JP3593027B2 - High voltage switch circuit failure detection device - Google Patents

High voltage switch circuit failure detection device Download PDF

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Publication number
JP3593027B2
JP3593027B2 JP2000380736A JP2000380736A JP3593027B2 JP 3593027 B2 JP3593027 B2 JP 3593027B2 JP 2000380736 A JP2000380736 A JP 2000380736A JP 2000380736 A JP2000380736 A JP 2000380736A JP 3593027 B2 JP3593027 B2 JP 3593027B2
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stage
abnormality
voltage
power supply
output
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JP2002186170A (en
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秀泰 石原
慎輔 藤井
一裕 向井
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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【０００１】
【発明の属する技術分野】
この発明は、高電圧をスイッチングする高電圧スイッチ回路の故障検出装置に関する。
【０００２】
【従来の技術】
図２は、従来の高電圧スイッチ回路の故障検出装置を示す回路図である。
図２において、Ｓ１〜ＳｎはそれぞれＦＥＴにより構成された各段のスイッチである。１は１段目のスイッチＳ１の状態を示すＬＥＤ、２は１段目のスイッチＳ１への入力電源異常を検出するフォトカプラ、３は２段目のスイッチＳ２の状態を示すＬＥＤ、４は２段目のスイッチＳ２への入力電源異常を検出するフォトカプラである。５は最終段のスイッチＳｎへの入力電源異常を検出するフォトカプラ、６は入力電源異常の検出を受けて、制御用電源を制御するフォトカプラからなる検出制御回路である。７は各スイッチＳ１〜Ｓｎをドライブするドライバ回路である。８は直流電源で、電源電圧Ｖｃｃ１をドライバ回路７に供給する。９は各スイッチＳ１〜Ｓｎに並列に接続されたスナバ回路である。
【０００３】
次に、動作について示す。
スイッチＳ１〜Ｓｎが正常な場合、各スイッチＳ１〜Ｓｎは、各段のドライバ回路７により同時にＯＮ／ＯＦＦする。各段のスイッチには、それぞれ並列にスナバ回路９が接続されており、スナバ回路９のＣＲ両端電圧は、スイッチ分担電圧に相当する直流電圧となる。ＬＥＤ１は、スナバ回路９のコンデンサより抵抗を介して接続されており、スイッチＳ１が正常の場合は点灯している。しかしスイッチＳ１がショートモードで異常となった場合、スナバ電圧はゼロとなり、ＬＥＤ１は消灯することとなる。従って、ＬＥＤ１の状態を監視することにより、スイッチＳ１の回路が故障していることが分かる。同様に、ＬＥＤ３の状態を監視することにより、スイッチＳ２の回路が故障していることが分かる。
【０００４】
一方、トランスＴ１は、各段のドライバ回路７及び故障検出回路に高電圧に浮いた電源を供給する。入力電源が正常に動作していれば、フォトカプラ２の光ダイオートが動作し、フォトカプラ２の出力はローレベルとなる。そしてフォトカプラ４の光ダイオードに電流が流れ、フォトカプラ４の光ダイオードを動作させる。その結果を、次段の検出回路の光ダイオードのカソードに接続しておけば、順次各段の光ダイオードを動作させ、その結果を、最終的にフォトカプラ５及び検出制御回路６で検出することにより、スイッチへの入力電源の異常検出を行うことができる。ここで、仮に２段目の電源に異常があるとすると、１段目の光ダイオードは動作するが、２段目の検出側には電源が供給されないため、検出側のフォトカプラの光ダイオードに電流が流れないので、２段目の光ダイオードは動作しない。一段でも異常があって光ダイオードが動作しないと、その後のフォトカプラは、シリーズに接続されているので動作しない。このように最終段のフォトカプラ５の出力を、検出制御回路６で検出することにより、異常か正常か判断できる。
【０００５】
【発明が解決しようとする課題】
従来の技術は、スイッチ素子を動作するための電源の異常のみ検出を行っており、高電圧スイッチ素子自体の異常に対しては、ＬＥＤの点灯状態を人が判断していた。
【０００６】
この発明は、上述のような課題を解決するためになされたものであり、高電圧スイッチの異常を検出する回路と、高電圧スイッチへの入力電源の異常を検出する検出回路を一つにまとめることにより、一つの回路でスイッチの異常及び入力電源異常を検出し、高電圧電源の制御を行うことができる高電圧スイッチ回路の故障検出装置を得ることを目的としている。
【０００７】
【課題を解決するための手段】
この発明に係わる高電圧スイッチ回路の故障検出装置においては、高電圧をスイッチングするスイッチ素子が多段に接続された高電圧スイッチ回路の故障を検出する高電圧スイッチ回路の故障検出装置において、スイッチ素子に並列に接続されたスナバ回路、各段毎に設けられ、自段のスナバ回路電圧が入力されると共に、次段のスイッチ素子の制御に用いられる制御用電源電圧が入力されるフォトカプラを有する第一の検出手段を備え、第一の検出手段のフォトカプラには、前段の第一の検出手段の出力が入力され、第一の検出手段は、スナバ回路電圧及び次段の制御用電源電圧及び前段の第一の検出手段の出力の異常を出力に反映させるものである。
また、第一の検出手段によって異常が検出される制御用電源電圧は、各段毎に形成されているものである。
【０００８】
さらに、最終段の第一の検出手段の出力により異常を判定する第二の検出手段を備え、第二の検出手段は、異常を判定したとき、制御用電源を制御する信号を出力するものである。
【０００９】
また、第一段のスイッチ素子の制御に用いられる制御用電源電圧の入力に応じて導通し、この導通時にはドレイン電位を接地電位にするＦＥＴを有する第三の検出手段を備え、第三の検出手段のＦＥＴのドレイン電位は、第一段の第一の検出手段のフォトカプラに出力され、第一段の第一の検出手段は、第三の検出手段の出力の異常を出力に反映させるものである。
【００１０】
【発明の実施の形態】
実施の形態１．
図１は、この発明の実施の形態１による高電圧スイッチ回路の故障検出装置を示す回路図である。
図１において、Ｓ１〜ＳｎはそれぞれＦＥＴにより構成された各段のスイッチである。１は１段目のスイッチＳ１の状態を示すＬＥＤ、２は１段目のスイッチＳ１の故障及びスイッチＳ１への入力電源異常を検出するフォトカプラ（第一の検出手段）、３は２段目のスイッチＳ２の状態を示すＬＥＤ、４は２段目のスイッチＳ２の故障及びスイッチＳ２への入力電源異常を検出するフォトカプラである。５は最終段のスイッチＳｎの故障及びスイッチＳｎへの入力電源異常を検出するフォトカプラ、６は各段のスイッチの故障または入力電源異常の検出を受けて、電源を制御するフォトカプラからなる検出制御回路（第二の検出手段）で、異常を検出したとき、制御用電源を制御する信号を出力する。７は各スイッチＳ１〜Ｓｎをドライブするドライバ回路で、各段毎に設けられている。８は各段毎に設けられた直流電源で、電源電圧Ｖｃｃ１をドライバ回路７に供給する。９は各スイッチＳ１〜Ｓｎに並列に接続されたスナバ回路である。１０はソースが接地され、電源電圧の入力によって制御されるＦＥＴによって構成され、１段目の高電圧スイッチの入力電源異常を検出する検出回路（第三の検出手段）、１１は各段のＬＥＤに接続されたツエナダイオードで、入力電源異常を検出する回路に安定した電圧を供給するために設けられる。
【００１１】
なお、フォトカプラ２には、自段のスナバ回路９が抵抗を介して接続され、検出回路１０の出力及び次段の電源電圧が入力され、フォトカプラ２の出力には、それらの異常を反映するように構成されている。また、フォトカプラ４には、フォトカプラ２と同様に自段のスナバ回路９が抵抗を介して接続され、次段の電源電圧とフォトカプラ２の出力が入力され、フォトカプラ４の出力は、それらの入力の異常が反映されるように構成されている。このように順次、前段のフォトカプラの出力を受けるようにフォトカプラが接続される。
【００１２】
次に、動作について説明する。
スイッチ全体に高電圧が印加されると、スイッチＳ１〜Ｓｎが正常の場合、スナバ回路９には分担電圧が印加される。低電圧電源をスナバ回路に抵抗分圧回路を接続して作る。またトランスＴ１は、各段のドライバ回路７及び検出回路に高電圧に浮いた電源を供給する。ドライバ回路７は、各スイッチ素子のソース電位を基準電位として、それよりスイッチ素子を動作させることができる電位分浮いた電位を、スイッチ素子のゲートに供給するように構成されている。
【００１３】
検出回路１０には、電源電圧ＶＣＣ１が供給され、検出回路１０のＦＥＴスイッチがオン状態となると、検出回路１０のＦＥＴのドレイン電位は下がり、フォトカプラ２の光ダイオードに電流が流れ、フォトカプラ２の出力回路が動作する。フォトカプラ２の出力はローレベルとなり、２段目のフォトカプラ４の光ダイオードに電流が流れる。そこで２段目の高電圧スイッチＳ２と入力電源に異常がなければ、１段目と同様にＬＥＤ３とフォトカプラ４の光ダイオードが動作し、フォトカプラ４の出力はローレベルとなる。
【００１４】
もしも電源に異常がある場合は、従来の技術で述べたように、フォトカプラ４出力側の電源がなくなるため、異常状態を検出できる。逆に電源が正常で、スイッチＳ２がショートモードで異常となった場合、スナバ回路９の電圧は零となるため、たとえ電源が正常でもフォトカプラ４の出力は異常となる。各段のフォトカプラは、直列接続されているから最終段のフォトカプラ５出力も異常となる。このような回路を高電圧スイッチの各段に設けることにより、一段でもスイッチもしくは入力電源に異常があると異常が発生した段以降のフォトカプラは動作せず、次々に異常状態を伝達することになり、最終段のフォトカプラ５及び検出制御回路６で検出することにより、スイッチ素子の異常もしくは入力電源異常を一つの回路で検出することができる。
【００１５】
実施の形態１によれば、一回路でスイッチ素子及び高電圧電源の異常検出ができ、高電圧電源のオフ等の制御が行える。
【００１６】
【発明の効果】
この発明は、以上説明したように構成されているので、以下に示すような効果を奏する。
高電圧をスイッチングするスイッチ素子が多段に接続された高電圧スイッチ回路の故障を検出する高電圧スイッチ回路の故障検出装置において、スイッチ素子に並列に接続されたスナバ回路、各段毎に設けられ、自段のスナバ回路電圧が入力されると共に、次段のスイッチ素子の制御に用いられる制御用電源電圧が入力されるフォトカプラを有する第一の検出手段を備え、第一の検出手段のフォトカプラには、前段の第一の検出手段の出力が入力され、第一の検出手段は、スナバ回路電圧及び次段の制御用電源電圧及び前段の第一の検出手段の出力の異常を出力に反映させるので、第一の検出手段のみで、スイッチ素子の故障と制御用電源電圧の異常を検出することができる。
【００１７】
また、第一の検出手段によって異常が検出される制御用電源電圧は、各段毎に形成されているもので、各段毎の制御用電源電圧の異常を検出することができる。
【００１８】
さらに、最終段の第一の検出手段の出力により異常を判定する第二の検出手段を備え、第二の検出手段は、異常を判定したとき、制御用電源を制御する信号を出力するので、異常時に制御用電源を制御することができる。
また、第一段のスイッチ素子の制御に用いられる制御用電源電圧の入力に応じて導通し、この導通時にはドレイン電位を接地電位にするＦＥＴを有する第三の検出手段を備え、第三の検出手段のＦＥＴのドレイン電位は、第一段の第一の検出手段のフォトカプラに出力され、第一段の第一の検出手段は、第三の検出手段の出力の異常を出力に反映させるので、第一段の第一の検出手段により、第一段のスイッチ素子の制御に用いられる制御用電源電圧の異常を検出することができる。
【図面の簡単な説明】
【図１】この発明の実施の形態１による高電圧スイッチ回路の故障検出装置を示す図である。
【図２】従来の高電圧スイッチ回路の故障検出装置を示す回路図である。
【符号の説明】
１，３ ＬＥＤ、２，４，５ フォトカプラ、６ 検出制御回路、
７ ドライバ回路、８ 直流電源、９ スナバ回路、１０ 検出回路、
１１ ツエナダイオード。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a failure detection device for a high-voltage switch circuit that switches a high voltage.
