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JPH063760B2 - X-ray high voltage device - Google Patents
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JPH063760B2 - X-ray high voltage device - Google Patents

X-ray high voltage device

Info

Publication number
JPH063760B2
JPH063760B2 JP60048382A JP4838285A JPH063760B2 JP H063760 B2 JPH063760 B2 JP H063760B2 JP 60048382 A JP60048382 A JP 60048382A JP 4838285 A JP4838285 A JP 4838285A JP H063760 B2 JPH063760 B2 JP H063760B2
Authority
JP
Japan
Prior art keywords
high voltage
voltage
current
transformer
voltage transformer
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 - Lifetime
Application number
JP60048382A
Other languages
Japanese (ja)
Other versions
JPS61208798A (en
Inventor
正己 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Healthcare Manufacturing Ltd
Original Assignee
Hitachi Medical Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Medical Corp filed Critical Hitachi Medical Corp
Priority to JP60048382A priority Critical patent/JPH063760B2/en
Publication of JPS61208798A publication Critical patent/JPS61208798A/en
Publication of JPH063760B2 publication Critical patent/JPH063760B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05GX-RAY TECHNIQUE
    • H05G1/00X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08Electrical details
    • H05G1/26Measuring, controlling or protecting
    • H05G1/265Measurements of current, voltage or power
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05GX-RAY TECHNIQUE
    • H05G1/00X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08Electrical details
    • H05G1/26Measuring, controlling or protecting
    • H05G1/54Protecting or lifetime prediction

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、高圧トランスから出力される高電圧波形を平
滑する高圧コンデンサを使用したX線高電圧装置に関
し、特に上記高圧コンデンサの耐圧不良等による短絡事
故の際の過大電流を検出することができるX線高電圧装
置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray high-voltage device using a high-voltage capacitor that smoothes a high-voltage waveform output from a high-voltage transformer, and particularly to a short circuit due to a poor withstand voltage of the high-voltage capacitor. The present invention relates to an X-ray high voltage device capable of detecting an excessive current in the event of an accident.

従来の技術 従来のこの種のX線高電圧装置は、第2図に示すよう
に、高電圧を発生する高圧トランス1と、この高圧トラ
ンス1の二次巻線3の側に設けられ該高圧トランス1の
出力を整流する整流器4,5と、この整流器4,5の出
力に対して並列に設けられ高電圧波形を平滑する高圧コ
ンデンサC1,C2とを有し、上記高圧トランス1及び整
流器4,5並びに高圧コンデンサC1,C2により生成さ
れた直流の高電圧を高圧四極真空管6,7で制御してX
線管8に高電圧を印加していた。なお、第2図において
符号9,10は、それぞれ高圧四極真空管6,7のグリ
ツドバイアス制御回路である。
2. Description of the Related Art As shown in FIG. 2, a conventional X-ray high-voltage device of this type includes a high-voltage transformer 1 that generates a high voltage and a high-voltage transformer that is provided on the secondary winding 3 side of the high-voltage transformer 1. It has rectifiers 4 and 5 for rectifying the output of the transformer 1, and high voltage capacitors C 1 and C 2 provided in parallel with the outputs of the rectifiers 4 and 5 for smoothing high voltage waveforms. The high voltage of direct current generated by the rectifiers 4 and 5 and the high voltage capacitors C 1 and C 2 is controlled by the high voltage quadrupole vacuum tubes 6 and 7 and X
A high voltage was applied to the wire tube 8. In FIG. 2, reference numerals 9 and 10 are grid bias control circuits for the high-voltage quadrupole vacuum tubes 6 and 7, respectively.

ここで、上記高圧トランス1の中性点11,12間には
電流計13が接続されており、この電流計13で上記X
線管8を流れる電流Itを測定していた。いま、高圧ト
ランス1の一次巻線2側に地絡事故があつたとすると、
その二次巻線3側に過大電流が流れてX線管8にも過大
電流が流れる。このとき、その過大電流を上記電流計1
3が検出し、この電流計13に設けられたリミツタが動
作して上記高圧トランス1の一次側入力を遮断してい
た。
An ammeter 13 is connected between the neutral points 11 and 12 of the high-voltage transformer 1, and the ammeter 13 connects the X-axis
The current I t flowing through the wire tube 8 was measured. If there is a ground fault on the primary winding 2 side of the high voltage transformer 1,
An excessive current flows on the side of the secondary winding 3 and an excessive current also flows on the X-ray tube 8. At this time, the excess current is measured by the ammeter 1 described above.
3 detects and the limiter provided in the ammeter 13 operates to shut off the primary side input of the high voltage transformer 1.

発明が解決しようとする問題点 しかし、このようなX線高電圧装置においては、高圧ト
ランス1の中性点11,12と高圧コンデンサC1,C2
のアース側が直接接続されているため、上記中性点1
1,12間に接続された電流計13では上記高圧コンデ
ンサC1,C2を流れる電流Icは検出することができな
かつた。従つて、例えば上記高圧コンデンサC1,C2
耐圧不良等により短絡事故を起したときに、第2図に矢
印Icで示すように高圧トランス1の二次巻線3側に過
大電流が流れても、上記電流計13ではそれを何ら検出
できなかつた。この結果、例えば、整流器4,5がパン
ク状態になつて破壊したり、或いは二次巻線3が焼損し
たり、又は高圧トランス1のコイルが位置ずれを起した
りして、高圧トランス1が動作不能となるものであつ
た。そこで、本発明はこのような問題点を解決すること
を目的とする。
However, in such an X-ray high voltage apparatus, the neutral points 11 and 12 of the high voltage transformer 1 and the high voltage capacitors C 1 and C 2 are to be solved.
Since the ground side of is directly connected, the neutral point 1 above
The ammeter 13 connected between 1 and 12 cannot detect the current I c flowing through the high voltage capacitors C 1 and C 2 . Therefore, for example, when the high-voltage capacitors C 1 and C 2 cause a short-circuit accident due to a poor withstand voltage or the like, an excessive current flows to the secondary winding 3 side of the high-voltage transformer 1 as shown by an arrow I c in FIG. Even if it did flow, the ammeter 13 could not detect it. As a result, for example, the rectifiers 4 and 5 become punctured and destroyed, the secondary winding 3 burns out, or the coil of the high-voltage transformer 1 is displaced, and the high-voltage transformer 1 is damaged. It became inoperable. Then, this invention aims at solving such a problem.

問題点を解決するための手段 上記の問題点を解決する本発明の手段は、高電圧を発生
する高圧トランスと、この高圧トランスの出力を整流す
る整流器と、この整流器の出力に対して並列に設けられ
高電圧波形を平滑する高圧コンデンサとを有し、X線管
に高電圧を印加するX線高電圧装置において、上記高圧
コンデンサのアース側と整流器との間に、該高圧コンデ
ンサに流れる過大電流を検出する電流検出器を設け、こ
の電流検出器の動作により上記高圧トランスの一次側入
力を遮断させるようにしたことを特徴とするX線高電圧
装置によつてなされる。
Means for Solving the Problems The means of the present invention for solving the above problems includes a high-voltage transformer that generates a high voltage, a rectifier that rectifies the output of the high-voltage transformer, and a parallel connection to the output of the rectifier. An X-ray high-voltage device having a high-voltage capacitor for smoothing a high-voltage waveform, which applies a high voltage to an X-ray tube, and an excessive flow of the high-voltage capacitor between the ground side of the high-voltage capacitor and the rectifier. An X-ray high voltage apparatus is characterized in that a current detector for detecting a current is provided and the primary side input of the high voltage transformer is cut off by the operation of the current detector.

実施例 以下、本発明の実施例を添付図面に基いて詳細に説明す
る。
Examples Hereinafter, examples of the present invention will be described in detail with reference to the accompanying drawings.

第1図は本発明によるX線高電圧装置の実施例を示す回
路図である。このX線高電圧装置は、高圧トランス1
と、整流器4,5と、高圧コンデンサC1,C2と、電流
検出器14,15とを有して成る。
FIG. 1 is a circuit diagram showing an embodiment of an X-ray high voltage device according to the present invention. This X-ray high voltage device is a high voltage transformer 1
, Rectifiers 4 and 5, high voltage capacitors C 1 and C 2 , and current detectors 14 and 15.

上記高圧トランス1は、図示外の電源回路から供給され
る交流電圧を昇圧するもので、一次巻線2と二次巻線3
とを有すると共に、一次巻線2の入力側にはノーマルク
ローズの接点16が設けられている。前記整流器4,5
は、上記高圧トランス1で発生した高電圧を直流に変換
するもので、二次巻線3の出力側にそれぞれ設けられて
いる。前記高圧コンデンサC1,C2は、上記整流器4,
5で整流された高電圧波形を平滑するもので、該整流器
4,5の出力に対して並列に設けられている。そして、
上記高圧トランス1及び整流器4,5並びに高圧コンデ
ンサC1,C2により生成された直流の高電圧は、高圧四
極真空管6,7で制御されX線管8に高電圧が印加され
るようになつている。なお、第1図において符号9,1
0は、それぞれ高圧四極真空管6,7のグリツドバイア
ス制御回路であり、符号13は、上記高圧トランス1の
中性点11,12の間に接続された電流計である。
The high-voltage transformer 1 boosts an AC voltage supplied from a power supply circuit (not shown), and includes a primary winding 2 and a secondary winding 3
And a normally closed contact 16 is provided on the input side of the primary winding 2. The rectifiers 4, 5
Are for converting the high voltage generated in the high voltage transformer 1 into direct current, and are provided on the output side of the secondary windings 3, respectively. The high-voltage capacitors C 1 and C 2 are the rectifiers 4 and
It smoothes the high-voltage waveform rectified by 5, and is provided in parallel with the outputs of the rectifiers 4, 5. And
The high voltage of the direct current generated by the high voltage transformer 1, the rectifiers 4, 5 and the high voltage capacitors C 1 , C 2 is controlled by the high voltage quadrupole vacuum tubes 6, 7 so that the high voltage is applied to the X-ray tube 8. ing. In FIG. 1, reference numerals 9 and 1
Reference numeral 0 is a grid bias control circuit for the high voltage quadrupole vacuum tubes 6 and 7, and reference numeral 13 is an ammeter connected between the neutral points 11 and 12 of the high voltage transformer 1.

ここで、本発明においては、上記高圧コンデンサC1
2のアース側と整流器4,5との間に、電流検出器1
4,15が設けられている。この電流検出器14,15
は、上記高圧コンデンサC1,C2に流れる過大電流を検
出するもので、電流検出リレー17,18と、分流抵抗
器R1,R2と、コンデンサC3,C4とを並列に接続して
構成されている。上記電流検出リレー17,18は、規
定値以上の電流が流れると動作して、遮断駆動回路19
のノーマルオープンの接点20,21をONとするもの
である。上記分流抵抗器R1,R2は、上記電流検出リレ
ー17,18に流れる電流を調整して、該電流検出リレ
ー17,18の動作点を決めるものである。上記コンデ
ンサC3,C4は、高圧トランス1に電源をONすること
により上記高圧コンデンサC1,C2に高電圧が印加され
た瞬間に流れる突入電流で上記電流検出リレー17,1
8が動作しないよう時遅れをもたせるものである。
Here, in the present invention, the high voltage capacitor C 1 ,
Between the ground side of C 2 and the rectifiers 4 and 5, a current detector 1
4, 15 are provided. This current detector 14, 15
Is for detecting an excessive current flowing through the high voltage capacitors C 1 and C 2 , and connecting the current detection relays 17 and 18, the shunt resistors R 1 and R 2, and the capacitors C 3 and C 4 in parallel. Is configured. The current detection relays 17 and 18 operate when a current of a specified value or more flows, and the cutoff drive circuit 19
The normally open contacts 20 and 21 are turned on. The shunt resistors R 1 and R 2 adjust the currents flowing through the current detection relays 17 and 18 to determine the operating points of the current detection relays 17 and 18. The capacitors C 3 and C 4 are rush currents that flow at the moment when a high voltage is applied to the high voltage capacitors C 1 and C 2 by turning on the high voltage transformer 1, and the current detection relays 17 1
8 has a time delay so that it does not operate.

