JP6299740B2 - 過電流保護回路 - Google Patents
過電流保護回路 Download PDFInfo
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- JP6299740B2 JP6299740B2 JP2015254265A JP2015254265A JP6299740B2 JP 6299740 B2 JP6299740 B2 JP 6299740B2 JP 2015254265 A JP2015254265 A JP 2015254265A JP 2015254265 A JP2015254265 A JP 2015254265A JP 6299740 B2 JP6299740 B2 JP 6299740B2
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/093—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current with timing means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/093—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current with timing means
- H02H3/0935—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current with timing means the timing being determined by numerical means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
- H02H3/243—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage for DC systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
- H02H3/247—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage having timing means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/041—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature additionally responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
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Description
本発明の第1実施形態について説明する。本実施形態では、ワイヤ(ワイヤハーネス)を保護対象とする過電流検出回路、すなわち過電流が流れることによってワイヤが発煙することを抑制する過電流保護回路を例に挙げて説明する。
本発明は上記した実施形態に限定されるものではなく、特許請求の範囲に記載した範囲内において適宜変更が可能である。
2 半導体スイッチ
3 負荷
4 ワイヤ
5 保護回路
6 電源回路
7 電圧検出回路
8 入力回路
9 変換回路
10 フィルタ回路
11 マイコン
Claims (9)
- 電源電圧(Vbatt)に基づいて負荷(3)を駆動する負荷駆動部(2)と、
前記負荷(3)および前記負荷駆動部(2)に接続されるワイヤ(4)と、
前記負荷(3)に流れる電流の値である負荷電流(Iout)を検出し、該負荷電流(Iout)に対応するセンス電圧を出力する電流検出部(9)と、
前記電源電圧(Vbatt)を検出する電圧検出部(7)と、
前記負荷駆動部の制御を行うことで前記負荷(3)の駆動を制御し、前記検出部(9)で検出されたセンス電圧に基づいて加減算値を決定すると共に、前記加減算値を用いて加減算を行った積算値が判定閾値を超えると、前記負荷駆動部(2)を制御して前記負荷電流(Iout)を遮断し、前記負荷(3)の駆動を停止することで保護対象を過電流から保護する制御部(11)と、を有し、
前記制御部(11)は、前記電源電圧(Vbatt)の低下を検出したときに前記積算値が前記判定閾値を超えて前記負荷電流(Iout)を遮断したときには、遮断してからの経過時間に基づいて前記積算値を減算し、該電源電圧(Vbatt)が低下した後に所定電圧まで上昇したときに、前記負荷駆動部(2)を制御して前記負荷(3)の駆動を再開すると共に減算した前記積算値を補正前積算値として、該補正前積算値を補正して該補正前積算値よりも低い値となる補正後積算値を演算し、該補正後積算値から前記加減算を行うことを特徴とする過電流保護回路。 - 前記制御部(11)は、前記補正後積算値を前記補正前積算値の1/2に設定することを特徴とする請求項1に記載の過電流保護回路。
- 前記制御部(11)は、前記補正後積算値を0に設定することを特徴とする請求項1に記載の過電流保護回路。
