| 摘要 |
<p>When failure of a booster circuit (53) is detected while monitoring the boost voltage outputted by the booster circuit (53), supply of power source voltage to the booster circuit (53) is stopped so that motor relays (55, 56) are turned off when the boost voltage outputted from the booster circuit (53) is below a predetermined threshold value. Thus, it is possible to prevent generation of arc when the contacts of the motor relays (55, 56) are disconnected and adhesion of the motor relays (55, 56).</p> |