[0002]
[Prior art]
FIG. 2 is a circuit diagram showing a conventional failure detection device for a high-voltage switch circuit.
In FIG. 2, S1 to Sn are switches of each stage configured by FETs. Reference numeral 1 denotes an LED indicating the state of the first-stage switch S1, 2 denotes a photocoupler that detects an abnormality in the input power to the first-stage switch S1, 3 denotes an LED that indicates the state of the second-stage switch S2, and 4 denotes 2 This is a photocoupler that detects an abnormality in the input power to the switch S2 at the stage. Reference numeral 5 denotes a photocoupler for detecting an abnormality of the input power to the last switch Sn, and reference numeral 6 denotes a detection control circuit including a photocoupler for detecting the abnormality of the input power and controlling the control power. Reference numeral 7 denotes a driver circuit for driving each of the switches S1 to Sn. Reference numeral 8 denotes a DC power supply that supplies a power supply voltage Vcc1 to the driver circuit 7. Reference numeral 9 denotes a snubber circuit connected in parallel to each of the switches S1 to Sn.
[0003]
Next, the operation will be described.
When the switches S1 to Sn are normal, the switches S1 to Sn are simultaneously turned ON / OFF by the driver circuits 7 of the respective stages. A snubber circuit 9 is connected in parallel to each of the switches in each stage, and the voltage across the CR of the snubber circuit 9 is a DC voltage corresponding to the switch shared voltage. The LED 1 is connected via a resistor from the capacitor of the snubber circuit 9, and is lit when the switch S1 is normal. However, when the switch S1 becomes abnormal in the short mode, the snubber voltage becomes zero, and the LED1 is turned off. Therefore, by monitoring the state of LED1, it can be seen that the circuit of switch S1 has failed. Similarly, by monitoring the state of LED3, it can be seen that the circuit of switch S2 has failed.
[0004]
On the other hand, the transformer T1 supplies the power floating at a high voltage to the driver circuit 7 and the failure detection circuit of each stage. If the input power supply is operating normally, the optical dye auto of the photocoupler 2 operates, and the output of the photocoupler 2 becomes low level. Then, a current flows through the photodiode of the photocoupler 4 to operate the photodiode of the photocoupler 4. If the result is connected to the cathode of the photodiode of the detection circuit of the next stage, the photodiode of each stage is operated sequentially, and the result is finally detected by the photocoupler 5 and the detection control circuit 6. Accordingly, it is possible to detect the abnormality of the input power to the switch. Here, if there is an abnormality in the power supply of the second stage, the photodiode of the first stage operates, but power is not supplied to the detection side of the second stage. Since no current flows, the second-stage photodiode does not operate. If the photodiode does not operate due to any abnormality, the subsequent photocoupler does not operate because it is connected to the series. As described above, by detecting the output of the photocoupler 5 at the last stage by the detection control circuit 6, it can be determined whether the output is abnormal or normal.
[0005]
[Problems to be solved by the invention]
In the related art, only the abnormality of the power supply for operating the switch element is detected, and the person determines the lighting state of the LED for the abnormality of the high voltage switch element itself.
[0006]
The present invention has been made to solve the above-described problem, and integrates a circuit that detects an abnormality of a high-voltage switch and a detection circuit that detects an abnormality of an input power supply to the high-voltage switch. Accordingly, it is an object of the present invention to obtain a failure detection device for a high-voltage switch circuit that can detect a switch abnormality and an input power supply abnormality with one circuit and control the high-voltage power supply.
