JP2015126582A - Power supply and reception system, power supply equipment and power reception equipment - Google Patents

Power supply and reception system, power supply equipment and power reception equipment Download PDF

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JP2015126582A
JP2015126582A JP2013268405A JP2013268405A JP2015126582A JP 2015126582 A JP2015126582 A JP 2015126582A JP 2013268405 A JP2013268405 A JP 2013268405A JP 2013268405 A JP2013268405 A JP 2013268405A JP 2015126582 A JP2015126582 A JP 2015126582A
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power
power supply
supply
reception
receiving
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大崇 鈴木
Hirotaka Suzuki
大崇 鈴木
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NEC Platforms 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
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Abstract

PROBLEM TO BE SOLVED: To change power without suspending power supply, when a power change becomes necessary during the power supply.SOLUTION: In a power supply and reception system for supplying power from power supply equipment to power reception equipment through connection means, the power supply equipment includes first power supply means and second power supply means. The power reception equipment includes first power reception means, second power reception means and changeover means. The changeover means, when the first power supply means is supplying first power to the first power reception means, requests from the second power reception means to the second power supply means to supply second power. Based on the request, the second power supply means supplies the second power to the second power reception means. Also, the changeover means suspends the power reception of first power according to the supply of the second power.

Description

本発明は、ＰｏＥ（Ｐｏｗｅｒ ｏｖｅｒ Ｅｔｈｅｒｎｅｔ（登録商標））による電力供給技術に関する。   The present invention relates to a power supply technique using PoE (Power over Ethernet (registered trademark)).

ＰｏＥによる電力供給は、イーサネット（登録商標）のケーブルを介して給電機器から受電機器へ電力を供給する技術であり、ＩＥＥＥ８０２．３ａｆやこれを拡張したＩＥＥＥ８０２．３ａｔで標準化されている。   The power supply by PoE is a technique for supplying power from a power supply device to a power receiving device via an Ethernet (registered trademark) cable, and is standardized by IEEE 802.3af and IEEE 802.3at which is an extension thereof.

図２に、既存のＰｏＥ給受電システムの構成を示す。図２に示すように、給受電システムの給電側の給電機器１０は、給電制御をするＰＳＥ１２（Ｐｏｗｅｒ Ｓｏｕｒｃｉｎｇ Ｅｑｕｉｐｍｅｎｔ）を備える。受電側の受電機器１１は、受電制御をするＰＤ１６（Ｐｏｗｅｒｅｄ Ｄｅｖｉｃｅ）を備える。給電機器１０のＲＪ４５コネクタ１３と受電機器１１のＲＪ４５コネクタ１５とを、イーサネットケーブル１４で接続することで給電経路を構成して給電を行う。   FIG. 2 shows the configuration of an existing PoE power supply / reception system. As illustrated in FIG. 2, the power supply device 10 on the power supply side of the power supply / reception system includes a PSE 12 (Power Source Equipment) that performs power supply control. The power receiving device 11 on the power receiving side includes a PD 16 (Powered Device) that performs power reception control. The RJ45 connector 13 of the power supply device 10 and the RJ45 connector 15 of the power reception device 11 are connected by the Ethernet cable 14 to configure a power supply path and perform power supply.

ＰＳＥ１２は、ＲＪ４５コネクタ１３の１−２ピン、３−６ピン、４−５ピン、７−８ピンのデータ線の内の２対、すなわち、１−２ピンと３−６ピン、または、４−５ピンと７−８ピンを使って電力を給電する。図１では、１−２ピンと３−６ピンを使用して給電する場合を示している。   The PSE 12 has two pairs of data lines 1-2, 3-6, 4-5, 7-8 of the RJ45 connector 13, that is, 1-2 and 3-6, or 4- Power is supplied using pins 5 and 7-8. FIG. 1 shows a case where power is supplied using the 1-2 pin and the 3-6 pin.

ＰＤ１６は、ＲＪ４５コネクタ１５の１−２ピン、３−６ピン、４−５ピン、７−８ピンのデータ線の内の２対、すなわち、１−２ピンと３−６ピン、または、４−５ピンと７−８ピンを使って電力を受電する。図１では、１−２ピンと３−６ピンを使用して受電する場合を示している。   The PD 16 has two pairs of data lines 1-2, 3-6, 4-5, 7-8 of the RJ45 connector 15, that is, 1-2 and 3-6, or 4- Power is received using pins 5 and 7-8. FIG. 1 shows a case where power is received using pins 1-2 and 3-6.

