JP2013051285A5

JP2013051285A5 -

Info

Publication number: JP2013051285A5
Application number: JP2011187667A
Authority: JP
Filing date: 2011-08-30
Publication date: 2014-02-06

Description

Coil device with core for use in non-contact power supply device

本発明は、渦巻き平面状に巻いた単位コイル（即ち、同一平面上で渦巻き状態に巻いたコイルをいう）を同心上に複数層重ねたコイル装置及びコア付コイル装置に関し、例えば、非接触で電力を供給する一次コイル、二次コイルに適した非接触電力供給装置に用いるコア付コイル装置に関する。 The present invention relates to a coil device and a coil device with a core in which a plurality of unit coils wound in a spiral plane (that is, a coil wound in a spiral state on the same plane) are concentrically stacked. The present invention relates to a coil device with a core used in a non-contact power supply device suitable for a primary coil and a secondary coil for supplying power .

特許文献１には、一次コイルに高周波電流を流し、少しの距離をおいて配置された二次コイルに誘導電圧を発生させ、移動車両などに電力を供給する装置が提案されている。そして、特許文献１の図２、図３には平面状で渦巻き状に巻いた単位コイルを直列に配置したコイルが提案されている。これによって、より狭い面積で磁束密度の高い磁場を発生させることができる。 Patent Document 1 proposes a device that supplies high-frequency current to a primary coil, generates an induced voltage in a secondary coil arranged at a short distance, and supplies power to a moving vehicle or the like. 2 and 3 of Patent Document 1 propose a coil in which unit coils wound in a planar shape are arranged in series. Thereby, a magnetic field with a high magnetic flux density can be generated in a smaller area.

また、特許文献２には二次コイルを角巻として、Ｅ形コアに巻線を施した二次コイルが提案され、これによって、一次コイルからの磁束をより多く集めて高効率とした非接触電力供給装置が提案されている。 Further, Patent Document 2 proposes a secondary coil in which the secondary coil is a square winding and a winding is applied to an E-shaped core, thereby collecting more magnetic flux from the primary coil and achieving high efficiency. A power supply device has been proposed.

特許第４３１８７４２号公報（図２、図３）Japanese Patent No. 4318742 (FIGS. 2 and 3) 特開２０１０−２７３４４１号公報JP 2010-273441 A

しかしながら、特許文献１記載の技術においては、各単位コイルに渦巻き平面状に巻いた同一の単位コイルを使用しているので、単位コイルを複数重ねる場合には、一つの単位コイルの内側端部にある巻線を、次の層の単位コイルの外側端部に接続する必要がある（特許文献１の図２参照）。このため、２つの単位コイルを重ねると、各単位コイルの内側端部の線材が、コイルを半径方向に横切る必要があり、厚み方向に嵩張るという問題があった。 However, in the technique described in Patent Document 1, since the same unit coil wound in a spiral plane is used for each unit coil, when a plurality of unit coils are stacked, the inner end of one unit coil is used. It is necessary to connect a certain winding to the outer end of the unit coil of the next layer (see FIG. 2 of Patent Document 1). For this reason, when two unit coils are overlapped, there is a problem that the wire at the inner end of each unit coil needs to cross the coils in the radial direction and is bulky in the thickness direction.

また、特許文献２に記載の技術においては、特許文献１に記載のような渦巻き平面状のコイル（平面視して円形、矩形を含む）に鉄心（コア）を設ける場合、特殊な形状の鉄心を作る必要があり、鉄心の製造が困難であり、仮にできたとしても嵩張って大型となるという問題があった。 In the technique described in Patent Document 2, when an iron core (core) is provided on a spiral planar coil (including a circle and a rectangle in plan view) as described in Patent Document 1, an iron core having a special shape is provided. There is a problem that it is difficult to manufacture the iron core, and even if it is made, it is bulky and large.

