JP5215040B2 - 漏電検出回路 - Google Patents
漏電検出回路 Download PDFInfo
- Publication number
- JP5215040B2 JP5215040B2 JP2008137645A JP2008137645A JP5215040B2 JP 5215040 B2 JP5215040 B2 JP 5215040B2 JP 2008137645 A JP2008137645 A JP 2008137645A JP 2008137645 A JP2008137645 A JP 2008137645A JP 5215040 B2 JP5215040 B2 JP 5215040B2
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- JP
- Japan
- Prior art keywords
- voltage
- leakage
- detection
- potential side
- power supply
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-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measurement Of Current Or Voltage (AREA)
Description
第2高電位側漏電検出期間において、次式(2)が成り立つ。
I1=(Vin1−Vin0)/R4、I2=(Vin2−Vin0)/R4、Vin0は漏れ電流I0による検出抵抗R4の両端電圧であり、一定であり、式(1),(2)より、式(3)が成り立つ。
・・・ (3)
高電位側漏電抵抗算出手段64は、第2高電位側漏電検出期間において、式(3)から、高電位側漏電抵抗RLpを算出する。
I3=(Vs−Vin3)/R4である。
尚、制限抵抗R1と並列に制限抵抗R1に比べて十分小さい抵抗及び抵抗に直列にダイオードを設け、低電位側漏電電流を調整する場合は、Vref1を(Vref1−Vf)とする。抵抗R1を並列抵抗の抵抗値とする。Vfはダイオードの順方向降下電圧である。
R1 制限抵抗
Q1 FET
R4 検出抵抗
20 定電流回路
22 電流検出回路
24 可変電源
26 オフセット切替部
34 増幅器
Claims (2)
- 一端が直流電源より直流電圧が供給される装置を収容する導体に接続され、他端が前記直流電源の負極に接続された電流経路を備え、
前記電流経路は、電流を制限する制限抵抗と、第1電極、第2電極及び制御電極を有し、前記第1及び第2電極間の導通が制御されるスイッチ素子と、前記電流経路に流れる電流を検出する検出抵抗と、漏電を検出するための複数の漏電検出用基準電圧が切り替えられ、負極が前記直流電源の負極に接続された可変直流電源とを備え、
前記検出抵抗の両端の電圧を増幅する増幅器を更に備え、
前記増幅器により増幅された前記検出抵抗の両端の電圧に基づいて、前記導体と前記直流電源との間の漏電を検出する漏電検出回路において、
前記スイッチ素子の前記制御電極の電圧と、前記可変直流電源の正極の電圧との間の電位差を一定にする定電圧回路を備え、
前記直流電源の正極と前記導体との間の高電位側漏電を検出する際に、第1及び第2漏電検出用基準電圧が前記可変直流電源より出力されるよう前記可変直流電源に制御信号を出力し、前記第1漏電検出用基準電圧における前記検出抵抗の両端の第1検出電圧と前記第2漏電検出用基準電圧における前記検出抵抗の両端の第2検出電圧の差分に基づき、前記直流電源の正極と前記導体との間の高電位側漏電抵抗を算出し、前記高電位側漏電を検出することを特徴とする漏電検出回路。 - 前記スイッチ素子は電界効果型トランジスタである請求項1記載の漏電検出回路。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008137645A JP5215040B2 (ja) | 2008-05-27 | 2008-05-27 | 漏電検出回路 |
US12/469,116 US8004284B2 (en) | 2008-05-27 | 2009-05-20 | Leak detecting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008137645A JP5215040B2 (ja) | 2008-05-27 | 2008-05-27 | 漏電検出回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009286156A JP2009286156A (ja) | 2009-12-10 |
JP5215040B2 true JP5215040B2 (ja) | 2013-06-19 |
Family
ID=41379006
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008137645A Expired - Fee Related JP5215040B2 (ja) | 2008-05-27 | 2008-05-27 | 漏電検出回路 |
Country Status (2)
Country | Link |
---|---|
US (1) | US8004284B2 (ja) |
JP (1) | JP5215040B2 (ja) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5215040B2 (ja) * | 2008-05-27 | 2013-06-19 | 株式会社ケーヒン | 漏電検出回路 |
US9024639B2 (en) * | 2011-03-31 | 2015-05-05 | Elite Power Solutions Llc | Ground fault detection system |
JP2012242330A (ja) * | 2011-05-23 | 2012-12-10 | Omron Automotive Electronics Co Ltd | 漏電検知装置 |
JP5767077B2 (ja) * | 2011-10-24 | 2015-08-19 | 株式会社ケーヒン | 漏電検出装置 |
US9234931B2 (en) * | 2013-03-08 | 2016-01-12 | Caterpillar Inc. | Fault detection system with leakage current detection |
JP6255691B2 (ja) * | 2013-03-29 | 2018-01-10 | 株式会社ケーヒン | 電流センサ/コンタクタユニット |
US10725115B2 (en) * | 2014-10-16 | 2020-07-28 | Ford Global Technologies, Llc | Methods and apparatus for detecting electrical leakage in a vehicle |
