JP2009139498A5 - - Google Patents

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JP2009139498A5
JP2009139498A5 JP2007313943A JP2007313943A JP2009139498A5 JP 2009139498 A5 JP2009139498 A5 JP 2009139498A5 JP 2007313943 A JP2007313943 A JP 2007313943A JP 2007313943 A JP2007313943 A JP 2007313943A JP 2009139498 A5 JP2009139498 A5 JP 2009139498A5
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output
voltage
drive frequency
forming apparatus
image forming
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JP2007313943A
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JP2009139498A (en
JP5123652B2 (en
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圧電トランスと、前記圧電トランスを駆動するための駆動周波数を生成する駆動周波数生成手段と、を有する電源装置を用いて電子写真方式の画像形成を実行する画像形成装置であって、当該電源装置が、
出力すべき電圧を設定する出力電圧設定手段と、
前記電源装置の出力電圧を検出する電圧検出手段と、
前記出力電圧設定手段により設定された設定電圧と前記電圧検出手段により検出された前記出力電圧とに基づき前記駆動周波数生成手段を制御する制御手段と、
前記電源装置の出力電流を検出する電流検出手段と、
前記電流検出手段により検出された出力電流が過電流であることを示す基準値を超えた場合に、予め定められた時間、前記制御手段の出力を切り替えて、前記駆動周波数生成手段の動作を制御する間欠保護動作手段と、
を備えることを特徴とする画像形成装置。 An image forming apparatus that performs electrophotographic image formation using a power supply device having a piezoelectric transformer and a drive frequency generating means for generating a drive frequency for driving the piezoelectric transformer, the power supply device ,
An output voltage setting means for setting a voltage to be output;
Voltage detection means for detecting an output voltage of the power supply device;
And control means for controlling the drive frequency generation means based on the detected the output voltage by the voltage detecting means and set the set voltage by the output voltage setting means,
Current detection means for detecting an output current of the power supply device;
When the output current detected by the current detection unit exceeds a reference value indicating that it is an overcurrent, the output of the control unit is switched for a predetermined time to control the operation of the drive frequency generation unit Intermittent protection operation means,
An image forming apparatus comprising: 前記間欠保護動作手段は、前記出力電流が前記基準値を超えた場合に、前記設定電圧を制御し、
前記制御手段は、前記間欠保護動作手段により制御された前記設定電圧と、前記出力電圧との入力に従い当該制御手段の出力を切り替え、前記予め定められた時間、前記駆動周波数生成手段の動作を停止させることを特徴とする請求項１に記載の画像形成装置。 The intermittent protection operation means controls the set voltage when the output current exceeds the reference value,
The control means switches the output of the control means according to the input of the set voltage controlled by the intermittent protection operation means and the output voltage, and stops the operation of the drive frequency generation means for the predetermined time. The image forming apparatus according to claim 1, wherein: 前記制御手段は、前記予め定められた時間の経過の後に、前記設定電圧と、前記出力電圧との入力に従い当該制御手段の出力を切り替え、前記駆動周波数生成手段の動作を回復させることを特徴とする請求項２に記載の画像形成装置。   The control means switches the output of the control means according to the input of the set voltage and the output voltage after the predetermined time has elapsed, and restores the operation of the drive frequency generating means. The image forming apparatus according to claim 2. 前記間欠保護動作手段は、前記電流検出手段により検出された電流が前記基準値を超えた場合に、前記出力電圧を制御し、
前記制御手段は、前記間欠保護動作手段により制御された前記出力電圧と、前記設定電圧との入力に従い当該制御手段の出力を切り替え、前記予め定められた時間、前記駆動周波数生成手段の動作を停止させることを特徴とする請求項１に記載の画像形成装置。 The intermittent protection operation means controls the output voltage when the current detected by the current detection means exceeds the reference value,
The control means switches the output of the control means according to the input of the output voltage controlled by the intermittent protection operation means and the set voltage, and stops the operation of the drive frequency generation means for the predetermined time. The image forming apparatus according to claim 1, wherein: 前記制御手段は、前記予め定められた時間の経過の後に、前記設定電圧と、前記出力電圧との入力に従い当該制御手段の出力を切り替え、前記駆動周波数生成手段の動作を回復させることを特徴とする請求項４に記載の画像形成装置。   The control means switches the output of the control means according to the input of the set voltage and the output voltage after the predetermined time has elapsed, and restores the operation of the drive frequency generating means. The image forming apparatus according to claim 4. 前記間欠保護動作手段は、前記出力電流が前記基準値を超えた場合に、前記予め定められた時間、前記制御手段の出力を制御して前記駆動周波数生成手段の動作の動作を停止させることを特徴とする請求項１に記載の画像形成装置。   The intermittent protection operation means controls the output of the control means to stop the operation of the drive frequency generation means for the predetermined time when the output current exceeds the reference value. The image forming apparatus according to claim 1, wherein: 前記間欠保護動作手段は、前記予め定められた時間の経過の後、前記制御手段の出力を制御して前記駆動周波数生成手段の動作の動作を回復させることを特徴とする請求項６に記載の画像形成装置。   The intermittent protection operation unit controls the output of the control unit to restore the operation of the drive frequency generation unit after the predetermined time has elapsed. Image forming apparatus. 圧電トランスと、前記圧電トランスを駆動するための駆動周波数を生成する駆動周波数生成手段と、を有する電源装置を用いて電子写真方式の画像形成を実行する画像形成装置であって、当該電源装置が、
出力すべき電流を設定する出力電流設定手段と、
前記電源装置の出力電流を検出する出力電流検出手段と、
前記出力電流設定手段により設定された設定電流に基づく電圧と、前記出力電流検出手段で検出された出力電流と、に基づき前記駆動周波数生成手段を制御する制御手段と、
前記電源装置の出力電圧を検出する電圧検出手段と、
前記出力電流検出手段により検出された前記出力電流が過電流であることを示す第１の基準値を超えた場合に、予め定められた時間、前記制御手段の出力を切り替えて、前記駆動周波数生成手段の動作を制御する間欠保護動作手段と、
前記電圧検出手段により検出された前記出力電圧が過電圧の状態を示す第２の基準値を超えた場合に、前記制御手段の出力を切り替えて、前記駆動周波数生成手段の動作を制御する過電圧検知手段と、
を備えることを特徴とする画像形成装置。 An image forming apparatus that performs electrophotographic image formation using a power supply device having a piezoelectric transformer and a drive frequency generating means for generating a drive frequency for driving the piezoelectric transformer, the power supply device ,
Output current setting means for setting the current to be output;
Output current detection means for detecting the output current of the power supply device;
Control means for controlling the drive frequency generation means based on the voltage based on the set current set by the output current setting means and the output current detected by the output current detection means;
Voltage detection means for detecting an output voltage of the power supply device;
When the output current detected by the output current detection unit exceeds a first reference value indicating that it is an overcurrent, the output of the control unit is switched for a predetermined time to generate the drive frequency Intermittent protection operation means for controlling the operation of the means;
When the output voltage detected by the voltage detection means exceeds a second reference value indicating an overvoltage state, the output of the control means is switched to control the operation of the drive frequency generation means. When,
An image forming apparatus comprising: 前記過電圧検知手段は、前記出力電圧が前記第２の基準値を超えた場合に前記設定電流に基づく電圧を制御し、
前記制御手段は、前記過電圧検知手段により制御された前記電圧と、前記出力電流検出手段の検出結果として出力される電圧と、の入力に従い当該制御手段の出力を切り替え、前記予め定められた時間、前記駆動周波数生成手段の動作を停止させることを特徴とする請求項８に記載の画像形成装置。 The overvoltage detection means controls the voltage based on the set current when the output voltage exceeds the second reference value;
The control means switches the output of the control means according to the input of the voltage controlled by the overvoltage detection means and the voltage output as a detection result of the output current detection means, and the predetermined time, The image forming apparatus according to claim 8 , wherein the operation of the drive frequency generation unit is stopped. 前記制御手段は、前記予め定められた時間の経過の後に、前記設定電流に基づく電圧と、前記出力電流検出手段の検出結果として出力される電圧と、の入力に従い当該制御手段の出力を切り替え、前記駆動周波数生成手段の動作を回復させることを特徴とする請求項９に記載の画像形成装置。 The control means switches the output of the control means according to the input of the voltage based on the set current and the voltage output as the detection result of the output current detection means after the elapse of the predetermined time, The image forming apparatus according to claim 9 , wherein the operation of the drive frequency generation unit is restored. 前記間欠保護動作手段は、前記出力電流が前記第１の基準値を超えた場合に、前記予め定められた時間、前記制御手段の出力を制御して前記駆動周波数生成手段の動作の動作を停止させることを特徴とする請求項８に記載の画像形成装置。 The intermittent protection operation means stops the operation of the drive frequency generation means by controlling the output of the control means for the predetermined time when the output current exceeds the first reference value. The image forming apparatus according to claim 8 , wherein: 前記間欠保護動作手段は、前記予め定められた時間の経過の後、前記制御手段の出力を制御して前記駆動周波数生成手段の動作の動作を回復させることを特徴とする請求項１１に記載の画像形成装置。 The intermittent protection operation means, after the lapse of time during which the predetermined according to claim 11, characterized in that to restore the operation of the operation of the drive frequency generation means to control the output of the control means Image forming apparatus.
JP2007313943A 2007-12-04 2007-12-04 Image forming apparatus Expired - Fee Related JP5123652B2 (en)

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JP2009139498A5 true JP2009139498A5 (en) 2011-01-27
JP5123652B2 JP5123652B2 (en) 2013-01-23

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JP2010123866A (en) 2008-11-21 2010-06-03 Sharp Corp Semiconductor device and method of manufacturing the same
JP6942518B2 (en) * 2017-04-28 2021-09-29 キヤノン株式会社 High-voltage generator and image forming device

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JP2842526B2 (en) * 1996-08-01 1999-01-06 日本電気株式会社 Drive circuit for piezoelectric transformer
JPH11187168A (en) * 1997-12-18 1999-07-09 Ricoh Co Ltd Compound machine
JP2000078741A (en) * 1998-09-02 2000-03-14 Tokin Corp Protective circuit for piezoelectric inverter
JP2000330431A (en) * 1999-05-20 2000-11-30 Canon Inc High-voltage power source device and image forming device
JP2000347541A (en) * 1999-06-03 2000-12-15 Canon Inc Power source device, control method thereof and image forming device using the device
JP2001356571A (en) * 2000-06-15 2001-12-26 Mitsubishi Heavy Ind Ltd Abnormal operation preventing device and method for electrifying device
JP2006201351A (en) * 2005-01-19 2006-08-03 Canon Inc Image forming apparatus
JP4420458B2 (en) * 2005-06-06 2010-02-24 キヤノン株式会社 High voltage power supply, image forming device
JP4766551B2 (en) * 2005-10-31 2011-09-07 株式会社リコー AC high voltage device, image forming device

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