A dump truck is provided with a ground fault detection device that detects a ground fault detection voltage V0 as a difference between a detection voltage Vp between a positive electrode line of a DC bus and a neutral point N and a detection voltage Vn between the neutral point N and a negative electrode line of the DC bus and detects a ground fault based upon the ground fault detection voltage V0. The ground fault detection device includes a DC component determining section that extracts a DC component VLdc from the ground fault detection voltage V0 and determines a ground fault based upon the DC component VLdc, and a drive frequency component determining sections (that extract drive frequency components VLiR, VLiL of the inverters from the ground fault detection voltage V0 and determine a ground fault based upon the drive frequency components VLiR, VLiL.
Electrically operated working vehicle
2021-04-06
Patent
Elektronische Ressource
Englisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60P Fahrzeuge zum Transport von Lasten oder zum Befördern, Tragen oder Aufnehmen besonderer Lasten oder Gegenstände , VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES |
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