JP2565943B2 - Acceleration power supply protection circuit - Google Patents
Acceleration power supply protection circuitInfo
- Publication number
- JP2565943B2 JP2565943B2 JP62293155A JP29315587A JP2565943B2 JP 2565943 B2 JP2565943 B2 JP 2565943B2 JP 62293155 A JP62293155 A JP 62293155A JP 29315587 A JP29315587 A JP 29315587A JP 2565943 B2 JP2565943 B2 JP 2565943B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- control circuit
- load
- power supply
- semiconductor switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- Plasma Technology (AREA)
- Particle Accelerators (AREA)
- Power Conversion In General (AREA)
- Generation Of Surge Voltage And Current (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は核融合装置の中性粒子入射装置などに用いら
れる加速電源装置の保護回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a protection circuit for an accelerating power supply device used in a neutral particle injector of a nuclear fusion device.
（従来の技術） 中性粒子入射装置用加速電源装置は、プラズマ化され
た気体中のイオンを加速し、途中でこれを中性化したも
のを他のプラズマ等に入射するためのイオン加速用の高
電圧直流電源装置である。負荷であるイオン源はしばし
ば短絡状態となることがあり、加速電源装置は、短絡を
検出して高速にしゃ断する機能を有することが必要とな
る。(Prior Art) An acceleration power supply device for a neutral particle injection device is for accelerating ions in a gas that has been turned into plasma and for neutralizing the ions on the way to inject them into another plasma or the like. It is a high voltage DC power supply device. The ion source, which is a load, is often short-circuited, and the acceleration power supply device needs to have a function of detecting a short-circuit and shutting it off at high speed.
従来の加速電源装置の主回路は第３図に示すような構
成となっている。第３図において、11はサイリスタスイ
ッチ、12は昇圧変圧器、13は整流器、14は平滑用コンデ
ンサ、17Aは入力側直流分圧器、19は出力電圧の設定器
でもあり、平滑用コンデンサ14と負荷18との間に設けら
れた電圧制御回路30は、直列接続される複数の第１の半
導体スイッチ〔たとえばゲートターンオフサイリスタ
（GTO）〕311,312…31nと、この各半導体スイッチ311,3
12…31nにそれぞれ並列接続される電圧分担素子〔たと
えば非線型抵抗器321,322…32nから成り、前記第１の半
導体スイッチ311,312…31nを制御回路40よりオン・オフ
制御することで負荷18への過渡時の電圧を制御する。定
常時の電圧はサイリスタスイッチ11により負荷18に印加
する電圧を一定に保つように設定されている。また電圧
制御回路30に直列接続される第２の半導体スイッチ〔た
とえばゲートターンオフサイリスタ（GTO）〕50は負荷
電流をしゃ断する可能を有する。第２の半導体スイッチ
50の直列接続されるリアクトル60は、負荷18で短絡事故
等が発生した場合の過電流を抑制するもので、リアクト
ル60と並列に接続されるダイオード61は、負荷電流しゃ
断時にリアクトル60に流れていた電流を還流させ、過電
圧の発生を防止するためのものである。The main circuit of a conventional acceleration power supply device has a structure as shown in FIG. In FIG. 3, 11 is a thyristor switch, 12 is a step-up transformer, 13 is a rectifier, 14 is a smoothing capacitor, 17A is an input side DC voltage divider, 19 is also an output voltage setting device, smoothing capacitor 14 and load. The voltage control circuit 30 provided between the first and the second semiconductor switches 31 and 312 is connected in series with a plurality of first semiconductor switches [eg gate turn-off thyristor (GTO)] 311, 312 ...
12n are connected in parallel to the voltage sharing elements (eg, non-linear resistors 321, 322 ... 32n, and are controlled by the control circuit 40 to turn on / off the first semiconductor switches 311, 312 ... Control the voltage of time. The constant voltage is set by the thyristor switch 11 so as to keep the voltage applied to the load 18 constant. A second semiconductor switch (eg, gate turn-off thyristor (GTO)) 50 connected in series with the voltage control circuit 30 has a capability of cutting off the load current. Second semiconductor switch
The reactor 60 connected in series with 50 suppresses the overcurrent when a short-circuit accident occurs in the load 18, and the diode 61 connected in parallel with the reactor 60 flows into the reactor 60 when the load current is cut off. This is to prevent the occurrence of overvoltage by circulating the generated current.
次に、電圧制御回路30をオン・オフ制御する制御回路
40について説明する。Next, a control circuit for controlling the voltage control circuit 30 on / off
40 will be described.
第４図は従来の制御回路40を示す構成図であり、図中
19は出力電圧の設定器、22は電圧基準信号、23Aは入力
電圧信号、30は電圧制御回路で第３図と同一の機能を有
するので説明は省略する。40は制御回路で、その構成に
ついて述べると、401は電圧誤差増幅器、411,412…41n
は電圧比較器、421,422…42nは、電圧比較器411,412,41
nのそれぞれ動作値を決める設定器である。FIG. 4 is a block diagram showing a conventional control circuit 40.
Reference numeral 19 is an output voltage setting device, 22 is a voltage reference signal, 23A is an input voltage signal, and 30 is a voltage control circuit, which has the same function as in FIG. Reference numeral 40 is a control circuit. When the configuration is described, 401 is a voltage error amplifier, 411, 412 ... 41n.
Is a voltage comparator, 421, 422 ... 42n is a voltage comparator 411, 412, 41
It is a setter that determines each operating value of n.
かかる構成においてその動作原理を説明すると、電圧
誤差増幅器401は、設定器19から送られてきた電圧基準
信号22と入力電圧信号23Aとが等しくなるよう、自動制
御し、電圧比較器411,412…41nに指令値401Aを与える。
電圧比較器411,412…41nへは、設定器421,422…42nによ
りそれぞれ、電圧分担素子の分担電圧に相当するきざみ
で、重みを付けて、動作値が与えられる。To explain the operation principle in such a configuration, the voltage error amplifier 401 automatically controls the voltage reference signal 22 sent from the setter 19 and the input voltage signal 23A to be equal, and causes the voltage comparators 411, 412, ... Give the command value 401A.
.. 41n are given weighting to the voltage comparators 411, 412, ... 41n in increments corresponding to the shared voltage of the voltage sharing elements by the setters 421, 422 ,.
第５図（ａ）は、指令値401Aと、半導体スイッチ311,
312…31nのそれぞれの状態を示したものである。第５図
（ｂ）は、時刻ｔと指令値401Aの変化を示した１例であ
る。即ち、時刻ｔの経過とともに、指令値401Aが小、従
って第３図に示す負荷18の印加電圧を一定にする場合を
例にとると、時刻ｔの経過とともに、指令値401Aが小に
なり、時刻t1になると、電圧比較器411の動作値X1に達
し電圧比較器411が半導体スイッチ311へオン指令を与え
る。401Aの出力が動作値X2未満であれば、半導体スイッ
チ311がオン状態にあるだけで、他の半導体スイッチは
全て、オフ状態にある。次に、指令値401Aが更に小とな
り、時刻t2になると電圧比較器412の動作値X2に達し、
電圧比較器412は、半導体スイッチ312にオン指令を与え
る。このときは、半導体スイッチ311,312がオン状態他
はオフ状態となる。このように、指令値401Aの減少とと
もに順次半導体スイッチ311,312…31nへオン指令を与え
ることにより、第３図に示す負荷18の印加電圧を一定に
制御することが出来るが下記のような問題があった。FIG. 5A shows a command value 401A, semiconductor switch 311,
It shows each state of 312 ... 31n. FIG. 5B is an example showing a change in the time t and the command value 401A. That is, with the passage of time t, the command value 401A becomes small, and therefore, in the case where the applied voltage of the load 18 shown in FIG. 3 is made constant, the command value 401A becomes smaller with the passage of time t, At time t 1 , the operating value X 1 of the voltage comparator 411 is reached, and the voltage comparator 411 gives an on command to the semiconductor switch 311. If the output of 401A is less than the operation value X 2 , only the semiconductor switch 311 is in the ON state, and all the other semiconductor switches are in the OFF state. Next, the command value 401A becomes smaller, and at time t 2 , the operating value X 2 of the voltage comparator 412 is reached,
The voltage comparator 412 gives an ON command to the semiconductor switch 312. At this time, the semiconductor switches 311 and 312 are in the on state and other states are in the off state. As described above, by sequentially turning on the semiconductor switches 311, 312, ..., 31n as the command value 401A decreases, the applied voltage of the load 18 shown in FIG. 3 can be controlled to be constant, but there are the following problems. It was
基準電圧信号22と入力電圧信号23Aを比較し、第１の
半導体スイッチ311,312…31nをオン・オフさせている
が、電圧信号22または入力電圧信号23Aに不具合が生じ
ると第１の半導体スイッチ311,312…31nがオフ状態とな
り、電圧分担素子321,322…32nに電流が流れ続け、電圧
分担素子321,322…32nが破壊する。31n is compared with the reference voltage signal 22 and the input voltage signal 23A to turn on / off the first semiconductor switches 311, 312 ... 31n, but when a defect occurs in the voltage signal 22 or the input voltage signal 23A, the first semiconductor switches 311, 312 ... 32n is turned off, current continues to flow in the voltage sharing elements 321, 322 ... 32n, and the voltage sharing elements 321, 322 ... 32n are destroyed.
（発明が解決しようとする問題点） このように従来のものは基準電圧信号と入力電圧信号
を比較し、第１の半導体スイッチをオン・オフさせてい
るが、電圧信号または入力電圧信号に不具合が生じると
第１の半導体スイッチがオフ状態となり、電圧分担素子
に電流が流れ続け、電圧分担素子が破壊する欠点があっ
た。(Problems to be Solved by the Invention) As described above, the conventional device compares the reference voltage signal with the input voltage signal and turns on / off the first semiconductor switch. However, the voltage signal or the input voltage signal is defective. When the above occurs, the first semiconductor switch is turned off, current continues to flow in the voltage sharing element, and there is a drawback that the voltage sharing element is destroyed.
そこで、本発明の目的とするところは負荷への悪影
響、電圧分担素子を破壊から防止することが出来る加速
電源装置の保護回路を提供するにある。Therefore, an object of the present invention is to provide a protection circuit for an acceleration power supply device, which can prevent the adverse effect on the load and the breakdown of the voltage sharing element.
［発明の構成］ （問題点を解決するための手段） 本発明は上記の目的を達成するために、直流電源と負
荷との間に設けられ、前記負荷に加わる電圧を制御する
ための直列接続された複数の半導体スイッチと該半導体
スイッチにそれぞれ並列接続される非線型抵抗器からな
る電圧分担素子とで構成された電圧制御回路と、半導体
スイッチの入力側電圧と基準電圧を比較し、その偏差に
応じて前記半導体スイッチを駆動する制御回路とを具備
した加速電源装置において、前記負荷に流れる電流を検
出する電流検出回路と、この電流検出回路の出力を積分
する積分器と、前記制御回路の基準電圧又は半導体スイ
ッチの入力電圧に不具合が発生し、前記積分器の出力が
所定値に達すると全ての前記半導体スイッチを一斉に駆
動する回路とを設ける構成とする。[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention is provided between a DC power supply and a load, and is connected in series to control the voltage applied to the load. Voltage control circuit composed of a plurality of semiconductor switches and a voltage sharing element composed of a non-linear resistor connected in parallel to each of the semiconductor switches, and comparing the input side voltage of the semiconductor switch with the reference voltage, and the deviation In a accelerating power supply device including a control circuit that drives the semiconductor switch according to the above, a current detection circuit that detects a current flowing through the load, an integrator that integrates an output of the current detection circuit, and a control circuit of the control circuit. A circuit is provided for driving all the semiconductor switches at once when a defect occurs in the reference voltage or the input voltage of the semiconductor switches and the output of the integrator reaches a predetermined value. To.
（作用） 従って、このような構成の加速電源装置の保護回路に
あっては、電圧制御回路の直列接続された複数の半導体
スイッチを制御回路よりオン・オフ制御することで負荷
への過渡時の電圧を制御する際、電流検出回路により検
出された負荷電流を積分し、その積分値が制御回路の基
準電圧又は半導体スイッチの入力電圧の不具合の発生時
に所定値に達すると全ての半導体スイッチが一斉にオン
駆動されるので、非線型抵抗器からなる電圧分担素子に
電流が流れ続けることがなくなり、負荷への悪影響、電
圧分担素子の破壊を防止することができる。(Operation) Accordingly, in the protection circuit of the acceleration power supply device having such a configuration, the control circuit turns on / off a plurality of semiconductor switches connected in series in the voltage control circuit to prevent a load transient. When the voltage is controlled, the load current detected by the current detection circuit is integrated, and if the integrated value reaches a specified value when a defect occurs in the reference voltage of the control circuit or the input voltage of the semiconductor switch, all semiconductor switches will be operated simultaneously. Since it is driven on, the current does not continue to flow through the voltage sharing element formed of the non-linear resistor, and it is possible to prevent the load from being adversely affected and the voltage sharing element from being destroyed.