US9630520B2 (en) * | 2015-01-13 | 2017-04-25 | Ford Global Technologies, Llc | Circuit and method for battery leakage detection |
JP6337789B2 (ja) * | 2015-02-04 | 2018-06-06 | 株式会社オートネットワーク技術研究所 | 電流検出回路、電流検出装置及び切替え装置 |
KR101746141B1 (ko) * | 2015-03-10 | 2017-06-13 | 주식회사 엘지화학 | 절연저항측정 장치 및 방법 |
US10274530B2 (en) * | 2015-07-22 | 2019-04-30 | Honeywell International Inc. | System and method for dynamic ground fault detection |
US9931960B2 (en) * | 2015-09-11 | 2018-04-03 | Ford Global Technologies, Llc | Electric or hybrid vehicle battery pack voltage measurement functional assessment and redundancy |
CN204915554U (zh) * | 2015-09-18 | 2015-12-30 | 泰科电子(上海)有限公司 | 感应电路、混合驱动电路及感应器组件 |
KR102037194B1 (ko) * | 2016-04-28 | 2019-10-28 | 후아웨이 테크놀러지 컴퍼니 리미티드 | 단락 방지 검출 장치 및 사용자 단말기 |
US10516189B2 (en) * | 2016-11-15 | 2019-12-24 | Ford Global Technologies, Llc | High voltage bus contactor fault detection |
DE102017205403A1 (de) * | 2017-03-30 | 2018-10-04 | Audi Ag | System mit einer Hochvoltbatterie und einer Kopplungsvorrichtung, Kraftfahrzeug sowie Verfahren zum Betreiben einer Kopplungsvorrichtung |
CN109787305B (zh) * | 2017-11-14 | 2024-05-14 | 华为技术有限公司 | 充电装置及充电系统 |
CN107953794A (zh) * | 2017-12-01 | 2018-04-24 | 北京长城华冠汽车科技股份有限公司 | 汽车电气系统 |
US10634713B2 (en) * | 2018-02-22 | 2020-04-28 | Piecemakers Technology, Inc. | Method for testing semiconductor die pad untouched by probe and related test circuit |
DE102018221479A1 (de) * | 2018-12-12 | 2020-06-18 | Robert Bosch Gmbh | Schaltungsanordnung zur Fehlererkennung in einem ungeerdeten Hochvoltsystem |
CN109633411B (zh) * | 2018-12-21 | 2021-04-30 | 中国北方车辆研究所 | 一种特种车辆用高压配电电路状态检测系统 |
CN114236422B (zh) * | 2021-12-16 | 2024-06-25 | 成都思瑞浦微电子科技有限公司 | 漏电检测电路 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4768371A (en) * | 1985-12-06 | 1988-09-06 | Ceramatec, Inc. | Leak detector |
JP2803499B2 (ja) * | 1992-11-26 | 1998-09-24 | 日本電気株式会社 | アナログ・デジタルcmos集積回路 |
JP3233037B2 (ja) * | 1996-08-26 | 2001-11-26 | 株式会社村田製作所 | 絶縁抵抗測定装置 |
TW403838B (en) * | 1997-10-30 | 2000-09-01 | Matsushita Electric Ind Co Ltd | Electric leak detecting method and apparatus for electric motorcars |
JP3594562B2 (ja) * | 2001-03-30 | 2004-12-02 | 三洋電機株式会社 | 電源装置の漏電検出回路 |
JP2004361137A (ja) * | 2003-06-02 | 2004-12-24 | Bae Systems Controls Inc | 接地故障検出システム |
JP4421990B2 (ja) * | 2004-09-30 | 2010-02-24 | スガツネ工業株式会社 | 漏電検出装置 |
JP2006349424A (ja) * | 2005-06-14 | 2006-12-28 | Toyoji Ahei | 漏洩電流検出システム及び方法 |
JP4705495B2 (ja) * | 2006-03-23 | 2011-06-22 | 株式会社ケーヒン | 漏電検出回路およびバッテリ電子制御装置 |
US8552733B2 (en) * | 2008-04-14 | 2013-10-08 | Kefico Corporation | Electrical leak detecting apparatus for an electric vehicle |
JP5215040B2 (ja) * | 2008-05-27 | 2013-06-19 | 株式会社ケーヒン | 漏電検出回路 |
-
2008
- 2008-05-27 JP JP2008137645A patent/JP5215040B2/ja not_active Expired - Fee Related
-
2009
- 2009-05-20 US US12/469,116 patent/US8004284B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US20090295401A1 (en) | 2009-12-03 |
US8004284B2 (en) | 2011-08-23 |
JP2009286156A (ja) | 2009-12-10 |
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