Ground fault detecting system and electric vehicle with ground fault detecting system

摘要

When a malfunction of an ungrounded drive electric system (100) including first and second ungrounded power supplies (14, 12), an inverter (22), and a motor (16) which is energized by the first and second ungrounded power supplies (14, 12) through the inverter (22), i.e., an erroneous opening of switches (42) of a battery (12), is detected, switches (SW1 through SW5) of an insulation resistance detector (51) are opened to insolate the insulation resistance detector (51) from the ungrounded drive electric system (100).