To detect ground fault of a motor wire more accurately than a conventional one.SOLUTION: A ground fault detection device detects ground fault of a motor wire which connects a travel motor, which generates travel power of a vehicle, and an inverter which drives the travel motor. According to the device, any one of plural switching elements, which constitute the inverter, is set to a conduction state in a stop state of the vehicle, and in this state, ground fault of the motor wire is detected based on a voltage of a smoothing capacitor which is provided at input of the inverter.SELECTED DRAWING: Figure 1
【課題】従来よりも正確にモータ線の地絡を検知する。【解決手段】車両の走行動力を発生する走行モータと当該走行モータを駆動するインバータとを接続するモータ線の地絡を検出する地絡検知装置であって、車両の停止状態においてインバータを構成する複数のスイッチング素子のいずれか1つを導通状態に設定し、この状態においてインバータの入力に設けられた平滑コンデンサの電圧に基づいてモータ線の地絡を検知する。【選択図】図1
GROUND FAULT DETECTION DEVICE
地絡検知装置
2019-07-25
Patent
Electronic Resource
Japanese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |