JP2018206562A - X線高電圧装置、x線撮影装置、及び判定回路 - Google Patents
X線高電圧装置、x線撮影装置、及び判定回路 Download PDFInfo
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- 238000003384 imaging method Methods 0.000 claims description 11
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- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33573—Full-bridge at primary side of an isolation transformer
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- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4429—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units
- A61B6/4435—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units the source unit and the detector unit being coupled by a rigid structure
- A61B6/4441—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units the source unit and the detector unit being coupled by a rigid structure the rigid structure being a C-arm or U-arm
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- A—HUMAN NECESSITIES
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- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/56—Details of data transmission or power supply, e.g. use of slip rings
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- A61B6/56—Details of data transmission or power supply, e.g. use of slip rings
- A61B6/563—Details of data transmission or power supply, e.g. use of slip rings involving image data transmission via a network
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- A—HUMAN NECESSITIES
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- A61B6/58—Testing, adjusting or calibrating thereof
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- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
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Abstract
【解決手段】実施形態に係るX線高電圧装置は、インバータ回路と、パワーデバイスと、PWM(Pulse Width Modulation)制御回路と、判定回路と、通知部とを備える。インバータ回路は、X線を発生するX線管に出力する出力電圧を制御する。パワーデバイスは、前記インバータ回路に備えられ、前記出力電圧を制御するためのスイッチングを行う。PWM制御回路は、前記出力電圧に応じて、前記パワーデバイスのスイッチングをON時間により制御する。判定回路は、前記ON時間が閾値を超えたか否かを判定する。通知部は、前記判定回路による判定結果を通知する。
【選択図】図1
Description
まず、図1を用いて、第1の実施形態に係るX線診断装置100の構成の一例を説明する。図1は、第1の実施形態に係るX線診断装置100の構成の一例を示すブロック図である。
第1の実施形態では、インバータ電流に影響を与える因子であるX線条件及び電源電圧が一定である場合を説明したが、実施形態はこれに限定されるものではない。例えば、X線診断装置100は、インバータ電流に影響を与える因子の変化に応じて閾値を補正することで、適切な閾値を設定することができる。
上述した実施形態以外にも、種々の異なる形態にて実施されてもよい。
例えば、寿命判定回路115は、X線高電圧装置11の据付時におけるパワーデバイスのON時間に基づいて、閾値を設定してもよい。
また、例えば、寿命判定回路115は、X線高電圧装置11のウォームアップ運転時におけるON時間が閾値を超えたか否かを判定してもよい。
なお、上述した実施形態では、X線高電圧装置11がX線診断装置100に適用される場合を説明したが、実施形態はこれに限定されるものではない。例えば、X線高電圧装置11は、X線管120が搭載されるX線撮影装置であれば適用可能である。X線撮影装置には、例えば、X線診断装置100の他に、X線CT装置が含まれる。
また、上述した実施形態では、予めX線高電圧装置11がX線撮影装置に備えられる場合を説明したが、実施形態はこれに限定されるものではない。例えば、X線高電圧装置11は、既存のX線高電圧装置に対して寿命判定回路115を組み込むことによっても実現可能である。つまり、本実施形態に係るX線高電圧装置11は、製品出荷後のX線撮影装置に備えられるX線高電圧装置に対して、付加的に寿命判定回路115を組み込むことによっても実現可能である。
110 PWM回路
112 インバータ回路
112A〜112D IGBT
115 寿命判定回路
Claims (7)
- X線を発生するX線管に出力する出力電圧を制御するインバータ回路と、
前記インバータ回路に備えられ、前記出力電圧を制御するためのスイッチングを行うパワーデバイスと、
前記出力電圧に応じて、前記パワーデバイスのスイッチングをON時間により制御するPWM(Pulse Width Modulation)回路と、
前記ON時間が閾値を超えたか否かを判定する判定回路と、
前記判定回路による判定結果を通知する通知部と
を備える、X線高電圧装置。 - 前記インバータ回路に供給されるインバータ電流に影響を与える因子に基づいて、前記閾値を補正する補正回路を更に備える、
請求項1に記載のX線高電圧装置。 - 前記補正回路は、前記因子として、前記X線高電圧装置に接続される電源の電源電圧、電源ケーブル長、電源インピーダンス、及び前記インバータ回路の温度のうち少なくとも一つに基づいて、前記閾値を補正する、
請求項2に記載のX線高電圧装置。 - 前記判定回路は、前記X線高電圧装置の据付時における前記パワーデバイスのON時間に基づいて、前記閾値を設定する、
請求項1〜3のいずれか一つに記載のX線高電圧装置。 - 前記判定回路は、前記X線高電圧装置のウォームアップ運転時における前記ON時間が前記閾値を超えたか否かを判定する、
請求項1〜4のいずれか一つに記載のX線高電圧装置。 - X線を発生するX線管に出力する出力電圧を制御するインバータ回路と、
前記インバータ回路に備えられ、前記出力電圧を制御するためのスイッチングを行うパワーデバイスと、
前記出力電圧に応じて、前記パワーデバイスのスイッチングをON時間により制御するPWM(Pulse Width Modulation)回路と、
前記ON時間が閾値を超えたか否かを判定する判定回路と、
前記判定回路による判定結果を通知する通知部と
を備える、X線撮影装置。 - PWM(Pulse Width Modulation)制御により電圧を制御するためのインバータ回路内のパワーデバイスのON時間が、閾値を超えたか否かを判定する、判定回路。
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US15/994,130 US10595389B2 (en) | 2017-06-01 | 2018-05-31 | X-ray high voltage generator, X-ray imaging apparatus, assessing circuit, and medical power supply device |
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DE102021206869B3 (de) * | 2021-06-30 | 2022-09-15 | Siemens Healthcare Gmbh | Verfahren und Lastrechner zum Bereitstellen einer Temperatur-Information für einen Hochspannungsgenerator eines medizinischen Bildgebungsgeräts |
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JP2002005989A (ja) * | 2000-06-20 | 2002-01-09 | Meidensha Corp | 電力用半導体素子の劣化判断方法 |
JP2005327603A (ja) * | 2004-05-14 | 2005-11-24 | Hitachi Medical Corp | X線高電圧装置及びac−dcコンバータ |
JP2011023569A (ja) * | 2009-07-16 | 2011-02-03 | Fuji Electric Systems Co Ltd | パワーモジュール |
JP2013142704A (ja) * | 2012-01-11 | 2013-07-22 | Abb Research Ltd | Igbtデバイスの動作状態を実時間で監視するシステムと方法 |
JP2016208742A (ja) * | 2015-04-24 | 2016-12-08 | 株式会社デンソー | 電力変換装置 |
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US4589501A (en) * | 1979-10-15 | 1986-05-20 | Ingersoll-Rand | Offset driver accessory |
US4597026A (en) * | 1983-12-22 | 1986-06-24 | General Electric Company | Inverter variable dead time for X-ray generator |
US7233645B2 (en) * | 2003-03-04 | 2007-06-19 | Inpho, Inc. | Systems and methods for controlling an X-ray source |
JP6150995B2 (ja) | 2012-09-11 | 2017-06-21 | 東芝メディカルシステムズ株式会社 | 医用装置及びx線高電圧装置 |
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JP2002005989A (ja) * | 2000-06-20 | 2002-01-09 | Meidensha Corp | 電力用半導体素子の劣化判断方法 |
JP2005327603A (ja) * | 2004-05-14 | 2005-11-24 | Hitachi Medical Corp | X線高電圧装置及びac−dcコンバータ |
JP2011023569A (ja) * | 2009-07-16 | 2011-02-03 | Fuji Electric Systems Co Ltd | パワーモジュール |
JP2013142704A (ja) * | 2012-01-11 | 2013-07-22 | Abb Research Ltd | Igbtデバイスの動作状態を実時間で監視するシステムと方法 |
JP2016208742A (ja) * | 2015-04-24 | 2016-12-08 | 株式会社デンソー | 電力変換装置 |
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