JP2010239781A - 無線電力伝送システム、電力受信局装置、および電力送信局装置 - Google Patents
無線電力伝送システム、電力受信局装置、および電力送信局装置 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/08—Closed loop power control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; 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
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; 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—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/40—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data
- H02J7/42—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data with electronic devices having internal batteries, e.g. mobile phones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
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Abstract
【解決手段】無線送電システム(10,20)は、受電アンテナを介して受電した電力の電力レベルを取得する、受電電力測定部(206)と、受電アンテナを介して受電した電力の供給を受けて駆動するデバイス(250)において消費される消費電力の電力レベルを取得する、消費電力測定部(210)と、受電電力測定部により取得した電力レベルと、消費電力測定部により取得した電力レベルとの差分に基づいて、送電アンテナを介して送電する電力の電力レベルを制御する送電制御部(102)と、を含んでいる。
【選択図】図1
Description
前述の一般的な説明および以下の詳細な説明は、典型例および説明のためのものであって、本発明を限定するためのものではない、と理解すべきである。
変化分ΔPt=(消費電力Pd+マージンPm−受信電力Pr)/効率Etr
効率Etr=受信電力Pr/送信電力Pt
この場合、図5のステップ542において、情報端末24の判定部230は、バッテリ276を含むデバイス250の消費電力レベルPd、マージン電力レベルPm、および充放電回路272からの所要の充電電力レベルPcに基づいて、情報端末20における所要の電力レベル(Pd+Pm+Pc)を決定する。次いで、判定部230は、受信電力レベルPr、情報端末20の所要の電力レベル(Pd+Pm+Pc)、無線電力送信機104の送信電力レベルPt、および電力受信効率Etrに基づいて、無線電力送信機104の送信電力レベルPtの所要の変化または増減を判定する。次いで、判定部230は、その決定された変化分ΔPtの値を判定結果として送受信機260に供給する。
この場合、図6のステップ602において、判定部230は、無線電力送信機104の送信電力レベルPtの変化分または増減分ΔPtを次の式で求める。
変化分ΔPt=(消費電力Pd+マージンPm+充電電力Pc−受信電力Pr)/効率Etr
効率Etr=受信電力Pr/送信電力Pt
この場合、図8のステップ543において、情報端末26の送受信機260は、受信電力測定器206から受信電力レベルPr、消費電力測定器210から消費電力レベルPd、マージン決定部220からマージン電力レベルPmを受け取り、充放電回路272から所要の充電電力レベルPcを受け取り、それらの情報を送信情報として決定する。
20、22、24、26 情報端末
102 制御部
104 無線電力送信機
106 メモリ
180 電源
160 送受信機
202 制御部
204 無線電力受信機
206 受信電力測定器
208 電力変換器
210 消費電力測定器
220 マージン決定部
230 判定部
250 複数のデバイス
260 送受信機
Claims (5)
- 無線方式により送電アンテナから受電アンテナに電力を送電する無線送電システムであって、
前記受電アンテナを介して受電した電力の電力レベルを取得する、受電電力測定部と、
前記受電アンテナを介して受電した電力の供給を受けて駆動するデバイスにおいて消費される消費電力の電力レベルを取得する、消費電力測定部と、
前記受電電力測定部により取得した電力レベルと、前記消費電力測定部により取得した電力レベルとの差分に基づいて、前記送電アンテナを介して送電する電力の電力レベルを制御する送電制御部と、
を有する無線送電システム。 - さらに、前記消費電力測定部により取得した電力レベルから、前記受電電力測定部により取得した電力レベルを減算することにより前記差分を取得する差分取得部を有し、
前記送電制御部は、前記差分取得部により取得された差分が所定の閾値を超える場合に、前記送電アンテナを介して送電する電力の電力レベルを増加させる、
ことを特徴とする、請求項1に記載の無線送電システム。 - 前記デバイスの所定の動作状態ごとに消費電力の変動分を示すマージン電力の電力レベルを記憶させるマージン記憶部と、
前記デバイスの動作状態を取得する動作状態取得部と、
前記動作状態取得部により取得された動作状態に対応するマージン電力の電力レベルを前記マージン記憶部から取得するマージン取得部と、
を有し、
前記差分取得部は、前記マージン取得部により取得されたマージン電力の電力レベルを前記消費電力測定部により取得した電力レベルに加算して得た合計電力レベルから、前記受電電力測定部により取得した電力レベルを減算することにより前記差分を取得する、
ことを特徴とする、請求項2に記載の無線送電システム。 - 電力送信機の送電アンテナから無線方式により送電される電力を受電アンテナで受電する無線電力受電装置であって、
前記受電アンテナを介して受電した電力の電力レベルを取得する、受電電力測定部と、
前記受電アンテナを介して受電した電力の供給を受けて駆動するデバイスにおいて消費される消費電力の電力レベルを取得する、消費電力測定部と、
前記受電電力測定部により取得した電力レベルと、前記消費電力測定部により取得した電力レベルとの差分に基づいて、前記送電アンテナを介して送電する電力の電力レベルを制御する制御信号を生成する制御信号生成部と、
前記制御信号生成部により生成された前記制御信号を、無線送電用の周波数帯域とは異なる周波数帯域を用いて前記電力送信機へ送信する、制御信号送信部と、
を有する無線電力受電装置。 - 無線方式により送電アンテナから受電アンテナへ電力を送電する電力送信機であって、
無線送電用の周波数帯域とは異なる周波数帯域を用いて、前記受電アンテナを有する無線電力受電装置からRF信号を受信する受信部と、
前記受信部を用いて、前記無線電力受電装置における受電電力の電力レベルを取得する、受電電力取得部と、
前記受信部を用いて、前記無線電力受電装置における受電電力の供給を受けて駆動するデバイスの消費電力の電力レベルを取得する消費電力取得部と、
前記受電電力取得部により取得した電力レベルと、前記消費電力取得部により取得した電力レベルとの差分に基づいて、前記送電アンテナを介して送電する電力の電力レベルを制御する、送電制御部と、
を有する電力送信機。
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| Application Number | Priority Date | Filing Date | Title |
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| JP2009085326A JP5556044B2 (ja) | 2009-03-31 | 2009-03-31 | 無線送電システム、無線電力受電装置、および無線電力送電装置 |
| US12/749,670 US8786134B2 (en) | 2009-03-31 | 2010-03-30 | Wireless power transmitting system, power receiving station, power transmitting station, and recording medium |
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| JP2009085326A JP5556044B2 (ja) | 2009-03-31 | 2009-03-31 | 無線送電システム、無線電力受電装置、および無線電力送電装置 |
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| JP5556044B2 JP5556044B2 (ja) | 2014-07-23 |
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| JP2013250864A (ja) * | 2012-06-01 | 2013-12-12 | Toshiba Corp | 送電装置、受電装置および送受電システム |
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| US8786134B2 (en) | 2014-07-22 |
| US20100264746A1 (en) | 2010-10-21 |
| JP5556044B2 (ja) | 2014-07-23 |
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