ＰＳＥ１２は、給電機器１０と受電機器１１とが接続されると、ＰＤ１６の接続の検出と電力クラスの確認とを行い、確認された電力クラスでの給電を行う。ＰＳＥ１２は、給電線である１−２ピン間と３−６ピン間に特定の抵抗値を検出することにより、ＰＤ１６の接続を検出する。また、ＰＳＥ１２は、ＰＤ１６に特定の電圧を印加することで流れる電流の電流値を測定し、その測定結果に基づいて受電機器を４つの電力クラスに分類する。４つの電力クラスとは、クラス１が０．４４Ｗ〜３．８４Ｗ、クラス２が３．８４Ｗ〜６．４９Ｗ、クラス３が６．４９Ｗ〜１２．９５Ｗ、及びクラス０が０．４４Ｗ〜１２．９５Ｗの消費電力である。クラス０は、電力クラス分けに対応していない受電機器に適用される。   When the power feeding device 10 and the power receiving device 11 are connected, the PSE 12 detects the connection of the PD 16 and confirms the power class, and performs power feeding in the confirmed power class. The PSE 12 detects the connection of the PD 16 by detecting a specific resistance value between the 1-2 pins and the 3-6 pins which are power supply lines. Further, the PSE 12 measures the current value of the flowing current by applying a specific voltage to the PD 16, and classifies the power receiving device into four power classes based on the measurement result. The four power classes are: Class 1 0.44 W to 3.84 W, Class 2 3.84 W to 6.49 W, Class 3 6.49 W to 12.95 W, and Class 0 0.44 W to 12.4 W. The power consumption is 95W. Class 0 is applied to a power receiving device that does not support power classification.

ＰＤ１６は、電流量の調整を抵抗で行う。機器設計者は受電機器に合わせた電力クラスを表す抵抗を機器に実装する。   The PD 16 adjusts the amount of current with a resistor. The device designer mounts a resistor representing the power class in accordance with the power receiving device on the device.

ところで、受電機器は常に最大の消費電力で動いているとは限らず、低い電力で動作していることも多い。この場合でも、ＰＤは最大の消費電力の時の電力クラスをＰＳＥに伝えるため、ＰＳＥは常に高い電力クラスで動作している。また、給電中に電力クラスの変更が必要となる場合もある。しかしながら、ＰＳＥは、電力クラスの確認を、給電を開始する前に行っている。給電の途中で電力クラスを変更する技術が、特許文献１に開示されている。   By the way, the power receiving device does not always operate with the maximum power consumption, and often operates with low power. Even in this case, since the PD informs the PSE of the power class at the maximum power consumption, the PSE always operates in a high power class. In addition, the power class may need to be changed during power feeding. However, the PSE checks the power class before starting power feeding. A technique for changing the power class in the middle of power feeding is disclosed in Patent Document 1.

特開２００９−１０６１２７号公報JP 2009-106127 A

しかしながら、特許文献１には以下の問題があった。すなわち、特許文献１の方法では、給電の途中で電力クラスを変更しようとする場合、一旦給電機器からの給電を停止させ、新たな電力クラスを設定し直してから再度給電を開始する必要があった。給電を停止させることで、処理中の動作を停止するための処理を必要とする、再起動のための時間を必要とする、などの問題が生じる。また、特許文献１では、受電機器の内部に補助用の電源を設ける必要がある場合も生じていた。   However, Patent Document 1 has the following problems. That is, in the method of Patent Document 1, when changing the power class in the middle of power supply, it is necessary to stop power supply from the power supply device once, reset a new power class, and start power supply again. It was. Stopping the power supply causes problems such as requiring processing for stopping the operation being processed, and requiring time for restarting. Moreover, in patent document 1, the case where it was necessary to provide the power supply for assistance inside the power receiving apparatus had also arisen.

本発明は、上記の課題に鑑みてなされたものであり、その目的は、電力供給中に電力の変更の必要が生じた場合、電力供給を停止することなく電力の変更を行うことを可能とすることである。   The present invention has been made in view of the above-described problems, and its purpose is to enable the power to be changed without stopping the power supply when the power needs to be changed during the power supply. It is to be.

本発明による給受電システムは、接続手段を介して給電機器から受電機器に電力供給する給受電システムにおいて、前記給電機器は、第１の給電手段と第２の給電手段とを有し、前記受電機器は、第１の受電手段と第２の受電手段と切り替え手段とを有し、前記第１の給電手段が前記第１の受電手段に第１の電力を供給しているときに、前記切り替え手段は、前記第２の受電手段から前記第２の給電手段へ第２の電力の供給を要求し、前記第２の給電手段は、前記要求に基づいて、前記第２の電力を前記第２の受電手段へ供給し、前記切り替え手段は、前記第２の電力の供給に基づいて前記第１の電力の受電を停止する。   The power supply / reception system according to the present invention is a power supply / reception system that supplies power from a power supply device to a power reception device via a connection unit, wherein the power supply device includes a first power supply unit and a second power supply unit, The device includes a first power receiving unit, a second power receiving unit, and a switching unit, and the switching is performed when the first power feeding unit supplies the first power to the first power receiving unit. The means requests the second power supply means to supply the second power from the second power receiving means, and the second power supply means supplies the second power to the second power supply based on the request. The switching unit stops receiving the first power based on the supply of the second power.

本発明による給電機器は、第１の給電手段と第２の給電手段とを有し、前記第１の給電手段が第１の電力を供給しているときに、前記第２の給電手段は、第２の電力の供給の要求を検出し、前記検出に基づいて前記第２の電力を供給し、前記第１の給電手段は、前記第２の電力の供給に基づいて前記第１の電力の供給を停止する。   The power supply device according to the present invention includes a first power supply unit and a second power supply unit, and when the first power supply unit supplies the first power, the second power supply unit includes: The second power supply request is detected, the second power is supplied based on the detection, and the first power supply unit is configured to supply the second power based on the second power supply. Stop supplying.

本発明による受電機器は、第１の受電手段と第２の受電手段と切り替え手段とを有し、前記第１の受電手段が第１の電力を受電しているときに、前記切り替え手段は、前記第２の受電手段から第２の電力の供給を要求し、前記第２の受電手段は、前記要求に基づいて前記第２の電力を受電し、前記切り替え手段は、前記第２の電力の受電に基づいて前記第１の電力の受電を停止する。   The power receiving device according to the present invention includes a first power receiving unit, a second power receiving unit, and a switching unit, and when the first power receiving unit receives the first power, the switching unit includes: The second power receiving unit requests the second power supply, the second power receiving unit receives the second power based on the request, and the switching unit is configured to receive the second power. Based on the power reception, the power reception of the first power is stopped.

本発明によれば、電力供給中に電力の変更の必要が生じた場合、電力供給を停止することなく電力の変更を行うことが可能となる。   ADVANTAGE OF THE INVENTION According to this invention, when the necessity for the change of electric power arises during electric power supply, it becomes possible to change electric power, without stopping electric power supply.

本発明の第１の実施形態の給受電システムの構成を示す図である。It is a figure which shows the structure of the power receiving / receiving system of the 1st Embodiment of this invention. 既存の給受電システムの構成を示す図である。It is a figure which shows the structure of the existing power receiving / receiving system. 本発明の第２の実施形態の給受電システムの構成を示す図である。It is a figure which shows the structure of the power receiving / receiving system of the 2nd Embodiment of this invention. 本発明の第２の実施形態の給受電システムの動作を示す状態遷移図である。It is a state transition diagram which shows operation | movement of the power receiving / receiving system of the 2nd Embodiment of this invention. 本発明の第２の実施形態の給受電システムの動作を示す状態遷移図である。It is a state transition diagram which shows operation | movement of the power receiving / receiving system of the 2nd Embodiment of this invention.

