JP2009218798A - Ac adaptor for plc and power supply device, and communication device - Google Patents

Ac adaptor for plc and power supply device, and communication device Download PDF

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JP2009218798A
JP2009218798A JP2008059621A JP2008059621A JP2009218798A JP 2009218798 A JP2009218798 A JP 2009218798A JP 2008059621 A JP2008059621 A JP 2008059621A JP 2008059621 A JP2008059621 A JP 2008059621A JP 2009218798 A JP2009218798 A JP 2009218798A
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mhz
adapter
power supply
plc
input impedance
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Naohiko Yoshizumi
直彦 吉住
Hirotaka Yamamoto
博隆 山本
Yoichi Nakajima
洋一 中島
Eiji Yoshida
栄二 吉田
Takashi Tamura
高志 田村
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Mitsumi Electric Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/121—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using the power network as support for the transmission
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

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  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an AC adaptor for high-speed power line communication (PLC) which can establish appropriate communication in an frequency band of 2 MHz to 30 MHz, and to provide a power supply device and a communication device. <P>SOLUTION: In the power supply device wherein an AC-DC convertor such as an AC adaptor is built in and the communication device provided with the power supply device and a PLC communication module, a normal mode coil or a common mode coil, or a filter 13 comprised of their combination is interposed between an input terminal (plug 11) connected with an outlet of AC power supply and a rectification circuit (diode bridge 12), resulting in an input impedance of 600 Ω or larger, preferably 700 Ω or larger, more preferably 900 Ω. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、ＰＬＣ(高速電力線通信)用のフィルタに関し、例えばＰＬＣ用フィルタルを有し交流電圧を直流電圧に変換して出力するＡＣアダプタや交流電源のコンセントとパーソナルコンピュータ等との間に接続されてＰＬＣ通信を可能にするＰＬＣモジュールを内蔵したＰＬＣアダプタのような通信装置に適用して有効な技術に関する。   The present invention relates to a filter for PLC (high-speed power line communication), and is connected between, for example, an AC adapter that has a PLC filter and converts an AC voltage into a DC voltage and outputs an AC power supply and a personal computer. The present invention relates to a technology effective when applied to a communication apparatus such as a PLC adapter having a PLC module that enables PLC communication.

電力線を通信回線として利用するＰＬＣ通信では、電力を供給する電力線に高周波の信号を重畳して通信を行うが、電力線間には様々なインピーダンスの機器が接続される。   In PLC communication using a power line as a communication line, communication is performed by superimposing a high-frequency signal on a power line that supplies power, and devices of various impedances are connected between the power lines.

この為、インピーダンスが低い機器が接続されると高周波の信号が減少して通信を行う事が困難となる場合がある。   For this reason, when a device having a low impedance is connected, a high-frequency signal may be reduced and it may be difficult to perform communication.

ＰＬＣ通信の使用周波数帯域は２ＭＨｚ〜３０ＭＨｚであるが、従来のＡＣアダプタのインピーダンスを測定して見ると、周波数帯域２ＭＨｚ〜３０ＭＨｚの間のミニマム値が４００Ωと低い値であった。   The frequency band used for PLC communication is 2 MHz to 30 MHz, but when the impedance of the conventional AC adapter is measured, the minimum value between the frequency bands 2 MHz to 30 MHz is a low value of 400Ω.

また、ＰＬＣ通信の使用周波数帯域でのインピーダンスの変動が大きい場合にもＰＬＣ通信に悪い影響を及ぼす恐れがあるので、インピーダンスが大きく且つ使用周波数帯域での変動が小さい方が、良好なＰＬＣ通信を行いやすいと考えられる。   In addition, even if the fluctuation of the impedance in the use frequency band of the PLC communication is large, there is a possibility that the PLC communication may be adversely affected. Therefore, when the impedance is large and the fluctuation in the use frequency band is small, a good PLC communication is performed. It is considered easy to do.

また、従来ＡＣアダプタに内蔵されるＤＣ−ＤＣコンバータとしてスイッチングレギュレータを使用した場合、電力線に不要なノイズを載せないようにする為にラインフィルタを内蔵しているものがある。このラインフィルタを内蔵したＡＣアダプタにおいて、ラインフィルタのコイルのインダクタンスの値およびコンデンサの容量値を決定する方法に関する発明も提案されている（例えば特許文献１）。
特開平１−１８１３１０号公報 In addition, when a switching regulator is used as a DC-DC converter built in a conventional AC adapter, some have a built-in line filter so as not to put unnecessary noise on the power line. An invention relating to a method of determining the inductance value of the coil of the line filter and the capacitance value of the capacitor in the AC adapter incorporating the line filter has also been proposed (for example, Patent Document 1).
Japanese Patent Laid-Open No. 1-181310

ＰＬＣ通信では、２ＭＨｚ〜３０ＭＨｚの周波数帯が使用される。本発明者らは、ＡＣアダプタを介したＰＬＣ通信を可能な製品を開発するため、ＡＣアダプタを介して２ＭＨｚ〜３０ＭＨｚの周波数の信号を電力線に載せて送信する実験を行なった。その結果、２ＭＨｚ近傍の低い周波数では比較的良好な通信結果が得られる場合にも、３０ＭＨｚのような高い周波数で通信を行うと受信側でうまく信号を拾うことができず、良好な通信ができないことがあることが明らかとなった。   In PLC communication, a frequency band of 2 MHz to 30 MHz is used. In order to develop a product capable of PLC communication via an AC adapter, the present inventors conducted an experiment of transmitting a signal having a frequency of 2 MHz to 30 MHz on a power line via the AC adapter. As a result, even when a relatively good communication result is obtained at a low frequency in the vicinity of 2 MHz, if communication is performed at a high frequency such as 30 MHz, a signal cannot be picked up well on the receiving side, and good communication cannot be performed. It became clear that there was something.

この発明は上記のような課題に着目してなされたもので、その目的とするところは、２ＭＨｚ〜３０ＭＨｚの周波数帯において良好な通信を行えるＰＬＣ対応のＡＣアダプタおよび電源装置並びに通信装置を提供できるようにすることにある。   The present invention has been made paying attention to the above-described problems, and the object of the present invention is to provide a PLC-compatible AC adapter, a power supply device, and a communication device that can perform good communication in a frequency band of 2 MHz to 30 MHz. There is in doing so.

本発明者らは、ＡＣアダプタを介したＰＬＣ通信において、低い周波数では通信が可能でも高い周波数で通信を行うと良好な通信ができない原因を調べる過程で、図６に示すようなラインフィルタを持たない通常のＡＣアダプタの入力部についてその入力インピーダンスを測定してみた。その結果、通常のＡＣアダプタの入力インピーダンスは、図７に示すように、周波数が高くなるほど入力インピーダンスが低下しており、例えば３０ＭＨｚでは４００Ω程度に下っていることが分かった。   The present inventors have a line filter as shown in FIG. 6 in the process of investigating the cause of poor communication if communication is performed at a high frequency even if communication is possible at a low frequency in PLC communication via an AC adapter. I tried to measure the input impedance of the input part of a normal AC adapter. As a result, it was found that the input impedance of a normal AC adapter decreases as the frequency increases, as shown in FIG. 7, for example, it drops to about 400Ω at 30 MHz.

そこで、ＡＣアダプタの入力インピーダンスを代えてＰＬＣ通信を行なってみた。その結果、通常のＡＣアダプタは入力インピーダンスが低過ぎるため通信が劣化しており、ＡＣアダプタの入力インピーダンスを適正に設定することによって良好なＰＬＣ通信が可能になるとの結論に達した。   Therefore, PLC communication was performed by changing the input impedance of the AC adapter. As a result, it has been concluded that communication is deteriorated because the input impedance of a normal AC adapter is too low, and that good PLC communication is possible by setting the input impedance of the AC adapter appropriately.

本発明は、上記のような知見に基いてなされたもので、ＡＣアダプタのようなＡＣ−ＤＣコンバータを内蔵した電源装置さらにはかかる電源装置およびＰＬＣ通信モジュールを備えた通信装置において、交流電源のコンセントに接続される入力端子（プラグ）と整流回路（ダイオードブリッジ）との間にフィルタを介在させて、入力インピーダンスが６００Ω以上となるように構成したものである。ここで、前記フィルタは、ノーマルモードコイルもしくはコモンモードコイルあるいはそれらの組み合わせからなるものが好適である。   The present invention has been made on the basis of the above knowledge, and in a power supply device incorporating an AC-DC converter such as an AC adapter, and in a communication device equipped with such a power supply device and a PLC communication module, the AC power supply A filter is interposed between the input terminal (plug) connected to the outlet and the rectifier circuit (diode bridge) so that the input impedance is 600Ω or more. Here, the filter is preferably a normal mode coil, a common mode coil, or a combination thereof.

上記した手段によれば、入力インピーダンスが適正な範囲に設定されることによって良好なＰＬＣ通信が可能になる。   According to the above-described means, good PLC communication is possible by setting the input impedance in an appropriate range.

また、望ましくは入力インピーダンスが７００Ω以上、さらに望ましくは９００Ω以上となるように構成する。これにより、さらに良好なＰＬＣ通信を可能にすることができるようになる。   Further, the input impedance is preferably 700Ω or more, more preferably 900Ω or more. As a result, even better PLC communication can be made possible.

なお、上記構成は、通常のＡＣアダプタはもちろんのことＡＣ−ＤＣコンバータとＰＬＣ通信機能を有するＰＬＣ通信モジュールとを内蔵したＡＣアダプタ、あるいはＡＣアダプタ以外のＡＣ−ＤＣコンバータを内蔵した電源装置、ＡＣ−ＤＣコンバータとＰＬＣ通信モジュールとを内蔵した通信装置にも適用することができる。   In addition, the above-mentioned configuration is not only a normal AC adapter but also an AC adapter incorporating an AC-DC converter and a PLC communication module having a PLC communication function, or a power supply device incorporating an AC-DC converter other than the AC adapter, AC -It is applicable also to the communication apparatus which incorporated DC converter and PLC communication module.

本発明に従うと、２ＭＨｚ〜３０ＭＨｚの周波数帯において良好な通信を行えるＰＬＣ対応のＡＣアダプタおよび電源装置並びに通信装置を実現できるという効果がある。   According to the present invention, there is an effect that it is possible to realize a PLC-compatible AC adapter, a power supply device, and a communication device that can perform good communication in a frequency band of 2 MHz to 30 MHz.

以下、本発明の好適な実施形態を図面に基づいて説明する。なお、以下では、本発明を適用して有効な電源装置の一例としてＡＣアダプタに適用した例を説明するが、本発明を適用可能な電源装置はこれに限定されるものではない。
＜実施形態＞
図１は、本発明の一実施形態のＡＣアダプタを示す回路構成図である。 Preferred embodiments of the present invention will be described below with reference to the drawings. In the following, an example in which the present invention is applied to an AC adapter will be described as an example of an effective power supply device, but the power supply device to which the present invention is applicable is not limited to this.
<Embodiment>
FIG. 1 is a circuit configuration diagram showing an AC adapter according to an embodiment of the present invention.

この実施形態のＡＣアダプタ１０は、交流電圧入力端子としてのプラグ１１に接続され交流電圧（ＡＣ）を整流し直流電圧に変換するダイオード・ブリッジ回路１２および平滑用コンデンサＣ１と、プラグ１１とダイオード・ブリッジ回路１２との間に介在されたフィルタ１３と、電圧変換用のトランスおよび該トランスの一次側コイル流れる電流を制御するスイッチング・トランジスタ、該スイッチング・トランジスタを駆動するスイッチング制御回路などからなるＤＣ−ＤＣコンバータ１４とを有する。ダイオード・ブリッジ回路１２とＤＣ−ＤＣコンバータ１４とによってＡＣ-ＤＣコンバータが構成される。   The AC adapter 10 of this embodiment is connected to a plug 11 serving as an AC voltage input terminal, rectifies an AC voltage (AC) and converts it into a DC voltage, a smoothing capacitor C1, a plug 11 and a diode. DC− comprising a filter 13 interposed between the bridge circuit 12, a voltage conversion transformer, a switching transistor for controlling a current flowing through the primary coil of the transformer, a switching control circuit for driving the switching transistor, and the like. And a DC converter 14. The diode bridge circuit 12 and the DC-DC converter 14 constitute an AC-DC converter.