次に、このように構成されたX線高電圧装置の動作につ
いて説明する。まず、上記高圧コンデンサC1,C2が正
常に機能している通常時においては、高圧トランス1の
一次巻線2の入力側に設けられた接点16を閉路する
と、図示外の電源回路から交流電圧が供給され、上記高
圧トランス1で昇圧されて二次巻線3の出力側に高電圧
が発生する。この高電圧は、整流器4,5によつて直流
に変換された後に、上記高圧コンデンサC1,C2により
その波形のリツプルが平滑される。このようにして生成
された直流の高電圧は、高圧四極真空管6,7により任
意にスイツチング及び電圧制御されて、X線管8に印加
される。このとき、該X線管8を流れる電流Itは、高
圧トランス1の中性点11,12に接続された電流計1
3により測定される。そして、もし上記X線管8に過大
電流が流れたら、上記電流計13で検出してリミツタが
動作し、上記高圧トランス1の一次側入力を遮断する。
Next, the operation of the X-ray high voltage apparatus configured as described above will be described. First, when the high-voltage capacitors C 1 and C 2 are normally functioning, when the contact 16 provided on the input side of the primary winding 2 of the high-voltage transformer 1 is closed, an AC power is supplied from a power circuit (not shown). A voltage is supplied and boosted by the high voltage transformer 1 to generate a high voltage on the output side of the secondary winding 3. This high voltage is converted into direct current by the rectifiers 4 and 5, and then ripples of its waveform are smoothed by the high voltage capacitors C 1 and C 2 . The high DC voltage thus generated is applied to the X-ray tube 8 after being arbitrarily switched and voltage-controlled by the high-voltage quadrupole vacuum tubes 6 and 7. At this time, the current It flowing through the X-ray tube 8 is the current I t connected to the neutral points 11 and 12 of the high voltage transformer 1.
3 is measured. If an excessive current flows through the X-ray tube 8, it is detected by the ammeter 13 and the limiter operates to cut off the primary side input of the high voltage transformer 1.

次に、上記高圧コンデンサC1,C2が耐圧不良等により
導通状態となつた異常時においては、整流器4,5から
出力された直流の高電圧は該高圧コンデンサC1,C2
通つて直接高圧トランス1の二次巻線3に帰還する。こ
のとき、上記高圧コンデンサC1,C2を流れる過大電流
cは、上記電流検出器14,15で検出される。すな
わち、その電流検出リレー17,18に規定値以上の電
流が流れ、上記電流検出リレー17,18が動作して遮
断駆動回路19の接点20,21をONとする。する
と、サイリスタ22に電圧が供給されてトリガされ、こ
れにより遮断リレー23に電流が流れて動作し、この遮
断リレー23の動作により上記高圧トランス1の一次巻
線2の入力側に設けられた接点16を開路とする。この
結果、上記高圧トランス1の一次側入力が遮断され、該
高圧トランス1の二次側へ過大電流が流れるのを防止す
ることができる。
Next, when the high-voltage capacitors C 1 and C 2 are in an abnormal state where they become conductive due to a poor withstand voltage or the like, the high DC voltage output from the rectifiers 4 and 5 passes through the high-voltage capacitors C 1 and C 2. It is directly fed back to the secondary winding 3 of the high voltage transformer 1. At this time, the excessive current I c flowing through the high voltage capacitors C 1 and C 2 is detected by the current detectors 14 and 15. That is, a current exceeding the specified value flows through the current detection relays 17 and 18, and the current detection relays 17 and 18 operate to turn on the contacts 20 and 21 of the breaking drive circuit 19. Then, a voltage is supplied to the thyristor 22 to trigger the thyristor 22, which causes a current to flow through the interruption relay 23 to operate, and the operation of the interruption relay 23 causes a contact provided on the input side of the primary winding 2 of the high-voltage transformer 1. 16 is opened. As a result, it is possible to prevent the primary side input of the high-voltage transformer 1 from being cut off and an excessive current from flowing to the secondary side of the high-voltage transformer 1.