（実施例） 以下、本発明の一実施例を第１図を参照して説明す
る。尚第３図と同一部分には同一符号を付す。Embodiment An embodiment of the present invention will be described below with reference to FIG. The same parts as those in FIG. 3 are designated by the same reference numerals.
第１図において、11はサイリスタスイッチ、12は変圧
器、13は整流器、14は平滑用コンデンサ、30は電圧制御
回路、50は第２半導体スイッチ、60はリアクトル、61は
負荷電流しゃ断時リアクトルに流れている電流を還流さ
せるダイオード、18は負荷、19は出力電圧設定器、41は
電圧制御回路30の制御回路である。In FIG. 1, 11 is a thyristor switch, 12 is a transformer, 13 is a rectifier, 14 is a smoothing capacitor, 30 is a voltage control circuit, 50 is a second semiconductor switch, 60 is a reactor, and 61 is a reactor when a load current is interrupted. Reference numeral 18 is a load, 19 is an output voltage setting device, and 41 is a control circuit of the voltage control circuit 30.
第２の半導体スイッチ50とリアクトル60の間に直流交
流器51を設け、その電流信号500を制御回路41に入力す
る。いま負荷18が短絡し、第２の半導体スイッチがオフ
すると負荷電流がしゃ断され、平滑用コンデンサ14の電
圧は、変圧器12のインダクタンスに貯えられたエネルギ
ー分だけ上昇する。A DC / AC device 51 is provided between the second semiconductor switch 50 and the reactor 60, and its current signal 500 is input to the control circuit 41. Now, when the load 18 is short-circuited and the second semiconductor switch is turned off, the load current is cut off, and the voltage of the smoothing capacitor 14 rises by the amount of energy stored in the inductance of the transformer 12.
第２図は、制御回路41の具体的一実施例を示す構成図
であり、図中19は出力電圧設定器、22は電圧基準信号、
23Aは入力電圧信号、30は電圧制御回路で第３図と同一
の機能を有するので説明は省略する。又401は電圧誤差
増幅器、411,412…41nは電圧比較器、421,422…42nは電
圧比較器411,412…41nのそれぞれ動作値を決める設定器
で第４図と同一の機能を有するので説明は省略する。制
御回路41の構成において、501は出力電流を積分する積
分器、502は比較器、503は比較器502の動作値を決める
設定器、511,512…51nはOR回路である。FIG. 2 is a block diagram showing a concrete example of the control circuit 41, in which 19 is an output voltage setting device, 22 is a voltage reference signal,
23A is an input voltage signal, and 30 is a voltage control circuit, which has the same function as in FIG. 41n is a voltage error amplifier, 411, 412 ... 41n are voltage comparators, and 421, 422 ... 42n are setters for determining respective operating values of the voltage comparators 411, 412 ... 41n, which have the same functions as those in FIG. In the configuration of the control circuit 41, 501 is an integrator that integrates the output current, 502 is a comparator, 503 is a setting device that determines the operating value of the comparator 502, and 511, 512 ... 51n are OR circuits.
制御回路41の動作原理を説明する。ただし第４図と同
一機能を有するものは説明を省略する。本回路におい
て、出力電流を検出する直流交流器51よりの電流信号50
0を受け、積分器501は出力電流を積分する。比較器502
は、設定器503より、電圧分担素子321,322…32nの耐エ
ネルギー相当の動作値が与えられる。ここで基準信号22
または入力電圧信号23Aに不具合が発生し、電圧分担素
子321,322…32nに常時電圧が印加状態となったとしても
出力電流を検出し、ある電流・時間積以上になると全て
の第１の半導体スイッチ311,312…31nをオンさせ、電圧
分担素子に長時間電圧が印加されることを防止出来る。The operation principle of the control circuit 41 will be described. However, description of those having the same functions as those in FIG. 4 will be omitted. In this circuit, the current signal 50 from the DC / AC device 51 that detects the output current
Upon receiving 0, the integrator 501 integrates the output current. Comparator 502
Is provided with an operation value corresponding to the energy resistance of the voltage sharing elements 321, 322 ... 32n from the setter 503. Where the reference signal 22
Alternatively, even if a failure occurs in the input voltage signal 23A and a voltage is constantly applied to the voltage sharing elements 321, 322 ... 32n, the output current is detected, and when the current exceeds a certain current / time product, all the first semiconductor switches 311, 312 It is possible to prevent the voltage from being applied to the voltage sharing element for a long time by turning on 31n.