以下、図を参照しながら、本発明の実施形態を詳細に説明する。但し、以下に述べる実施形態には、本発明を実施するために技術的に好ましい限定がされているが、発明の範囲を以下に限定するものではない。
（第１の実施形態）
図１は、本発明の第１の実施形態の給受電システムの構成を示す図である。本実施形態の給受電システム１は、接続手段４を介して給電機器２から受電機器３に電力供給する。給電機器２は、第１の給電手段５と第２の給電手段６とを有する。受電機器３は、第１の受電手段７と第２の受電手段８と切り替え手段９とを有する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the preferred embodiments described below are technically preferable for carrying out the present invention, but the scope of the invention is not limited to the following.
(First embodiment)
FIG. 1 is a diagram showing a configuration of a power supply / reception system according to a first embodiment of the present invention. The power supply / reception system 1 of the present embodiment supplies power from the power supply device 2 to the power reception device 3 via the connection unit 4. The power supply device 2 includes a first power supply unit 5 and a second power supply unit 6. The power receiving device 3 includes a first power receiving unit 7, a second power receiving unit 8, and a switching unit 9.

第１の給電手段５から第１の受電手段７に第１の電力を供給しているときに、切り替え手段９は、第２の受電手段８から第２の給電手段６へ第２の電力の供給を要求する。第２の給電手段６は、前記要求に基づいて、第２の電力を第２の受電手段８へ供給する。切り替え手段９は、第２の電力の供給に基づいて第１の電力の受電を停止する。   When the first power is supplied from the first power supply means 5 to the first power reception means 7, the switching means 9 supplies the second power from the second power reception means 8 to the second power supply means 6. Request supply. The second power supply unit 6 supplies the second power to the second power reception unit 8 based on the request. The switching unit 9 stops receiving the first power based on the supply of the second power.

本実施形態によれば、電力供給中に電力の変更の必要が生じた場合、電力供給を停止することなく電力の変更を行うことが可能となる。
（第２の実施形態）
（構造の説明）
図３は、本発明の第２の実施形態の給受電システムの構成を示す図である。本実施形態の給受電システム１００は、ＰｏＥを行う給電機器１０１と受電機器１０２とイーサネットケーブル１０８とを備える。給電機器１０１と受電機器１０２とは、ＲＪ４５コネクタ１０７と１０９とを備え、イーサネットケーブル１０８を介して接続されている。 According to the present embodiment, when it is necessary to change the power during the power supply, the power can be changed without stopping the power supply.
(Second Embodiment)
(Description of structure)
FIG. 3 is a diagram showing a configuration of a power supply / reception system according to the second embodiment of the present invention. The power supply / reception system 100 of this embodiment includes a power supply device 101 that performs PoE, a power reception device 102, and an Ethernet cable 108. The power feeding device 101 and the power receiving device 102 include RJ45 connectors 107 and 109 and are connected via an Ethernet cable 108.

本実施形態の給電機器１０１は、２つのＰＳＥであるＰＳＥ１０４とＰＳＥ１０５とを備える。ＰＳＥ１０４、および、ＰＳＥ１０５は、ＲＪ４５コネクタ１０７のデータ線である１−２ピンと３−６ピン、および、４−５ピンと７−８ピンを使って電力を給電する。ＰＳＥ１０４とＰＳＥ１０５は、各々トランス１０６の中点に接続され、それぞれ独立してＰＤ１１１とＰＤ１１２の接続と電力クラスの検出を行い給電を行う。給電では、ＰｏＥの指定した電力クラスに基づく電圧を印加する。トランス１０６は、また、ＰＨＹ１０３（物理層、Ｐｈｙｓｉｃａｌ Ｌａｙｅｒ）にも接続し、イーサネットのデータはＰＨＹ１０３を介して処理される。   The power supply apparatus 101 according to the present embodiment includes two PSEs, PSE104 and PSE105. The PSE 104 and the PSE 105 supply power using the data pins 1-2 and 3-6, and the pins 4-5 and 7-8 of the RJ45 connector 107. The PSE 104 and the PSE 105 are connected to the midpoint of the transformer 106, respectively, and independently connect to the PD 111 and the PD 112 and detect the power class to supply power. In power feeding, a voltage based on a power class designated by PoE is applied. The transformer 106 is also connected to a PHY 103 (physical layer, physical layer), and Ethernet data is processed via the PHY 103.