[0007]
[Means for Solving the Problems]
In the failure detection device for a high-voltage switch circuit according to the present invention, in the failure detection device for a high-voltage switch circuit that detects a failure in a high-voltage switch circuit in which switch devices that switch high voltages are connected in multiple stages , A snubber circuit connected in parallel, a photocoupler that is provided for each stage and has a snubber circuit voltage of its own stage and a photocoupler to which a control power supply voltage used for controlling a next-stage switch element is inputted . comprising a first detection means, the photocoupler of the first detecting means, the output of the first detecting means of the preceding stage is inputted, the first detecting means, a snubber circuit voltage and the supply voltage for the next stage of the control and An abnormality in the output of the first detection means in the preceding stage is reflected in the output .
The control power supply voltage at which an abnormality is detected by the first detection means is formed for each stage.
[0008]
Et al is provided with a second detecting means for determining abnormality by the output of the first detecting means at the last stage, the second detecting means, when it is judged abnormal, and outputs a signal for controlling the control power supply Things.
[0009]
Also provided is third detection means having an FET that conducts in response to the input of a control power supply voltage used for controlling the first-stage switch element and that sets the drain potential to the ground potential when the first stage is turned on. The drain potential of the FET of the means is output to the photocoupler of the first detection means of the first stage, and the first detection means of the first stage reflects the output abnormality of the third detection means in the output. der Ru.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a circuit diagram showing a failure detection device for a high-voltage switch circuit according to Embodiment 1 of the present invention.
In FIG. 1, S1 to Sn are switches of each stage constituted by FETs. Reference numeral 1 denotes an LED indicating the state of the first-stage switch S1, 2 denotes a photocoupler (first detection means) for detecting a failure of the first-stage switch S1 and abnormality of input power to the switch S1, and 3 denotes a second-stage switch. The LED 4, which indicates the state of the switch S2, is a photocoupler that detects a failure of the switch S2 in the second stage and an abnormality in the input power to the switch S2. Reference numeral 5 denotes a photocoupler for detecting a failure of the switch Sn in the last stage and abnormality of input power to the switch Sn. Reference numeral 6 denotes a photocoupler for controlling the power in response to detection of failure of the switch in each stage or abnormality of the input power. When the control circuit (second detecting means) detects an abnormality, it outputs a signal for controlling the control power supply. A driver circuit 7 drives each of the switches S1 to Sn, and is provided for each stage. Reference numeral 8 denotes a DC power supply provided for each stage, and supplies a power supply voltage Vcc1 to the driver circuit 7. Reference numeral 9 denotes a snubber circuit connected in parallel to each of the switches S1 to Sn. Reference numeral 10 denotes a detection circuit (third detection means) which is configured by an FET whose source is grounded and which is controlled by the input of the power supply voltage, which detects an input power supply abnormality of the first stage high voltage switch, and 11 denotes an LED of each stage. Is provided to supply a stable voltage to a circuit for detecting an abnormality in the input power supply.
[0011]
The photocoupler 2 is connected to a snubber circuit 9 of its own stage via a resistor, receives the output of the detection circuit 10 and the power supply voltage of the next stage, and reflects the abnormality in the output of the photocoupler 2. It is configured to Further, the snubber circuit 9 of the own stage is connected to the photocoupler 4 via a resistor similarly to the photocoupler 2, the power supply voltage of the next stage and the output of the photocoupler 2 are input, and the output of the photocoupler 4 is It is configured to reflect the abnormalities of those inputs. In this manner, the photocouplers are sequentially connected so as to receive the output of the preceding photocoupler.
[0012]
Next, the operation will be described.