- 前記制御部(11)は、前記補正後積算値を前記判定閾値の1/2に設定することを特徴とする請求項1に記載の過電流保護回路。
- 電源電圧(Vbatt)に基づいて負荷(3)を駆動する負荷駆動部(2)と、
前記負荷(3)および前記負荷駆動部(2)に接続されるワイヤ(4)と、
前記負荷(3)に流れる電流の値である負荷電流(Iout)を検出し、該負荷電流(Iout)に対応するセンス電圧を出力する電流検出部(9)と、
前記電源電圧(Vbatt)を検出する電圧検出部(7)と、
前記負荷駆動部の制御を行うことで前記負荷(3)の駆動を制御し、前記検出部(9)で検出されたセンス電圧に基づいて加減算値を決定すると共に、前記加減算値を用いて加減算を行った積算値が判定閾値を超えると、前記負荷駆動部(2)を制御して前記負荷電流(Iout)を遮断し、前記負荷(3)の駆動を停止することで保護対象を過電流から保護する制御部(11)と、を有し、
前記制御部(11)は、前記電源電圧(Vbatt)の低下を検出したときに前記積算値が前記判定閾値を超えて前記負荷電流(Iout)を遮断したときには、遮断してからの経過時間に基づいて前記積算値を減算し、該電源電圧(Vbatt)が低下した後に所定電圧まで上昇したときに、前記負荷駆動部(2)を制御して前記負荷(3)の駆動を再開すると共に減算した前記積算値を補正前積算値として、該補正前積算値を補正して該補正前積算値よりも低い値となる補正後積算値を演算することと、減算した前記積算値を補正後積算値に設定することとを含み、前記補正後積算値から前記加減算を行うことを特徴とする過電流保護回路。 - 前記制御部(11)は、前記電源電圧(Vbatt)がリセット電圧以下になると前記積算値を0にすると共に前記負荷(3)を駆動していれば前記負荷電流(Iout)を遮断して前記負荷(3)の駆動を停止し、前記積算値を0にした後に前記電源電圧(Vbatt)が前記リセット電圧よりも大きな所定電圧まで上昇したときに、前記負荷駆動部(2)を制御して前記負荷(3)の駆動を再開すると共に前記積算値を0よりも前記判定閾値に近い補正値に設定し、該補正値から前記加減算を行うことを特徴とする請求項1ないし5のいずれか1つに記載の過電流保護回路。
- 電源電圧(Vbatt)に基づいて負荷(3)を駆動する負荷駆動部(2)と、
前記負荷(3)および前記負荷駆動部(2)に接続されるワイヤ(4)と、
前記負荷(3)に流れる電流の値である負荷電流(Iout)を検出し、該負荷電流(Iout)に対応するセンス電圧を出力する電流検出部(9)と、
前記電源電圧(Vbatt)を検出する電圧検出部(7)と、
前記負荷駆動部の制御を行うことで前記負荷(3)の駆動を制御し、前記検出部(9)で検出されたセンス電圧に基づいて加減算値を決定すると共に、前記加減算値を用いて加減算を行った積算値が判定閾値を超えると、前記負荷駆動部(2)を制御して前記負荷電流(Iout)を遮断し、前記負荷(3)の駆動を停止することで保護対象を過電流から保護する制御部(11)と、を有し、
前記制御部(11)は、前記電源電圧(Vbatt)がリセット電圧以下になると前記積算値を0にすると共に前記負荷(3)を駆動していれば前記負荷電流(Iout)を遮断して前記負荷(3)の駆動を停止し、前記積算値を0にした後に前記電源電圧(Vbatt)が前記リセット電圧よりも大きな所定電圧まで上昇したときに、前記負荷駆動部(2)を制御して前記負荷(3)の駆動を再開すると共に前記積算値を0よりも前記判定閾値に近い補正値に設定し、該補正値から前記加減算を行うことを特徴とする過電流保護回路。 - 電源電圧(Vbatt)に基づいて負荷(3)を駆動する負荷駆動部(2)と、
前記負荷(3)および前記負荷駆動部(2)に接続されるワイヤ(4)と、
前記負荷(3)に流れる電流の値である負荷電流(Iout)を検出し、該負荷電流(Iout)に対応するセンス電圧を出力する電流検出部(9)と、
前記電源電圧(Vbatt)を検出する電圧検出部(7)と、
前記負荷駆動部の制御を行うことで前記負荷(3)の駆動を制御し、前記検出部(9)で検出されたセンス電圧に基づいて加減算値を決定すると共に、前記加減算値を用いて加減算を行った積算値が判定閾値を超えると、前記負荷駆動部(2)を制御して前記負荷電流(Iout)を遮断し、前記負荷(3)の駆動を停止することで保護対象を過電流から保護する制御部(11)と、を有し、
前記制御部(11)は、前記電源電圧(Vbatt)がリセット電圧以下になると前記積算値を0にすると共に前記負荷(3)を駆動していれば前記負荷電流(Iout)を遮断して前記負荷(3)の駆動を停止し、前記積算値を0にした後に前記電源電圧(Vbatt)が前記リセット電圧よりも大きな所定電圧まで上昇したときに、前記負荷駆動部(2)を制御して前記負荷(3)の駆動を再開すると共に前記積算値を0よりも前記判定閾値に近い補正値に設定することと、前記積算値を補正値として0に設定することとを含み、前記補正値から前記加減算を行うことを特徴とする過電流保護回路。 - 前記制御部(11)は、前記補正値を前記判定閾値の1/2に設定することを特徴とする請求項7に記載の過電流保護回路。