本実施形態の受電機器１０２は、２つのＰＤであるＰＤ１１１とＰＤ１１２とを備える。ＰＤ１１１、および、ＰＤ１１２は、ＲＪ４５コネクタ１０９のデータ線である１−２ピンと３−６ピン、および、４−５ピンと７−８ピンを使って電力を受電する。ＰＤ１１１とＰＤ１１２は、各々トランス１１０の中点に接続され、それぞれ独立してＰＳＥ１０４とＰＳＥ１０５からの電力を受電する。トランス１１０は、また、ＰＨＹ１１６にも接続し、イーサネットのデータはＰＨＹ１１６を介して処理される。   The power receiving apparatus 102 of the present embodiment includes two PDs PD111 and PD112. The PD 111 and the PD 112 receive power using the data pins 1-2 and 3-6, and the pins 4-5 and 7-8 of the RJ45 connector 109. PD 111 and PD 112 are each connected to the midpoint of transformer 110 and independently receive power from PSE 104 and PSE 105. The transformer 110 is also connected to the PHY 116, and Ethernet data is processed via the PHY 116.

トランス１１０からＰＤ１１１、１１２への受電経路にはスイッチ１１３、１１４を備える。このスイッチ１１３、１１４のＯＮ／ＯＦＦ制御はＣＰＵ１１５（中央処理機器、Ｃｅｎｔｒａｌ Ｐｒｏｃｅｓｓｉｎｇ Ｕｎｉｔ）が行う。ＣＰＵ１１５は、スイッチ１１３、１１４をＯＦＦとした時、ＰＤ１１１、ＰＤ１１２の電力クラスを表す抵抗値の設定を変更する機能を有する。さらに、ＣＰＵ１１５は、ＰＤ１１１またはＰＤ１１２が受電しているか否かの状態を検出し、スイッチ１１３、スイッチ１１４のＯＮ／ＯＦＦを個別に制御することができる。   The power receiving path from the transformer 110 to the PDs 111 and 112 includes switches 113 and 114. The CPU 115 (central processing unit, Central Processing Unit) performs ON / OFF control of the switches 113 and 114. The CPU 115 has a function of changing the setting of the resistance value indicating the power class of the PD 111 and PD 112 when the switches 113 and 114 are turned off. Furthermore, the CPU 115 can detect whether the PD 111 or the PD 112 is receiving power and can individually control ON / OFF of the switch 113 and the switch 114.

本実施形態では、給電機器１０１と受電機器１０２は、図２では給電と受電には使用しないデータ線も給電に利用する構成を有する。すなわち、ＰＳＥ１０４からＰＵ１１１への電力供給の経路と、ＰＳＥ１０５からＰＵ１１２への電力供給の経路との、２つの電力供給の経路を有する。電力供給は２つの経路の内の１つで行うことができる。経路の選定はＣＰＵ１１５が行う。   In the present embodiment, the power supply device 101 and the power reception device 102 have a configuration in which a data line that is not used for power supply and power reception in FIG. 2 is also used for power supply. That is, there are two power supply paths: a power supply path from the PSE 104 to the PU 111 and a power supply path from the PSE 105 to the PU 112. Power can be supplied by one of two paths. The CPU 115 performs route selection.

以上の構成により、給電機器１０１と受電機器１０２は、電力クラスを切り替える必要がある時に、２つの経路を利用して、一方の経路で電力供給を行いながら、他方の経路で電力クラスの検出を行う。その後、検出を行った前記他方の経路で検出された電力クラスに基づいた電力供給を行うように、電力供給の経路を前記一方の経路から前記他方の経路に切り替えることができる。よって、電力供給を停止させずに電力を切り替えることが可能となる。
（動作の説明）
図４は、図３の給電機器１０１と受電機器１０２とを接続した後の動作を示す状態遷移図である。受電機器１０２のスイッチ１１３とスイッチ１１４は、給電機器１０１が接続する前からＯＮとする。また、給電機器１０１は、定期的に接続の検出処理を行っていてもよい。 With the above configuration, when the power supply device 101 and the power receiving device 102 need to switch the power class, the power supply is detected on the other route while supplying power on one route using the two routes. Do. Thereafter, the power supply path can be switched from the one path to the other path so as to perform power supply based on the power class detected in the other path that has been detected. Therefore, it is possible to switch the power without stopping the power supply.
(Description of operation)
FIG. 4 is a state transition diagram illustrating an operation after the power feeding device 101 and the power receiving device 102 of FIG. 3 are connected. The switch 113 and the switch 114 of the power receiving device 102 are turned on before the power supply device 101 is connected. In addition, the power supply apparatus 101 may periodically perform connection detection processing.

