JP6707054B2 - 過電流保護装置及び車両用電子制御ユニット - Google Patents
過電流保護装置及び車両用電子制御ユニット Download PDFInfo
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- JP6707054B2 JP6707054B2 JP2017076253A JP2017076253A JP6707054B2 JP 6707054 B2 JP6707054 B2 JP 6707054B2 JP 2017076253 A JP2017076253 A JP 2017076253A JP 2017076253 A JP2017076253 A JP 2017076253A JP 6707054 B2 JP6707054 B2 JP 6707054B2
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- overcurrent
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- 238000001514 detection method Methods 0.000 claims description 48
- 239000003990 capacitor Substances 0.000 description 10
- 230000000903 blocking effect Effects 0.000 description 8
- 239000000779 smoke Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000003321 amplification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/04—Cutting off the power supply under fault conditions
-
- 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
- H02H3/085—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 making use of a thermal sensor, e.g. thermistor, heated by the excess current
-
- 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
- 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
- H02H7/20—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 electronic equipment
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Description
図1は、本発明による過電流保護装置の一実施の形態を備える電子制御ユニットを搭載した車両を示す図である。車両1に搭載された電子制御ユニット(ECU)2に接続された負荷3には、ワイヤーハーネス(図示せず)によりECU2に接続された常時電源(図示せず)により電圧VINが印加される。ECU2は、例えば、オーディオ装置、ナビゲーション装置等を制御するECUであり、負荷3は、例えば、オーディオ装置、ナビゲーション装置等のパワーアンプである。
2,2’ ECU
3 負荷
11 シャント抵抗
12 電流センスアンプ
13,13’ 過電流保護装置
14 PMOSトランジスタ
15 サーミスタ
16,21a,21b,21c,21d,22d,22e,22f,22g,22h,22i,32,34,35 抵抗
21 過電流検出部
21e,21f コンパレータ
21g コンデンサ
22 過電流遮断部
22a,22b,33 npnトランジスタ
22c pnpトランジスタ
23,23’ マイクロコンピュータ
23a,23b,23c,23d,23e 端子
31 ダイオード
Claims (5)
- 負荷を過電流から保護する過電流保護装置であって、
前記過電流の検出を、前記負荷に流れる電流の値、前記負荷に電流が流れる時間及び前記負荷の非作動時の過電流遮断特性に基づいて行う第1の過電流検出部と、
前記負荷の作動時の前記過電流の検出を、前記負荷の作動時に前記負荷に流れる電流の値、前記負荷の作動時に前記負荷に電流が流れる時間及び前記負荷の作動時の過電流遮断特性に基づいて行う第2の過電流検出部と、
前記第1の過電流検出部が前記過電流を検出したときに前記負荷への前記過電流を遮断するとともに前記第2の過電流検出部が前記過電流を検出したときに前記負荷への前記過電流を遮断する過電流遮断部と、
を備え、
前記第2の過電流検出部は、マイクロコンピュータによって構成され、
前記負荷の作動時は、前記マイクロコンピュータが作動状態であるときであり、前記負荷の非作動時は、前記マイクロコンピュータがスリープ状態又は非アクティブ状態であるときである過電流保護装置。 - 前記第1の過電流検出部は、前記負荷の非作動時に前記負荷に流れる電流の値が第1の閾値より大きい時間が第2の閾値より大きいときに前記過電流を検出し、前記第1の閾値及び前記第2の閾値は、前記負荷の非作動時の過電流遮断特性によって決定され、
前記第2の過電流検出部は、前記負荷の作動時に前記負荷に流れる電流の値が第3の閾値より大きい時間が第4の閾値より大きいときに前記過電流を検出し、前記第3の閾値及び前記第4の閾値は、前記負荷の作動時の過電流遮断特性によって決定され、前記第3の閾値は、前記第1の閾値より小さく、前記第4の閾値は、前記第2の閾値より大きい請求項1に記載の過電流保護装置。 - 前記第1の過電流検出部は、前記過電流の検出を前記負荷の非作動時に行い、前記過電流の検出を前記負荷の作動時に停止する請求項1に記載の過電流保護装置。
- 前記負荷の作動時の過電流遮断特性は、周囲温度に応じて決定される請求項1〜3のいずれか一項に記載の過電流保護装置。
- 請求項1〜4のいずれか一項に記載の過電流保護装置を有する車両用電子制御ユニット。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017076253A JP6707054B2 (ja) | 2017-04-06 | 2017-04-06 | 過電流保護装置及び車両用電子制御ユニット |
US15/888,419 US10615586B2 (en) | 2017-04-06 | 2018-02-05 | Overcurrent protection device and vehicular electronic control unit |
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JP2017076253A JP6707054B2 (ja) | 2017-04-06 | 2017-04-06 | 過電流保護装置及び車両用電子制御ユニット |
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JP2018182835A JP2018182835A (ja) | 2018-11-15 |
JP6707054B2 true JP6707054B2 (ja) | 2020-06-10 |
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JP (1) | JP6707054B2 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7131211B2 (ja) * | 2018-08-30 | 2022-09-06 | 株式会社オートネットワーク技術研究所 | 給電制御装置 |
CN109768524A (zh) * | 2018-12-18 | 2019-05-17 | 深圳市优必选科技有限公司 | 一种用于高压系统的电流保护电路及电流保护方法 |
CN109713638B (zh) * | 2018-12-27 | 2021-04-02 | 惠科股份有限公司 | 一种显示面板及其过流保护方法和显示装置 |
US11251600B2 (en) * | 2020-02-13 | 2022-02-15 | Honeywell International Inc. | Overvoltage protection combined with overcurrent protection |
US11605945B2 (en) | 2020-03-18 | 2023-03-14 | Samsung Sdi Co., Ltd. | Pyro igniter circuit and testing method |
CN114069551B (zh) * | 2020-08-06 | 2023-06-23 | 光宝电子(广州)有限公司 | 多阶层过电流保护电路 |
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JP2009011031A (ja) | 2007-06-26 | 2009-01-15 | Tokai Rika Co Ltd | 負荷駆動制御回路 |
JP2010283977A (ja) * | 2009-06-04 | 2010-12-16 | Yazaki Corp | 負荷回路の保護装置 |
JP2011061948A (ja) * | 2009-09-09 | 2011-03-24 | Renesas Electronics Corp | 半導体装置および回路保護方法 |
US20120169117A1 (en) * | 2011-01-04 | 2012-07-05 | Jong-Doo Park | Battery system and electric vehicle including the same |
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JP2018182835A (ja) | 2018-11-15 |
US10615586B2 (en) | 2020-04-07 |
US20180294635A1 (en) | 2018-10-11 |
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