点でもある。なお、端子ａ，ｂは、図１に示した端子ａ，ｂの関係と同様である。また、図４に示す端子ｃはコイル１３の巻線の始点を示し、端子ｄはコイル１３の巻線の終点を示す。端子ｃは、コイル１３の第３巻線部１３ａの始点でもあり、端子ｄは、コイル１３の第４巻線部１３ｂの終点でもある。なお、端子ｃ，ｄは、図１に示した端子ｃ，ｄの関係と同様である。 FIG. 4 is an exploded perspective view illustrating a split winding configuration of the winding portion of each coil of the composite reactor 10 of the first embodiment. A terminal a shown in FIG. 4 indicates the starting point of the winding of the coil 12, and a terminal b indicates the end point of the winding of the coil 12. The terminal a is also the starting point of the first winding part 12a of the coil 12, and the terminal b is also the end point of the second winding part 12b of the coil 12. The terminal a, b is the same as that between the terminal a, b of FIG. 1. 4 indicates the starting point of the winding of the coil 13, and the terminal d indicates the end of the winding of the coil 13. The terminal c is also the starting point of the third winding part 13 a of the coil 13, and the terminal d is also the end point of the fourth winding part 13 b of the coil 13. The terminal c, d is the same as that between the terminal c, and d shown in FIG.

コイル１２の巻線は、第１コア部１１ａの一方の巻回部に、巻線中心軸Ｚ１１と平行な図４に示す矢印Ａ方向に見て反時計回りに巻回されて、第１巻線部１２ａを構成した後、第１コア部１１ａの他方の巻回部側に案内され、当該他方の巻回部に、巻線中心軸Ｚ１２とも平行な矢印Ａ方向に見て時計回りに巻回されて、第２巻線部１２ｂを構成する。また、コイル１３の巻線は、第２コア部１１ｂの一方の巻回部に、巻線中心軸Ｚ１３と平行な矢印Ａ方向に見て時計回りに巻回されて、第３巻線部１３ａを構成した後、第２コア部１１ｂの他方の巻回部側に案内され、当該他方の巻回部に、巻線中心軸Ｚ１４とも平行な矢印Ａ方向に見て反時計回りに巻回されて、第４巻線部１３ｂを構成する。したがって、第１巻線部１２ａによる第１コア部１１ａにおける磁束の向きは、第３巻線部１３ａによる第２コア部１１ｂにおける磁束の向きに相反する。同様に、第２巻線部１２ｂによる第１コア部１１ａにおける磁束の向きは、第４巻線部１３ｂによる第２コア部１１ｂにおける磁束の向きに相反する。 The winding of the coil 12 is wound around one winding portion of the first core portion 11a counterclockwise when viewed in the direction of arrow A shown in FIG. 4 parallel to the winding center axis Z11. After configuring the wire portion 12a, the wire portion 12a is guided to the other winding portion side of the first core portion 11a, and is wound around the other winding portion in a clockwise direction when viewed in the arrow A direction parallel to the winding center axis Z12. The second winding portion 12b is configured by being rotated. Further, the winding of the coil 13 is wound around one winding portion of the second core portion 11b in a clockwise direction when viewed in the direction of arrow A parallel to the winding center axis Z13, and the third winding portion 13a. After being configured, the second core portion 11b is guided to the other winding portion side, and is wound around the other winding portion counterclockwise when viewed in the direction of arrow A parallel to the winding center axis Z14. Thus, the fourth winding portion 13b is configured. Therefore, the direction of the magnetic flux in the first core portion 11a by the first winding portion 12a is opposite to the direction of the magnetic flux in the second core portion 11b by the third winding portion 13a. Similarly, the direction of the magnetic flux in the first core portion 11a by the second winding portion 12b is opposite to the direction of the magnetic flux in the second core portion 11b by the fourth winding portion 13b.

また、第１コア部１１ａの形状と第２コア部１１ｂの形状が等しく、各コア部には結合面を中心にコイル１２，１３が対称に配設されているため、コイル１２により生じる磁束の第１コア部１１ａでの磁路ＭＰ２と、コイル１３により生じる磁束の第２コア部１１ｂでの磁路ＭＰ３とは共通の矩形形状を有し、２つの磁路ＭＰ２，ＭＰ３の磁路長は等しい。 Moreover, since the shape of the 1st core part 11a and the shape of the 2nd core part 11b are equal, and the coils 12 and 13 are symmetrically arrange | positioned centering on the coupling surface in each core part, the magnetic flux produced by the coil 12 The magnetic path MP2 in the first core portion 11a and the magnetic path MP3 in the second core portion 11b of the magnetic flux generated by the coil 13 have a common rectangular shape, and the magnetic path lengths of the two magnetic paths MP2 and MP3 are equal.

図５は、第１実施形態の複合型リアクトル１０において、コイル１２と第１コア部１１ａとから構成されたリアクトルの周囲に発生する磁束の一部を示す図である。コイル１２の第１巻線部１２ａ及び第２巻線部１２ｂは、第１コア部１１ａの巻線中心軸Ｚ１１，Ｚ１２に沿った各巻回部に、巻線中心軸Ｚ１１，Ｚ１２を中心に同巻き数で巻回されている。また、図４に示したように、第１巻線部１２ａの巻線中心軸Ｚ１１を中心とした巻き方向は、第２巻線部１２ｂの巻線中心軸Ｚ１２を中心とした巻き方向と逆向きである。したがって、図５に示すように、第１巻線部１２ａの周囲に発生する磁束Φ１と、第２巻線部１２ｂの周囲に発生する磁束Φ２とは、コイル１２の周囲で互いに打ち消し合うよう作用する。 FIG. 5 is a diagram illustrating a part of the magnetic flux generated around the reactor configured by the coil 12 and the first core portion 11a in the composite reactor 10 of the first embodiment. The first winding portion 12a and the second winding portion 12b of the coil 12 are the same around the winding center axes Z11 and Z12 as the winding portions along the winding center axes Z11 and Z12 of the first core portion 11a. It is wound with the number of turns. Further, as shown in FIG. 4, the winding direction around the winding center axis Z11 of the first winding portion 12a is opposite to the winding direction around the winding center axis Z12 of the second winding portion 12b. The direction. Therefore, as shown in FIG. 5, the magnetic flux Φ1 generated around the first winding portion 12a and the magnetic flux Φ2 generated around the second winding portion 12b act so as to cancel each other around the coil 12. To do.

同様に、コイル１３の第３巻線部１３ａ及び第４巻線部１３ｂは、第２コア部１１ｂの巻線中心軸Ｚ１３，Ｚ１４に沿った各巻回部に、巻線中心軸Ｚ１３，Ｚ１４を中心に同巻き数で巻回されている。また、図４に示したように、第３巻線部１３ａの巻線中心軸Ｚ１３を中心とした巻き方向は、第４巻線部１３ｂの巻線中心軸Ｚ１４を中心とした巻き方向と逆向きである。したがって、第３巻線部１３ａの周囲に発生する磁束と、第４巻線部１３ｂの周囲に発生する磁束とは、コイル１３の周囲で互いに打ち消し合うよう作用する。 Similarly, the third winding portion 13a and the fourth winding portion 13b of the coil 13 are respectively provided with the winding center axes Z13 and Z14 at the winding portions along the winding center axes Z13 and Z14 of the second core portion 11b. It is wound in the center with the same number of turns. As shown in FIG. 4, the winding direction around the winding center axis Z13 of the third winding portion 13a is opposite to the winding direction around the winding center axis Z14 of the fourth winding portion 13b. The direction. Therefore, the magnetic flux generated around the third winding portion 13 a and the magnetic flux generated around the fourth winding portion 13 b act so as to cancel each other around the coil 13.

図６は、第１実施形態の複合型リアクトル１０の周囲に発生する漏れ磁束の分布の一例を示す図である。上記説明したように、コイル１２側では第１巻線部１２ａの周囲に発生する磁束と第２巻線部１２ｂの周囲に発生する磁束とが互いに打ち消し合い、コイル１３側では第３巻線部１３ａの周囲に発生する磁束と第４巻線部１３ｂの周囲に発生する磁束とが互いに打ち消し合う。一方、本実施形態の複合型リアクトル１０の周囲に発生する漏れ磁束の比較として、従来の複合型リアクトルの構成を図７に示し、当該複合型リアクトルの周囲に発生する漏れ磁束の分布の一例を図８に示す。図８に示すように、図７に示した複合型リアクトルの周囲の磁界には、一方のコイルからの漏れ磁束と、他方のコイルからの漏れ磁束とが含まれ、漏れ磁束は互いに打ち消し合っていない。このように、本実施形態では、本実施形態の複合型リアクトル１０の周囲に発生する漏れ磁束は、各コイルの一方の巻線部による磁束が他方の巻線部による磁束を打ち消すことにより低減されている。なお、本実施形態で用いられる磁性コア１１が従来のものと同様であっても、上記説明したように、各コイルの分割巻きされた各巻線部の巻き方向を上記構成とすることで、漏れ磁束の低減を実現できる。 FIG. 6 is a diagram illustrating an example of a distribution of leakage magnetic flux generated around the composite reactor 10 of the first embodiment. As described above, the magnetic flux generated around the first winding portion 12a and the magnetic flux generated around the second winding portion 12b cancel each other on the coil 12 side, and the third winding portion on the coil 13 side. The magnetic flux generated around 13a and the magnetic flux generated around the fourth winding portion 13b cancel each other. On the other hand, as a comparison of leakage flux generated around the composite reactor 10 of the present embodiment, the configuration of a conventional composite reactor is shown in FIG. As shown in FIG. As shown in FIG. 8, the magnetic field around the composite reactor shown in FIG. 7 includes leakage magnetic flux from one coil and leakage magnetic flux from the other coil, and the leakage magnetic fluxes cancel each other. Absent. As described above, in the present embodiment, the leakage magnetic flux generated around the composite reactor 10 of the present embodiment is reduced by the magnetic flux generated by one winding portion of each coil canceling the magnetic flux generated by the other winding portion. ing. Even if the magnetic core 11 used in the present embodiment is the same as that of the conventional one, as described above, the winding direction of each winding part of each coil is configured as described above, so that leakage occurs. Reduction of magnetic flux can be realized.

また、本実施形態では、図３に示したように、第１巻線部１２ａによる第１コア部１１ａにおける磁束の向きは、第３巻線部１３ａによる第２コア部１１ｂにおける磁束の向きに相反し、第２巻線部１２ｂによる第１コア部１１ａにおける磁束の向きは、第４巻線部１３ｂによる第２コア部１１ｂにおける磁束の向きに相反している。このため、磁性コア１１の磁気飽和が起こりにくくなり、本実施形態の複合型リアクトル１０は、磁気結合型リアクトルとして十分に機能する。 In the present embodiment, as shown in FIG. 3, the direction of the magnetic flux in the first core portion 11a by the first winding portion 12a is the same as the direction of the magnetic flux in the second core portion 11b by the third winding portion 13a. In contrast, the direction of the magnetic flux in the first core portion 11a by the second winding portion 12b is opposite to the direction of the magnetic flux in the second core portion 11b by the fourth winding portion 13b. For this reason, the magnetic saturation of the magnetic core 11 is less likely to occur, and the composite reactor 10 of this embodiment functions sufficiently as a magnetically coupled reactor.

