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JP2012010533A - Power transmission system, and power supply device and portable apparatus therefor - Google Patents

Power transmission system, and power supply device and portable apparatus therefor
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JP2012010533A
JP2012010533AJP2010145731AJP2010145731AJP2012010533AJP 2012010533 AJP2012010533 AJP 2012010533AJP 2010145731 AJP2010145731 AJP 2010145731AJP 2010145731 AJP2010145731 AJP 2010145731AJP 2012010533 AJP2012010533 AJP 2012010533A
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coil
power
spiral inductor
inner diameter
transmission system
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Shinji Goma
真治 郷間
Satoshi Shinoda
悟史 篠田
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Murata Manufacturing Co Ltd
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Murata Manufacturing Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a power transmission system capable of attaining miniaturization of a coil on a power reception side while maintaining capability of transmitting electric power, and to provide a power supply device and a portable apparatus therefor.SOLUTION: The power transmission system 1 comprises a charging station (a power supply device) 2 that supplies electric power and a mobile phone (a power reception device) 3 that receives supply of the electric power. The charging station 2 includes a flat plate-like coil (a first coil) 21 and a magnet 22 disposed on an inside-diameter portion of the coil 21. The mobile phone 3 has a spiral inductor (a second coil) 31 whose outside diameter is substantially the same as or smaller than an inside diameter of the coil 21. The spiral inductor 31 is constituted of a soft magnetic substance layer 31a and a coil conductor 31b.

Description

Translated fromJapanese

本発明は、物理的に接続することなく電力を伝送する電力伝送システム、該電力伝送システムの給電装置及び携帯機器に関する。  The present invention relates to a power transmission system that transmits power without being physically connected, a power supply apparatus for the power transmission system, and a portable device.

近年、非接触で電力を伝送して充電する通信機等の電子機器が開発されている。電子機器において非接触で電力を伝送するためには、電力の給電側の電子機器と、電力の受電側の電子機器との双方に非接触型電力伝送用のコイルを設ける必要がある。  2. Description of the Related Art In recent years, electronic devices such as communication devices that are charged by transmitting power without contact have been developed. In order to transmit electric power in an electronic device in a non-contact manner, it is necessary to provide a coil for non-contact power transmission in both the electronic device on the power supply side and the electronic device on the power reception side.

また、電力の給電側のコイルと、電力の受電側のコイルとで、位置合わせを行わないと、効果的に電力を伝送することができない。そこで、例えば特許文献1では、電力の給電側の電子機器、受電側の電子機器の双方のコイルの中心部分に磁石を配置し、両磁石間の引き合う力を利用して電力の給電側のコイルと、電力の受電側のコイルとで、位置合わせを行っていた。  Moreover, unless alignment is performed between the coil on the power feeding side and the coil on the power receiving side, the power cannot be effectively transmitted. Therefore, in Patent Document 1, for example, a magnet is arranged in the center of both coils of the power supply side electronic device and the power reception side electronic device, and the power supply side coil is utilized by using the attractive force between the two magnets. And positioning with the coil on the power receiving side.

特開2009−095072号公報JP 2009-095072 A

しかし、電力の給電側の電子機器、受電側の電子機器の双方のコイルの中心部分に磁石を配置するためには、コイル自体をある程度の大きさにする必要があり、小型化することが困難になるという問題点があった。特に受電側の電子機器、例えば携帯電話機に組み込む場合、コイルが一定以上の大きさを要することから、裏蓋と一体化させる案が有力であるが、電池近傍における発熱の問題等があり、コイルの大きさが携帯電話機の設計上の大きな制約条件となっている。  However, in order to place a magnet in the central part of the coil of both the electronic device on the power supply side and the electronic device on the power reception side, it is necessary to make the coil itself a certain size, and it is difficult to reduce the size. There was a problem of becoming. In particular, when it is incorporated into an electronic device on the power receiving side, for example, a mobile phone, the coil needs to be larger than a certain size. Therefore, it is a good idea to integrate it with the back cover, but there is a problem of heat generation near the battery. This is a major constraint on the design of mobile phones.

本発明は、上記事情に鑑みてなされたものであり、電力を伝送する能力を維持しつつ、受電側のコイルを小型化することができる電力伝送システム、該電力伝送システムの給電装置及び携帯機器を提供することを目的とする。  The present invention has been made in view of the above circumstances, and can maintain a capability of transmitting power while reducing the size of a coil on a power receiving side, a power feeding device of the power transmission system, and a portable device The purpose is to provide.

上記目的を達成するために第1発明に係る電力伝送システムは、電力を供給する給電装置と、電力の供給を受ける受電装置とを備える電力伝送システムにおいて、前記給電装置は、平板状の第一のコイルと、該第一のコイルの内径部分に配置された磁石とを備え、前記受電装置は、前記第一のコイルの内径と略同じ又は該内径より小さい外径の第二のコイルを備え、該第二のコイルは、軟磁性体層とコイル導体とで構成されたスパイラルインダクタである。  In order to achieve the above object, a power transmission system according to a first aspect of the present invention is a power transmission system including a power supply device that supplies power and a power reception device that receives the supply of power. And a magnet disposed on an inner diameter portion of the first coil, and the power receiving device includes a second coil having an outer diameter substantially the same as or smaller than the inner diameter of the first coil. The second coil is a spiral inductor composed of a soft magnetic layer and a coil conductor.

また、第2発明に係る電力伝送システムは、第1発明において、前記スパイラルインダクタは、前記給電装置に対向している面側の漏れ磁束が、対向している該面側とは反対の面側の漏れ磁束より大きくなるようにしてある。  The power transmission system according to a second aspect of the present invention is the power transmission system according to the first aspect, wherein the spiral inductor has a surface on the opposite side to the surface facing the leakage magnetic flux on the surface facing the power feeding device. It is designed to be larger than the leakage magnetic flux.

