JP2003274655A - Remote sensing power supply device - Google Patents
Remote sensing power supply deviceInfo
- Publication number
- JP2003274655A JP2003274655A JP2003012704A JP2003012704A JP2003274655A JP 2003274655 A JP2003274655 A JP 2003274655A JP 2003012704 A JP2003012704 A JP 2003012704A JP 2003012704 A JP2003012704 A JP 2003012704A JP 2003274655 A JP2003274655 A JP 2003274655A
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- Prior art keywords
- power supply
- voltage
- load
- supply device
- line
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電源装置から給電
線を介して負荷に供給されている電圧を電圧検出線を介
して検出することで負荷に所定の電圧が供給されるよう
にしたリモートセンス式電源供給装置に関する。より詳
細には、給電線ならびに電圧検出線の断線（未接続を含
む）を検出して負荷への電力供給を遮断または低減でき
るようにしたリモートセンス式電源供給装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control in which a predetermined voltage is supplied to a load by detecting a voltage supplied from a power supply device to a load via a power supply line via a voltage detection line. The present invention relates to a sense type power supply device. More specifically, the present invention relates to a remote sense type power supply device capable of detecting disconnection (including non-connection) of a power supply line and a voltage detection line to cut off or reduce power supply to a load.
【０００２】[0002]
【従来の技術】電源装置から負荷に大電流を供給する場
合、電源装置の出力端子と負荷との間を接続する給電線
による電圧降下が無視できなくなる。電源装置と負荷と
の距離が離れている場合も、給電線の長さに比例して給
電線の抵抗が増加するため給電線による電圧降下が無視
できなくなる。このような場合、負荷端に実際に供給さ
れている電圧を電圧検出線により検出（リモートセン
ス）することで、負荷端の電圧を制御できるリモートセ
ンス式電源供給装置を用いることが多い。2. Description of the Related Art When a large current is supplied from a power supply device to a load, a voltage drop due to a power supply line connecting an output terminal of the power supply device and the load cannot be ignored. Even if the power supply device and the load are separated from each other, the resistance of the power supply line increases in proportion to the length of the power supply line, and the voltage drop due to the power supply line cannot be ignored. In such a case, a remote sense type power supply device that can control the voltage at the load end is often used by detecting (remote sensing) the voltage actually supplied to the load end by a voltage detection line.
【０００３】リモートセンス式電源供給装置では、電圧
検出線の断線や電圧検出線の接続忘れ等があると、負荷
に供給する電圧を正しく制御できなくなる。また、電圧
検出線の断線等に対処するための保護回路の構成によっ
ては、給電線が断線した場合に、電圧検出線を介して負
荷へ電流が供給されてしまうことがある。このため、電
圧検出線の断線や給電線の断線に対処するために、各種
の提案がなされている。In the remote sense type power supply device, if the voltage detection line is broken or the voltage detection line is forgotten to be connected, the voltage supplied to the load cannot be controlled correctly. Further, depending on the configuration of the protection circuit for coping with disconnection of the voltage detection line, when the power supply line is disconnected, current may be supplied to the load via the voltage detection line. Therefore, various proposals have been made to deal with the disconnection of the voltage detection line and the disconnection of the power supply line.
【０００４】特許文献１には、直流電源出力の過電圧検
出回路の入力に、過電圧検出値より高い直流電源出力以
外の電圧を抵抗を通じて印加することにより、リモート
センス線の接続が断たれた場合に負荷への電力供給を停
止するようにした過電圧検出回路が記載されている。In Patent Document 1, when a voltage other than the DC power supply output higher than the overvoltage detection value is applied to the input of the overvoltage detection circuit for the DC power supply output through a resistor, the connection of the remote sense line is broken. An overvoltage detection circuit for stopping power supply to a load is described.
【０００５】特許文献２には、負荷の電源供給端子の電
圧を検出して電源出力を安定化するリモートセンス式安
定化電源において、リモートセンス式安定化電源の電源
出力端子と電圧検出端子との間に、ダイオードと抵抗と
の直列回路を設けることで、電源出力の異常からリモー
トセンス式安定化電源を保護するものが記載されてい
る。このリモートセンス式安定化電源保護回路は、電源
供給線が開放状態になったときにリモートセンス線を流
れる電流を抵抗によって制限できる。また、リモートセ
ンス線が開放状態になったときには、ダイオードおよび
抵抗を介して電流が流れ、過大電圧の発生を防止できる
としている。In Patent Document 2, in a remote sense type stabilized power source for detecting a voltage of a power source supply terminal of a load to stabilize a power source output, a power source output terminal and a voltage detection terminal of the remote sense type stabilized power source are disclosed. It is described that a series circuit of a diode and a resistor is provided between them to protect the remote sense stabilized power supply from an abnormality in the power supply output. This remote sense type stabilized power supply protection circuit can limit the current flowing through the remote sense line by a resistor when the power supply line is opened. Moreover, when the remote sense line is opened, a current flows through the diode and the resistor, and it is possible to prevent the generation of an excessive voltage.
【０００６】特許文献３には、出力電圧をリモートセン
ス線を用いてセンスし、センスした出力電圧と基準電圧
とを比較し、誤差を増幅することにより入力電源の電圧
制御を行なう定電圧電源回路において、センスした出力
電圧を分割抵抗により分圧された電圧ＶＡが一方の入力
端子Ａに入力され、基準電圧が他方の入力端子Ｂに入力
される誤差増幅器と、誤差増幅器の入力端子Ａにカソー
ドが接続され入力端子Ｂにアノードが接続されたホトカ
プラと、ホトカプラのコレクタと内部制御電源との間に
接続された表示素子（発光ダイオード）と、ホトカプラ
がオンのときはホトカプラのエミッタ出力により出力電
圧をオフする信号を供給する駆動回路とを備えたものが
記載されている。In Patent Document 3, a constant voltage power supply circuit which senses an output voltage using a remote sense line, compares the sensed output voltage with a reference voltage, and amplifies an error to control a voltage of an input power supply. , A voltage VA obtained by dividing the sensed output voltage by a dividing resistor is input to one input terminal A and a reference voltage is input to the other input terminal B, and a cathode is provided to the input terminal A of the error amplifier. Is connected and the anode is connected to the input terminal B, the display element (light emitting diode) connected between the collector of the photocoupler and the internal control power supply, and when the photocoupler is on, the output voltage is output by the emitter output of the photocoupler. And a drive circuit that supplies a signal to turn off the power supply.
【０００７】この定電圧電源保護回路は、リモートセン
ス線が断線すると、ホトカプラがオン状態となり表示素
子（発光ダイオード）を点灯させることで、リモートセ
ンス線が断線したことを表示するとともに、出力電圧を
断させる。When the remote sense line is broken, this constant voltage power supply protection circuit turns on the photocoupler to turn on the display element (light emitting diode), thereby indicating that the remote sense line is broken and outputting the output voltage. To cut off.
【０００８】特許文献４には、電源装置から給電線を介
して負荷に給電し、負荷の両端から電源装置に対しリモ
ートセンス線を接続している電力供給装置において、リ
モートセンス線と並列接続した電圧監視線と、電圧監視
線により負荷電源端子の両端の電圧の異常を検出する電
圧検出回路とを具備し、電圧検出回路の出力により負荷
への電力供給を遮断するものが記載されている。In Patent Document 4, in a power supply device in which power is supplied from a power supply device to a load through a power supply line and remote sense lines are connected to the power supply device from both ends of the load, the power supply device is connected in parallel with the remote sense line. It is described that a voltage monitoring line and a voltage detection circuit for detecting an abnormality in the voltage across the load power supply terminal by the voltage monitoring line are provided, and the output of the voltage detection circuit cuts off the power supply to the load.
【０００９】[0009]
【特許文献１】特開昭５８−７９１６７号公報（特開昭
５８−８０５６２号公報）（第１−３項、第３図）[Patent Document 1] Japanese Unexamined Patent Publication No. 58-79167 (Japanese Unexamined Patent Publication No. 58-80562) (1-3, FIG. 3)
【特許文献２】特開昭６１−２４０３０８号公報 （第
１−３項、第１−２図）[Patent Document 2] JP-A-61-240308 (sections 1-3 and 1-2)
【特許文献３】特開昭６１−２６７８０７号公報 （第
１−３項、第１図）[Patent Document 3] Japanese Patent Laid-Open No. 61-267807 (sections 1-3, FIG. 1)
【特許文献４】特開平３−１９５３２０号公報 （第１
−３項、第１−４図）[Patent Document 4] Japanese Patent Laid-Open No. 3-195320
-3, Fig. 1-4)
【００１０】[0010]
【発明が解決しようとする課題】特許文献１の過電圧検
出回路は、リモートセンス線の接続が断たれたことを検
出するために、過電圧検出値より高い直流電源出力以外
の電圧を供給をする必要があり、このための電源が別途
必要になる。The overvoltage detection circuit of Patent Document 1 needs to supply a voltage other than the DC power supply output higher than the overvoltage detection value in order to detect disconnection of the remote sense line. However, a separate power supply for this is required.
【００１１】特許文献２のリモートセンス式安定化電源
保護回路は、電源供給線またはリモートセンス線が開放
状態になったことを検出して、負荷への電源供給を遮断
することはできない。特許文献３の定電圧電源保護回路
は、給電線が断線した場合にも、表示素子（発光ダイオ
ード）が点灯してしまう。The remote sense type stabilized power supply protection circuit of Patent Document 2 cannot detect that the power supply line or the remote sense line is in an open state and cut off the power supply to the load. In the constant voltage power supply protection circuit of Patent Document 3, the display element (light emitting diode) lights up even when the power supply line is broken.
【００１２】特許文献４の電力供給装置は、電圧監視線
が断線等した場合には、その断線に対処することができ
ない。図２は、特許文献２の第２図に示された従来のリ
モートセンス式安定化電源保護回路の回路構成図であ
る。この回路構成は、各リモートセンス線に保護抵抗Ｒ
５１、Ｒ５２をそれぞれ介設しているので、各給電線が
断線した場合、各リモートセンス線に流れる電流を制限
することができる。各保護抵抗Ｒ５１、Ｒ５２の抵抗値
に対して分圧回路を構成する分圧抵抗Ｒ５３の抵抗値を
充分に大きく設定することで、負荷端の電圧を精度良く
検出できる。The power supply device of Patent Document 4 cannot cope with the disconnection of the voltage monitoring line. FIG. 2 is a circuit configuration diagram of the conventional remote sense type stabilized power supply protection circuit shown in FIG. This circuit configuration has a protection resistor R for each remote sense line.
Since 51 and R52 are provided respectively, the current flowing through each remote sense line can be limited when each power supply line is disconnected. The voltage at the load end can be accurately detected by setting the resistance value of the voltage dividing resistor R53 forming the voltage dividing circuit to be sufficiently larger than the resistance values of the protection resistors R51 and R52.
