FAULT DETECTION IN AN ELECTRIC DRIVE TRAIN OF A VEHICLE

原文（中文）

A power inverter for an electric drive chain of a vehicle, comprising: a first electrical path connectable to a high voltage source and a low voltage source; a second electrical path that is connectable to the first electrical path and also capable of being electrically isolated from the first electrical path; and a test unit configured to determine an indication of a potential difference between the first and second electrical paths; the power inverter being configured to have two modes of operation: an operational mode in which the first electrical path is connected to the high voltage source and the power inverter is configured to provide current to an electric motor of the vehicle; and a test mode in which the first electrical path is connected to the low voltage source and the test unit is configured to determine, from the indication of the potential difference between the first and second electrical paths, whether there is a fault in an electrical connection in the vehicle.