なお、図１において、Ｆは過電流からデバイスを保護するヒューズ、Ｔ１，Ｔ２はＰＬＣ通信信号が入出力される信号端子であり、この信号端子Ｔ１，Ｔ２には、例えば直流遮断用の容量素子やトランスなどを介してＰＬＣ通信機能を有するモジュール（いわゆるＰＬＣ通信モジュール）が接続される。図１にはＰＬＣ通信モジュールが示されていないが、ＰＬＣ通信モジュールを含んでＡＣアダプタとして構成しても良い。本明細書においては、表面や内部にプリント配線が施されたセラミック基板のような絶縁基板に複数の半導体チップやディスクリートの電子部品が実装されて上記プリント配線やボンディングワイヤで各部品が所定の役割を果たすように結合されることであたかも一つの電子部品として扱えるように構成されたものをモジュールと称する。   In FIG. 1, F is a fuse for protecting the device from overcurrent, and T1 and T2 are signal terminals for inputting and outputting PLC communication signals. The signal terminals T1 and T2 include, for example, a capacitive element for DC interruption. A module having a PLC communication function (so-called PLC communication module) is connected via a transformer or the like. Although the PLC communication module is not shown in FIG. 1, it may be configured as an AC adapter including the PLC communication module. In the present specification, a plurality of semiconductor chips and discrete electronic components are mounted on an insulating substrate such as a ceramic substrate having printed wiring on the surface or inside, and each component has a predetermined role in the printed wiring or bonding wire. A module that can be handled as one electronic component is called a module.

この実施形態におけるフィルタ１３は、プラグ１１とダイオード・ブリッジ回路１２を接続する一方の電源ラインＬ１上に設けられたノーマルモードコイルＣＬ１と、２つの電源ラインＬ１，Ｌ２の途中に設けられたコモンモードコイルＣＬ２とから構成されている。フィルタ１３は図１のような構成のものに限定されず、例えば図２（Ａ）のようにノーマルモードコイルＣＬ１のみからなるもの、図２（Ｂ）のようにコモンモードコイルＣＬ２のみからなるもの、図２（Ｃ）のように巻き数が異なるアンバランス巻きコイルＣＬ３からなるものであってもよい。   The filter 13 in this embodiment includes a normal mode coil CL1 provided on one power supply line L1 connecting the plug 11 and the diode bridge circuit 12, and a common mode provided in the middle of the two power supply lines L1 and L2. Coil CL2 is comprised. The filter 13 is not limited to that having the configuration shown in FIG. 1, but includes only the normal mode coil CL1 as shown in FIG. 2A, for example, and only the common mode coil CL2 as shown in FIG. 2B. As shown in FIG. 2C, the coil may be composed of unbalanced winding coils CL3 having different numbers of turns.

図３（Ａ），（Ｂ）には、図１の構成のＡＣアダプタにおいて、ノーマルモードコイルＣＬ１のインピーダンスやコモンモードコイルＣＬ２の巻き数の異なるフィルタを使用して周波数を変化させ入力インピーダンスを測定した結果を示す。このうち、図３（Ａ）はコモンモードコイルＣＬ２のみを設けた場合のもの、図３（Ｂ）はノーマルモードコイルＣＬ１とコモンモードコイルＣＬ２を設けた場合のものである。   3 (A) and 3 (B) show the input impedance of the AC adapter configured as shown in FIG. 1 by changing the frequency by using different filters with different impedances of the normal mode coil CL1 and the common mode coil CL2. The results are shown. 3A shows a case where only the common mode coil CL2 is provided, and FIG. 3B shows a case where the normal mode coil CL1 and the common mode coil CL2 are provided.

図３を参照すると、本実施形態を適用したＡＣアダプタでは、周波数が２ＭＨｚのとき入力インピーダンスは１．３ｋΩと２３．１ｋΩ、また周波数が３０ＭＨｚのとき入力インピーダンスは１．４ｋΩと２．２ｋΩであり、図７に示す従来のＡＣアダプタに比べて２ＭＨｚ〜３０ＭＨｚの範囲で入力インピーダンスが高く、変動量も小さいことが分かる。   Referring to FIG. 3, in the AC adapter to which this embodiment is applied, the input impedance is 1.3 kΩ and 23.1 kΩ when the frequency is 2 MHz, and the input impedance is 1.4 kΩ and 2.2 kΩ when the frequency is 30 MHz. 7 shows that the input impedance is high and the fluctuation amount is small in the range of 2 MHz to 30 MHz as compared with the conventional AC adapter shown in FIG.