【００１３】しかし、リモートセンス線の一方が断線し
た場合、負荷に供給される電圧は所定の電圧よりもダイ
オードＤ５１、Ｄ５２の順方向電圧降下分（約１ボルト
程度）だけ高くなる。負荷端の電圧が数ボルト変動して
も許容できる場合には、給電を継続しても支障はない。
ところが、負荷端の電圧変動が±０．５ボルト程度しか
許容できない場合には、ダイオードの順方向電圧降下分
（約１ボルト程度）の電圧上昇は支障をきたす。However, when one of the remote sense lines is broken, the voltage supplied to the load becomes higher than the predetermined voltage by the amount of forward voltage drop of the diodes D51 and D52 (about 1 volt). If the voltage at the load end can be tolerated even if it fluctuates by several volts, there is no problem even if power supply is continued.
However, when the voltage fluctuation at the load end is only about ± 0.5 V, the forward voltage drop of the diode (about 1 V) raises the voltage.
【００１４】図３は、特許文献４の第４図に示された従
来の電力供給装置の回路構成図である。この電力供給装
置は、正極側の電源出力端子ＴＰ１と正極側の電圧検出
端子ＴＳ１との間に抵抗Ｒ８１を接続し、負極側の電源
出力端子ＴＰ２と負極側の電圧検出端子ＴＳ２との間に
抵抗Ｒ８２を接続している。各抵抗Ｒ８１、Ｒ８２の抵
抗値を小さな値に設定すれば、リモートセンス線の断線
時に負荷に供給される電圧の上昇を小さくすることがで
きる。FIG. 3 is a circuit configuration diagram of the conventional power supply device shown in FIG. 4 of Patent Document 4. In this power supply device, a resistor R81 is connected between the positive power supply output terminal TP1 and the positive voltage detection terminal TS1, and the negative power supply output terminal TP2 and the negative voltage detection terminal TS2 are connected. The resistor R82 is connected. By setting the resistance value of each of the resistors R81 and R82 to a small value, it is possible to reduce the increase in the voltage supplied to the load when the remote sense line is disconnected.
【００１５】しかしながら、各抵抗Ｒ８１、Ｒ８２の抵
抗値を小さな値に設定した場合、給電線が断線したとき
にリモートセンス線を介して負荷に大きな電流が供給さ
れる。このため、リモートセンス線に電流容量の大きい
ものを使用する必要がある。また、各抵抗Ｒ８１、Ｒ８
２に大きな電流が流れるため、各抵抗Ｒ８１、Ｒ８２は
電力の大きいものを使用する必要がある。さらに、各抵
抗Ｒ８１、Ｒ８２の放熱対策等が必要になる。However, when the resistance value of each of the resistors R81 and R82 is set to a small value, a large current is supplied to the load via the remote sense line when the feeder line is broken. Therefore, it is necessary to use a remote sense line having a large current capacity. Also, the resistors R81 and R8
Since a large current flows through the resistor 2, it is necessary to use a resistor having a large electric power as each of the resistors R81 and R82. Further, it is necessary to take heat dissipation measures for the resistors R81 and R82.
【００１６】そこで、本発明は、給電線または電圧検出
線の断線等を検出して、負荷への電力供給を遮断または
低減できるリモートセンス式電源供給装置を提供するこ
とを目的とする。Therefore, an object of the present invention is to provide a remote sense type power supply device capable of detecting a disconnection of a power supply line or a voltage detection line and interrupting or reducing the power supply to a load.
【００１７】[0017]
【課題を解決するための手段】本発明のリモートセンス
式電源供給装置は、電源装置から給電線を介して負荷へ
給電し、負荷の両端から電源装置に電圧検出線を接続
し、電圧検出線を介して検出した負荷の両端の電圧に基
づいて、負荷に供給する電圧を電源装置がフィードバッ
ク制御するものである。A remote sense type power supply device of the present invention supplies power from a power supply device to a load through a power supply line, connects voltage detection lines to the power supply device from both ends of the load, and detects the voltage detection line. The power supply device feedback-controls the voltage to be supplied to the load based on the voltage across the load detected via the.
【００１８】請求項１に係るリモートセンス式電源供給
装置は、電源装置の正極側給電線接続端子と電源装置の
正極側電圧検出線接続端子との間に少なくとも抵抗を接
続し、正極側電圧検出線を流れる電流を検出する電流検
出器を設け、正極側電圧検出線を流れる電流の向きが負
荷に流入する方向である場合、電源装置の動作を停止さ
せるか、または出力電圧を低減させる動作停止装置を備
えたことを特徴とする。In the remote sense type power supply device according to the first aspect, at least a resistor is connected between the positive electrode side power supply line connecting terminal of the power source device and the positive electrode side voltage detecting line connecting terminal of the power source device to detect the positive electrode side voltage. If a current detector that detects the current flowing through the line is provided and the direction of the current flowing through the positive voltage detection line is toward the load, stop the operation of the power supply device or stop the operation to reduce the output voltage. It is characterized by having a device.