［発明の効果］ 以上から明らかなように本発明によれば、半導体スイ
ッチの入力側直流電圧と基準電圧とを比較する回路と出
力電流の電流・時間積を検出する回路のORをとることで
制御信号系の不具合等による電圧分担素子の破壊を防止
出来る加速電源装置の保護回路を提供出来る。[Effects of the Invention] As is clear from the above, according to the present invention, the OR of the circuit for comparing the input side DC voltage of the semiconductor switch with the reference voltage and the circuit for detecting the current-time product of the output current are taken. It is possible to provide a protection circuit for an acceleration power supply device that can prevent the breakdown of the voltage sharing element due to a defect in the control signal system or the like.
第１図は本発明の一実施例を示す構成図、第２図は第１
図の制御回路の具体的構成図、第３図は従来装置の構成
図、第４図は第３図の制御回路の具体的構成図、第５図
は第３図の動作を説明するための図である。 11……サイリスタスイッチ、12……変圧器、13……整流
器、14……平滑用コンデンサ、17……入力側直流分圧
器、18……負荷、30……電圧制御回路、40……制御回
路、50……第２半導体スイッチ、51……直流変流器、60
……リアクトル、501……積分器、502……比較器。FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG.
3 is a block diagram of the control circuit shown in FIG. 3, FIG. 3 is a block diagram of a conventional device, FIG. 4 is a block diagram of the control circuit of FIG. 3, and FIG. 5 is a block diagram for explaining the operation of FIG. It is a figure. 11 …… thyristor switch, 12 …… transformer, 13 …… rectifier, 14 …… smoothing capacitor, 17 …… input side DC voltage divider, 18 …… load, 30 …… voltage control circuit, 40 …… control circuit , 50 …… Second semiconductor switch, 51 …… DC current transformer, 60
…… Reactor, 501 …… Integrator, 502 …… Comparator.
Claims (1)
荷に加わる電圧を制御するための直列接続された複数の
半導体スイッチと該半導体スイッチにそれぞれ並列接続
される非線型抵抗器からなる電圧分担素子とで構成され
た電圧制御回路と、前記半導体スイッチの入力側電圧と
基準電圧を比較し、その偏差に応じて前記半導体スイッ
チを駆動する制御回路とを具備した加速電源装置におい
て、 前記負荷に流れる電流を検出する電流検出回路と、この
電流検出回路の出力を積分する積分器と、前記制御回路
の基準電圧又は半導体スイッチの入力電圧に不具合が発
生し、前記積分器の出力が所定値に達すると全ての前記
半導体スイッチを一斉に駆動する回路とを設けたことを
特徴とする加速電源装置の保護回路。1. A plurality of semiconductor switches connected in series for controlling a voltage applied to the load and provided between a DC power source and a load, and a non-linear resistor connected in parallel to each semiconductor switch. In an acceleration power supply device comprising a voltage control circuit configured with a voltage sharing element, a control circuit for comparing an input side voltage of the semiconductor switch and a reference voltage, and driving the semiconductor switch according to the deviation, A current detection circuit that detects the current flowing through the load, an integrator that integrates the output of this current detection circuit, and a reference voltage of the control circuit or an input voltage of the semiconductor switch has a defect, and the output of the integrator has a predetermined value. A protection circuit for an acceleration power supply device, which is provided with a circuit for driving all the semiconductor switches at once when the value is reached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62293155A JP2565943B2 (en) | 1987-11-20 | 1987-11-20 | Acceleration power supply protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62293155A JP2565943B2 (en) | 1987-11-20 | 1987-11-20 | Acceleration power supply protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01136557A JPH01136557A (en) | 1989-05-29 |
| JP2565943B2 true JP2565943B2 (en) | 1996-12-18 |
Family
ID=17791130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62293155A Expired - Fee Related JP2565943B2 (en) | 1987-11-20 | 1987-11-20 | Acceleration power supply protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2565943B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003028997A (en) * | 2001-07-18 | 2003-01-29 | National Institute Of Advanced Industrial & Technology | Pulse power source |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4874769A (en) * | 1971-12-24 | 1973-10-08 | ||
| JPS54140934A (en) * | 1978-04-25 | 1979-11-01 | Central Res Inst Of Electric Power Ind | Starting of dc-to-ac converter |
-
1987
- 1987-11-20 JP JP62293155A patent/JP2565943B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4874769A (en) * | 1971-12-24 | 1973-10-08 | ||
| JPS54140934A (en) * | 1978-04-25 | 1979-11-01 | Central Res Inst Of Electric Power Ind | Starting of dc-to-ac converter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01136557A (en) | 1989-05-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |