JP2008125142A - Radio power supply terminal - Google Patents
Radio power supply terminal Download PDFInfo
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- JP2008125142A JP2008125142A JP2005139015A JP2005139015A JP2008125142A JP 2008125142 A JP2008125142 A JP 2008125142A JP 2005139015 A JP2005139015 A JP 2005139015A JP 2005139015 A JP2005139015 A JP 2005139015A JP 2008125142 A JP2008125142 A JP 2008125142A
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- power supply
- supply terminal
- wireless power
- power
- elf
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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
Abstract
Description
本発明は、電磁波を利用した無線による電力供給の方法に関する。The present invention relates to a wireless power supply method using electromagnetic waves.
ＲＦＩＤを代表として遠隔通信を行なう媒体では、無線による電力供給は従来から行なわれているが、周波数特性に起因する人体影響が原因となり満足な電源供給を行なえていない。しかし、電子回路を使用する上で電力供給は欠かせない条件である。電力を必要とする機能重視の媒体などでは電池を実装し電源供給を行なっているのが現状である。またＲＦＩＤではないが無線通信を行なう媒体でありながら電源コードの接続により電源供給を行なうものも少なからず存在する。無線通信を行なう媒体において電源コードが存在することは無線の価値を著しく損なうこととなるのは言うまでもない。
すなわち、現在の技術では機能的に制限し無線電力を使用するか、物理的な電源供給手段を採用して機能を優先するかが常に問われることとなっている。
一例を挙げると１３．５６ＭＨｚ帯を使用するパッシブ型のＲＦＩＤである。電波特性としては電磁結合の限界点であるλ／２Πの距離は約３．５ｍとなり、これは周波数特性に起因する電磁結合の限界距離である。つまり同じ方法で１３．５６ＭＨｚ帯を使用する限り約３．５ｍを超えて通信することは不可能であることを意味する。そして電波障害などの影響を考慮し送信電力を制限した結果、同帯域で現実の媒体では約１ｍ程度の通信距離しか持てないのである。In a medium for performing remote communication represented by RFID, power supply by radio has been conventionally performed, but satisfactory power supply cannot be performed due to the influence of the human body due to frequency characteristics. However, power supply is an indispensable condition for using electronic circuits. In a function-oriented medium that requires power, a battery is mounted and power is supplied. In addition, there are many types of media that perform wireless communication, although not RFID, that supply power by connecting a power cord. Needless to say, the presence of the power cord in a medium for performing wireless communication significantly impairs the value of wireless communication.
In other words, in the current technology, there is always a question as to whether functionally limiting and using wireless power, or adopting a physical power supply means to prioritize functions.
An example is a passive RFID that uses the 13.56 MHz band. As a radio wave characteristic, the distance of λ / 2Π which is a limit point of electromagnetic coupling is about 3.5 m, which is a limit distance of electromagnetic coupling caused by frequency characteristics. In other words, as long as the 13.56 MHz band is used in the same manner, it means that it is impossible to communicate over about 3.5 m. As a result of limiting the transmission power in consideration of the influence of radio interference and the like, the actual medium in the same band can only have a communication distance of about 1 m.
また電源供給手段を採用することにより、製造費および保守費用などに負担が掛かることとなる。このためＲＦＩＤでは、物流システムへの応用に無限の可能性があるのにも関わらず、実際の使用には至らないことが多々見受けられる。
このように低コストで利便性を上げる方法として無線電力供給は重要な意味を持つのである。In addition, the use of the power supply means places a burden on manufacturing costs and maintenance costs. For this reason, it is often seen that RFID is not actually used in spite of its infinite possibilities for application to a logistics system.
Thus, wireless power supply has an important meaning as a method for improving convenience at a low cost.
ＥＬＦ若しくはＶＬＦ帯域を使用することにより、従来にない電力を長距離に渡って供給することを本発明の課題とする。An object of the present invention is to supply unprecedented power over a long distance by using the ELF or VLF band.
ＥＬＦ若しくはＶＬＦ等の長波を利用して磁界による誘導結合を持って電力を供給することを特徴とする無線電力供給ターミナル。A wireless power supply terminal which supplies power with inductive coupling by a magnetic field using a long wave such as ELF or VLF.
共振周波数を水晶発振器等から無線電波に必要な共振周波数を得ることを特徴とする。The resonance frequency is obtained from a crystal oscillator or the like for a radio wave.