【００１９】請求項２に係るリモートセンス式電源供給
装置は、電源装置の負極側給電線接続端子と電源装置の
負極側電圧検出線接続端子との間に少なくとも抵抗を接
続し、負極側電圧検出線を流れる電流を検出する電流検
出器を設け、負極側電圧検出線を流れる電流の向きが負
荷から流出する方向である場合、電源装置の動作を停止
させるか、または出力電圧を低減させる動作停止装置を
備えたことを特徴とする。According to another aspect of the remote sense type power supply device, at least a resistor is connected between the negative electrode side power supply line connecting terminal of the power source device and the negative electrode side voltage detecting line connecting terminal of the power source device to detect the negative side voltage. A current detector that detects the current flowing through the line is provided, and if the direction of the current flowing through the negative voltage detection line is in the direction that flows out from the load, stop the operation of the power supply device or stop the operation to reduce the output voltage. It is characterized by having a device.
【００２０】例えば、請求項１及び請求項２に係る発明
を同時に実施する場合、リモートセンス式電源供給装置
は、正極側給電線接続端子及び正極側電圧検出線接続端
子間に少なくとも抵抗を接続すると共に、負極側給電線
接続端子及び負極側電圧検出線接続端子間に少なくとも
抵抗を接続する構成となる。各抵抗の抵抗値は、給電線
の抵抗値よりも大きく設定する。For example, when the inventions according to claims 1 and 2 are carried out at the same time, in the remote sense type power supply device, at least a resistor is connected between the positive electrode side power supply line connection terminal and the positive electrode side voltage detection line connection terminal. At the same time, at least a resistor is connected between the negative electrode side power supply line connection terminal and the negative electrode side voltage detection line connection terminal. The resistance value of each resistor is set to be larger than the resistance value of the power supply line.
【００２１】この構成において、正極側給電線が断線す
ると、抵抗−電圧検出線（リモートセンス線）を介して
負荷へ電流が流れる。正極側電圧検出線の電流を検出す
る電流検出器によって、負荷へ向けて流れる電流が検出
されると、動作停止装置は、電源装置の動作を停止させ
る。なお、正極側電圧検出線の電流の向きが負荷側から
電源装置側へ流れ込む方向であることを検出すること
で、正極側電圧検出線が断線していないことを確認でき
る。また、正極側電圧検出線に電流が流れていないこと
に基づいて、正極側電圧検出線の断線を検出できる。In this configuration, when the positive electrode side power supply line is disconnected, current flows to the load via the resistance-voltage detection line (remote sense line). When the current detector that detects the current of the positive voltage detection line detects the current flowing toward the load, the operation stop device stops the operation of the power supply device. It is possible to confirm that the positive voltage detection line is not broken by detecting that the current direction of the positive voltage detection line is from the load side to the power supply side. Further, the disconnection of the positive electrode side voltage detection line can be detected based on the fact that no current flows in the positive electrode side voltage detection line.
【００２２】負極側給電線が断線すると、負荷から負極
側電圧検出線（リモートセンス線）−抵抗を介して電流
が流れる。負極側電圧検出線の電流を検出する電流検出
器によって、負荷側から電源装置に流れ込む方向の電流
が検出されると、動作停止装置は、電源装置の動作を停
止させる。なお、負極側電圧検出線の電流の向きが電源
装置側から負荷側へ流れ出す方向であることを検出する
ことで、負極側電圧検出線が断線していないことを確認
できる。また、負極側電圧検出線に電流が流れていない
ことに基づいて、負極側電圧検出線の断線を検出でき
る。When the power supply line on the negative electrode side is disconnected, current flows from the load through the voltage detection line on the negative electrode side (remote sense line) and the resistor. When the current detector that detects the current of the negative voltage detection line detects the current flowing from the load side to the power supply device, the operation stop device stops the operation of the power supply device. It is possible to confirm that the negative voltage detection line is not broken by detecting that the direction of the current of the negative voltage detection line is from the power supply side to the load side. Further, the disconnection of the negative voltage detection line can be detected based on the fact that no current flows in the negative voltage detection line.
【００２３】[0023]
【発明の実施の形態】以下、図面を用いて本発明の実施
の形態を説明する。図１は、本発明のリモートセンス式
電源供給装置のブロック構成図である。本実施形態は、
請求項１及び請求項２に対応する。図において、リモー
トセンス式電源供給装置５１の電源装置５２は、電力変
換部６と、アイソレート部７と、制御部２８と、電圧検
出部２９と、負荷電圧検出用抵抗Ｒ０とからなる。制御
部８と電圧検出部２９とで請求項に記載した動作停止装
置を構成している。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a remote sense type power supply device of the present invention. In this embodiment,
It corresponds to claim 1 and claim 2. In the figure, the power supply device 52 of the remote sense power supply device 51 includes a power conversion unit 6, an isolation unit 7, a control unit 28, a voltage detection unit 29, and a load voltage detection resistor R0. The control unit 8 and the voltage detection unit 29 constitute the operation stopping device described in the claims.
【００２４】電源装置２の正極側給電線接続端子（正極
側出力端子）２ａと負荷３の正極側受電端子３ａとを正
極側給電線４ａで接続し、電源装置２の負極側給電線接
続端子（負極側出力端子）２ｂと負荷３の負極側受電端
子３ｂとを負極側給電線４ｂで接続することで、各給電
線２ａ、３ａを介して電源装置２から負荷３へ電力が供
給される。The positive electrode side power supply line connecting terminal (positive electrode side output terminal) 2a of the power supply device 2 and the positive electrode side power receiving terminal 3a of the load 3 are connected by the positive electrode side power supply line 4a, and the negative electrode side power supply line connecting terminal of the power supply device 2 is connected. By connecting the (negative side output terminal) 2b and the negative side power receiving terminal 3b of the load 3 with the negative side power supply line 4b, power is supplied from the power supply device 2 to the load 3 via the respective power supply lines 2a and 3a. .
