A power inverter 204 for an electric vehicle, comprises: a first electrical path 203 connectable to a high voltage source 202 and a low voltage source 222 - 230; a second electrical path 201 connectable to the first electrical path and also capable of being electrically isolated from the first electrical path; and at least one test unit 240, 250 to determine a potential difference between the first and second paths. The power inverter has two modes of operation: an operational mode in which the first path is connected to the high voltage source and current is provided to the electric motor 206; and a test mode in which the first path is connected to the low voltage source and the test unit determines, from the potential difference between the electrical paths, whether there is a fault in an electrical connection in the vehicle. The fault may be a winding fault in the motor or an isolation fault between the HV and LV systems of the vehicle.
Fault detection in an electric drive train of a vehicle
2024-04-10
Patent
Elektronische Ressource
Englisch
FAULT DETECTION IN AN ELECTRIC DRIVE TRAIN OF A VEHICLE
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