また、第3発明に係る電力伝送システムは、第1又は第2発明において、前記スパイラルインダクタは、前記給電装置に対向している面側とは反対の面側に、回路基板を実装するようにしてある。  The power transmission system according to a third aspect of the present invention is the power transmission system according to the first or second aspect, wherein the spiral inductor has a circuit board mounted on a surface opposite to a surface facing the power feeding device. It is.

上記目的を達成するために第4発明に係る給電装置は、軟磁性体層とコイル導体とで構成されたスパイラルインダクタを備える受電装置に対して、電力を供給する給電装置であって、平板状のコイルと、該コイルの内径部分に配置された磁石とを備え、前記コイルの内径は、前記受電装置の前記コイル導体の外径と略同じ又は該外径より大きい。  In order to achieve the above object, a power feeding device according to a fourth aspect of the present invention is a power feeding device that supplies power to a power receiving device including a spiral inductor composed of a soft magnetic layer and a coil conductor, and has a flat plate shape. And a magnet disposed on an inner diameter portion of the coil, and the inner diameter of the coil is substantially the same as or larger than the outer diameter of the coil conductor of the power receiving device.

上記目的を達成するために第5発明に係る携帯機器は、平板状のコイルと、該コイルの内径部分に配置された磁石とを備える給電装置から電力の供給を受ける携帯機器であって、軟磁性体層とコイル導体とで構成されたスパイラルインダクタと、該スパイラルインダクタと離隔して配置され、二次電池を収納している電池収納部とを備え、前記コイル導体の外径は、前記給電装置の前記コイルの内径と略同じ又は該内径より小さい。  In order to achieve the above object, a portable device according to a fifth aspect of the present invention is a portable device that is supplied with electric power from a power feeding device that includes a flat coil and a magnet disposed on an inner diameter portion of the coil, and is a soft device. A spiral inductor composed of a magnetic material layer and a coil conductor; and a battery storage part that is spaced apart from the spiral inductor and stores a secondary battery. The outer diameter of the coil conductor is the power supply It is substantially the same as or smaller than the inner diameter of the coil of the apparatus.

第1発明では、給電装置が、平板状の第一のコイルと、該第一のコイルの内径部分に配置された磁石とを備え、受電装置が、第一のコイルの内径と略同じ又は該内径より小さい外径の第二のコイルを備えるので、給電装置の第一のコイルと受電装置の第二のコイルとの結合係数は低下するが、第一のコイルの内径部分に配置された磁石により、エネルギーの保持と損失との関係を示す指標であるQ値を高くすることができるため、電力を伝送する能力を維持することができる。また、第一のコイルの内径部分に配置された磁石と受電装置の軟磁性体層との間の引き合う力を利用して、給電装置の第一のコイルと受電装置の第二のコイルとの位置合わせを容易に行うことができる。さらに、受電装置の第二のコイルをスパイラルインダクタとすることで、受電側(受電装置)のコイル(第二のコイル)を小型化することができる。  In the first invention, the power supply device includes a flat plate-like first coil and a magnet disposed on an inner diameter portion of the first coil, and the power receiving device is substantially the same as the inner diameter of the first coil, or the Since the second coil having the outer diameter smaller than the inner diameter is provided, the coupling coefficient between the first coil of the power feeding device and the second coil of the power receiving device is reduced, but the magnet disposed in the inner diameter portion of the first coil Thus, the Q value, which is an index indicating the relationship between energy retention and loss, can be increased, so that the ability to transmit power can be maintained. Further, by utilizing the attractive force between the magnet disposed on the inner diameter portion of the first coil and the soft magnetic layer of the power receiving device, the first coil of the power feeding device and the second coil of the power receiving device Positioning can be performed easily. Furthermore, the coil (second coil) on the power receiving side (power receiving device) can be reduced in size by using the second coil of the power receiving device as a spiral inductor.

第2発明では、スパイラルインダクタは、給電装置に対向している面側の漏れ磁束が、対向している該面側とは反対の面側の漏れ磁束よりも大きくなるようにしてあるので、給電装置に対向している面側とは反対の面側からの磁束の漏れを抑えて、給電装置の第一のコイルとの電磁結合に利用される磁束を大きくすることができ、電力を伝送する能力を維持することができる。  In the second invention, the spiral inductor is configured such that the leakage magnetic flux on the surface facing the power feeding device is larger than the leakage magnetic flux on the surface opposite to the facing surface. By suppressing leakage of magnetic flux from the surface opposite to the surface facing the device, the magnetic flux used for electromagnetic coupling with the first coil of the power supply device can be increased, and power is transmitted. Ability can be maintained.

第3発明では、スパイラルインダクタは、給電装置に対向している面とは反対の面側に、回路基板を実装するようにしてあるので、スパイラルインダクタと回路基板とで構成されるコイルモジュールを小型化して、受電装置を小型化することができる。  In the third aspect of the invention, the spiral inductor is configured such that the circuit board is mounted on the surface opposite to the surface facing the power feeding device, so that the coil module composed of the spiral inductor and the circuit board is reduced in size. Thus, the power receiving device can be reduced in size.

第4発明では、軟磁性体層とコイル導体とで構成されたスパイラルインダクタを備える受電装置に対して、電力を供給する給電装置であって、平板状のコイルと、該コイルの内径部分に配置された磁石とを備え、コイルの内径は、受電装置のコイル導体の外径と略同じ又は該外径より大きいので、給電装置のコイルと受電装置のコイル導体との結合係数は低下するが、コイルの内径部分に配置された磁石により、Q値を高くすることができるため、電力を伝送する能力を維持することができる。また、コイルの内径部分に配置された磁石と受電装置の軟磁性体層との間の引き合う力を利用して、給電装置のコイルと受電装置のコイル導体との位置合わせを容易に行うことができる。  According to a fourth aspect of the present invention, there is provided a power feeding device that supplies power to a power receiving device including a spiral inductor composed of a soft magnetic material layer and a coil conductor, and is arranged on a flat coil and an inner diameter portion of the coil The inner diameter of the coil is substantially the same as or larger than the outer diameter of the coil conductor of the power receiving device, so that the coupling coefficient between the coil of the power feeding device and the coil conductor of the power receiving device decreases. Since the Q value can be increased by the magnet disposed in the inner diameter portion of the coil, the ability to transmit electric power can be maintained. Further, it is possible to easily align the coil of the power feeding device and the coil conductor of the power receiving device by using the attractive force between the magnet disposed on the inner diameter portion of the coil and the soft magnetic layer of the power receiving device. it can.

第5発明では、平板状のコイルと、該コイルの内径部分に配置された磁石とを備える給電装置から電力の供給を受ける携帯機器であって、軟磁性体層とコイル導体とで構成されたスパイラルインダクタと、該スパイラルインダクタと離隔して配置され、二次電池を収納している電池収納部とを備えるので、給電装置から電力の供給を受けてスパイラルインダクタが発熱しても電池収納部に熱が伝わりにくく、二次電池の劣化を抑えることができる。また、スパイラルインダクタのコイル導体の外径は、給電装置のコイルの内径と略同じ又は該内径より小さいので、携帯機器を小型化することができる。さらに、給電装置の磁石とスパイラルインダクタの軟磁性体層との間の引き合う力を利用して、給電装置のコイルとスパイラルインダクタのコイル導体との位置合わせを容易に行うことができる。  According to a fifth aspect of the present invention, there is provided a portable device that is supplied with electric power from a power supply device that includes a flat coil and a magnet disposed on an inner diameter portion of the coil, and includes a soft magnetic layer and a coil conductor. Since it includes a spiral inductor and a battery storage unit that is spaced apart from the spiral inductor and stores a secondary battery, even if the spiral inductor generates heat when receiving power from the power supply device, the battery storage unit It is difficult for heat to be transmitted and deterioration of the secondary battery can be suppressed. Further, since the outer diameter of the coil conductor of the spiral inductor is substantially the same as or smaller than the inner diameter of the coil of the power feeding device, the portable device can be reduced in size. Furthermore, it is possible to easily align the coil of the power supply device and the coil conductor of the spiral inductor using the attractive force between the magnet of the power supply device and the soft magnetic layer of the spiral inductor.

本発明に係る電力伝送システムでは、給電装置が、平板状の第一のコイルと、該第一のコイルの内径部分に配置された磁石とを備え、受電装置が、第一のコイルの内径と略同じ又は該内径より小さい外径の第二のコイルを備えるので、給電装置の第一のコイルと受電装置の第二のコイルとの結合係数は低下するが、第一のコイルの内径部分に配置された磁石により、エネルギーの保持と損失との関係を示す指標であるQ値を高くすることができるため、電力を伝送する能力を維持することができる。また、第一のコイルの内径部分に配置された磁石と受電装置の軟磁性体層との間の引き合う力を利用して、給電装置の第一のコイルと受電装置の第二のコイルとの位置合わせを容易に行うことができる。さらに、受電装置の第二のコイルをスパイラルインダクタとすることで、受電側(受電装置)のコイル(第二のコイル)を小型化することができる。  In the power transmission system according to the present invention, the power feeding device includes a flat plate-shaped first coil and a magnet disposed on an inner diameter portion of the first coil, and the power receiving device has an inner diameter of the first coil. Since a second coil having an outer diameter that is substantially the same or smaller than the inner diameter is provided, the coupling coefficient between the first coil of the power feeding device and the second coil of the power receiving device decreases, but the inner diameter portion of the first coil Since the arranged magnets can increase the Q value, which is an index indicating the relationship between energy retention and loss, the ability to transmit power can be maintained. Further, by utilizing the attractive force between the magnet disposed on the inner diameter portion of the first coil and the soft magnetic layer of the power receiving device, the first coil of the power feeding device and the second coil of the power receiving device Positioning can be performed easily. Furthermore, the coil (second coil) on the power receiving side (power receiving device) can be reduced in size by using the second coil of the power receiving device as a spiral inductor.

また、本発明に係る給電装置は、軟磁性体層とコイル導体とで構成されたスパイラルインダクタを備える受電装置に対して、電力を供給する給電装置であって、平板状のコイルと、該コイルの内径部分に配置された磁石とを備え、コイルの内径は、受電装置のコイル導体の外径と略同じ又は該外径より大きいので、給電装置のコイルと受電装置のコイル導体との結合係数は低下するが、コイルの内径部分に配置された磁石により、Q値を高くすることができるため、電力を伝送する能力を維持することができる。  A power supply device according to the present invention is a power supply device that supplies power to a power reception device including a spiral inductor composed of a soft magnetic material layer and a coil conductor, and includes a flat coil and the coil And the inner diameter of the coil is substantially the same as or larger than the outer diameter of the coil conductor of the power receiving device, so that the coupling coefficient between the coil of the power feeding device and the coil conductor of the power receiving device However, since the Q value can be increased by the magnet disposed in the inner diameter portion of the coil, the ability to transmit electric power can be maintained.

さらに、本発明に係る携帯機器は、平板状のコイルと、該コイルの内径部分に配置された磁石とを備える給電装置から電力の供給を受ける携帯機器であって、軟磁性体層とコイル導体とで構成されたスパイラルインダクタと、該スパイラルインダクタと離隔して配置され、二次電池を収納している電池収納部とを備えるので、給電装置から電力の供給を受けてスパイラルインダクタが発熱しても電池収納部に熱が伝わりにくく、二次電池の劣化を抑えることができる。  Furthermore, a portable device according to the present invention is a portable device that is supplied with electric power from a power supply device that includes a flat coil and a magnet disposed on an inner diameter portion of the coil, and includes a soft magnetic layer and a coil conductor. And a battery storage part that is spaced apart from the spiral inductor and stores the secondary battery, the spiral inductor generates heat upon receiving power supply from the power supply device. However, it is difficult for heat to be transmitted to the battery housing, and the deterioration of the secondary battery can be suppressed.

本発明の実施の形態に係る電力伝送システムの構成を示す模式図である。It is a schematic diagram which shows the structure of the electric power transmission system which concerns on embodiment of this invention.本発明の実施の形態に係る充電台が備えるコイル、磁石、回路基板の構成を示す模式図である。It is a schematic diagram which shows the structure of the coil with which the charging stand which concerns on embodiment of this invention is equipped, a magnet, and a circuit board.本発明の実施の形態に係るスパイラルインダクタの構成を示す断面図である。It is sectional drawing which shows the structure of the spiral inductor which concerns on embodiment of this invention.本発明の実施の形態に係るスパイラルインダクタの構成を分解して示す平面図である。It is a top view which decomposes | disassembles and shows the structure of the spiral inductor which concerns on embodiment of this invention.本発明の実施の形態に係る電力伝送システムの回路構成の一部を示す回路図である。It is a circuit diagram which shows a part of circuit structure of the electric power transmission system which concerns on embodiment of this invention.

以下、本発明の実施の形態における電力伝送システム、該電力伝送システムの給電装置及び携帯機器について、図面を用いて具体的に説明する。以下の実施の形態は、特許請求の範囲に記載された発明を限定するものではなく、実施の形態の中で説明されている特徴的事項の組み合わせの全てが解決手段の必須事項であるとは限らないことは言うまでもない。  Hereinafter, a power transmission system, a power supply device of the power transmission system, and a portable device according to an embodiment of the present invention will be specifically described with reference to the drawings. The following embodiments do not limit the invention described in the claims, and all combinations of characteristic items described in the embodiments are essential to the solution. It goes without saying that it is not limited.

なお、本発明の実施の形態に係る電力伝送システムの携帯機器には、例えばミュージックプレイヤー、携帯電話機、キーレスシステムの携帯機等が含まれるが、以下の説明では、携帯機器が携帯電話機である場合について説明する。  The portable device of the power transmission system according to the embodiment of the present invention includes, for example, a music player, a portable phone, a portable device of a keyless system, etc., but in the following description, the portable device is a portable phone. Will be described.

図1は、本発明の実施の形態に係る電力伝送システムの構成を示す模式図である。図1(a)は、充電台に携帯電話機を載置した状態の断面を示す模式図、図1(b)は、携帯電話機の充電台に載置する側の面の断面を示す模式図である。本発明の実施の形態に係る電力伝送システム1は、電力を供給する給電装置である充電台2、電力の供給を受ける受電装置である携帯電話機3を備える。充電台2は、平板状のコイル(第一のコイル)21、コイル21の内径部分に配置された磁石22、コイル21から供給する電力を制御する複数の電子部品23aを実装した回路基板23を備える。回路基板23は、電源であるACアダプタ4と接続されている。  FIG. 1 is a schematic diagram showing a configuration of a power transmission system according to an embodiment of the present invention. FIG. 1A is a schematic diagram showing a cross section of a state where a mobile phone is placed on a charging stand, and FIG. 1B is a schematic view showing a cross section of a surface of the mobile phone on the side where the mobile phone is placed. is there. A power transmission system 1 according to an embodiment of the present invention includes acharging stand 2 that is a power supply device that supplies power, and amobile phone 3 that is a power receiving device that receives power. The chargingstand 2 includes acircuit board 23 on which a flat coil (first coil) 21, amagnet 22 disposed on an inner diameter portion of thecoil 21, and a plurality ofelectronic components 23 a that control power supplied from thecoil 21 are mounted. Prepare. Thecircuit board 23 is connected to anAC adapter 4 that is a power source.

図2は、本発明の実施の形態に係る充電台2が備えるコイル21、磁石22、回路基板23の構成を示す模式図である。コイル21は、銅線等の導体を、同一平面で渦巻状に形成している。コイル21の外形は、略円形に形成しているが、略楕円形に形成しても、略四角形に形成しても良い。コイル21は、フェライト等の磁性体材料を粉体にして混練した硬化性樹脂で形成された樹脂構造体24に内蔵されている。ただし、コイル21は、携帯電話機3を載置する側の面にて、樹脂構造体24から露出している。なお、樹脂構造体24に代えて、コイル21の一面に磁性体シートを固着しても良い。  FIG. 2 is a schematic diagram showing the configuration of thecoil 21, themagnet 22, and thecircuit board 23 provided in the chargingstand 2 according to the embodiment of the present invention. Thecoil 21 has a conductor such as a copper wire formed in a spiral shape on the same plane. The outer shape of thecoil 21 is formed in a substantially circular shape, but may be formed in a substantially elliptical shape or a substantially rectangular shape. Thecoil 21 is built in aresin structure 24 formed of a curable resin obtained by kneading a magnetic material such as ferrite into powder. However, thecoil 21 is exposed from theresin structure 24 on the surface on which themobile phone 3 is placed. Instead of theresin structure 24, a magnetic sheet may be fixed to one surface of thecoil 21.

磁石22は、アルニコ磁石、フェライト磁石、ネオジム磁石等の永久磁石を用いて、コイル21の内径部分に配置されている。磁石22の外径は、コイル21の内径の約80%以下で、コイル21の中心を含むコイル21の内径に磁石22が配置されている。なお、磁石22の外径をコイル21の内径の約80%以下に限定しているのは、充電台2と後述する携帯電話機3との位置合わせを行う場合に、携帯電話機3のスパイラルインダクタ31をコイル21の中心に引き込むためである。  Themagnet 22 is disposed on the inner diameter portion of thecoil 21 using a permanent magnet such as an alnico magnet, a ferrite magnet, or a neodymium magnet. The outer diameter of themagnet 22 is about 80% or less of the inner diameter of thecoil 21, and themagnet 22 is disposed on the inner diameter of thecoil 21 including the center of thecoil 21. The reason why the outer diameter of themagnet 22 is limited to about 80% or less of the inner diameter of thecoil 21 is that thespiral inductor 31 of themobile phone 3 is used when the chargingstand 2 and themobile phone 3 described later are aligned. This is because thecoil 21 is drawn into the center of thecoil 21.

回路基板23は、コイル21で伝送する電力を制御する複数の電子部品23aが実装してあり、例えば、少なくとも電力制御回路、インバータ回路を構成する電子部品23aを実装してある。回路基板23は、コイル21との接続のためのコネクタ23bと、ACアダプタ4との接続のためのコネクタ23cとを設けてある。  Thecircuit board 23 is mounted with a plurality ofelectronic components 23a for controlling the power transmitted by thecoil 21, for example, at least anelectronic component 23a constituting a power control circuit and an inverter circuit. Thecircuit board 23 is provided with aconnector 23 b for connection with thecoil 21 and aconnector 23 c for connection with theAC adapter 4.

図1に戻って、携帯電話機3は、スパイラルインダクタ(第二のコイル)31、スパイラルインダクタ31と離隔して配置され、二次電池32を収納している電池収納部33を備える。スパイラルインダクタ31は、軟磁性体層31a、コイル導体31bとで構成され、コイル導体31bの外径は、充電台2のコイル21の内径と略同じであるか、又は該内径より小さい。コイル導体31bの外径を、充電台2のコイル21の内径と略同じ又は該内径より小さくすることでスパイラルインダクタ31を小型化することができ、スパイラルインダクタ31を組み込んだ携帯電話機3を小型化することができる。なお、充電台2のコイル21に対してスパイラルインダクタ31のコイル導体31bを小さくすると、充電台2のコイル21と携帯電話機3のスパイラルインダクタ31とを電磁結合させて電力を伝送する場合の結合係数が低下して、電力を伝送する能力(伝送効率)が低下する。しかし、本発明の実施の形態に係る電力伝送システム1では、充電台2のコイル21の内径部分に磁石22を配置することにより、エネルギーの保持と損失との関係を示す指標であるQ値を高くすることができるため、電力を伝送する能力を維持することができる。  Returning to FIG. 1, themobile phone 3 includes a spiral inductor (second coil) 31, abattery storage portion 33 that is spaced apart from thespiral inductor 31 and stores thesecondary battery 32. Thespiral inductor 31 includes a softmagnetic layer 31a and acoil conductor 31b. The outer diameter of thecoil conductor 31b is substantially the same as or smaller than the inner diameter of thecoil 21 of the chargingstand 2. By making the outer diameter of thecoil conductor 31b substantially the same as or smaller than the inner diameter of thecoil 21 of the chargingstand 2, thespiral inductor 31 can be reduced in size, and themobile phone 3 incorporating thespiral inductor 31 can be reduced in size. can do. If thecoil conductor 31b of thespiral inductor 31 is made smaller than thecoil 21 of the chargingbase 2, the coupling coefficient in the case where thecoil 21 of the chargingbase 2 and thespiral inductor 31 of themobile phone 3 are electromagnetically coupled to transmit power. Decreases, and the ability to transmit power (transmission efficiency) decreases. However, in the power transmission system 1 according to the embodiment of the present invention, by arranging themagnet 22 in the inner diameter portion of thecoil 21 of the chargingstand 2, the Q value that is an index indicating the relationship between energy retention and loss is obtained. Since the power can be increased, the ability to transmit power can be maintained.

また、スパイラルインダクタ31を小型化することで、スパイラルインダクタ31を、二次電池32を収納している電池収納部33と離隔して配置することが可能となる。つまり、スパイラルインダクタ31を電池収納部33に接触することなく配置することで、充電台2から電力の供給を受けてスパイラルインダクタ31が発熱しても電池収納部33に熱が伝わりにくく、二次電池32の劣化を抑えることができる。  Further, by reducing the size of thespiral inductor 31, thespiral inductor 31 can be arranged separately from thebattery storage portion 33 that stores thesecondary battery 32. That is, by disposing thespiral inductor 31 without contacting thebattery housing portion 33, even when thespiral inductor 31 generates heat when receiving power from the chargingstand 2, heat is not easily transmitted to thebattery housing portion 33, and the secondary Deterioration of thebattery 32 can be suppressed.

さらに、スパイラルインダクタ31について詳しく説明する。図3は、本発明の実施の形態に係るスパイラルインダクタ31の構成を示す断面図である。図4は、本発明の実施の形態に係るスパイラルインダクタ31の構成を分解して示す平面図である。図4(a)は第一層311を、図4(b)は第二層312を、図4(c)は第三層313を、図4(d)は第四層314を、図4(e)は第五層315を、図4(f)は第六層316を、図4(g)は第七層317を、図4(h)は第八層318を、それぞれ示している。図3に示すように、スパイラルインダクタ31は、八つの層311〜318、第一層311の一方の面に形成されたランド電極320で構成されている。第一層311は、非磁性フェライトからなる非磁性体層31cである。第二層312は、透磁率の高い軟磁性材料(例えば、Ni−Zn−Cuフェライト等のフェライト系材料)からなる軟磁性体層31aである。透磁率の高い軟磁性材料からなる軟磁性体層31aの第三層313、第四層314、第六層316及び第七層317に、導電性材料(例えば、Cu等)からなるコイル導体31bが形成されている。非磁性フェライトからなる非磁性体層31cの第五層315及び第八層318に、導電性材料からなるコイル導体31bが形成されている。  Further, thespiral inductor 31 will be described in detail. FIG. 3 is a cross-sectional view showing the configuration of thespiral inductor 31 according to the embodiment of the present invention. FIG. 4 is an exploded plan view showing the configuration of thespiral inductor 31 according to the embodiment of the present invention. 4A shows thefirst layer 311, FIG. 4B shows thesecond layer 312, FIG. 4C shows thethird layer 313, FIG. 4D shows thefourth layer 314, FIG. (E) shows thefifth layer 315, FIG. 4 (f) shows thesixth layer 316, FIG. 4 (g) shows theseventh layer 317, and FIG. 4 (h) shows theeighth layer 318. . As shown in FIG. 3, thespiral inductor 31 includes eightlayers 311 to 318 and aland electrode 320 formed on one surface of thefirst layer 311. Thefirst layer 311 is anonmagnetic layer 31c made of nonmagnetic ferrite. Thesecond layer 312 is a softmagnetic layer 31a made of a soft magnetic material having a high magnetic permeability (for example, a ferrite-based material such as Ni—Zn—Cu ferrite). Acoil conductor 31b made of a conductive material (for example, Cu) is provided on thethird layer 313, thefourth layer 314, thesixth layer 316, and theseventh layer 317 of the softmagnetic layer 31a made of a soft magnetic material having a high magnetic permeability. Is formed. Acoil conductor 31b made of a conductive material is formed on thefifth layer 315 and theeighth layer 318 of thenonmagnetic layer 31c made of nonmagnetic ferrite.

軟磁性体層31a及び非磁性体層31cに形成されているコイル導体31bは、半径r1の円形の一部を欠いた形状を有し、それぞれの層に形成されたコイル導体31bは、互いに電気的に接続されて一つのコイルを構成している。第三層313及び第八層318に形成されているコイル導体31bには引き出し配線31dが設けられている。第一層311乃至第八層318は、それぞれの層に形成されたコイル導体31bは、中心を通る法線を共有するように積層され、スパイラルインダクタ31を構成している。第三層313のコイル導体31bに設けられた引き出し配線31dが一つのコイルの一端であり一方のランド電極320に接続されている。第八層318に形成されているコイル導体31bに設けられた引き出し配線31dが一つのコイルの他端であり他方のランド電極320に接続されている。なお、図3及び図4で示したスパイラルインダクタ31の構成は例示であり、軟磁性体層31aとコイル導体31bとで構成されたスパイラルインダクタ31であれば、特に限定されない。  Thecoil conductor 31b formed in the softmagnetic layer 31a and thenonmagnetic layer 31c has a shape lacking a part of a circle having a radius r1, and thecoil conductors 31b formed in the respective layers are electrically connected to each other. Are connected to form one coil. Thecoil conductor 31b formed in thethird layer 313 and theeighth layer 318 is provided with alead wiring 31d. In thefirst layer 311 to theeighth layer 318, thecoil conductors 31 b formed in the respective layers are laminated so as to share a normal passing through the center, thereby forming aspiral inductor 31. Alead wire 31 d provided on thecoil conductor 31 b of thethird layer 313 is one end of one coil and is connected to oneland electrode 320. Alead wire 31 d provided on thecoil conductor 31 b formed on theeighth layer 318 is the other end of one coil and is connected to theother land electrode 320. The configuration of thespiral inductor 31 shown in FIGS. 3 and 4 is merely an example, and is not particularly limited as long as thespiral inductor 31 is configured by the softmagnetic layer 31a and thecoil conductor 31b.

また、図3に示すスパイラルインダクタ31は、コイル導体31bが形成されていない軟磁性体層31aの第二層312を備えることで、ランド電極320が形成されている面側から漏れる磁束を、ランド電極320が形成されていない面側から漏れる磁束に比べて小さくすることができる。ランド電極320が形成されていない面側が、充電台2に対向している面側となるので、スパイラルインダクタ31は、充電台2に対向している面側の漏れ磁束が、対向している該面側とは反対の面側の漏れ磁束に比べて大きくしてある。そのため、本発明の実施の形態に係る電力伝送システム1は、スパイラルインダクタ31の、充電台2に対向している面側とは反対の面側からの磁束の漏れを抑えて、充電台2のコイル21との電磁結合に利用される磁束を大きくすることができ、電力を伝送する能力を維持することができる。  Further, thespiral inductor 31 shown in FIG. 3 includes thesecond layer 312 of the softmagnetic layer 31a in which thecoil conductor 31b is not formed, so that the magnetic flux leaking from the surface side on which theland electrode 320 is formed can be reduced. It can be made smaller than the magnetic flux leaking from the surface side where theelectrode 320 is not formed. Since the surface side on which theland electrode 320 is not formed becomes the surface side facing the chargingstand 2, thespiral inductor 31 has the leakage magnetic flux on the surface side facing the chargingstand 2 facing the surface. It is larger than the leakage magnetic flux on the surface side opposite to the surface side. Therefore, the power transmission system 1 according to the embodiment of the present invention suppresses leakage of magnetic flux from the surface side of thespiral inductor 31 opposite to the surface side facing the charging table 2, and The magnetic flux used for electromagnetic coupling with thecoil 21 can be increased, and the ability to transmit electric power can be maintained.

図1に戻って、スパイラルインダクタ31は、充電台2に対向している面側とは反対の面側に、回路基板34を実装するようにしてある。回路基板34は、スパイラルインダクタ31で伝送する電力を制御する複数の電子部品を実装しており、少なくとも整流回路、レギュレータ回路、充電制御回路を構成する電子部品が実装されている。図5は、本発明の実施の形態に係る電力伝送システム1の回路構成の一部を示す回路図である。図5に示す電力伝送システム1では、充電台2のコイル21と携帯電話機3のスパイラルインダクタ31とを電磁結合させて電力を伝送する場合に、スパイラルインダクタ31に接続される回路構成が図示されている。具体的には、整流回路を構成するダイオードD及びコンデンサCが回路基板34に実装され、該回路基板34を、スパイラルインダクタ31の、充電台2に対向している面側とは反対の面側に実装してある。そのため、スパイラルインダクタ31と回路基板34とで構成されるコイルモジュールを小型化して、携帯電話機3を小型化することができる。  Returning to FIG. 1, thespiral inductor 31 is configured such that thecircuit board 34 is mounted on the surface opposite to the surface facing the chargingstand 2. Thecircuit board 34 is mounted with a plurality of electronic components that control the power transmitted by thespiral inductor 31, and at least electronic components that constitute a rectifier circuit, a regulator circuit, and a charge control circuit are mounted. FIG. 5 is a circuit diagram showing a part of the circuit configuration of the power transmission system 1 according to the embodiment of the present invention. In the power transmission system 1 shown in FIG. 5, a circuit configuration connected to thespiral inductor 31 is illustrated when thecoil 21 of the chargingstand 2 and thespiral inductor 31 of themobile phone 3 are electromagnetically coupled to transmit power. Yes. Specifically, the diode D and the capacitor C constituting the rectifier circuit are mounted on thecircuit board 34, and thecircuit board 34 is disposed on the surface side opposite to the surface side of thespiral inductor 31 facing the chargingbase 2. Is implemented. Therefore, it is possible to reduce the size of themobile phone 3 by reducing the size of the coil module including thespiral inductor 31 and thecircuit board 34.

以上のように、本発明の実施の形態に係る電力伝送システム1では、充電台2が、平板状のコイル(第一のコイル)21と、コイル21の内径部分に配置された磁石22とを備え、携帯電話機3が、コイル21の内径と略同じ又は該内径より小さい外径のスパイラルインダクタ(第二のコイル)31を備える。スパイラルインダクタ31がコイル21より小さいため、充電台2のコイル21と携帯電話機3のスパイラルインダクタ31との結合係数は低下するが、コイル21の内径部分に配置された磁石22により、エネルギーの保持と損失との関係を示す指標であるQ値を高くすることができるため、電力を伝送する能力を維持することができる。具体的に、コイル21の外径を4cm、スパイラルインダクタ31のコイル導体31bの外径を1cmとした場合、充電台2から2.5Wの電力を供給すると、携帯電話機3で1Wの電力の供給を受けることができ、本発明の実施の形態に係る電力伝送システム1の電力を伝送する能力(伝送効率)は40%となる。  As described above, in the power transmission system 1 according to the embodiment of the present invention, the chargingstand 2 includes the flat coil (first coil) 21 and themagnet 22 arranged on the inner diameter portion of thecoil 21. Themobile phone 3 includes a spiral inductor (second coil) 31 having an outer diameter that is substantially the same as or smaller than the inner diameter of thecoil 21. Since thespiral inductor 31 is smaller than thecoil 21, the coupling coefficient between thecoil 21 of the chargingstand 2 and thespiral inductor 31 of themobile phone 3 is reduced. However, themagnet 22 disposed on the inner diameter portion of thecoil 21 holds energy. Since the Q value that is an index indicating the relationship with the loss can be increased, the ability to transmit power can be maintained. Specifically, when the outer diameter of thecoil 21 is 4 cm and the outer diameter of thecoil conductor 31b of thespiral inductor 31 is 1 cm, when 2.5 W of power is supplied from the chargingbase 2, themobile phone 3 supplies 1 W of power. The power transmission system 1 according to the embodiment of the present invention can transmit power (transmission efficiency) of 40%.

また、本発明の実施の形態に係る電力伝送システム1では、充電台2のコイル21の内径部分に配置された磁石22と、携帯電話機3のスパイラルインダクタ31の軟磁性体層31aとの間の引き合う力を利用して、充電台2のコイル21と携帯電話機3のスパイラルインダクタ31との位置合わせを容易に行うことができる。さらに、本発明の実施の形態に係る電力伝送システム1では、携帯電話機3のコイルをスパイラルインダクタ31とすることで、携帯電話機3側のコイルを小型化することができる。  Moreover, in the power transmission system 1 according to the embodiment of the present invention, the gap between themagnet 22 disposed on the inner diameter portion of thecoil 21 of the chargingstand 2 and the softmagnetic layer 31 a of thespiral inductor 31 of themobile phone 3 is between. Using the attractive force, thecoil 21 of the chargingstand 2 and thespiral inductor 31 of themobile phone 3 can be easily aligned. Furthermore, in the power transmission system 1 according to the embodiment of the present invention, the coil on themobile phone 3 side can be downsized by using the coil of themobile phone 3 as thespiral inductor 31.

また、本発明の実施の形態に係る充電台2は、軟磁性体層31aとコイル導体31bとで構成されたスパイラルインダクタ31を備える携帯電話機3に対して、電力を供給する充電台である。そして、充電台2は、平板状のコイル21と、該コイル21の内径部分に配置された磁石22とを備える。コイル21の内径は、携帯電話機3のコイル導体31bの外径と略同じ又は該外径より大きいので、充電台2のコイル21と携帯電話機3のコイル導体31bとの結合係数は低下するが、コイル21の内径部分に配置された磁石22により、Q値を高くすることができるため、電力を伝送する能力を維持することができる。  The chargingstand 2 according to the embodiment of the present invention is a charging stand that supplies power to themobile phone 3 that includes thespiral inductor 31 that includes the softmagnetic layer 31a and thecoil conductor 31b. The chargingstand 2 includes aflat coil 21 and amagnet 22 disposed on the inner diameter portion of thecoil 21. Since the inner diameter of thecoil 21 is substantially the same as or larger than the outer diameter of thecoil conductor 31b of themobile phone 3, the coupling coefficient between thecoil 21 of the chargingbase 2 and thecoil conductor 31b of themobile phone 3 decreases. Since the Q value can be increased by themagnet 22 disposed in the inner diameter portion of thecoil 21, the ability to transmit electric power can be maintained.

さらに、本発明の実施の形態に係る携帯電話機3は、平板状のコイル21と、該コイル21の内径部分に配置された磁石22とを備える充電台2から電力の供給を受ける携帯電話機3である。そして、携帯電話機3は、軟磁性体層31aとコイル導体31bとで構成されたスパイラルインダクタ31と、スパイラルインダクタ31と離隔して配置され、二次電池32を収納している電池収納部33とを備えるので、充電台2から電力の供給を受けてスパイラルインダクタ31が発熱しても電池収納部33に熱が伝わりにくく、二次電池32の劣化を抑えることができる。  Furthermore, themobile phone 3 according to the embodiment of the present invention is amobile phone 3 that is supplied with electric power from a chargingstand 2 that includes aflat coil 21 and amagnet 22 disposed on an inner diameter portion of thecoil 21. is there. Themobile phone 3 includes aspiral inductor 31 composed of a softmagnetic layer 31a and acoil conductor 31b, and abattery storage unit 33 that is spaced apart from thespiral inductor 31 and stores asecondary battery 32. Therefore, even when thespiral inductor 31 generates heat upon receiving power supply from the chargingstand 2, it is difficult for heat to be transmitted to thebattery housing portion 33, and deterioration of thesecondary battery 32 can be suppressed.

1 電力伝送システム
2 充電台
3 携帯電話機
4 ACアダプタ
21 コイル
22 磁石
23、34 回路基板
23a 電子部品
23b、23c コネクタ
24 樹脂構造体
31 スパイラルインダクタ
31a 軟磁性体層
31b コイル導体
31c 非磁性体層
31d 引き出し配線
32 二次電池
33 電池収納部
320 ランド電極
DESCRIPTION OF SYMBOLS 1 Electricpower transmission system 2Charging stand 3Mobile phone 4AC adapter 21Coil 22Magnet 23, 34Circuit board23a Electronic component 23b,23c Connector 24Resin structure 31Spiral inductor 31a Softmagnetic layer31b Coil conductor31c Nonmagnetic layer 31d Lead-out wiring 32Secondary battery 33Battery compartment 320 Land electrode

Claims (5)

Translated fromJapanese
電力を供給する給電装置と、電力の供給を受ける受電装置とを備える電力伝送システムにおいて、
前記給電装置は、
平板状の第一のコイルと、
該第一のコイルの内径部分に配置された磁石と
を備え、
前記受電装置は、
前記第一のコイルの内径と略同じ又は該内径より小さい外径の第二のコイルを備え、
該第二のコイルは、軟磁性体層とコイル導体とで構成されたスパイラルインダクタであることを特徴とする電力伝送システム。
In a power transmission system including a power supply device that supplies power and a power receiving device that receives power supply,
The power supply device
A flat first coil;
A magnet disposed on the inner diameter portion of the first coil,
The power receiving device is:
A second coil having an outer diameter substantially the same as or smaller than the inner diameter of the first coil;
The power transmission system, wherein the second coil is a spiral inductor composed of a soft magnetic layer and a coil conductor.
前記スパイラルインダクタは、前記給電装置に対向している面側の漏れ磁束が、対向している該面側とは反対の面側の漏れ磁束より大きくなるようにしてあることを特徴とする請求項1記載の電力伝送システム。  The spiral inductor is configured such that a leakage magnetic flux on a surface facing the power feeding device is larger than a leakage magnetic flux on a surface opposite to the surface facing the spiral inductor. The power transmission system according to 1. 前記スパイラルインダクタは、前記給電装置に対向している面側とは反対の面側に、回路基板を実装するようにしてあることを特徴とする請求項1又は2に記載の電力伝送システム。  3. The power transmission system according to claim 1, wherein the spiral inductor is configured such that a circuit board is mounted on a surface opposite to a surface facing the power feeding device. 軟磁性体層とコイル導体とで構成されたスパイラルインダクタを備える受電装置に対して、電力を供給する給電装置であって、
平板状のコイルと、
該コイルの内径部分に配置された磁石と
を備え、
前記コイルの内径は、前記受電装置の前記コイル導体の外径と略同じ又は該外径より大きいことを特徴とする給電装置。
A power supply device that supplies power to a power receiving device including a spiral inductor composed of a soft magnetic layer and a coil conductor,
A flat coil;
A magnet disposed on the inner diameter portion of the coil,
An inner diameter of the coil is substantially equal to or larger than an outer diameter of the coil conductor of the power receiving apparatus.
平板状のコイルと、
該コイルの内径部分に配置された磁石と
を備える給電装置から電力の供給を受ける携帯機器であって、
軟磁性体層とコイル導体とで構成されたスパイラルインダクタと、
該スパイラルインダクタと離隔して配置され、二次電池を収納している電池収納部と
を備え、
前記コイル導体の外径は、前記給電装置の前記コイルの内径と略同じ又は該内径より小さいことを特徴とする携帯機器。
A flat coil;
A portable device that is supplied with electric power from a power supply device including a magnet disposed on an inner diameter portion of the coil,
A spiral inductor composed of a soft magnetic layer and a coil conductor;
A battery storage section that is spaced apart from the spiral inductor and stores a secondary battery;
The portable device characterized in that an outer diameter of the coil conductor is substantially the same as or smaller than an inner diameter of the coil of the power feeding device.
JP2010145731A2010-06-282010-06-28Power transmission system, and power supply device and portable apparatus thereforPendingJP2012010533A (en)

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