【００２５】また、正極側受電端子３ａと正極側電圧検
出線接続端子２ｃとを正極側電圧検出線（リモートセン
ス線）５ａで接続し、負極側受電端子３ｂと負極側電圧
検出線接続端子２ｄとを負極側電圧検出線５ｂで接続す
る。これにより、電源装置５２は、電圧検出線５ａ、５
ｂを介して負荷３の電圧を検出して、負荷３の電圧をフ
ィードバック制御できる。The positive side power receiving terminal 3a and the positive side voltage detecting line connecting terminal 2c are connected by a positive side voltage detecting line (remote sense line) 5a, and the negative side receiving terminal 3b and the negative side voltage detecting line connecting terminal 2d. And are connected by the negative voltage detection line 5b. As a result, the power supply device 52 causes the voltage detection lines 5 a, 5
It is possible to detect the voltage of the load 3 via b and perform feedback control of the voltage of the load 3.
【００２６】負荷電圧検出用抵抗Ｒ０は、各電圧検出端
子２ｃ、２ｄ間に接続されている。負荷電圧検出用抵抗
Ｒ０の抵抗値は、電圧検出線５ａ、５ｂの抵抗値よりも
充分に大きな値に設定している。これにより、電圧検出
線５ａ、５ｂによる電圧降下の影響を小さくして、負荷
３の両端電圧を正確に検出できるようにしている。The load voltage detecting resistor R0 is connected between the voltage detecting terminals 2c and 2d. The resistance value of the load voltage detection resistor R0 is set to a value sufficiently larger than the resistance values of the voltage detection lines 5a and 5b. As a result, the influence of the voltage drop due to the voltage detection lines 5a and 5b is reduced, and the voltage across the load 3 can be accurately detected.
【００２７】電圧検出部２９は、負荷電圧検出用抵抗Ｒ
０の両端電圧と基準電圧ＶＳとの差電圧に対応した誤差
信号２９ａを出力する。また、電圧検出部２９は、負荷
電圧検出用抵抗Ｒ０の両端電圧が下限電圧ＶＵ以下に低
下した場合に電圧低下検出信号２９ｂを出力し、負荷電
圧検出用抵抗Ｒ０の両端電圧が上限電圧ＶＯを超えた場
合に過電圧検出信号２９ｃを出力する。The voltage detecting section 29 includes a load voltage detecting resistor R.
The error signal 29a corresponding to the difference voltage between the voltage between both ends of 0 and the reference voltage VS is output. Further, the voltage detection unit 29 outputs a voltage drop detection signal 29b when the voltage across the load voltage detection resistor R0 drops below the lower limit voltage VU, and the voltage across the load voltage detection resistor R0 reaches the upper limit voltage VO. When it exceeds, the overvoltage detection signal 29c is output.
【００２８】制御部２８は、断線検出信号ＤＳ、電圧低
下検出信号２９ｂまたは過電圧検出信号２９ｃが供給さ
れた場合、スイッチング制御信号８ａの出力を停止し
て、電力変換部６の動作を停止させる。通常運転状態に
おいて、制御部２８は、誤差信号２９ａに基づいてスイ
ッチング制御信号８ａの周期、デューティを可変するこ
とで、負荷３に供給する電圧をフィードバック制御す
る。When the disconnection detection signal DS, the voltage drop detection signal 29b or the overvoltage detection signal 29c is supplied, the control unit 28 stops the output of the switching control signal 8a and stops the operation of the power conversion unit 6. In the normal operating state, the control unit 28 feedback-controls the voltage supplied to the load 3 by varying the cycle and duty of the switching control signal 8a based on the error signal 29a.
【００２９】このスイッチング制御信号（ＰＷＭ信号）
８ａは、アイソレート部７（パルストランス等を有す
る）を介して、後述する電力変換部６の電力用スイッチ
ング素子Ｑの制御電極（ベース、ゲート等）へ供給され
る。This switching control signal (PWM signal)
8a is supplied to the control electrode (base, gate, etc.) of the power switching element Q of the power conversion unit 6 described later via the isolation unit 7 (having a pulse transformer etc.).
【００３０】電力変換部６は、出力トランス（高周波ト
ランス）Ｔと、電力用スイッチング素子（トランジス
タ、ＦＥＴ等）Ｑと、整流用ダイオードＤと、電源安定
化用コンデンサＣとを備える。また、電力変換部６は、
負極側出力（負極側給電線接続端子２ｂ）をグランドと
している。電力変換部６は、電源入力端子２ｅ、２ｆに
供給される電力供給用直流電源（図示せず）から電力の
供給を受け、電圧変換を行なって負荷３へ電力を供給す
る。電力供給用直流電源は、商用電源を整流・平滑して
直流電源を供給する構成であってもよい。The power converter 6 includes an output transformer (high frequency transformer) T, a power switching element (transistor, FET, etc.) Q, a rectifying diode D, and a power source stabilizing capacitor C. In addition, the power conversion unit 6 is
The negative electrode side output (negative electrode side power supply line connecting terminal 2b) is grounded. The power conversion unit 6 receives supply of power from a power supply DC power supply (not shown) supplied to the power supply input terminals 2e and 2f, performs voltage conversion, and supplies power to the load 3. The DC power supply for power supply may be configured to rectify and smooth a commercial power supply to supply the DC power.