また、このような入力インピーダンスを有するフィルタ内蔵のＡＣアダプタを使用したＰＬＣ通信実験を行なったところ、データの転送率は９８〜１００％であり、良好なＰＬＣ通信が可能であることが確認された。本発明者らは、さらにノーマルモードコイルＣＬ１のインピーダンスやコモンモードコイルＣＬ２の巻き数を変えて、３０ＭＨｚ近傍での入力インピーダンスが１．０ｋΩ、７００Ω、４００Ω、２００ΩのＡＣアダプタを使用したＰＬＣ通信実験を行なってデータの転送率を測定した。   In addition, when a PLC communication experiment using an AC adapter with a built-in filter having such an input impedance was performed, the data transfer rate was 98 to 100%, and it was confirmed that good PLC communication was possible. . The inventors further changed the impedance of the normal mode coil CL1 and the number of turns of the common mode coil CL2, and conducted PLC communication experiments using AC adapters with input impedances near 30 MHz of 1.0 kΩ, 700Ω, 400Ω, and 200Ω. The data transfer rate was measured.

図４には、その測定結果である入力インピーダンスとデータ転送率の関係を示す。図４より、入力インピーダンスを６００Ω以上にすればおよそ７０％以上のデータ転送率が得られ、入力インピーダンスを７００Ω以上にすればおよそ９０％以上のデータ転送率が得られ、入力インピーダンスを９００Ω以上にすればおよそ９５％以上のデータ転送率が得られることが分かる。   FIG. 4 shows the relationship between the input impedance, which is the measurement result, and the data transfer rate. As shown in FIG. 4, when the input impedance is 600Ω or more, a data transfer rate of about 70% or more is obtained, and when the input impedance is 700Ω or more, a data transfer rate of about 90% or more is obtained, and the input impedance is set to 900Ω or more. It can be seen that a data transfer rate of about 95% or more can be obtained.

これより、７０％以上のデータ転送率とするには入力インピーダンスを６００Ω以上にすれば良く、９０％以上のデータ転送率とするには入力インピーダンスを７００Ω以上にすれば良く、９５％以上のデータ転送率とするには入力インピーダンスを９００Ω以上にすれば良いと考える。
＜応用例＞
図５は、前記実施形態のＡＣアダプタの応用例を示す。 Therefore, to achieve a data transfer rate of 70% or higher, the input impedance should be 600Ω or higher. To achieve a data transfer rate of 90% or higher, the input impedance should be 700Ω or higher. In order to obtain a transfer rate, it is considered that the input impedance should be 900Ω or more.
<Application example>
FIG. 5 shows an application example of the AC adapter of the embodiment.

この応用例のＡＣアダプタ１０は、携帯電話機２０を充電するためのＤＣ−ＤＣコンバータ１４とＰＬＣ通信モジュール１５とを内蔵したものであり、ＡＣアダプタ１０の本体にはパーソナルコンピュータ（以下、パソコンと称する）３０とＰＬＣ通信モジュール１５とを接続するケーブル４０の一端が結合されるコネクタが設けられている。   The AC adapter 10 of this application example includes a DC-DC converter 14 for charging the mobile phone 20 and a PLC communication module 15. The main body of the AC adapter 10 is a personal computer (hereinafter referred to as a personal computer). ) A connector is provided to which one end of the cable 40 connecting the PLC 30 and the PLC communication module 15 is coupled.

図示しないが、ＤＣ−ＤＣコンバータ１４の一次側に設けられるダイオード・ブリッジ回路１２とプラグ１１との間に、図１や図２に示されているようなノーマルモードコイルもしくはコモンモードコイルあるいはそれらの組み合わせからなるフィルタ１３が設けられ、３０ＭＨｚ近傍での入力インピーダンスが６００Ω以上、望ましくは７００Ω以上、さらに望ましくは９００Ω以上となるように設定される。パソコン３０とＰＬＣ通信モジュール１５とは、例えばＬＡＮケーブルによって接続されるように構成することができる。   Although not shown, between the diode bridge circuit 12 provided on the primary side of the DC-DC converter 14 and the plug 11, a normal mode coil or a common mode coil as shown in FIGS. A filter 13 composed of a combination is provided, and the input impedance in the vicinity of 30 MHz is set to 600Ω or higher, preferably 700Ω or higher, and more preferably 900Ω or higher. The personal computer 30 and the PLC communication module 15 can be configured to be connected by, for example, a LAN cable.

この実施形態のＡＣアダプタ１０は、入力インピーダンスが６００Ω以上とされているため、２ＭＨｚ〜３０ＭＨｚの周波数帯において良好な通信を行えるとともに、ＰＬＣ通信モジュール１５を内蔵しているため、携帯電話機２０を充電しながらパソコン３０がＰＬＣ通信を行なうことができるという利点がある。   Since the AC adapter 10 of this embodiment has an input impedance of 600Ω or more, it can perform good communication in the frequency band of 2 MHz to 30 MHz and incorporates the PLC communication module 15, so the mobile phone 20 is charged. However, there is an advantage that the personal computer 30 can perform PLC communication.

なお、この応用例では、携帯電話機２０を充電するＡＣアダプタにＰＬＣ通信モジュールを内蔵させたものを示したが、ノートパソコンの電源用ＡＣアダプタにＰＬＣ通信モジュールを内蔵させてもよいし、液晶モニタ等パソコン周辺機器や家庭用電話機などの電源用ＡＣアダプタにＰＬＣ通信モジュールを内蔵させてもよい。   In this application example, an AC adapter for charging the mobile phone 20 is incorporated with a PLC communication module, but a PLC communication module may be incorporated in a power supply AC adapter of a notebook personal computer, or a liquid crystal monitor. A PLC communication module may be built in a power supply AC adapter such as a PC peripheral device or a home telephone.

以上本発明者によってなされた発明を実施形態に基づき具体的に説明したが、本発明は上記実施形態に限定されるものではなく、その要旨を逸脱しない範囲で種々変更可能である。例えば、前記実施形態では、プラグ１１とノーマルモードコイルＣＬ１との間にヒューズＦが設けられているが、ヒューズＦを設ける位置はここに限定されるものではないし、ヒューズを省略した構成も可能である。   Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, in the embodiment, the fuse F is provided between the plug 11 and the normal mode coil CL1, but the position where the fuse F is provided is not limited to this, and a configuration in which the fuse is omitted is also possible. is there.

以上の説明では主として本発明者によってなされた発明をその背景となった利用分野であるＡＣアダプタに適用した場合について説明したが、本発明はそれに限定されず、交流電圧を直流電圧に変換して出力するＡＣ-ＤＣコンバータを有するものであれば、例えばパソコン本体内に内蔵される電源装置やセットトップボックスやオーディオ機器などに内蔵される電源装置にも広く利用することができる。   In the above description, the case where the invention made mainly by the present inventor is applied to the AC adapter which is the field of use behind the invention has been described. However, the present invention is not limited thereto, and an AC voltage is converted into a DC voltage. As long as it has an AC-DC converter for output, it can be widely used in, for example, a power supply device built in a personal computer body, a power supply device built in a set top box, an audio device, or the like.

本発明の一実施形態のＡＣアダプタを示す回路構成図である。It is a circuit block diagram which shows the AC adapter of one Embodiment of this invention. 実施形態において使用されるフィルタの他の例を示す回路構成図である。It is a circuit block diagram which shows the other example of the filter used in embodiment. 実施形態のＡＣアダプタにおいて、ノーマルモードコイルＣＬ１のインピーダンスやコモンモードコイルＣＬ２の巻き数の異なるフィルタを使用して周波数を変化させ入力インピーダンスを測定した結果を示すグラフである。In the AC adapter of an embodiment, it is a graph which shows the result of having changed frequency using the filter from which the impedance of normal mode coil CL1 and the number of turns of common mode coil CL2 were changed, and measuring input impedance. 実施形態のＡＣアダプタにおいて、入力インピーダンスを色々変えてＰＬＣ通信実験を行なってデータ転送率を測定した結果を示す入力インピーダンス−データ転送率特性を示すグラフである。5 is a graph showing an input impedance-data transfer rate characteristic showing a result of measuring a data transfer rate by performing a PLC communication experiment with various input impedances in the AC adapter of the embodiment. 前記実施形態のＡＣアダプタの応用例を示すブロック構成図である。It is a block block diagram which shows the application example of the AC adapter of the said embodiment. ラインフィルタを持たない通常のＡＣアダプタの入力部の構成を示す回路構成図である。It is a circuit block diagram which shows the structure of the input part of the normal AC adapter which does not have a line filter. 通常のＡＣアダプタにおける周波数と入力インピーダンスとの関係を示すグラフである。It is a graph which shows the relationship between the frequency and input impedance in a normal AC adapter.

符号の説明Explanation of symbols

１０ ＡＣアダプタ
１１ プラグ
１２ ダイオード・ブリッジ回路
１３ フィルタ
１４ ＤＣ−ＤＣコンバータ
１５ ＰＬＣ通信モジュール
２０ 携帯電話機
３０ パソコン
４０ ケーブル
Ｌ１，Ｌ２ 電源ライン
ＣＬ１ ノーマルモードコイル
ＣＬ２ コモンモードコイル 10 AC adapter 11 Plug 12 Diode bridge circuit 13 Filter 14 DC-DC converter 15 PLC communication module 20 Mobile phone 30 Personal computer 40 Cable L1, L2 Power line CL1 Normal mode coil CL2 Common mode coil

Claims (7)

交流電圧を直流電圧に変換する整流回路と、該整流回路により変換された直流電圧を異なる電位の直流電圧に変換するＤＣ−ＤＣコンバータと、を内蔵したＡＣアダプタであって、前記交流電圧の入力端子と前記整流回路との間にフィルタを備え、２ＭＨｚ〜３０ＭＨｚの信号に対する入力インピーダンスが６００Ω以上となるように構成されていることを特徴とするＡＣアダプタ。   An AC adapter having a built-in rectifier circuit that converts an AC voltage into a DC voltage, and a DC-DC converter that converts the DC voltage converted by the rectifier circuit into a DC voltage having a different potential. An AC adapter comprising a filter between a terminal and the rectifier circuit, wherein the input impedance for a signal of 2 MHz to 30 MHz is 600Ω or more. 前記フィルタは、ノーマルモードコイルもしくはコモンモードコイルあるいはそれらの組み合わせからなることを特徴とする請求項１に記載のＡＣアダプタ。   The AC adapter according to claim 1, wherein the filter includes a normal mode coil, a common mode coil, or a combination thereof. ２ＭＨｚ〜３０ＭＨｚの信号に対する入力インピーダンスが７００Ω以上となるように構成されていることを特徴とする請求項１または２に記載のＡＣアダプタ。   The AC adapter according to claim 1, wherein an input impedance for a signal of 2 MHz to 30 MHz is 700Ω or more. ２ＭＨｚ〜３０ＭＨｚの信号に対する入力インピーダンスが９００Ω以上となるように構成されていることを特徴とする請求項３に記載のＡＣアダプタ。   The AC adapter according to claim 3, wherein an input impedance for a signal of 2 MHz to 30 MHz is 900Ω or more. 交流電圧を直流電圧に変換する整流回路と、該整流回路により変換された直流電圧を他の電位の直流電圧に変換するＤＣ−ＤＣコンバータと、ＰＬＣ通信機能を有するＰＬＣ通信モジュールと、を内蔵したＡＣアダプタであって、
前記交流電圧の入力端子と前記整流回路との間に、ノーマルモードコイルもしくはコモンモードコイルあるいはそれらの組み合わせからなるフィルタを備え、２ＭＨｚ〜３０ＭＨｚの信号に対する入力インピーダンスが６００Ω以上となるように構成されていることを特徴とするＡＣアダプタ。 Built-in rectifier circuit for converting AC voltage to DC voltage, DC-DC converter for converting DC voltage converted by rectifier circuit to DC voltage of other potential, and PLC communication module having PLC communication function An AC adapter,
A filter comprising a normal mode coil, a common mode coil, or a combination thereof is provided between the AC voltage input terminal and the rectifier circuit, and the input impedance for a signal of 2 MHz to 30 MHz is 600Ω or more. An AC adapter characterized by ＡＣ−ＤＣコンバータを内蔵し、入力端子と整流回路との間に、ノーマルモードコイルもしくはコモンモードコイルあるいはそれらの組み合わせからなるフィルタを備え、２ＭＨｚ〜３０ＭＨｚの信号に対する入力インピーダンスが６００Ω以上となるように構成されていることを特徴とする電源装置。   An AC-DC converter is built in, and a filter composed of a normal mode coil, a common mode coil, or a combination thereof is provided between the input terminal and the rectifier circuit so that the input impedance for a signal of 2 MHz to 30 MHz is 600Ω or more. A power supply device comprising: 請求項６に記載の電源装置と、ＰＬＣ通信機能を有するＰＬＣ通信モジュールとを備えることを特徴とする通信装置。   A communication apparatus comprising the power supply apparatus according to claim 6 and a PLC communication module having a PLC communication function.
JP2008059621A 2008-03-10 2008-03-10 Ac adaptor for plc and power supply device, and communication device Pending JP2009218798A (en)

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