JP4308858B2 - 送電制御装置、受電制御装置、無接点電力伝送システム、送電装置、受電装置および電子機器 - Google Patents
送電制御装置、受電制御装置、無接点電力伝送システム、送電装置、受電装置および電子機器 Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00036—Charger exchanging data with battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
- H02J7/0044—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction specially adapted for holding portable devices containing batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H02J7/00045—Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Description
なお以下に説明する本実施形態は特許請求の範囲に記載された本発明の内容を不当に限定するものではなく、本実施形態で説明される構成の全てが本発明の解決手段として必須であるとは限らない。
まず、本発明が適用される好適な電子機器の例、ならびに、無接点電力伝送技術の原理について説明する。
図1(A),(B)は無接点電力伝送技術について説明するための図であり、(A)は無接点電力伝送手法が適用される電子機器の例を示す図であり、(B)は誘導トランスを用いた無接点電力伝送の原理を説明するための図である。
図1(A)に示されるように、電子機器の1つである充電器500(クレードル)は、送電装置10を有する。また電子機器の1つである携帯電話機510は、受電装置40を有する。また携帯電話機510は、LCDなどの表示部512、ボタン等で構成される操作部514、マイク516(音入力部)、スピーカ518(音出力部)、アンテナ520を有する。
図2は、送電装置、受電装置ならびに負荷からなる無接点電力伝送システムにおける、各部の具体的な構成の一例を示す回路図である。図示されるように、送電装置10には、送電制御装置20と、送電部12が設けられている。また、受電装置40には、受電部42と、負荷変調部46と、給電制御部48とが設けられている。また、負荷90は、充電制御装置92とバッテリ(2次電池)94が含まれる。以下具体的に説明する。
次に、通常送電前の認証動作および最大伝送電力の調整動作について説明する。図4(A)〜(C)は、認証動作および最大伝送電力の調整動作の一例を説明するための図であり、(A)は、認証情報に基づいて最大伝送電力の調整が行われる様子を示す図であり、(B)および(C)は各々、認証情報の具体例を示す図である。
次に、伝送電力の制御の一例について説明する。ここでは、伝送周波数または伝送レベルを変化させて最大伝送電力を制御する方法について説明する。
次に、共振周波数を変化させることによって、伝送周波数を固定したまま伝送電力を増減させる方法について説明する。図9は、共振周波数が異なる複数の共振特性を使い分けることによって、同じ伝送周波数で異なる電力を伝送する態様を示す図である。
以下、送電周波数を変化させることなく伝送電力を制御する機能を、「パワーセーブ送電」に応用することについて説明する。ここで、「パワーセーブ送電」とは、通常送電時よりも低い電力での連続送電である。
図12は、本発明の無接点電力伝送システムの、具体的な動作手順の一例を示すフロー図である。図12において、左側が1次側(受電装置側)の手順を示し、右側が2次側(送電装置側)の手順を示す。
(1)認証処理によって、送電装置側では、受電装置側の情報を取得して送電の可否を判定することができ、かつ、認証情報を用いて最大伝送電力を調整することができ、したがって、一台の送電装置で、広範な多様な受電装置側の機器に対応することが可能となる。
(2)送電装置を受電装置毎に用意する必要がなくなり、1次側機器と2次側機器とを柔軟に組み合わせることが可能となる。
(3)受電装置側の機器に対して過大な電力が伝送されることがないため、受電装置側の機器における安全が確保される。
(4)受電装置側の機器に対して過大な電力が伝送されることがないため、受電装置側の部品の定格(電圧定格や電流定格)を下げることができ、これによって低コスト化を図ることができる。
(5)認証情報(定格電力情報を含む場合、共振特性情報を含む場合、受電側の機器の特定情報を含む場合がある)を有効利用することから、最大伝送電力を決定するための特別な情報を受電装置側から送電装置側に送信する必要がなく、通信処理の簡素化を図ることもできる。
(6)伝送周波数や伝送振幅を変化させる手法を採用することによって、伝送電力を高精度に制御することができる。
(7)LC共振回路の共振特性を変化させることによって、伝送周波数を変化させることなく、伝送電力を増減させることができる。伝送周波数が一定であるため、周波数変更に伴う電磁波の不要輻射ノイズの問題や電波法上の問題等が生じない。
(8)LC共振回路の共振特性を変化させて伝送電力を低減する技術を、パワーセーブ送電に応用することによって、伝送周波数を変化させずにパワーセーブ送電を実現することができる。これによって、伝送周波数の変更に伴う問題(電磁波の不要輻射の問題や電波法上の問題)が生じるおそれなくパワーセーブ送電が実現され、これによって、例えば、2次電池の再充電管理を容易に行うことができる。
(9)1台の送電装置の送電電力を、受電装置側の機器の定格電力に適合するように柔軟に調整可能とすることができ、きわめて広範で多様な電子機器に柔軟に対応できるようになり、かつ、受電装置を搭載した多様な電子機器が、共通の送電側の電子機器を安全に利用できるようになる。
(10)本発明によって、無接点電力伝送システムの利便性が格段に向上する。したがって、無接点電力伝送システムの利用促進を図ることができる。
(11)本発明によって、無接点電力伝送システムを、社会基盤として広く普及させることができる。
3 メーカープロダクトID、4 定格電力情報、5 共振特性情報、10 送電装置、11 ROM 12 送電部、13 可変容量部 14 電圧検出回路、16 表示部、20 送電制御装置、22 送電側制御回路、23 周波数変調部、24 発振回路、