【００３１】電力変換部６は、前記したスイッチング制
御信号８ａに基づいて電力用スイッチング素子Ｑをスイ
ッチング動作させて、電力供給用直流電源から出力トラ
ンス（高周波トランス）Ｔの１次巻線を介して流れる電
流をスイッチングさせる。これにより、電力変換部６
は、出力トランスＴの２次巻線に誘起された交流電力を
整流用ダイオードＤで整流し、電源安定化用コンデンサ
Ｃで平滑して安定化した直流電源を出力する。なお、本
実施形態では、電源装置５２としてスイッチング型レギ
ュレータのものを例示しているが、ドロッパ型レギュレ
ータのものでもよい。The power converter 6 causes the power switching element Q to perform a switching operation based on the above-mentioned switching control signal 8a, and from the power supply DC power supply through the primary winding of the output transformer (high frequency transformer) T. Switching the flowing current. As a result, the power conversion unit 6
Rectifies the AC power induced in the secondary winding of the output transformer T with a rectifying diode D and smoothes it with a power source stabilizing capacitor C to output a stabilized DC power source. In this embodiment, the switching type regulator is used as the power supply device 52, but a dropper type regulator may be used.
【００３２】電源装置５２は、電圧検出線５ａ、５ｂを
流れる電流を電流検出器５３、５４で検出する。断線検
出部５５は、電圧検出線５ａ、５ｂを流れる電流の有無
ならびに電流の流れる方向に基づいて、給電４ａ、４ｂ
の断線ならびに電圧検出線５ａ、５ｂの断線を検出す
る。In the power supply device 52, the currents flowing through the voltage detection lines 5a and 5b are detected by the current detectors 53 and 54. The disconnection detection unit 55 determines whether or not the current flows through the voltage detection lines 5a and 5b and the direction in which the current flows.
And the voltage detection lines 5a and 5b are detected.
【００３３】一方の電流検出器５３は、抵抗３１と負荷
電圧検出用抵抗Ｒ０との接続点と正極側電圧検出線接続
端子２ｃとの間に設けている。他方の電流検出器５４
は、抵抗３２と負荷電圧検出用抵抗Ｒ０との接続点と負
極側電圧検出線接続端子２ｄとの間に設けている。各電
流検出器５３、５４は、ホール素子とホール素子の出力
電圧を増幅する増幅器とを備え、電流の向きの応じた極
性で電流の大きさに応じた電圧の出力を発生するものを
用いている。なお、本実施形態では、導線を切断するこ
となく導線を流れる電流を検出する電流検出器を示した
が、電流検出箇所に電流検出用抵抗を介設し、電流検出
用抵抗の両端に発生する電圧とその極性に基づいて電流
の大きさならびに電流の向きを検出する構成としてもよ
い。The one current detector 53 is provided between the connection point of the resistor 31 and the load voltage detection resistor R0 and the positive electrode side voltage detection line connection terminal 2c. The other current detector 54
Is provided between the connection point between the resistor 32 and the load voltage detection resistor R0 and the negative voltage detection line connection terminal 2d. Each of the current detectors 53 and 54 includes a Hall element and an amplifier that amplifies the output voltage of the Hall element, and uses one that generates a voltage output according to the magnitude of the current with a polarity according to the direction of the current. There is. In the present embodiment, the current detector that detects the current flowing through the conductor without cutting the conductor has been shown, but a current detecting resistor is provided at the current detecting location, and it occurs at both ends of the current detecting resistor. The configuration may be such that the magnitude of the current and the direction of the current are detected based on the voltage and its polarity.
【００３４】次に、本実施形態のリモートセンス式電源
供給装置５１による、断線時の動作説明をする。正極側
給電線４ａが断線した場合、抵抗Ｒ３１−正極側電圧検
出線５ａ−負荷３の経路で正極側電圧検出線５ａに電流
が流れる。断線検出部５５は、電流検出器５３の検出出
力に基づいて、負荷３側へ流れ出す電流が予め設定した
給電線断線検出しきい値電流を超えたことを検出する
と、断線検出信号ＤＳを出力する。Next, the operation of the remote sense type power supply device 51 of the present embodiment at the time of disconnection will be described. When the positive electrode side power supply line 4a is disconnected, a current flows through the positive electrode side voltage detection line 5a through the route of the resistor R31, the positive electrode side voltage detection line 5a, and the load 3. The disconnection detection unit 55 outputs a disconnection detection signal DS when it detects that the current flowing out to the load 3 side exceeds a preset power supply line disconnection detection threshold current, based on the detection output of the current detector 53. .
【００３５】同様に、負極側給電線４ｂが断線した場
合、負荷−負極側電圧検出線５ｂ−抵抗Ｒ３２の経路で
負荷−負極側電圧検出線５ｂに電流が流れる。断線検出
部５５は、電流検出器５４の検出出力に基づいて、負荷
３側から流れ込む電流が予め設定した給電線断線検出し
きい値電流を超えたことを検出すると、断線検出信号Ｄ
Ｓを出力する。Similarly, when the negative electrode side power supply line 4b is disconnected, a current flows through the load-negative electrode side voltage detection line 5b-resistor R32 to the load-negative electrode side voltage detection line 5b. When the disconnection detection unit 55 detects that the current flowing from the load 3 side exceeds a preset power supply line disconnection detection threshold current based on the detection output of the current detector 54, the disconnection detection signal D
Output S.