本発明は、かかる事情に鑑みてなされたもので、厚み方向への嵩張りが少なく、平面視して円形状又は矩形状に渦巻き平面状に巻いたコイルに鉄心（コア）を施す場合、複数の鉄心に分割して製造及び取り扱いを容易にした非接触電力供給装置に用いるコア付コイル装置を提供することを目的とする。 The present invention has been made in view of such circumstances, and is less bulky in the thickness direction, and when a core wound on a coil wound in a circular shape or a rectangular shape in a plan view in a circular shape or a rectangular shape, It is an object of the present invention to provide a cored coil device used in a non-contact power supply device that is easily manufactured and handled by being divided into iron cores.

前記した目的に沿う本発明に係る非接触電力供給装置に用いるコア付コイル装置は、中央に開口部を有し、同一高さ位置で渦巻き状に巻回した１層又は複数層にコイルを有するコイル装置と、該コイル装置によって発生する磁場を一方向に向けるコアとを有する非接触電力供給装置に用いるコア付コイル装置において、
前記コアは前記コイル装置の束線方向（円周方向）に分割され、一方の磁極が前記コイル装置の内側にあって他方の磁極が前記コイル装置の外側にある断面コ字状の複数の分割コアからなっている。 The coil device with a core used for the non-contact power supply device according to the present invention that meets the above-described object has an opening in the center and has a coil in one layer or a plurality of layers wound spirally at the same height position. In a coil device with a core used for a non-contact power supply device having a coil device and a core for directing a magnetic field generated by the coil device in one direction,
The core is divided in a bundle direction (circumferential direction) of the coil device, and a plurality of divisions having a U-shaped cross section in which one magnetic pole is inside the coil device and the other magnetic pole is outside the coil device. It consists of a core.

本発明に係る非接触電力供給装置に用いるコア付コイル装置において、前記分割コアは平面視して矩形状となっていてもよいし、扇状となっていてもよい。 In the coil device with core used in the non-contact power supply apparatus according to the present invention, the divided core may be rectangular in a plan view or may be fan-shaped.

また、本発明に係る非接触電力供給装置に用いるコア付コイル装置において、前記コイル装置は、中央に開口部を有し、同一高さ位置で渦巻き状に巻回した複数の平面状の単位コイルを重ねて構成され、前記複数の単位コイルのうち直列接続される第１、第２の単位コイルはそれぞれ内側に向かって左巻き及び右巻きとなって、前記第１、第２の単位コイルの内側端の導線は連結されて、前記第１、第２の単位コイルの電流供給端となる導線は、前記第１、第２の単位コイルの外側にあるのが好ましい。 Moreover, in the coil device with a core used for the non-contact power supply device according to the present invention, the coil device has a plurality of planar unit coils having an opening at the center and spirally wound at the same height position. The first and second unit coils connected in series among the plurality of unit coils are respectively left-handed and right-handed toward the inside, and the inside of the first and second unit coils. It is preferable that the conducting wires at the ends are connected and the conducting wires serving as the current supply ends of the first and second unit coils are outside the first and second unit coils.

そして、本発明に係る非接触電力供給装置に用いるコア付コイル装置において、前記第１、第２の単位コイルは、それぞれ平面視して、円形、長円形（長尺のものも含む）、又は矩形に沿って渦巻き状に巻かれているのが好ましい。 And in the coil apparatus with a core used for the non-contact power supply apparatus according to the present invention, each of the first and second unit coils is circular, oval (including a long one), or It is preferably wound in a spiral shape along a rectangle.

また、本発明に係る非接触電力供給装置に用いるコア付コイル装置は、コイルの束線方向に分割された分割コアを用いているので、個々の分割コアが小さくなり、しかも、標準化が可能となるので、安価に製造可能となる。
分割コアの使用数を変えることによって種々の大きさのコイルに適応できる。 Moreover, since the coil device with a core used for the non-contact power supply device according to the present invention uses the divided cores divided in the direction of the bundle of the coils, each divided core becomes smaller and can be standardized. Therefore, it can be manufactured at low cost.
It is possible to adapt to coils of various sizes by changing the number of split cores used.