26 ドライバ制御回路、28 波形検出回路、40 受電装置、42 受電部、
43 整流回路、46 負荷変調部、48 給電制御部、50 受電制御装置、
52 受電側制御回路、54 出力保証回路、56 位置検出回路、58 発振回路、
60 周波数検出回路、62 満充電検出回路、90 2次側機器の負荷、
92 充電制御装置(充電制御IC)、94 本負荷としてのバッテリ(2次電池)、
LEDR 電池残量や電池の状態のインジケータとしての発光装置、
C10 共振回路を構成する可変容量、L10 インダクタンス値可変のコイル
Claims (11)
- 1次コイルと2次コイルを電磁的に結合させて送電装置から受電装置に対して電力を伝送し、前記受電装置の本負荷に対して電力を供給する無接点電力伝送システムの前記送電装置に設けられる送電制御装置であって、
前記送電装置を制御する送電側制御回路を含み、
前記送電側制御回路は、
通常送電が開始される前に、前記受電装置から送信される認証情報に基づく認証処理を実行して送電の可否を判定し、送電可能と判定された場合に前記通常送電を行うと共に、
前記認証情報の少なくとも一部に基づいて、前記1次コイルと、前記1次コイルに接続されるコンデンサとを有する共振回路の共振特性を変化させることによって、前記受電装置側の定格電力に適合するように、前記通常送電時の最大伝送電力を制御することを特徴とする送電制御装置。 - 請求項1記載の送電制御装置であって、
前記送電装置は、
前記コンデンサは、容量値が可変のコンデンサであり、
前記送電側制御回路は、容量調整信号によって前記コンデンサの容量値を調整し、これによって前記共振回路の共振特性を変化させ、前記通常送電時の最大伝送電力を制御することを特徴とする送電制御装置。 - 請求項1記載の送電制御装置であって、
前記1次コイルは、そのインダクタンスが可変に調整されるコイルであり、
前記送電側制御回路は、インダクタンス調整信号によって前記インダクタンス可変の1次コイルのインダクタンス値を調整し、これによって前記共振回路の共振特性を変化させ、前記通常送電時の最大伝送電力を制御することを特徴とする送電制御装置。 - 請求項1〜請求項3のいずれかに記載の送電制御装置であって、
前記送電側制御回路は、前記受電装置から、通常送電時よりも伝送電力が低いパワーセーブ送電を要求する信号を受けると、前記共振回路の共振特性を変化させ、送電時の周波数と同じ周波数による前記パワーセーブ送電を実行することを特徴とする送電制御装置。 - 請求項1〜請求項4のいずれかに記載の送電制御装置であって、
前記認証情報には、前記受電装置側の定格電力情報が含まれ、前記送電側制御回路は、前記定格電力情報に基づいて、前記通常送電時の最大伝送電力を制御することを特徴とする送電制御装置。 - 請求項1〜請求項4のいずれかに記載の送電制御装置であって、
前記認証情報には、前記1次コイルを構成要素として含む共振回路の共振特性の情報が含まれることを特徴とする送電制御装置。 - 請求項1〜請求項4のいずれかに記載の送電制御装置であって、
前記認証情報には、前記受電装置側の機器を特定する情報が含まれることを特徴とする送電制御装置。 - 1次コイルと2次コイルを電磁的に結合させて送電装置から受電装置に対して電力を伝送し、前記受電装置の本負荷に対して電力を供給する無接点電力伝送システムであって、
前記受電装置は、
前記送電装置に対して信号を送信するための負荷変調部と、
前記受電装置を制御する受電側制御回路と、を含み、
前記受電側制御回路は、通常送電が開始される前の認証時において、前記負荷変調部の動作を制御し、前記送電装置に対して、前記受電装置に通常送電時の伝送電力を制御させるための情報を含む認証情報を負荷変調によって送信し、
前記送電装置の前記送電側制御回路は、
通常送電が開始される前に、前記受電装置から送信される前記認証情報に基づく認証処理を実行して送電の可否を判定し、送電可能と判定された場合に前記通常送電を開始すると共に、
前記認証情報に含まれる、前記受電装置に通常送電時の伝送電力を制御させるための情報に基づいて、前記1次コイルと、前記1次コイルに接続されるコンデンサとを有する共振回路の共振特性を変化させることによって、前記受電装置側の定格電力に適合するように、前記通常送電時の最大伝送電力を制御する無接点電力伝送システム。 - 請求項8記載の無接点電力伝送システムであって、
前記受電側制御回路は、通常送電時のおける前記本負荷の状態を監視し、前記本負荷が通常送電時の電力伝送を必要としない状態になった場合に、前記送電装置に対して、通常送電時よりも低い電力送電であるパワーセーブ送電を要求する信号を送信し、
前記送電側制御回路は、前記受電装置からの前記パワーセーブ送電を要求する信号を受信すると、前記共振回路の共振特性を変化させ、送電時の周波数と同じ周波数による前記パワーセーブ送電を実行することを特徴とする無接点電力伝送システム。 - 請求項1〜請求項7のいずれかに記載の送電制御装置と、
前記1次コイルを駆動する送電ドライバと、
駆動クロックを生成する駆動クロック生成回路と、
前記駆動クロックに基づいて前記送電ドライバを制御するドライバ制御回路と、
を含むことを特徴とする送電装置。 - 請求項10記載の送電装置を含むことを特徴とする電子機器。
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JP2007036746A JP4308858B2 (ja) | 2007-02-16 | 2007-02-16 | 送電制御装置、受電制御装置、無接点電力伝送システム、送電装置、受電装置および電子機器 |
US12/071,141 US8111041B2 (en) | 2007-02-16 | 2008-02-15 | Power transmission control device, power reception control device, non-contact power transmission system, power transmission device, power reception device, and electronic instrument |
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