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JP2015254265A JP6299740B2 (ja) | 2015-12-25 | 2015-12-25 | 過電流保護回路 |
US15/382,768 US9871367B2 (en) | 2015-12-25 | 2016-12-19 | Overcurrent protection circuit |
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JP2015254265A JP6299740B2 (ja) | 2015-12-25 | 2015-12-25 | 過電流保護回路 |
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JP6498473B2 (ja) * | 2015-02-24 | 2019-04-10 | ローム株式会社 | スイッチ駆動回路 |
DE102015121194A1 (de) * | 2015-12-04 | 2017-06-08 | Infineon Technologies Ag | Vorrichtung mit integriertem Schutzverlauf und Verfahren |
JP2018085857A (ja) * | 2016-11-24 | 2018-05-31 | アンデン株式会社 | 過電流保護装置 |
JP6707054B2 (ja) * | 2017-04-06 | 2020-06-10 | 株式会社デンソーテン | 過電流保護装置及び車両用電子制御ユニット |
DE102018219745A1 (de) | 2018-11-19 | 2020-05-20 | Zf Friedrichshafen Ag | Steuern eines Bordnetzes eines Kraftfahrzeugs |
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JPS61273122A (ja) * | 1985-05-24 | 1986-12-03 | 株式会社東芝 | 過電流保護継電装置 |
JP3363074B2 (ja) * | 1997-08-08 | 2003-01-07 | 株式会社オートネットワーク技術研究所 | 過電流検知回路 |
JP3749139B2 (ja) * | 2001-04-23 | 2006-02-22 | 三洋電機株式会社 | インバータ保護装置 |
US20030080772A1 (en) * | 2001-08-31 | 2003-05-01 | Davide Giacomini | Programmable compact motor drive module |
CN100521437C (zh) * | 2002-04-24 | 2009-07-29 | 三洋电机株式会社 | 装有过流保护电路的混合集成电路装置 |
JP2008092784A (ja) * | 2006-07-28 | 2008-04-17 | Mitsuba Corp | ブラシレスモータの駆動装置及びブラシレスモータの始動方法並びにブラシレスモータのロータ停止位置検出方法 |
US20110157752A1 (en) * | 2008-09-08 | 2011-06-30 | Mitsubishi Electric Corporation | Overcurrent detection circuit, inverter, compressor, and air-conditioning machine, and adjusting method for adjusting overcurrent detection circuit |
JP5315155B2 (ja) * | 2009-07-23 | 2013-10-16 | 日立オートモティブシステムズ株式会社 | 半導体素子制御装置、車載用電機システム |
JP5482055B2 (ja) | 2009-09-25 | 2014-04-23 | 株式会社オートネットワーク技術研究所 | 電力供給制御装置 |
JP5351793B2 (ja) * | 2010-02-05 | 2013-11-27 | 矢崎総業株式会社 | 過電流保護装置及び過電流保護システム |
US9225158B2 (en) * | 2011-09-14 | 2015-12-29 | Denso Corporation | Overcurrent protection circuit |
JP6133019B2 (ja) * | 2011-09-28 | 2017-05-24 | アンデン株式会社 | 過電流保護回路 |
US9013123B2 (en) * | 2013-04-22 | 2015-04-21 | Rockwell Automation Technologies, Inc. | Self protected dynamic braking |
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2015
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