When a high voltage is applied to the entire switch, the shared voltage is applied to the snubber circuit 9 when the switches S1 to Sn are normal. A low-voltage power supply is made by connecting a resistor divider circuit to a snubber circuit. Further, the transformer T1 supplies a power floating at a high voltage to the driver circuit 7 and the detection circuit of each stage. The driver circuit 7 is configured to supply, to the gate of the switch element, a potential that is higher than the source potential of each switch element by a potential that allows the switch element to operate.
[0013]
When the power supply voltage VCC1 is supplied to the detection circuit 10 and the FET switch of the detection circuit 10 is turned on, the drain potential of the FET of the detection circuit 10 decreases, a current flows through the photodiode of the photocoupler 2, and the photocoupler 2 Output circuit operates. The output of the photocoupler 2 becomes low level, and a current flows through the photodiode of the second-stage photocoupler 4. Therefore, if there is no abnormality in the second-stage high-voltage switch S2 and the input power supply, the LED 3 and the photodiode of the photocoupler 4 operate as in the first stage, and the output of the photocoupler 4 becomes low level.
[0014]
If there is an abnormality in the power supply, as described in the related art, the power supply on the output side of the photocoupler 4 disappears, so that an abnormal state can be detected. Conversely, when the power supply is normal and the switch S2 becomes abnormal in the short mode, the voltage of the snubber circuit 9 becomes zero, so that even if the power supply is normal, the output of the photocoupler 4 becomes abnormal. Since the photocouplers in each stage are connected in series, the output of the photocoupler 5 in the last stage also becomes abnormal. By providing such a circuit in each stage of the high-voltage switch, if there is an abnormality in the switch or the input power supply even in one stage, the photocoupler after the stage in which the abnormality occurs will not operate, and the abnormal state will be transmitted one after another. That is, by detecting with the photocoupler 5 and the detection control circuit 6 at the final stage, abnormality of the switch element or abnormality of the input power can be detected with one circuit.
[0015]
According to the first embodiment, abnormality of the switch element and the high-voltage power supply can be detected with one circuit, and control such as turning off the high-voltage power supply can be performed.
[0016]
【The invention's effect】
Since the present invention is configured as described above, it has the following effects.
In a failure detection device for a high-voltage switch circuit that detects a failure of a high-voltage switch circuit in which a switch element that switches a high voltage is connected in multiple stages, a snubber circuit connected in parallel to the switch element is provided for each stage, with snubber circuit voltage of the stage is entered, provided with a first detecting means including a photo coupler control power supply voltage used to control the next stage of the switching element is input, the photo of the first detecting means coupler , The output of the first detection means of the preceding stage is input, and the first detection means reflects in the output the abnormality of the snubber circuit voltage, the control power supply voltage of the next stage, and the output of the first detection means of the preceding stage. since make, only the first detection means can detect the abnormality of the failure and the control power supply voltage of the switching element.
[0017]
The control power supply voltage abnormality is detected by the first detecting means, those which are formed at each stage, Ru can be detected abnormality of the control power supply voltage for each stage.
[0018]
Furthermore, a second detection unit that determines an abnormality based on the output of the first detection unit in the final stage includes a second detection unit that outputs a signal for controlling the control power supply when the abnormality is determined. The control power supply can be controlled in the event of an abnormality.
Also provided is third detection means having an FET that conducts in response to the input of a control power supply voltage used for controlling the first-stage switch element and that sets the drain potential to the ground potential when the first stage is turned on. The drain potential of the FET of the means is output to the photocoupler of the first detection means of the first stage, and the first detection means of the first stage reflects the abnormality of the output of the third detection means in the output . The first detection means in the first stage can detect an abnormality in the control power supply voltage used for controlling the first-stage switch element .
[Brief description of the drawings]
FIG. 1 is a diagram showing a failure detection device for a high-voltage switch circuit according to a first embodiment of the present invention.
FIG. 2 is a circuit diagram showing a conventional failure detection device for a high-voltage switch circuit.