発明の効果 本発明は以上説明したように、高圧コンデンサC1,C2
のアース側と整流器4,5との間に電流検出器14,1
5を設けたので、上記高圧コンデンサC1,C2が耐圧不
良等により短絡事故を起したときに該高圧コンデンサC
1,C2に流れる過大電流Icを検出することができる。
従つて、この電流検出器14,15による過大電流Ic
の検出動作により、高圧トランス1の一次側入力を遮断
させることができる。このことから、上記高圧トランス
1の二次巻線3が焼損して該高圧トランス1が動作不能
となつたり、或いは整流器4,5がパンク状態となつて
破壊したりする二次的事故を未然に防止することができ
る。
EFFECTS OF THE INVENTION As described above, the present invention provides high-voltage capacitors C 1 and C 2
Current detectors 14,1 between the ground side of the and rectifiers 4,5
Since the high voltage capacitors C 1 and C 2 cause a short circuit due to poor withstand voltage or the like, the high voltage capacitors C 1 and C 2 are provided.
It is possible to detect the excessive current I c flowing through 1 and C 2 .
Therefore, the excessive current I c generated by the current detectors 14 and 15 is increased.
The primary side input of the high voltage transformer 1 can be shut off by the detection operation of. As a result, a secondary accident such that the secondary winding 3 of the high-voltage transformer 1 is burned out and the high-voltage transformer 1 becomes inoperable, or the rectifiers 4 and 5 are punctured and destroyed. Can be prevented.

【図面の簡単な説明】[Brief description of drawings]

第1図は本発明によるX線高電圧装置の実施例を示す回
路図、第2図は従来のX線高電圧装置を示す回路図であ
る。 1…高圧トランス、 4,5…整流器、 8…X線管、 14,15…電流検出器、 16…高圧トランスの一次側に設けられた接点、 17,18…電流検出リレー、 19…遮断駆動回路、 20,21…遮断駆動回路の接点、 23…遮断リレー。
FIG. 1 is a circuit diagram showing an embodiment of an X-ray high voltage device according to the present invention, and FIG. 2 is a circuit diagram showing a conventional X-ray high voltage device. DESCRIPTION OF SYMBOLS 1 ... High voltage transformer, 4, 5 ... Rectifier, 8 ... X-ray tube, 14, 15 ... Current detector, 16 ... Contact provided on the primary side of high voltage transformer, 17, 18 ... Current detection relay, 19 ... Break drive Circuits, 20, 21 ... Breaker drive circuit contacts, 23 ... Breaker relay.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】高電圧を発生する高圧トランスと、この高
圧トランスの出力を整流する整流器と、この整流器の出
力に対して並列に設けられ高電圧波形を平滑する高圧コ
ンデンサとを有し、X線管に高電圧を印加するX線高電
圧装置において、上記高圧コンデンサのアース側と整流
器との間に、該高圧コンデンサに流れる過大電流を検出
する電流検出器を設け、この電流検出器の動作により上
記高圧トランスの一次側入力を遮断させるようにしたこ
とを特徴とするX線高電圧装置。
1. A high voltage transformer for generating a high voltage, a rectifier for rectifying an output of the high voltage transformer, and a high voltage capacitor provided in parallel with the output of the rectifier for smoothing a high voltage waveform. In an X-ray high voltage device for applying a high voltage to a line tube, a current detector for detecting an excessive current flowing in the high voltage capacitor is provided between the ground side of the high voltage capacitor and the rectifier, and the operation of the current detector The X-ray high voltage apparatus is characterized in that the primary side input of the high-voltage transformer is cut off by the above.
JP60048382A 1985-03-13 1985-03-13 X-ray high voltage device Expired - Lifetime JPH063760B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60048382A JPH063760B2 (en) 1985-03-13 1985-03-13 X-ray high voltage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60048382A JPH063760B2 (en) 1985-03-13 1985-03-13 X-ray high voltage device

Publications (2)

Publication Number Publication Date
JPS61208798A JPS61208798A (en) 1986-09-17
JPH063760B2 true JPH063760B2 (en) 1994-01-12

Family

ID=12801760

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60048382A Expired - Lifetime JPH063760B2 (en) 1985-03-13 1985-03-13 X-ray high voltage device

Country Status (1)

Country Link
JP (1) JPH063760B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4514073A4 (en) * 2022-04-21 2026-04-01 Remedi Co Ltd X-RAY GENERATION DEVICE

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS618900A (en) * 1984-06-22 1986-01-16 Yokogawa Medical Syst Ltd X-ray generating circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4514073A4 (en) * 2022-04-21 2026-04-01 Remedi Co Ltd X-RAY GENERATION DEVICE

Also Published As

Publication number Publication date
JPS61208798A (en) 1986-09-17

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