ステップ２０１で、給電機器１０１と受電機器１０２が接続すると、給電機器１０１のＰＳＥ１０４はＰＤ１１１の接続を検出する。同様に、ＰＳＥ１０５はＰＤ１１２の接続を検出する。ＰＤ１１１とＰＤ１１２の接続検出を行うＰＳＥ１０４とＰＳＥ１０５は、それぞれ独立して動作を行う。   When the power supply device 101 and the power reception device 102 are connected in step 201, the PSE 104 of the power supply device 101 detects the connection of the PD 111. Similarly, the PSE 105 detects the connection of the PD 112. The PSE 104 and the PSE 105 that detect the connection between the PD 111 and the PD 112 operate independently of each other.

ステップ２０２で、ＰＳＥ１０４はＰＤ１１１の電力クラスを検出し、ここでは例えばクラス２と判断する。ＰＳＥ１０５はＰＤ１１２の電力クラスを検出し、同様にクラス２と判断する。   In step 202, the PSE 104 detects the power class of the PD 111, and determines that it is class 2, for example. The PSE 105 detects the power class of the PD 112 and similarly determines that it is class 2.

ステップ２０３で、ＰＳＥ１０４はＰＤ１１１に対して、ＰＳＥ１０５はＰＤ１１２に対して、それぞれ給電を開始する。   In step 203, the PSE 104 starts feeding power to the PD 111, and the PSE 105 starts feeding power to the PD 112, respectively.

ステップ２０４で、受電機器１０２のＣＰＵ１１５は、ＰＤ１１１とＰＤ１１２の双方が受電したと判断すると、スイッチ１１４をＯＦＦする。スイッチ１１３をＯＦＦしてもよいが、ここではスイッチ１１４をＯＦＦするとする。   If the CPU 115 of the power receiving apparatus 102 determines in step 204 that both the PD 111 and the PD 112 have received power, the switch 114 is turned OFF. The switch 113 may be turned off, but here the switch 114 is turned off.

ステップ２０５で、ＰＳＥ１０５はＰＤ１１２との接続が切れたため、給電を停止する。受電機器１０２は、ＰＤ１１１で受電しているので、受電機器１０２でのデータ処理などの動作を行うことができる。   In step 205, since the PSE 105 is disconnected from the PD 112, the power supply is stopped. Since the power receiving device 102 is receiving power by the PD 111, operations such as data processing in the power receiving device 102 can be performed.

なお、ステップ２０２で、双方のＰＤで電力クラスを確認した段階で、ＣＰＵ１１５は、一方のスイッチをＯＦＦし、ステップ２０３で、他方のＰＤだけに給電するようにしてもよい。   In step 202, when the power class is confirmed by both PDs, the CPU 115 may turn off one switch, and in step 203, power may be supplied only to the other PD.

図４の動作の後、受電機器１０２の負荷が変化し、電力クラスを２から３に変更する必要が生じたとする。このときの状態遷移図を図５に示す。   Assume that after the operation of FIG. 4, the load of the power receiving device 102 changes and the power class needs to be changed from 2 to 3. A state transition diagram at this time is shown in FIG.

ステップ３０１で、ＣＰＵ１１５は、ＰＤ１１２に対して、電力クラス３を表す抵抗の値に変更する。   In step 301, the CPU 115 changes the resistance value representing the power class 3 for the PD 112.

ステップ３０２で、ＣＰＵ１１５は、スイッチ１１４をＯＮにする。   In step 302, the CPU 115 turns on the switch 114.

ステップ３０３で、ＰＳＥ１０５は、ＰＤ１１２の接続を検出する。   In step 303, the PSE 105 detects the connection of the PD 112.

ステップ３０４で、ＰＳＥ１０５は、ＰＤ１１２に新たに設定された電力クラス３を検出する。   In step 304, the PSE 105 detects the power class 3 newly set in the PD 112.

ステップ３０５で、ＰＳＥ１０５は、ＰＤ１１２に対して給電を開始する。   In step 305, the PSE 105 starts supplying power to the PD 112.

ステップ３０６で、ＣＰＵ１１５は、ＰＤ１１２に給電されたことを検出した後、スイッチ１１３をＯＦＦする。   In step 306, the CPU 115 detects that power is supplied to the PD 112 and then turns off the switch 113.

ステップ３０７で、ＰＳＥ１０４は、ＰＤ１１１との接続が切れたため、給電を停止する。受電機器１０２は、ＰＤ１１２で受電しているので、受電機器１０２でのデータ処理などの動作を、新たな電力クラス３での給電を受けて、行うことができる。   In step 307, the PSE 104 stops power supply because the connection with the PD 111 is lost. Since the power receiving apparatus 102 is receiving power by the PD 112, operations such as data processing in the power receiving apparatus 102 can be performed by receiving power supply in the new power class 3.

この後、さらに電力クラスの変更の必要が生じた場合、ＣＰＵ１１５はＰＤ１１１に対して新たな電力クラスを表す抵抗の値を変更する。その後、スイッチ１１３をＯＮすると、ＰＳＥ１０４はＰＤ１１１の接続を検出し、続いてＰＤ１１１に新たに設定された電力クラスを検出し、給電を開始する。ＣＰＵ１１５はＰＦ１１１に給電されたことを検出した後、スイッチ１１４をＯＦＦする。ＰＳＥ１０５は、ＰＤ１１２との接続が切れたため、給電を停止する。   Thereafter, when the power class needs to be further changed, the CPU 115 changes the value of the resistance representing the new power class with respect to the PD 111. After that, when the switch 113 is turned on, the PSE 104 detects the connection of the PD 111, subsequently detects the power class newly set in the PD 111, and starts power feeding. After detecting that the power is supplied to the PF 111, the CPU 115 turns off the switch 114. The PSE 105 stops power supply because the connection with the PD 112 is disconnected.

以降、電力クラスを変更する場合には、上記の動作を繰り返すことで変更が可能である。   Thereafter, when the power class is changed, it can be changed by repeating the above operation.

例えば、もし、本実施形態の給電機器１０１または受電機器１０２が、図２に示す受電機器１１または給電機器１０に接続した場合、給電受電の経路は１経路だけとなり、１経路での給電受電が行われる。受電機器１０２においては、ＣＰＵ１１５は、本実施形態の給電機器１０１とは異なる給電機器が接続されたと判断し、スイッチの制御は行わず、スイッチ１１３とスイッチ１１４はＯＮのままで、上記の電力クラスの変更は行われない。   For example, if the power supply device 101 or the power reception device 102 of the present embodiment is connected to the power reception device 11 or the power supply device 10 shown in FIG. 2, the power supply / reception route is only one route, and the power supply / reception in one route is possible. Done. In the power receiving device 102, the CPU 115 determines that a power feeding device different from the power feeding device 101 of the present embodiment is connected, does not control the switch, the switch 113 and the switch 114 remain ON, and the power class described above. No changes are made.

本実施形態によれば、電力供給中に電力の変更の必要が生じた場合、電力供給を停止することなく電力の変更を行うことが可能となる。   According to the present embodiment, when it is necessary to change the power during the power supply, the power can be changed without stopping the power supply.

本発明は上記実施形態に限定されることなく、特許請求の範囲に記載した発明の範囲内で、種々の変形が可能であり、それらも本発明の範囲内に含まれるものであることはいうまでもない。   The present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the invention described in the claims, and it is also included within the scope of the present invention. Not too long.

１、１００ 給受電システム
２、１０、１０１ 給電機器
３、１１、１０２ 受電機器
４ 接続手段
５ 第１の給電手段
６ 第２の給電手段
７ 第１の受電手段
８ 第２の受電手段
９ 切り替え手段
１２、１０４、１０５ ＰＳＥ
１３、１５、１０７、１０９ ＲＪ４５コネクタ
１４、１０８ イーサネットケーブル
１６、１１１、１１２ ＰＤ
１０３、１１６ ＰＨＹ
１０６、１１０ トランス
１１３、１１４ スイッチ
１１５ ＣＰＵ DESCRIPTION OF SYMBOLS 1,100 Power supply / reception system 2, 10, 101 Power supply apparatus 3, 11, 102 Power reception apparatus 4 Connection means 5 First power supply means 6 Second power supply means 7 First power reception means 8 Second power reception means 9 Switching means 12, 104, 105 PSE
13, 15, 107, 109 RJ45 connector 14, 108 Ethernet cable 16, 111, 112 PD
103, 116 PHY
106, 110 Transformer 113, 114 Switch 115 CPU

Claims (8)

接続手段を介して給電機器から受電機器に電力供給する給受電システムにおいて、
前記給電機器は、第１の給電手段と第２の給電手段とを有し、
前記受電機器は、第１の受電手段と第２の受電手段と切り替え手段とを有し、
前記第１の給電手段が前記第１の受電手段に第１の電力を供給しているときに、前記切り替え手段は、前記第２の受電手段から前記第２の給電手段へ第２の電力の供給を要求し、
前記第２の給電手段は、前記要求に基づいて、前記第２の電力を前記第２の受電手段へ供給し、
前記切り替え手段は、前記第２の電力の供給に基づいて前記第１の電力の受電を停止する、
給受電システム。 In a power supply / reception system that supplies power from a power supply device to a power reception device via a connection means,
The power supply device includes a first power supply unit and a second power supply unit,
The power receiving device includes a first power receiving unit, a second power receiving unit, and a switching unit.
When the first power supply means supplies the first power to the first power reception means, the switching means supplies the second power from the second power reception means to the second power supply means. Demand supply,
The second power supply means supplies the second power to the second power receiving means based on the request,
The switching means stops receiving the first power based on the supply of the second power;
Power supply / reception system. 前記第１の給電手段は、前記第１の電力の受電の停止に基づいて、前記第１の電力の供給を停止する、請求項１記載の給受電システム。 The power supply / reception system according to claim 1, wherein the first power supply unit stops the supply of the first electric power based on the stop of the reception of the first electric power. 前記第１および第２の電力は、ＰｏＥの電力クラスで区分される、請求項１または２記載の給受電システム。 The power supply / reception system according to claim 1 or 2, wherein the first and second electric powers are classified by a PoE power class. 前記接続手段はイーサネットケーブルである、請求項１から３の内の１項記載の給受電システム。 The power supply / reception system according to claim 1, wherein the connection means is an Ethernet cable. 第１の給電手段と第２の給電手段とを有し、
前記第１の給電手段が第１の電力を供給しているときに、
前記第２の給電手段は、第２の電力の供給の要求を検出し、前記検出に基づいて前記第２の電力を供給し、
前記第１の給電手段は、前記第２の電力の供給に基づいて前記第１の電力の供給を停止する、
給電機器。 A first power supply means and a second power supply means;
When the first power supply means supplies the first power,
The second power supply means detects a request for supply of second power, supplies the second power based on the detection,
The first power supply means stops the supply of the first power based on the supply of the second power;
Power supply equipment. 前記第１および第２の電力は、ＰｏＥの電力クラスで区分される、請求項５記載の給電機器。 The power supply device according to claim 5, wherein the first and second powers are classified by a PoE power class. 第１の受電手段と第２の受電手段と切り替え手段とを有し、
前記第１の受電手段が第１の電力を受電しているときに、
前記切り替え手段は、前記第２の受電手段から第２の電力の供給を要求し、
前記第２の受電手段は、前記要求に基づいて前記第２の電力を受電し、
前記切り替え手段は、前記第２の電力の受電に基づいて前記第１の電力の受電を停止する、
受電機器。 A first power receiving means, a second power receiving means, and a switching means;
When the first power receiving means receives the first power,
The switching means requests the second power supply from the second power receiving means,
The second power receiving means receives the second power based on the request,
The switching means stops receiving the first power based on receiving the second power;
Power receiving equipment. 前記第１および第２の電力は、ＰｏＥの電力クラスで区分される、請求項７記載の受電機器。 The power receiving device according to claim 7, wherein the first and second powers are classified by a PoE power class.
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