【００３６】正極側電圧検出線５ａが断線した場合、正
極側電圧検出線５ａに電流は流れない。断線検出部５５
は、電流検出器５３の検出出力に基づいて、正極側電圧
検出線５ａを流れる電流が予め設定した電圧検出線断線
検出しきい値電流以下になったことを検出すると、断線
検出信号ＤＳを出力する。When the positive voltage detection line 5a is broken, no current flows through the positive voltage detection line 5a. Disconnection detection unit 55
Outputs a disconnection detection signal DS when it detects that the current flowing through the positive electrode side voltage detection line 5a becomes equal to or lower than a preset voltage detection line disconnection detection threshold current based on the detection output of the current detector 53. To do.
【００３７】同様に、負極側電圧検出線５ｂが断線した
場合、負極側電圧検出線５ｂに電流は流れなくなる。従
って、この場合、断線検出部５５は、電流検出器５４の
検出出力に基づいて、負極側電圧検出線５ｂを流れる電
流が予め設定した電圧検出線断線検出しきい値電流以下
になったことを検出すると、断線検出信号ＤＳを出力す
る。Similarly, when the negative voltage detection line 5b is broken, no current flows through the negative voltage detection line 5b. Therefore, in this case, the disconnection detection unit 55 confirms that the current flowing through the negative electrode side voltage detection line 5b becomes equal to or lower than the preset voltage detection line disconnection detection threshold current based on the detection output of the current detector 54. Upon detection, the disconnection detection signal DS is output.
【００３８】制御部２８は、断線検出信号ＤＳが供給さ
れるとスイッチング制御信号８ａの出力を停止して電力
変換部６の動作を停止させるので、給電線４ａ、４ｂが
断線している場合、または、電圧検出線５ａ、５ｂが断
線している場合、負荷３への給電が停止される。When the disconnection detection signal DS is supplied, the control unit 28 stops the output of the switching control signal 8a and stops the operation of the power conversion unit 6. Therefore, when the power supply lines 4a and 4b are disconnected, Alternatively, when the voltage detection lines 5a and 5b are broken, the power supply to the load 3 is stopped.
【００３９】[0039]
【発明の効果】本発明のリモートセンス式電源供給装置
は、給電線ならびに電圧検出線の断線を検出して、電源
装置の動作を停止させたり、出力電圧を低減させる構成
とした。このため、給電線ならびに電圧検出線が正常に
接続されていない状態で、負荷に電力供給がされること
を防止できる。即ち、電源装置ならびに負荷を保護でき
る。また、給電線が断線した際に、電圧検出線に大電流
が流れることを防止できる。さらに、電圧検出線の断線
に伴って負荷に所望しない電圧が供給されることを防止
できる。The remote sense type power supply device of the present invention is configured to detect the disconnection of the power supply line and the voltage detection line to stop the operation of the power supply device or reduce the output voltage. Therefore, power can be prevented from being supplied to the load when the power supply line and the voltage detection line are not normally connected. That is, the power supply device and the load can be protected. Further, it is possible to prevent a large current from flowing through the voltage detection line when the power supply line is broken. Furthermore, it is possible to prevent an undesired voltage from being supplied to the load due to the disconnection of the voltage detection line.
【図１】本発明のリモートセンス式電源供給装置のブロ
ック構成図である。FIG. 1 is a block configuration diagram of a remote sense type power supply device of the present invention.
【図２】従来のリモートセンス式電源供給装置のブロッ
ク構成図である。FIG. 2 is a block configuration diagram of a conventional remote sense type power supply device.
【図３】従来の他のリモートセンス式電源供給装置のブ
ロック構成図である。FIG. 3 is a block diagram of another conventional remote sense type power supply device.
１、５１ リモートセンス式電源供給装置 ２、５２ 電源装置 ２ａ 正極側給電線接続端子 ２ｂ 負極側給電線接続端子 ２ｃ 正極側電圧検出線接続端子 ２ｄ 負極側電圧検出線接続端子 ２ｅ、２ｆ 電源入力端子 ３ 負荷 ３ａ 正極側受電端子 ３ｂ 負極側受電端子 ４ａ 正極側給電線 ４ｂ 負極側給電線 ５ａ 正極側電圧検出線 ５ｂ 負極側電圧検出線 ６ 電力変換部 ７ アイソレート部 ２８ 制御部 ２９ 電圧検出部 ５３、５４ 電流検出器 ５５ 断線検出部 Ｄ 整流用ダイオード Ｑ 電力用スイッチング素子 Ｒ０ 負荷電圧検出用抵抗 Ｒ１、Ｒ２ 電流制限用抵抗 Ｒ３１、Ｒ３２、Ｒ８１、Ｒ８２ 抵抗 Ｒ５１、Ｒ５２ 保護抵抗 Ｔ 出力トランス ＴＰ１ 正極側の電源出力端子 ＴＰ２ 負極側の電源出力端子 ＴＳ１ 正極側の電圧検出端子 ＴＳ２ 負極側の電圧検出端子 1,51 Remote sense power supply device 2,52 power supply 2a Positive side power supply line connection terminal 2b Negative electrode side power supply line connection terminal 2c Positive voltage detection line connection terminal 2d Negative electrode side voltage detection line connection terminal 2e, 2f Power input terminal 3 load 3a Positive side power receiving terminal 3b Negative electrode side power receiving terminal 4a Positive side power supply line 4b Negative side power supply line 5a Positive voltage detection line 5b Negative side voltage detection line 6 Power converter 7 Isolation section 28 Control unit 29 Voltage detector 53, 54 Current detector 55 Disconnection detector D rectifying diode Q Power switching element R0 load voltage detection resistor R1, R2 Current limiting resistor R31, R32, R81, R82 resistance R51, R52 Protection resistor T output transformer TP1 Positive power supply output terminal TP2 Power supply output terminal on the negative side TS1 Positive voltage detection terminal TS2 Voltage detection terminal on the negative side
フロントページの続き Ｆターム(参考） 2G014 AA02 AB29 AC07 5G004 AA04 AB02 BA05 DA02 DC04 5H730 AA20 AS01 BB23 DD02 DD32 EE02 EE07 FD01 FD51 FF16 FF18 FG05 XX09 XX11 XX29 XX35 XX43 Continued front page F term (reference) 2G014 AA02 AB29 AC07 5G004 AA04 AB02 BA05 DA02 DC04 5H730 AA20 AS01 BB23 DD02 DD32 EE02 EE07 FD01 FD51 FF16 FF18 FG05 XX09 XX11 XX29 XX35 XX43
Claims (2)
し、前記負荷の両端から前記電源装置に電圧検出線を接
続し、前記電源装置は前記電圧検出線を介して検出した
前記負荷の両端の電圧に基づいて前記負荷に供給する電
圧をフィードバック制御するリモートセンス式電源供給
装置において、 前記電源装置の正極側給電線接続端子と前記電源装置の
正極側電圧検出線接続端子との間に少なくとも抵抗を接
続し、 正極側電圧検出線を流れる電流を検出する電流検出器を
設け、 前記正極側電圧検出線を流れる電流の向きが前記負荷に
流入する方向である場合、前記電源装置の動作を停止さ
せるか、または出力電圧を低減させる動作停止装置を備
えたことを特徴とするリモートセンス式電源供給装置。1. A power supply device supplies power to a load via a power supply line, a voltage detection line is connected to the power supply device from both ends of the load, and the power supply device detects a load of the load detected through the voltage detection line. In a remote sense type power supply device that feedback-controls the voltage supplied to the load based on the voltage between both ends, between a positive-side power supply line connection terminal of the power supply device and a positive-side voltage detection line connection terminal of the power supply device. When at least a resistor is connected and a current detector that detects a current flowing through the positive voltage detection line is provided, and the direction of the current flowing through the positive voltage detection line is in the direction of flowing into the load, the operation of the power supply device A remote sense type power supply device characterized by comprising an operation stopping device for stopping the operation or reducing the output voltage.
し、前記負荷の両端から前記電源装置に電圧検出線を接
続し、前記電源装置は前記電圧検出線を介して検出した
前記負荷の両端の電圧に基づいて前記負荷に供給する電
圧をフィードバック制御するリモートセンス式電源供給
装置において、 前記電源装置の負極側給電線接続端子と前記電源装置の
負極側電圧検出線接続端子との間に少なくとも抵抗を接
続し、 負極側電圧検出線を流れる電流を検出する電流検出器を
設け、 前記負極側電圧検出線を流れる電流の向きが前記負荷か
ら流出する方向である場合、前記電源装置の動作を停止
させるか、または出力電圧を低減させる動作停止装置を
備えたことを特徴とするリモートセンス式電源供給装
置。2. A power supply device supplies power to a load through a power supply line, and a voltage detection line is connected to the power supply device from both ends of the load, and the power supply device detects the load detected by the voltage detection line. In a remote sense type power supply device that feedback-controls the voltage supplied to the load based on the voltage between both ends, between the negative-side power supply line connection terminal of the power supply device and the negative-side voltage detection line connection terminal of the power supply device. When at least a resistor is connected and a current detector for detecting a current flowing through the negative voltage detection line is provided, and the direction of the current flowing through the negative voltage detection line is in the direction of flowing out from the load, the operation of the power supply device A remote sense type power supply device characterized by comprising an operation stopping device for stopping the operation or reducing the output voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003012704A JP3706616B2 (en) | 2003-01-21 | 2003-01-21 | Remote sense type power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003012704A JP3706616B2 (en) | 2003-01-21 | 2003-01-21 | Remote sense type power supply device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02536198A Division JP3406215B2 (en) | 1998-02-06 | 1998-02-06 | Remote sense type power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003274655A true JP2003274655A (en) | 2003-09-26 |
| JP3706616B2 JP3706616B2 (en) | 2005-10-12 |
Family
ID=29208353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003012704A Expired - Fee Related JP3706616B2 (en) | 2003-01-21 | 2003-01-21 | Remote sense type power supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3706616B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007156734A (en) * | 2005-12-02 | 2007-06-21 | Matsushita Electric Works Ltd | Detection system |
| JP2016021828A (en) * | 2014-07-15 | 2016-02-04 | Fdk株式会社 | Power supply unit |
| US11635795B2 (en) | 2019-08-07 | 2023-04-25 | Denso Corporation | Power supply system and power supplying method for detecting a short circuit in the feedback |
-
2003
- 2003-01-21 JP JP2003012704A patent/JP3706616B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007156734A (en) * | 2005-12-02 | 2007-06-21 | Matsushita Electric Works Ltd | Detection system |
| JP4645430B2 (en) * | 2005-12-02 | 2011-03-09 | パナソニック電工株式会社 | Detection system |
| JP2016021828A (en) * | 2014-07-15 | 2016-02-04 | Fdk株式会社 | Power supply unit |
| US11635795B2 (en) | 2019-08-07 | 2023-04-25 | Denso Corporation | Power supply system and power supplying method for detecting a short circuit in the feedback |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3706616B2 (en) | 2005-10-12 |
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