PROBLEM TO BE SOLVED: To improve the determination accuracy of the electric leakage of an electric leakage determination device.SOLUTION: An electric leakage determination device including: a DC power supply 11; and electric loads 10 and 30 for charging/discharging the DC power supply 11 is applied to a vehicle power supply system in which a DC power supply circuit 100 including the DC power supply 11 and the electric loads 10 and 30 is insulated from the vehicle body. The electric leakage determination device is configured to acquire the wave-height value of an AC signal voltage-divided by the resistance components of a resistor 26 and the insulation resistance components of the DC power supply circuit 100 in a state that the AC signal is output via the resistor 26 and a capacitor 22 to the DC power supply circuit 100, and to determine the presence/absence of electric leakage on the basis of the comparison of the acquired wave-height value with a predetermined determination value, and to determine at least either the maximum voltage which may be generated in the DC power supply circuit 100 or a common capacity, and to set a threshold in the case of determining the presence/absence of the electric leakage on the basis of the maximum voltage.SELECTED DRAWING: Figure 1
【課題】漏電判定装置の漏電の判定精度を向上することを主たる目的とする。【解決手段】直流電源11と、直流電源11に対して充放電を行う電気負荷10,30とを備え、直流電源11および電気負荷10,30を含む直流電源回路100が車体に対して絶縁されている車両電源システムに適用される漏電判定装置は、直流電源回路100に対して抵抗器26およびコンデンサ22を介して交流信号を出力した状態で、抵抗器26の抵抗成分と直流電源回路100の絶縁抵抗成分とで分圧された交流信号の波高値を取得し、取得した波高値と所定の判定値との比較に基づいて漏電の有無を判定する。この際、直流電源回路100で生じうる最大電圧およびコモン容量の少なくとも一方を判定し、当該最大電圧に基づいて、漏電の有無を判定する際の閾値を設定する。【選択図】 図1
ELECTRIC LEAKAGE DETERMINATION DEVICE
漏電判定装置
2016-07-14
Patent
Electronic Resource
Japanese
IPC: | 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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |