| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide appropriate voltage regulation even if a battery becomes dislodged. SOLUTION: In order to make constant the voltage of a battery terminal BT connected with a flasher relay 3 and a battery 4, a transistor Q1 is included which, if a high voltage is produced at a charging terminal CT with ACG (Alternating-Current Generator) 1 connected and at the battery terminal, selectively turns on/off a thyristor at a specified time constant. Further, in order to prevent the thyristor from being turned on despite the transistor Q1's being in the on state if the flasher relay 3 is driven and a negative voltage is produced at the battery terminal BT, a diode D4 is included which bypasses the gate current of the thyristor to the battery terminal BT through the transistor Q1. Even if a negative voltage is produced at the battery terminal BT owing to the dislodgment of the battery or the like, this prevents the voltage difference between gate and cathode from being brought to the thyristor's on level, and allows ordinary regulator control.</p> |