（Ａ）は本発明の第１の実施の形態に係るコイル装置の平面図、（Ｂ）は同正面図、（Ｃ）は図１（Ｂ）のＡ−Ａ’断面図、（Ｄ）は図１（Ａ）のＢ−Ｂ’断面図である。(A) is a top view of the coil apparatus which concerns on the 1st Embodiment of this invention, (B) is the same front view, (C) is AA 'sectional drawing of FIG. 1 (B), (D) is It is BB 'sectional drawing of FIG. 1 (A). （Ａ）は本発明の第２の実施の形態に係るコア付コイル装置の平面図、（Ｂ）は同正面図、（Ｃ）は図２（Ａ）におけるＣ−Ｃ’断面図である。(A) is a top view of the coil apparatus with a core concerning the 2nd Embodiment of this invention, (B) is the same front view, (C) is C-C 'sectional drawing in FIG. 2 (A). （Ａ）は本発明の第３の実施の形態に係るコア付コイル装置の平面図、（Ｂ）は同正面図、（Ｃ）は図３（Ａ）におけるＤ−Ｄ’断面図である。(A) is a top view of the coil apparatus with a core concerning the 3rd Embodiment of this invention, (B) is the same front view, (C) is D-D 'sectional drawing in FIG. 3 (A). 本発明に係るコイル装置を適用した自動車の非接触電力供給装置の説明図である。It is explanatory drawing of the non-contact electric power supply apparatus of the motor vehicle which applied the coil apparatus which concerns on this invention.

続いて、添付した図面を参照しながら、本発明を具体化した実施の形態について説明する。
図１（Ａ）〜（Ｄ）に示すように、本発明の第１の実施の形態に係るコイル装置１０は、それぞれ中央に開口部１３を備え、同一高さ位置で渦巻き状に巻回した平面状の第１、第２の単位コイル１１、１２を重ねて２層にし、しかも第１、第２の単位コイル１１、１２は直列に接続されている。以下、これらについて詳しく説明する。なお、単位コイル１１、１２を形成する線材は絶縁被覆されて隣り合う線材（導線）の絶縁が保たれている。ここで、この絶縁された線材にリッツ線を使用することもできる。 Next, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1A to 1D, the coil device 10 according to the first embodiment of the present invention has an opening 13 at the center, and is wound in a spiral shape at the same height position. The planar first and second unit coils 11 and 12 are stacked to form two layers, and the first and second unit coils 11 and 12 are connected in series. These will be described in detail below. In addition, the wire which forms the unit coils 11 and 12 is insulation-coated, and insulation of the adjacent wire (conductive wire) is maintained. Here, a litz wire can be used for the insulated wire.

第１の単位コイル１１は半径方向内側に向かって左巻きされて、その外側端部が電流供給端となる一方の導線（端子線）１４となっている。一方、第１の単位コイル１１の下側に位置する第２の単位コイル１２は、図１（Ｃ）に示すように、半径方向内側に向かって右巻きとなってその外側端部が電流供給端となる他方の導線（端子線）１５となっている。そして、第２の単位コイル１２の内側は、第１の単位コイル１１の内側導線１６と一体となって連結されている。 The first unit coil 11 is left-handed toward the inner side in the radial direction, and the outer end thereof serves as one conducting wire (terminal wire) 14 serving as a current supply end. On the other hand, as shown in FIG. 1 (C), the second unit coil 12 located below the first unit coil 11 is wound clockwise toward the inside in the radial direction, and the outer end thereof is supplied with current. The other conductive wire (terminal wire) 15 is the end. The inner side of the second unit coil 12 is connected integrally with the inner conductor 16 of the first unit coil 11.