ＡＣコンセント等の電力元に予め必要な周波数成分を混入することにより無線電波に必要な共振周波数を得ることを特徴とする。A resonance frequency required for radio waves is obtained by mixing a required frequency component in advance in a power source such as an AC outlet.
本発明により、従来から行なわれている無線電力供給よりも大きな電力を供給することが可能となる。また無線電力の増大は現在よりも遠距離にて電力供給を行なうことが可能となる。このことは通信についても同様の効果が期待できるものである。According to the present invention, it is possible to supply larger electric power than the conventional wireless power supply. In addition, an increase in wireless power makes it possible to supply power at a longer distance than at present. The same effect can be expected for communication.
しかも、高周波帯域のように人体と共振することによる悪影響が回避できるものである。これは長波帯の波長が数キロメートルから数十キロメートルと極端に長くなるために人体との共振が物理的にあり得ないからである。Moreover, adverse effects caused by resonating with the human body, such as in a high frequency band, can be avoided. This is because the wavelength of the long wave band becomes extremely long, from several kilometers to several tens of kilometers, so that there is no physical resonance with the human body.
本発明の無線電力供給ターミナルは、ＥＬＦ若しくはＶＬＦ帯域を利用し誘導性の電磁結合により電力を供給するものである。The wireless power supply terminal of the present invention supplies power by inductive electromagnetic coupling using the ELF or VLF band.
以下、図１を参照して本発明の一実施例を詳細に説明する。
交流電源４をＡＣコンセント若しくは配電設備などに接続し得るものとする。日本国内で言えば一般的なＡＣ１００Ｖである。尚、交流電源４については装置内で直流変換し電子回路への電源として利用することも考えられる。Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG.
It is assumed that the AC power source 4 can be connected to an AC outlet or a distribution facility. If it says in Japan, it is common AC100V. Note that the AC power supply 4 may be used as a power source for electronic circuits after DC conversion in the apparatus.
共振周波数抽出回路２により交流電源４から出力用共振回路１に必要な発振周波数の信号を抽出する。この発振周波数を混入および抽出する点においては電力線通信技術に同様のものである。但し、このことは本発明の解決する課題とは直接関与せず、あくまでも周辺技術の一つである。A resonance frequency extraction circuit 2 extracts a signal having an oscillation frequency necessary for the output resonance circuit 1 from the AC power supply 4. This is the same as the power line communication technology in that the oscillation frequency is mixed and extracted. However, this is not directly related to the problem to be solved by the present invention, and is only one of peripheral technologies.
共振周波数抽出回路２から得た信号によりトランジスタ３を介して出力用共振回路１伝達する。出力用共振回路１により電磁波を発生する。無線電力供給ターミナル近傍界内にある電力受給デバイスは誘導結合により電力を得る。
尚、ここで言う電力受給デバイスとは無線電力供給ターミナルと同じ共振周波数による電力受信機能を持つものとする。The output resonance circuit 1 is transmitted through the
The power receiving device referred to here is assumed to have a power receiving function with the same resonance frequency as the wireless power supply terminal.
図１に対して図２は交流電源４を経由して共振周波数の信号を受け取る方式ではなく、水晶発振器７などの発振回路を実装し出力電磁波の発振源とするものである。
この方法では電力通信技術などのように配電設備を改造する事無く電力供給用の電磁波を出力することが可能となる。In contrast to FIG. 1, FIG. 2 is not a method of receiving a signal having a resonance frequency via an AC power supply 4, but an oscillation circuit such as a crystal oscillator 7 is mounted as an oscillation source of an output electromagnetic wave.
In this method, it is possible to output electromagnetic waves for power supply without modifying the distribution facility as in power communication technology.
本発明の無線電力供給ターミナルでは、特に電磁波を使用する上で周波数帯域を限定するものではないが、到達距離および人体への影響度においてＥＬＦ／ＶＬＦなどの長波帯域を優位なものと考えて使用する。In the wireless power supply terminal of the present invention, the frequency band is not particularly limited when using electromagnetic waves, but the long wave band such as ELF / VLF is considered to be superior in the reach and the influence on the human body. To do.
一例として任意の周波数における１ｍおよび１０ｍ地点での磁界強度を下記に試算する。計算式および各設定値を下記に記述する。
磁界強度Ｈ＝Ｉ・Ｎ・Ｒ＾２／２√（Ｒ＾２＋ｘ＾２）＾３
Ｉ＝電流、Ｎ＝コイルの巻数、Ｒ＝コイル半径、ｘ＝コイル中心からの距離
Ｉ＝１０Ａ，Ｎ＝１００、Ｒ＝１０ｍｍ，ｘ＝１ｍ
１０＊１００＊（１０＊１０＾−３）／２√（（１０＊１０＾−３）＾２＋１＾２）＾３＝５ｍ
上記結果より、１ｍ地点では５ｍＡ／ｍの磁界強度が得られる。また１０ｍ地点では距離の１０倍に対して反比例し６０ｄＢの減少を招くことから５ｕＡ／ｍとなる。As an example, the magnetic field strength at 1 m and 10 m points at an arbitrary frequency is estimated below. The calculation formula and each set value are described below.
Magnetic field strength H = I · N · R ^ 2 / 2√ (R ^ 2 + x ^ 2) ^ 3
I = current, N = number of coil turns, R = coil radius, x = distance from coil center I = 10 A, N = 100, R = 10 mm, x = 1 m
10 * 100 * (10 * 10 ^ -3) / 2√ ((10 * 10 ^ -3) ^ 2 + 1 ^ 2) ^ 3 = 5 m
From the above results, a magnetic field strength of 5 mA / m can be obtained at 1 m. Further, at the 10 m point, it is inversely proportional to 10 times the distance and causes a reduction of 60 dB, so that it is 5 uA / m.
本発明により、容易に無線電力の供給ターミナルを設置することが可能となる。
図１を見ても解るとおり本発明の構造は非常に単純な構造で実現が可能であり、このことから小型化が可能なことが容易に推測できる。
また、１３．５６ＭＨｚ帯域と比較して人体への影響が少なく長距離の電力供給が実現できる。さらに本発明の実現により通信と電力供給の方法を個別に実現することが可能となる。すなわち、周波数帯域に依存せず無線電力を供給することが容易に実現できる。According to the present invention, a wireless power supply terminal can be easily installed.
As can be seen from FIG. 1, the structure of the present invention can be realized with a very simple structure. From this, it can be easily estimated that the size can be reduced.
In addition, compared to the 13.56 MHz band, there is less influence on the human body and long-distance power supply can be realized. Furthermore, by realizing the present invention, it is possible to individually implement communication and power supply methods. That is, it is possible to easily supply wireless power without depending on the frequency band.
１ 出力用共振回路
２ 共振周波数抽出回路
３ トランジスタ
４ 交流電源
５ バッファ
６ 水晶発振器DESCRIPTION OF SYMBOLS 1 Output resonance circuit 2 Resonance
Claims (4)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005139015A JP2008125142A (en) | 2005-04-11 | 2005-04-11 | Radio power supply terminal |
| PCT/JP2005/007734 WO2006109360A1 (en) | 2005-04-11 | 2005-04-15 | Radio power supply terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005139015A JP2008125142A (en) | 2005-04-11 | 2005-04-11 | Radio power supply terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2008125142A true JP2008125142A (en) | 2008-05-29 |
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ID=35106905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005139015A Pending JP2008125142A (en) | 2005-04-11 | 2005-04-11 | Radio power supply terminal |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2008125142A (en) |
| WO (1) | WO2006109360A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8611111B2 (en) | 2009-12-14 | 2013-12-17 | Samsung Electronics Co., Ltd. | Resonance power generator |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2805332A (en) * | 1955-01-20 | 1957-09-03 | Gustave Miller | Subminiature portable crystal radio receiver |
| US3061786A (en) * | 1960-01-27 | 1962-10-30 | Rca Corp | Signal translating circuit |
| JPH0933645A (en) * | 1995-07-21 | 1997-02-07 | Oki Electric Ind Co Ltd | Power supply circuit of transponder |
| SG54559A1 (en) * | 1996-09-13 | 1998-11-16 | Hitachi Ltd | Power transmission system ic card and information communication system using ic card |
| DE10029147A1 (en) * | 2000-06-14 | 2001-12-20 | Ulf Tiemens | Installation for supplying toys with electrical energy, preferably for production of light, comprises a sender of electromagnetic waves which is located at a small distance above a play area with the toys |
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2005
- 2005-04-11 JP JP2005139015A patent/JP2008125142A/en active Pending
- 2005-04-15 WO PCT/JP2005/007734 patent/WO2006109360A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8611111B2 (en) | 2009-12-14 | 2013-12-17 | Samsung Electronics Co., Ltd. | Resonance power generator |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006109360A1 (en) | 2006-10-19 |
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