[Explanation of symbols]
1,3 LED, 2,4,5 photo coupler, 6 detection control circuit,
7 driver circuit, 8 DC power supply, 9 snubber circuit, 10 detection circuit,
11 Zener diode.

Claims (4)

高電圧をスイッチングするスイッチ素子が多段に接続された高電圧スイッチ回路の故障を検出する高電圧スイッチ回路の故障検出装置において、上記スイッチ素子に並列に接続されたスナバ回路、各段毎に設けられ、自段の上記スナバ回路電圧が入力されると共に、次段のスイッチ素子の制御に用いられる制御用電源電圧が入力されるフォトカプラを有する第一の検出手段を備え、上記第一の検出手段のフォトカプラには、前段の第一の検出手段の出力が入力され、上記第一の検出手段は、上記スナバ回路電圧及び次段の制御用電源電圧及び上記前段の第一の検出手段の出力の異常を出力に反映させることを特徴とする高電圧スイッチ回路の故障検出装置。In a failure detection device for a high voltage switch circuit for detecting a failure of a high voltage switch circuit in which a switch element for switching a high voltage is connected in multiple stages, a snubber circuit connected in parallel to the switch element is provided for each stage. , together with the snubber circuit voltage of the stage is entered, provided with a first detecting means including a photo coupler control power supply voltage used to control the next stage of the switching element is input, the upper Symbol first detection The output of the first detection means of the preceding stage is input to the photocoupler of the means, and the first detection means is provided with the snubber circuit voltage, the control power supply voltage of the next stage, and the first detection means of the preceding stage. A failure detection device for a high-voltage switch circuit, which reflects an output abnormality on the output . 第一の検出手段によって異常が検出される制御用電源電圧は、各段毎に形成されていることを特徴とする請求項１記載の高電圧スイッチ回路の故障検出装置。2. The failure detection device for a high-voltage switch circuit according to claim 1, wherein the control power supply voltage at which an abnormality is detected by the first detection means is formed for each stage. 最終段の第一の検出手段の出力により異常を判定する第二の検出手段を備え、上記第二の検出手段は、異常を判定したとき、制御用電源を制御する信号を出力することを特徴とする請求項１または請求項２記載の高電圧スイッチ回路の故障検出装置。A second detection means for determining an abnormality based on an output of the first detection means in the last stage, wherein the second detection means outputs a signal for controlling a control power supply when the abnormality is determined. 3. The failure detection device for a high-voltage switch circuit according to claim 1, wherein 第一段のスイッチ素子の制御に用いられる制御用電源電圧の入力に応じて導通し、この導通時にはドレイン電位を接地電位にするＦＥＴを有する第三の検出手段を備え、上記第三の検出手段のＦＥＴのドレイン電位は、上記第一段の第一の検出手段のフォトカプラに出力され、上記第一段の第一の検出手段は、上記第三の検出手段の出力の異常を出力に反映させることを特徴とする請求項１〜請求項３のいずれか一項記載の高電圧スイッチ回路の故障検出装置。 A third detection unit having an FET that conducts in response to an input of a control power supply voltage used for controlling the first-stage switch element and that sets a drain potential to a ground potential when the first stage switching element is turned on; the drain potential of the FET, are output to the photocoupler of the first detecting means of the first stage, the first detecting means in the first stage, reflected in the output of the abnormality of the output of said third detecting means failure detection device of the high voltage switch circuit of any one of claims 1 to 3, characterized in that cause.
JP2000380736A 2000-12-14 2000-12-14 High voltage switch circuit failure detection device Expired - Fee Related JP3593027B2 (en)

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CN104331625A (en) * 2014-11-13 2015-02-04 云南电网公司电力科学研究院 Operation state detection and 3D (three-dimensional) reconstruction analysis method for electricity-purpose high-voltage switch operation mechanism
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CN104331625A (en) * 2014-11-13 2015-02-04 云南电网公司电力科学研究院 Operation state detection and 3D (three-dimensional) reconstruction analysis method for electricity-purpose high-voltage switch operation mechanism
CN104331625B (en) * 2014-11-13 2017-10-24 云南电网公司电力科学研究院 A kind of electric power operation mechanism for high voltage switch condition monitoring and 3D restructuring analysis methods
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