PROBLEM TO BE SOLVED: To provide an electric leak detector for a vehicle, which can appropriately determine a leakage by calculating a determination threshold based on a voltage at one terminal of a coupling capacitor and an atmospheric temperature thereof during leakage determination.SOLUTION: An electric leak detector 108 for a vehicle includes a coupling capacitor 210 that has a terminal A connected to an on-vehicle high voltage device 110 and a terminal B connected to a repetitive signal output circuit 212. The coupling capacitor 210 repetitively performs a charge operation and a discharge operation in response to a repetitive signal PLS. Determination thresholds are calculated based on a voltage applied to the terminal A of the coupling capacitor 210 and an atmospheric temperature. A detected charge period and a detected discharge period are compared with the determination thresholds, to thereby determine a leakage state.SELECTED DRAWING: Figure 2
【課題】漏電判定中にカップリングコンデンサの一端の電圧及び雰囲気温度から判定しきい値を求めることで、漏電を適切に判定する。【解決手段】車両用漏電検出装置108は、端子Aが車載高電圧機器110に接続され、端子Bが反復信号出力回路212に接続されたカップリングコンデンサ210を備えている。カップリングコンデンサ210は、反復信号PLSに応動して充電動作と放電動作を反復して行う。カップリングコンデンサ210の端子Aの印加電圧と雰囲気温度から判定しきい値を求め、検出した充電時間および放電時間を当該判定しきい値と比較することで漏電状態を判定する。【選択図】図2
ELECTRIC LEAK DETECTOR FOR A VEHICLE
車両用漏電検出装置
2016-04-28
Patent
Electronic Resource
Japanese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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