また、本実施形態では、磁性コア１１を構成する第１コア部１１ａ及び第２コア部１１ｂは同形状であり、コイル１２の第１巻線部１２ａ及び第２巻線部１２ｂの各中心軸である巻線中心軸Ｚ１１，Ｚ１２、及びコイル１３の第３巻線部１３ａ及び第４巻線部１３ｂの各中心軸である巻線中心軸Ｚ１３，Ｚ１４は同一平面上に含まれる。また、巻線中心軸Ｚ１１と巻線中心軸Ｚ１３は共通し、巻線中心軸Ｚ１２と巻線中心軸Ｚ１４は共通する。また、巻線中心軸Ｚ１１と巻線中心軸Ｚ１２は平行であり、巻線中心軸Ｚ１３と巻線中心軸Ｚ１４は平行である。さらに、コイル１２により生じる磁束の第１コア部１１ａでの磁路と、コイル１３により生じる磁束の第２コア部１１ｂでの磁路とは共通の形状を有し、これら２つの磁路の磁路長は等しい。したがって、各コイルの周囲に発生する磁束が互いに均衡し、本実施形態の複合型リアクトル１０の周囲の漏れ磁束を効率的に低減できる。 Moreover, in this embodiment, the 1st core part 11a and the 2nd core part 11b which comprise the magnetic core 11 are the same shapes, and each center axis | shaft of the 1st winding part 12a of the coil 12, and the 2nd winding part 12b The winding center axes Z11, Z12 and the winding center axes Z13, Z14, which are the center axes of the third winding portion 13a and the fourth winding portion 13b of the coil 13, are included in the same plane. The winding center axis Z11 and the winding center axis Z13 are common, and the winding center axis Z12 and the winding center axis Z14 are common. The winding center axis Z11 and the winding center axis Z12 are parallel, and the winding center axis Z13 and the winding center axis Z14 are parallel. Further, the magnetic path of the magnetic flux generated by the coil 12 in the first core portion 11a and the magnetic path of the magnetic flux generated by the coil 13 in the second core portion 11b have a common shape, and the magnetic paths of these two magnetic paths are the same. The road length is equal. Therefore, the magnetic flux generated around each coil is balanced, and the leakage magnetic flux around the composite reactor 10 of the present embodiment can be efficiently reduced.

さらに、磁性コア１１は、同形状の第１コア部１１ａ及び第２コア部１１ｂから構成されるため、一体化されていない各コア部にコイルの巻線を巻回した後にこれら２つのコア部を結合することで、容易に本実施形態の複合型リアクトル１０を製造することができる。 Furthermore, since the magnetic core 11 is composed of the first core portion 11a and the second core portion 11b having the same shape, the two core portions are wound after winding the coil winding around each non-integrated core portion. By combining these, the composite reactor 10 of this embodiment can be easily manufactured.

（複合型リアクトルの参考例）
図９は、複合型リアクトルの参考例を模式的に示す図である。参考例の複合型リアクトル２０が複合型リアクトル１０と異なる点は、コアの形状である。このため、複合型リアクトル１０と同一又は同等の構成要素には同一符号又は相当符号を付して説明を簡略化又は省略する。 ( Reference example of composite reactor )
FIG. 9 is a diagram schematically illustrating a reference example of the composite reactor. The difference between the composite reactor 20 of the reference example and the composite reactor 10 is the shape of the core. For this reason, the same or equivalent components as those of the composite reactor 10 are denoted by the same or corresponding symbols, and description thereof is simplified or omitted.

参考例の複合型リアクトル２０が備える磁性コア２１は、平面視で略Ｃ字状に形成された、分割可能な同形状の第１コア部２１ａ及び第２コア部２１ｂを有する。なお、第１コア部２１ａ及び第２コア部２１ｂは、磁性材である珪素鋼板又はダストコア等を積層してそれぞれ構成される。第１コア部２１ａと第２コア部２１ｂとは、各コア部の凹部がそれぞれ対向し、一方のコア部の２つの端面に他方のコア部の対向する２つの端面を重ねた状態で結合される。第１コア部２１ａと第２コア部２１ｂとを結合した磁性コア２１の平面視形状は円環状である。なお、図１０に示すように、第１コア部２１ａと第２コア部２１ｂとを結合した平面視形状が楕円に近い環状の磁性コアであっても良い。 The magnetic core 21 included in the composite reactor 20 of the reference example includes a first core portion 21a and a second core portion 21b that are substantially C-shaped in plan view and can be divided and have the same shape. In addition, the 1st core part 21a and the 2nd core part 21b are each comprised by laminating | stacking the silicon steel plate or dust core etc. which are magnetic materials. The first core portion 21a and the second core portion 21b are coupled in a state in which the concave portions of the respective core portions face each other, and the two opposite end surfaces of the other core portion overlap the two end surfaces of the one core portion. The The planar view shape of the magnetic core 21 which couple | bonds the 1st core part 21a and the 2nd core part 21b is an annular | circular shape. In addition, as shown in FIG. 10, the cyclic | annular magnetic core in which the planar view shape which couple | bonded the 1st core part 21a and the 2nd core part 21b may be an ellipse may be sufficient.

また、第１コア部２１ａの形状と第２コア部２１ｂの形状が等しく、各コア部には結合面を中心にコイル１２，１３が対称に配設されているため、コイル１２により生じる磁束の第１コア部２１ａでの磁路と、コイル１３により生じる磁束の第２コア部２１ｂでの磁路とは共通の環状形状を有し、２つの磁路の磁路長は等しい。 Moreover, since the shape of the 1st core part 21a and the shape of the 2nd core part 21b are equal, and the coils 12 and 13 are symmetrically arrange | positioned centering | focusing on the coupling surface in each core part, the magnetic flux produced by the coil 12 is the same. The magnetic path in the first core portion 21a and the magnetic path in the second core portion 21b of the magnetic flux generated by the coil 13 have a common annular shape, and the magnetic path lengths of the two magnetic paths are equal.

本参考例の複合リアクトル２０でも、複合リアクトル１０と同様に、第１コア部２１ａにはコイル１２の巻線が分割巻きで巻回され、第２コア部２１ｂにはコイル１３の巻線が分割巻きで巻回される。コイル１２の第１巻線部１２ａ及び第２巻線部１２ｂは、図９に示す第１コア部２１ａの巻線中心軸Ｚ２１，Ｚ２２に沿った各巻回部に、巻線中心軸Ｚ２１，Ｚ２２を中心に同巻き数で巻回されている。第１巻線部１２ａの巻線中心軸Ｚ２１を中心とした巻き方向は、第２巻線部１２ｂの巻線中心軸Ｚ２２を中心とした巻き方向と逆向きである。したがって、第１巻線部１２ａの周囲に発生する磁束と、第２巻線部１２ｂの周囲に発生する磁束とは、コイル１２の周囲で互いに打ち消し合うよう作用する。 In the composite reactor 20 of the present reference example, similarly to the composite reactor 10 , the winding of the coil 12 is wound on the first core portion 21a by split winding, and the winding of the coil 13 is split on the second core portion 21b. It is wound with a roll. The first winding portion 12a and the second winding portion 12b of the coil 12 are wound around the winding center axes Z21, Z22 along the winding center axes Z21, Z22 of the first core portion 21a shown in FIG. Is wound at the same number of turns. The winding direction around the winding center axis Z21 of the first winding portion 12a is opposite to the winding direction around the winding center axis Z22 of the second winding portion 12b. Therefore, the magnetic flux generated around the first winding portion 12 a and the magnetic flux generated around the second winding portion 12 b act so as to cancel each other around the coil 12.

同様に、コイル１３の第３巻線部１３ａ及び第４巻線部１３ｂは、図９に示す第２コア部２１ｂの巻線中心軸Ｚ２３，Ｚ２４に沿った各巻回部に、巻線中心軸Ｚ２３，Ｚ２４を中心に同巻き数で巻回されている。また、第３巻線部１３ａの巻線中心軸Ｚ２３を中心とした巻き方向は、第４巻線部１３ｂの巻線中心軸Ｚ２４を中心とした巻き方向と逆向きである。したがって、第３巻線部１３ａの周囲に発生する磁束と、第４巻線部１３ｂの周囲に発生する磁束とは、コイル１３の周囲で互いに打ち消し合うよう作用する。 Similarly, the third winding portion 13a and the fourth winding portion 13b of the coil 13 are wound around the winding center axis along the winding center axes Z23 and Z24 of the second core portion 21b shown in FIG. It is wound with the same number of turns around Z23 and Z24. The winding direction around the winding center axis Z23 of the third winding portion 13a is opposite to the winding direction around the winding center axis Z24 of the fourth winding portion 13b. Therefore, the magnetic flux generated around the third winding portion 13 a and the magnetic flux generated around the fourth winding portion 13 b act so as to cancel each other around the coil 13.

したがって、コイル１２側では第１巻線部１２ａの周囲に発生する磁束と第２巻線部１２ｂの周囲に発生する磁束とが互いに打ち消し合い、コイル１３側では第３巻線部１３ａの周囲に発生する磁束と第４巻線部１３ｂの周囲に発生する磁束とが互いに打ち消し合うため、本参考例の複合型リアクトル２０の周囲に発生する漏れ磁束は小さい。 Therefore, the magnetic flux generated around the first winding portion 12a and the magnetic flux generated around the second winding portion 12b cancel each other on the coil 12 side, and around the third winding portion 13a on the coil 13 side. Since the generated magnetic flux and the magnetic flux generated around the fourth winding portion 13b cancel each other, the leakage magnetic flux generated around the composite reactor 20 of this reference example is small.

また、本参考例の複合型リアクトル２０では、図９に示したように、コイル１２の第１巻線部１２ａによる第１コア部２１ａにおける磁束の向きは、コイル１３の第３巻線部１３ａによる第２コア部２１ｂにおける磁束の向きに略相反する。同様に、コイル１２の第２巻線部１２ｂによる第１コア部２１ａにおける磁束の向きは、コイル１３の第４巻線部１３ｂによる第２コア部２１ｂにおける磁束の向きに略相反する。このため、磁性コア２１の磁気飽和が起こりにくくなり、本参考例の複合型リアクトル２０は、磁気結合型リアクトルとして十分に機能することができる。 Further, in the composite reactor 20 of this reference example , as shown in FIG. 9, the direction of the magnetic flux in the first core portion 21 a by the first winding portion 12 a of the coil 12 is the third winding portion 13 a of the coil 13. Is substantially opposite to the direction of magnetic flux in the second core portion 21b. Similarly, the direction of the magnetic flux in the first core portion 21a by the second winding portion 12b of the coil 12 is substantially opposite to the direction of the magnetic flux in the second core portion 21b by the fourth winding portion 13b of the coil 13. For this reason, magnetic saturation of the magnetic core 21 is less likely to occur, and the composite reactor 20 of the present reference example can sufficiently function as a magnetically coupled reactor.

また、本参考例の複合型リアクトル２０では、図９に示すように、磁性コア２１を構成する第１コア部２１ａ及び第２コア部２１ｂは同形状であり、第１コア部２１ａの各巻回部の巻線中心軸Ｚ２１，Ｚ２２及び第２コア部２１ｂの各巻回部の巻線中心軸Ｚ２３，Ｚ２４は全て同一平面上に含まれる。さらに、コイル１２により生じる磁束の第１コア部２１ａでの磁路と、コイル１３により生じる磁束の第２コア部２１ｂでの磁路とは共通の形状を有し、これら２つの磁路の磁路長は等しい。したがって、各コイルの周囲に発生する磁束が互いに均衡し、本参考例の複合型リアクトル２０の周囲の漏れ磁束を効率的に低減できる。 Moreover, in the composite reactor 20 of this reference example , as shown in FIG. 9, the 1st core part 21a and the 2nd core part 21b which comprise the magnetic core 21 are the same shapes, and each winding of the 1st core part 21a is carried out. The winding center axes Z21, Z22 of the part and the winding center axes Z23, Z24 of each winding part of the second core part 21b are all included in the same plane. Furthermore, the magnetic path of the magnetic flux generated by the coil 12 in the first core portion 21a and the magnetic path of the magnetic flux generated by the coil 13 in the second core portion 21b have a common shape, and the magnetic paths of these two magnetic paths are the same. The road length is equal. Therefore, the magnetic flux generated around each coil is balanced, and the leakage magnetic flux around the composite reactor 20 of the present reference example can be efficiently reduced.

さらに、磁性コア２１は、同形状の第１コア部２１ａ及び第２コア部２１ｂから構成されるため、一体化されていない各コア部にコイルの巻線を巻回した後にこれら２つのコア部を結合することで、容易に本参考例の複合型リアクトル２０を製造することができる。 Further, since the magnetic core 21 is composed of the first core portion 21a and the second core portion 21b having the same shape, the two core portions are wound after winding the coil winding around each unintegrated core portion. By combining these, the composite reactor 20 of the present reference example can be easily manufactured.

上記説明した複合型リアクトル１０、２０では、磁性コア１１，２１を構成する２つのコア部がそれぞれ同じ形状であるが、図１１に示すように、端面の面積及び形状が異なる２つのコア部３１ａ，３１ｂを結合して矩形ループ状又は環状の磁性コア３１を構成しても良い。この場合、一方のコア部の２つの端面に他方のコア部の対向する２つの端面を重ねた状態で、各端面が完全には重ならず、端面の一部が重なっていれば良い。当該構成であっても、各コイル１２，１３において、一方の巻線部の周囲に発生する磁束と、他方の巻線部の周囲に発生する磁束とが互いに打ち消し合うよう作用し、磁気結合型リアクトルとして十分に機能する。 In the composite reactors 10 and 20 described above, the two core parts constituting the magnetic cores 11 and 21 have the same shape, but as shown in FIG. 11, two core parts 31a having different end face areas and shapes. , 31b may be combined to form a rectangular loop-shaped or annular magnetic core 31. In this case, it is only necessary that the two end surfaces of the one core portion overlap the two opposite end surfaces of the other core portion so that the respective end surfaces do not completely overlap and a part of the end surface overlaps. Even in this configuration, in each of the coils 12 and 13, the magnetic flux generated around one winding portion and the magnetic flux generated around the other winding portion act so as to cancel each other, and the magnetic coupling type Works well as a reactor.

また、図１２に示すように、各コア部４１ａ，４１ｂの一方の巻回部と他方の巻回部との間に段差が設けられた構成であっても良い。この場合、第１コア部４１ａの一方の巻線部の巻線中心軸Ｚ４１及び第２コア部４１ｂの一方の巻線部の巻線中心軸Ｚ４３を含む平面と、第１コア部４１ａの他方の巻線部の巻線中心軸Ｚ４２及び第２コア部４１ｂの他方の巻線部の巻線中心軸Ｚ４４を含む平面とは異なる平面である。当該構成であっても、各コイル１２，１３において、一方の巻線部の周囲に発生する磁束と、他方の巻線部の周囲に発生する磁束とが互いに打ち消し合うよう作用、磁気結合型リアクトルとして十分に機能する。 Moreover, as shown in FIG. 12, the structure by which the level | step difference was provided between one winding part of each core part 41a, 41b and the other winding part may be sufficient. In this case, the plane including the winding center axis Z41 of one winding portion of the first core portion 41a and the winding center axis Z43 of one winding portion of the second core portion 41b, and the other of the first core portion 41a This is a plane different from the plane including the winding center axis Z42 of the winding portion and the winding center axis Z44 of the other winding portion of the second core portion 41b. Even in this configuration, in each of the coils 12 and 13, the magnetic flux generated around one winding portion and the magnetic flux generated around the other winding portion cancel each other, and the magnetically coupled reactor As well as it works.

また、図１３に示すように、磁性コア５１を構成する第１コア部５１ａ及び第２コア部５１ｂは同じ形状であるが、第１コア部５１ａに対して第２コア部５１ｂをずらして、第１コア部５１ａの巻線中心軸Ｚ５１，Ｚ５２と第２コア部５１ｂの巻線中心軸Ｚ５３，Ｚ５４とが互いにずれた状態で第１コア部５１ａと第２コア部５１ｂとを結合しても良い。この場合、第１コア部５１ａの一方の巻線部の巻線中心軸Ｚ５１及び他方の巻線部の巻線中心軸Ｚ５２を含む平面と、第２コア部５１ｂの一方の巻線部の巻線中心軸Ｚ５３及び他方の巻線部の巻線中心軸Ｚ５４を含む平面とは異なる平面である。当該構成であっても、各コイル１２，１３において、一方の巻線部の周囲に発生する磁束と、他方の巻線部の周囲に発生する磁束とが互いに打ち消し合うよう作用、磁気結合型リアクトルとして十分に機能する。 Further, as shown in FIG. 13, the first core part 51a and the second core part 51b constituting the magnetic core 51 have the same shape, but the second core part 51b is shifted with respect to the first core part 51a, The first core portion 51a and the second core portion 51b are coupled with the winding center axes Z51 and Z52 of the first core portion 51a and the winding center axes Z53 and Z54 of the second core portion 51b being shifted from each other. Also good. In this case, the plane including the winding center axis Z51 of one winding portion of the first core portion 51a and the winding center axis Z52 of the other winding portion, and the winding of one winding portion of the second core portion 51b. The plane is different from the plane including the line center axis Z53 and the winding center axis Z54 of the other winding portion. Even in this configuration, in each of the coils 12 and 13, the magnetic flux generated around one winding portion and the magnetic flux generated around the other winding portion cancel each other, and the magnetically coupled reactor As well as it works.

さらに、上記説明した磁性コアを構成する一方のコア部と他方のコア部との間にはエアギャップが設けられても良い。エアギャップを設けた構成であれば、エアギャップがない構成と比較して、コイル１２の第１巻線部１２ａとコイル１３の第３巻線部１３ａの間隔及びコイル１２の第２巻線部１２ｂとコイル１３の第４巻線部１３ｂの間隔を狭くできる。また、磁性コアの各コア部の巻線中心軸に垂直な断面形状は矩形であっても円形であっても良い。 Furthermore, an air gap may be provided between one core part and the other core part constituting the magnetic core described above. If it is the structure which provided the air gap, compared with the structure without an air gap, the space | interval of the 1st winding part 12a of the coil 12, and the 3rd winding part 13a of the coil 13, and the 2nd winding part of the coil 12 The distance between 12b and the fourth winding portion 13b of the coil 13 can be narrowed. The cross-sectional shape perpendicular to the winding central axis of each core portion of the magnetic core may be rectangular or circular.

なお、本発明は、前述した実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。例えば、本発明に係る複合型リアクトルは、図１に示した昇降圧を行うＤＣ／ＤＣコンバータ以外に、昇圧のみを行うＤＣ／ＤＣコンバータ又は降圧のみを行うＤＣ／ＤＣコンバータにも適用可能である。 In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. For example, the composite reactor according to the present invention is applicable to a DC / DC converter that performs only step-up or a DC / DC converter that performs only step-down, in addition to the DC / DC converter that performs step-up / step-down shown in FIG. .

１０，２０複合型リアクトル
１１，２１，３１，４１，５１磁性コア
１１ａ，２１ａ，３１ａ，４１ａ，５１ａ第１コア部
１１ｂ，２１ｂ，３１ｂ，４１ｂ，５１ｂ第２コア部
１２コイル
１２ａ第１巻線部
１２ｂ第２巻線部
１３コイル
１３ａ第３巻線部
１３ｂ第４巻線部
ＭＰ２，ＭＰ３磁路
Ｚ１１〜Ｚ１４，Ｚ２１〜Ｚ２４，Ｚ４１〜Ｚ４４，Ｚ５１〜Ｚ５４巻線中心軸 10, 20 Composite reactor 11, 21, 31, 41, 51 Magnetic cores 11a, 21a, 31a, 41a, 51a First core part 11b, 21b, 31b, 41b, 51b Second core part 12 Coil 12a First winding Part 12b Second winding part 13 Coil 13a Third winding part 13b Fourth winding part MP2, MP3 Magnetic paths Z11-Z14, Z21-Z24, Z41-Z44, Z51-Z54 Winding central axis

Claims

一端が共通の電源に接続される第１コイル及び第２コイルと、
前記第１コイル及び前記第２コイルが巻回された矩形ループ状の磁性コアと、を備えた、インターリーブ型のＤＣ／ＤＣコンバータに用いられる複合型リアクトルであって、
前記磁性コアは、前記第１コイルの巻線が巻回される略Ｕ字状の第１コア部と、前記第２コイルの巻線が巻回される略Ｕ字状の第２コア部とが、巻線中心軸方向から見て対向する端面が重なる位置に配置されており、
前記第１コイルは、前記第１コア部の対向する２辺を構成する巻回部に分割巻きされた第１巻線部及び第２巻線部を有し、
前記第２コイルは、前記第２コア部の対向する２辺を構成する巻回部に分割巻きされた第３巻線部及び第４巻線部を有し、
前記第１コア部の前記第１巻線部が巻回された巻回部側の端面と、前記第２コア部の前記第３巻線部が巻回された巻回部側の端面とが重なる位置に配置され、
前記第１コア部の前記第２巻線部が巻回された巻回部側の端面と、前記第２コア部の前記第４巻線部が巻回された巻回部側の端面とが重なる位置に配置され、
前記第１巻線部の一端及び前記第３巻線部の一端は、前記電源に接続され、
前記第１巻線部の他端及び前記第３巻線部の他端は、それぞれ前記第２巻線部の一端及び第４巻線部の一端に接続され、
前記第１コア部は、前記第１巻線部から突出する第１コア端部と、前記第２巻線部から突出する第２コア端部と、を有し、
前記第２コア部は、前記第３巻線部から突出する第３コア端部と、前記第４巻線部から突出する第４コア端部と、を有し、
前記第１巻線部は、巻線中心軸方向の一方向を見て時計回りと反時計回りの内の一方の巻回方向で巻回され、
前記第２巻線部は、巻線中心軸方向の前記一方向を見て時計回りと反時計回りの内の他方の巻回方向で巻回され、
前記第３巻線部は、巻線中心軸方向の前記一方向を見て時計回りと反時計回りの内の前記他方の巻回方向で巻回され、
前記第４巻線部は、巻線中心軸方向の前記一方向を見て時計回りと反時計回りの内の前記一方の巻回方向で巻回された、インターリーブ型のＤＣ／ＤＣコンバータに用いられる複合型リアクトル。 A first coil and a second coil, one end of which is connected to a common power source ;
A composite reactor used in an interleaved DC / DC converter , comprising a rectangular loop-shaped magnetic core around which the first coil and the second coil are wound ,
The magnetic core includes a substantially U-shaped first core portion around which the winding of the first coil is wound, and a substantially U-shaped second core portion around which the winding of the second coil is wound. However, it is arranged at the position where the opposite end faces when viewed from the winding central axis direction overlap,
The first coil has a first winding portion and a second winding portion that are separately wound around winding portions that constitute two opposing sides of the first core portion ,
The second coil has a third winding portion and a fourth winding portion that are separately wound around winding portions that constitute two opposing sides of the second core portion ,
An end surface on the winding portion side where the first winding portion of the first core portion is wound and an end surface on the winding portion side where the third winding portion of the second core portion is wound. Placed in overlapping positions,
An end surface on the winding portion side where the second winding portion of the first core portion is wound, and an end surface on the winding portion side where the fourth winding portion of the second core portion is wound. Placed in overlapping positions,
One end of the first winding part and one end of the third winding part are connected to the power source,
The other end of the first winding part and the other end of the third winding part are connected to one end of the second winding part and one end of the fourth winding part, respectively.
The first core portion has a first core end portion protruding from the first winding portion, and a second core end portion protruding from the second winding portion,
The second core portion has a third core end portion protruding from the third winding portion, and a fourth core end portion protruding from the fourth winding portion,
The first winding portion is wound in one winding direction of clockwise and counterclockwise when viewed in one direction of the winding central axis direction,
The second winding portion is wound in the other winding direction of clockwise and counterclockwise when viewed in the one direction of the winding central axis direction,
The third winding portion is wound in the other winding direction of clockwise and counterclockwise when viewed in the one direction of the winding central axis direction,
The fourth winding portion is used for an interleaved DC / DC converter wound in the one winding direction of clockwise and counterclockwise when viewed in the one direction of the winding central axis. Combined type reactor.

一端が共通の電源に接続される第１コイル及び第２コイルと、
前記第１コイル及び前記第２コイルが巻回された矩形ループ状の磁性コアと、を備えた、インターリーブ型のＤＣ／ＤＣコンバータに用いられる複合型リアクトルであって、
前記磁性コアは、前記第１コイルの巻線が巻回される略Ｕ字状の第１コア部と、前記第２コイルの巻線が巻回される略Ｕ字状の第２コア部とが、巻線中心軸方向から見て対向する端面が重なる位置に配置されており、
前記第１コイルは、前記第１コア部の対向する２辺を構成する巻回部に分割巻きされた第１巻線部及び第２巻線部を有し、
前記第１巻線部及び前記第２巻線部は、前記第１コイルの周囲に発生する磁束が互いに打ち消し合う向きにそれぞれ配設され、
前記第２コイルは、前記第２コア部の対向する２辺を構成する巻回部に分割巻きされた第３巻線部及び第４巻線部を有し、
前記第３巻線部及び前記第４巻線部は、前記第２コイルの周囲に発生する磁束が互いに打ち消し合う向きにそれぞれ配設され、
前記第１コア部の前記第１巻線部が巻回された巻回部側の端面と、前記第２コア部の前記第３巻線部が巻回された巻回部側の端面とが重なる位置に配置され、
前記第１コア部の前記第２巻線部が巻回された巻回部側の端面と、前記第２コア部の前記第４巻線部が巻回された巻回部側の端面とが重なる位置に配置され、
前記第１巻線部の一端及び前記第３巻線部の一端は、前記電源に接続され、
前記第１巻線部の他端及び前記第３巻線部の他端は、それぞれ前記第２巻線部の一端及び第４巻線部の一端に接続され、
前記第１コア部は、前記第１巻線部から突出する第１コア端部と、前記第２巻線部から突出する第２コア端部と、を有し、
前記第２コア部は、前記第３巻線部から突出する第３コア端部と、前記第４巻線部から突出する第４コア端部と、を有し、
前記第１巻線部及び前記第３巻線部は、
前記第１巻線部の前記一端から前記他端へ電流が流れた際に、前記第１コア部に発生する磁束の向きと、
前記第３巻線部の前記一端から前記他端へ電流が流れた際に、前記第２コア部に発生する磁束の向きと、が相反するように巻回され、
前記第２巻線部及び前記第４巻線部は、
前記第２巻線部の前記一端から前記他端へ電流が流れた際に、前記第１コア部に発生する磁束の向きと、
前記第４巻線部の前記一端から前記他端へ電流が流れた際に、前記第２コア部に発生する磁束の向きと、が相反するように巻回された、インターリーブ型のＤＣ／ＤＣコンバータに用いられる複合型リアクトル。 A first coil and a second coil, one end of which is connected to a common power source ;
A composite reactor used in an interleaved DC / DC converter , comprising a rectangular loop-shaped magnetic core around which the first coil and the second coil are wound ,
The magnetic core includes a substantially U-shaped first core portion around which the winding of the first coil is wound, and a substantially U-shaped second core portion around which the winding of the second coil is wound. However, it is arranged at the position where the opposite end faces when viewed from the winding central axis direction overlap,
The first coil has a first winding portion and a second winding portion that are separately wound around winding portions that constitute two opposing sides of the first core portion ,
The first winding part and the second winding part are respectively arranged in directions in which magnetic fluxes generated around the first coil cancel each other,
The second coil has a third winding portion and a fourth winding portion that are separately wound around winding portions that constitute two opposing sides of the second core portion ,
The third winding part and the fourth winding part are respectively arranged in directions in which magnetic fluxes generated around the second coil cancel each other.
An end surface on the winding portion side where the first winding portion of the first core portion is wound and an end surface on the winding portion side where the third winding portion of the second core portion is wound. Placed in overlapping positions,
An end surface on the winding portion side where the second winding portion of the first core portion is wound, and an end surface on the winding portion side where the fourth winding portion of the second core portion is wound. Placed in overlapping positions,
One end of the first winding part and one end of the third winding part are connected to the power source,
The other end of the first winding part and the other end of the third winding part are connected to one end of the second winding part and one end of the fourth winding part, respectively.
The first core portion has a first core end portion protruding from the first winding portion, and a second core end portion protruding from the second winding portion,
The second core portion has a third core end portion protruding from the third winding portion, and a fourth core end portion protruding from the fourth winding portion,
The first winding part and the third winding part are:
When a current flows from the one end of the first winding part to the other end, the direction of the magnetic flux generated in the first core part,
When a current flows from the one end of the third winding portion to the other end, the direction of the magnetic flux generated in the second core portion is wound so as to be opposite to each other,
The second winding portion and the fourth winding portion are:
When a current flows from the one end of the second winding part to the other end, the direction of magnetic flux generated in the first core part,
Interleaved DC / DC wound in such a way that the direction of the magnetic flux generated in the second core portion is opposite when the current flows from the one end to the other end of the fourth winding portion. A compound reactor used in converters .

請求項１又は２に記載の複合型リアクトルであって、
前記第１コイルと前記第２コイルとには、互いに位相のずれた電流が入力される、複合型リアクトル。 The composite reactor according to claim 1 or 2,
A composite reactor in which currents that are out of phase with each other are input to the first coil and the second coil.

請求項１から３のいずれか一項に記載の複合型リアクトルであって、
前記第１巻線部の巻線中心軸と前記第３巻線部の巻線中心軸とが共通し、かつ、前記第２巻線部の巻線中心軸と前記第４巻線部の巻線中心軸とが共通する、複合型リアクトル。 The composite reactor according to any one of claims 1 to 3,
The winding central axis of the first winding part and the winding central axis of the third winding part are common, and the winding central axis of the second winding part and the winding of the fourth winding part A compound reactor with a common line center axis.

請求項１から４のいずれか一項に記載の複合型リアクトルであって、
前記第１巻線部の巻線中心軸と前記第２巻線部の巻線中心軸とが互いに平行であり、
前記第３巻線部の巻線中心軸と前記第４巻線部の巻線中心軸とが互いに平行である、複合型リアクトル。 The composite reactor according to any one of claims 1 to 4 ,
The winding central axis of the first winding portion and the winding central axis of the second winding portion are parallel to each other;
A composite reactor in which a winding central axis of the third winding portion and a winding central axis of the fourth winding portion are parallel to each other.

請求項１から５のいずれか一項に記載の複合型リアクトルであって、
前記第１巻線部、前記第２巻線部、前記第３巻線部及び前記第４巻線部の各巻線中心軸が同一平面上に含まれる、複合型リアクトル。 A composite reactor according to any one of claims 1 to 5 ,
A composite reactor in which the winding central axes of the first winding portion, the second winding portion, the third winding portion, and the fourth winding portion are included on the same plane.

請求項１から６のいずれか一項に記載の複合型リアクトルであって、
前記第１コイルにより生じる磁束の前記磁性コアでの磁路長と、前記第２コイルにより生じる磁束の前記磁性コアでの磁路長とは等しい、複合型リアクトル。 The composite reactor according to any one of claims 1 to 6 ,
A composite reactor in which a magnetic path length of the magnetic flux generated by the first coil in the magnetic core is equal to a magnetic path length of the magnetic flux generated by the second coil in the magnetic core.

請求項７に記載の複合型リアクトルであって、
前記第１コイルにより生じる磁束の前記磁性コアでの磁路及び前記第２コイルにより生じる磁束の前記磁性コアでの磁路は、矩形ループ状の共通形状を有する、複合型リアクトル。 The composite reactor according to claim 7 ,
The magnetic path in the magnetic core of the magnetic flux generated by the first coil and the magnetic path in the magnetic core of the magnetic flux generated by the second coil have a common shape of a rectangular loop .

請求項１から８のいずれか一項に記載の複合型リアクトルであって、
前記第１コア部及び前記第２コア部はそれぞれ同形状に形成され、前記第１コア部と前記第２コア部とを組み合わせて前記磁性コアを構成する、複合型リアクトル。 The composite reactor according to any one of claims 1 to 8 ,
The first core portion and the second core portion are formed in the same shape, and the magnetic core is configured by combining the first core portion and the second core portion.