従って、このコイル装置１０においては、上側の一方の導線１４から第１の単位コイル１１、内側導線１６、第２の単位コイル１２、下側の他方の導線１５に向かって線材が繋がり、第１の単位コイル１１、及び第２の単位コイル１２によって発生する磁場が同一方向を向くように構成されている。更に、第１、第２の単位コイル１１、１２に給電する導線１４、１５はそれぞれ第１、第２の単位コイル１１、１２と同一高さ位置となるので、第１、第２の単位コイル１１、１２を半径方向に跨がる導線が無くなり、極めてコイル装置１０がコンパクトとなる。 Therefore, in this coil device 10, the wire is connected from the upper one conducting wire 14 to the first unit coil 11, the inner conducting wire 16, the second unit coil 12, and the lower other conducting wire 15, The unit coils 11 and the second unit coil 12 are configured so that the magnetic fields generated in the same direction. Furthermore, since the conducting wires 14 and 15 that feed the first and second unit coils 11 and 12 are at the same height as the first and second unit coils 11 and 12, respectively, the first and second unit coils are provided. 11 and 12 are eliminated in the radial direction, and the coil device 10 is extremely compact.

このようなコイル装置１０は、例えば、図４に示す非接触電力供給装置１８に用いることができる。即ち、図４に示すように、複数の一次側コイル１９〜２１には、制御装置２２内に設けられた図示しないインバータが接続され、１０ｋＨｚ〜１００ｋＨｚの高周波電力を供給するようになっている。なお、各一次コイル１９〜２１には各一次コイル１９〜２１に電流を流すためのコンデンサ（図示せず）が接続され、各一次コイル１９〜２１とコンデンサで形成される共振周波数をインバータの発振周波数に近づけている。 Such a coil apparatus 10 can be used for the non-contact power supply apparatus 18 shown in FIG. 4, for example. That is, as shown in FIG. 4, an inverter (not shown) provided in the control device 22 is connected to the plurality of primary coils 19 to 21 so as to supply high frequency power of 10 kHz to 100 kHz. Each primary coil 19-21 is connected to a capacitor (not shown) for passing a current through each primary coil 19-21, and the resonance frequency formed by each primary coil 19-21 and the capacitor is oscillated by an inverter. It is close to the frequency.

一方、車両の一例である自動車２３の底部には、コイル装置１０が配置され、一次コイル１９〜２１のいずれか１によって発生した交番磁場によって二次コイルとなるコイル装置１０に電力を発生させている。この場合、二次コイルに更にコイルとコンデンサを直列に接続した共振コイルを設けることもできる。
コイル装置１０によって発生した電力は図示しない制御部によって直流に変換され、自動車２３に搭載されている電池を充電する。これによって、自動車２３に搭載されている電池に非接触で充電することができる。なお、２４は自動車２３への充電状況を知らせる監視パネルを示す。 On the other hand, a coil device 10 is arranged at the bottom of an automobile 23 which is an example of a vehicle, and electric power is generated in the coil device 10 serving as a secondary coil by an alternating magnetic field generated by any one of the primary coils 19 to 21. Yes. In this case, a resonance coil in which a coil and a capacitor are connected in series can also be provided on the secondary coil.
Electric power generated by the coil device 10 is converted into direct current by a control unit (not shown), and a battery mounted on the automobile 23 is charged. As a result, the battery mounted on the automobile 23 can be charged in a non-contact manner. Reference numeral 24 denotes a monitoring panel that informs the charging state of the automobile 23.

続いて、本発明の第２の実施の形態に係るコア付コイル装置２６について説明する。図４に示す実施の形態においては、一次コイル１９〜２１から発生した磁場は一次コイル１９〜２１の上下方向に発するので、一次コイル１９〜２１の下側に導電体（例えば、加湿された土や、金属片）があると渦電流が発生して誘導加熱されるので、電力として損失を生じる。 Next, the cored coil device 26 according to the second embodiment of the present invention will be described. In the embodiment shown in FIG. 4, the magnetic field generated from the primary coils 19 to 21 is generated in the vertical direction of the primary coils 19 to 21. Therefore, a conductor (for example, humidified soil) is provided below the primary coils 19 to 21. If there is a metal piece), an eddy current is generated and induction heating is performed, so that loss occurs as electric power.

これを防止するため、例えば、一次コイル１９〜２１の底部及び側部にフェライトコア等を配置して漏れ磁束が生じないようにしている。更に、コイル装置１０においても、上側が開放した状態では、例えば二次側に共振コイル等を設けると、発生する磁場の漏洩が減少する。 In order to prevent this, for example, a ferrite core or the like is disposed on the bottom and side portions of the primary coils 19 to 21 so that no leakage magnetic flux is generated. Furthermore, also in the coil apparatus 10, in the state where the upper side is open, for example, if a resonance coil or the like is provided on the secondary side, leakage of the generated magnetic field is reduced.

図２（Ａ）〜（Ｃ）にはこのような目的に適したコア付コイル装置２６を示すが、コイル装置１０の内側の開口部１３と外側領域を跨いで、平面視して矩形状で断面コ字状の複数の分割コア２７が束線方向に設けられている。この分割コア２７はコア装置１０の側部（内側と外側）に当接又は近接する磁極２８、２９とこの磁極２８、２９を繋ぐヨーク３０とを有し、これらによって形成される溝内にコイル装置１０の第１、第２の単位コイル１１、１２が嵌入している。
これらの分割コア２７は例えばフィライトコアからなって、同一形状のものが複数使用されている。 FIGS. 2A to 2C show a cored coil device 26 suitable for such a purpose. However, the cored coil device 26 has a rectangular shape in plan view, straddling the inner opening 13 and the outer region of the coil device 10. A plurality of split cores 27 having a U-shaped cross section are provided in the bundle line direction. The split core 27 has magnetic poles 28 and 29 that are in contact with or close to the side portions (inner side and outer side) of the core device 10 and a yoke 30 that connects the magnetic poles 28 and 29. The first and second unit coils 11 and 12 of the device 10 are fitted.
These divided cores 27 are made of, for example, a philite core, and a plurality of ones having the same shape are used.

これによって、コイル装置１０の磁場は一方向（この実施の形態では下側）に集中するので、これを一次コイル又は二次コイルに使用しても、効率のよい磁気回路を構成できる。なお、コイル装置１０に、第１、第２の単位コイル１１、１２の他に共振コイルを別途設けることも可能である。 As a result, the magnetic field of the coil device 10 is concentrated in one direction (lower side in this embodiment), so that an efficient magnetic circuit can be configured even if this is used for the primary coil or the secondary coil. In addition to the first and second unit coils 11 and 12, a resonance coil can be separately provided in the coil device 10.

次に、図３を参照しながら、本発明の第３の実施の形態に係るコア付コイル装置３２について説明するが、第２の実施の形態に係るコア付コイル装置２６と相違する点は、各分割コア３３がコイル装置１０の中心を通る半径線によって円周方向に複数に分割されており、各分割コア３３が平面視して扇状になっていることである。 Next, the cored coil device 32 according to the third embodiment of the present invention will be described with reference to FIG. 3. The difference from the cored coil device 26 according to the second embodiment is as follows. Each divided core 33 is divided into a plurality of parts in the circumferential direction by a radial line passing through the center of the coil device 10, and each divided core 33 has a fan shape in plan view.

従って、各分割コア３３は円周方向に幅広の磁極３４と、円周方向に幅狭の磁極３５と、これらを連結するヨーク３６とを有している。これによって、より強固にコイル装置１０から発生する磁束を一方向に向けて、非接触電力供給装置の電力変換効率を高めることができる。 Therefore, each divided core 33 has a magnetic pole 34 that is wide in the circumferential direction, a magnetic pole 35 that is narrow in the circumferential direction, and a yoke 36 that connects them. Thereby, the magnetic flux generated from the coil device 10 can be more firmly directed in one direction, and the power conversion efficiency of the non-contact power supply device can be increased.

本発明は前記した実施の形態に限定されるものではなく、本発明の要旨を変更しない範囲でその構成を変更することもできる。
例えば、前記実施の形態においては、コイル装置は上下に重なる第１の単位コイル、第２の単位コイルによって構成されていたが、更に多くの単位コイルを重ねることもできる。この場合、単位コイルを偶数層とすることによって、コイル装置に電力を供給する端部側導線をコイル装置の外側から出すことができる。
また、前記実施の形態において、第１、第２の単位コイルは、それぞれ平面視して円形に沿って渦巻き状に巻かれていたが、長円形又は矩形に沿って渦巻き状に巻いてもよい。 The present invention is not limited to the above-described embodiment, and the configuration thereof can be changed without changing the gist of the present invention.
For example, in the above-described embodiment, the coil device is configured by the first unit coil and the second unit coil that are stacked one above the other, but more unit coils can be stacked. In this case, by making the unit coil an even-numbered layer, the end side conducting wire for supplying electric power to the coil device can be extended from the outside of the coil device.
Moreover, in the said embodiment, although the 1st, 2nd unit coil was wound spirally along the circular shape in planar view, respectively, you may wind spirally along an ellipse or a rectangle. .

１０：コイル装置、１１：第１の単位コイル、１２：第２の単位コイル、１３：開口部、１４、１５：導線、１６：内側導線、１８：非接触電力供給装置、１９〜２１：一次コイル、２２：制御装置、２３：自動車、２４：監視パネル、２６：コア付コイル装置、２７：分割コア、２８、２９：磁極、３０：ヨーク、３２：コア付コイル装置、３３：分割コイル、３４、３５：磁極、３６：ヨーク
DESCRIPTION OF SYMBOLS 10: Coil apparatus, 11: 1st unit coil, 12: 2nd unit coil, 13: Opening part, 14, 15: Conductor, 16: Inner conductor, 18: Non-contact electric power supply apparatus, 19-21: Primary Coil, 22: control device, 23: automobile, 24: monitoring panel, 26: coil device with core, 27: split core, 28, 29: magnetic pole, 30: yoke, 32: coil device with core, 33: split coil, 34, 35: magnetic pole, 36: yoke

Claims

A coil device having an opening in the center and having a coil in one or more layers wound in a spiral at the same height, and a core for directing a magnetic field generated by the coil device in one direction In the coil device,
The core is divided into a bundle line direction of the coil device, and is composed of a plurality of divided cores having a U-shaped cross section in which one magnetic pole is inside the coil device and the other magnetic pole is outside the coil device. The coil apparatus with a core used for the non-contact electric power supply apparatus characterized by the above.

In the coil device with core for use in a non-contact power supply device according to claim 1, wherein the split cores are cores with a coil device for use in a non-contact power supply system, characterized in that has a fan shape in plan view.

The coil device with a core used for the non-contact power supply device according to claim 1 or 2 , wherein the coil device has an opening at the center and is wound in a spiral shape at the same height position. The first and second unit coils, which are configured by overlapping coils and are connected in series among the plurality of unit coils, are respectively left-handed and right-handed toward the inside, and the first and second unit coils A non-contact power supply device in which a conducting wire at an inner end is connected, and a conducting wire serving as a current supply end of the first and second unit coils is outside the first and second unit coils. Cored coil device used for

4. The coil device with a core used in the non-contact power supply apparatus according to claim 3 , wherein the first and second unit coils are wound in a spiral shape along a circle, an oval, or a rectangle in plan view. The coil apparatus with a core used for the non-contact electric power supply apparatus characterized by the above -mentioned .