JPH1174096A5

JPH1174096A5 -

Info

Publication number: JPH1174096A5
Application number: JP1997245961A
Authority: JP
Filing date: 1997-08-28
Publication date: 2005-06-02
Anticipated expiration: 2017-08-28

Description

【００１２】
【課題を解決するための手段】
上記目的は、交流電圧源と、この交流電圧源に一次巻線が接続されその電圧を昇圧する高電圧変圧器と、この高電圧変圧器の二次巻線に接続され昇圧された交流電圧を直流高電圧に変換する高電圧整流器と、この高電圧整流器に接続されこの直流高電圧を平滑化するコンデンサと、このコンデンサに接続されたＸ線管と、からなるＸ線高電圧装置において、前記Ｘ線管からのＸ線の放射を停止した時に、前記コンデンサーに蓄積され管電圧の波尾を生じさせる電荷のエネルギーを前記高電圧変圧器の前記二次巻線側から前記一次巻線側に前記高電圧変圧器を経由せずに回生させる波尾エネルギー回生手段を設けたことを特徴とするＸ線高電圧装置を設けることによって達成される。
また、前記波尾エネルギー回生手段は、前記Ｘ線放射の停止時、X線放射中に前記コンデンサーに蓄えられていた電荷のエネルギーにて生じる前記波尾部分を除去して管電圧を急激に降下させるとともに、前記除去した波尾部分のエネルギーを前記一次巻線側の電気エネルギー蓄積素子に回生させるものでも良い。
前記波尾エネルギー回生手段は、前記コンデンサの両端電圧がほとんどゼロあるいはマイナスになるまで放電を持続させるように構成されたものでも良い。
このように構成することによって、Ｘ線曝射停止時に前記コンデンサに蓄積された電荷のエネルギを交流電圧源若しくは他の電気エネルギー蓄積要素に回生されるので、従来の電流制限用インピーダンスやテトロード及びこれらの冷却装置が不要となってＸ線高電圧装置の高電圧部の小型化が可能となると共に、この時の電力が有効に利用できるという利点が生じる。 [0012]
[Means for solving the problem]
The above object is achieved by providing an X-ray high voltage device comprising an AC voltage source, a high-voltage transformer having a primary winding connected to the AC voltage source and stepping up the voltage, a high-voltage rectifier connected to a secondary winding of the high-voltage transformer and converting the stepped-up AC voltage into a DC high voltage, a capacitor connected to the high-voltage rectifier and smoothing the DC high voltage, and an X-ray tube connected to the capacitor, characterized in that the device further comprises wave -tail energy regeneration means for regenerating, when X- ray emission from the X-ray tube is stopped , the charge energy that has accumulated in the capacitor and causes the wave-tail of the tube voltage from the secondary winding side of the high-voltage transformer to the primary winding side without passing through the high-voltage transformer.
Furthermore, the wave tail energy regeneration means may be configured to, when the X-ray radiation is stopped, remove the wave tail portion generated by the energy of the charge stored in the capacitor during the X-ray radiation, thereby rapidly lowering the tube voltage, and to regenerate the energy of the removed wave tail portion in the electric energy storage element on the primary winding side.
The wave tail energy recovery means may be configured to continue discharging the capacitor until the voltage across both ends of the capacitor becomes almost zero or negative.
With this configuration, when X-ray exposure is stopped, the energy of the charge stored in the capacitor is regenerated into the AC voltage source or other electrical energy storage element, so the conventional current limiting impedance, tetrode, and cooling devices for these are no longer necessary, making it possible to reduce the size of the high-voltage section of the X-ray high-voltage device and providing the advantage of being able to effectively utilize the power at this time.

【００１３】
また、前記回生する手段は、少なくとも第二の変圧器と、スイッチと、整流器と、を有し、前記第二の変圧器の一次巻線とスイッチとからなる直列接続体は、前記Ｘ線管のアノードとカソード間に接続され、前記整流器は、前記第二の変圧器の二次巻線に接続され、前記整流器の出力を前記交流電圧源若しくは他の電気エネルギー蓄積要素に接続してなり、この整流器の出力端子を前記コンデンサに蓄積された電荷のエネルギーを回生するための接続部に接続するものである。このように構成することによって、比較的簡単な構成で回生手段を実現できる。

［その他］
補正の根拠は明細書中、【００１８】と【００２１】にあります。 [0013]
The regenerating means has at least a second transformer, a switch, and a rectifier, wherein a series connection consisting of a primary winding of the second transformer and a switch is connected between the anode and cathode of the X-ray tube, the rectifier is connected to a secondary winding of the second transformer, the output of the rectifier is connected to the AC voltage source or other electric energy storage element, and the output terminal of the rectifier is connected to a connection part for regenerating the energy of the charge stored in the capacitor. By configuring in this way, the regenerating means can be realized with a relatively simple configuration.

[others]
The basis for the amendment is found in the specification at [0018] and [0021].

Claims

an AC voltage source;
a high voltage transformer having a primary winding connected to the AC voltage source to step up the voltage;
a high-voltage rectifier connected to the secondary winding of the high-voltage transformer to convert the boosted AC voltage into a high DC voltage;
a capacitor connected to the high voltage rectifier for smoothing the high DC voltage;
an X-ray tube connected to the capacitor;
In an X-ray high voltage device comprising:
an X-ray high voltage device comprising a wave tail energy regeneration means for regenerating, when the emission of X- rays from the X-ray tube is stopped , the energy of the charge stored in the capacitor that causes the wave tail of the tube voltage from the secondary winding side of the high voltage transformer to the primary winding side without passing through the high voltage transformer.

2. The X-ray high voltage device according to claim 1, wherein the wave-tail energy regeneration means comprises means for removing the wave-tail portion generated by the energy of the charge stored in the capacitor during the X-ray radiation , thereby rapidly lowering the tube voltage, when the X-ray radiation is stopped, and for regenerating the energy of the removed wave-tail portion into the electric energy storage element on the primary winding side.

3. The X-ray high voltage device according to claim 1, wherein the wave tail energy recovery means is configured to continue discharging the capacitor until the voltage across the capacitor becomes almost zero or negative.

The wave tail energy recovery means includes at least a second transformer, a switch, and a rectifier;
a series connection consisting of a primary winding of the second transformer and a switch is connected between the anode and cathode of the X-ray tube;
the rectifier is connected to a secondary winding of the second transformer;
2. An X-ray high voltage apparatus according to claim 1, wherein the output of said rectifier is connected to said AC voltage source or other electrical energy storage element.