| 摘要 |
PURPOSE: An insulation resistance measurement circuit is provided to check dielectric breakdown of a high voltage battery of a hybrid vehicle in real-time. CONSTITUTION: An insulation resistance measurement circuit includes a first operational amplifier (120), a second operational amplifier (130), a first switch (140) and a second switch (150). The first operational amplifier is connected to a plus terminal or the second operational amplifier. The second operational amplifier is connected to a minus terminal of the battery or the first operational amplifier. The first switch is connected between the plus terminal and a non-inverting terminal of the first operational amplifier. The second switch is connected between the minus terminal and an inverting terminal of the second operational amplifier. |
