| 摘要 |
<p>PURPOSE:To prevent the load side from being affected even if a high voltage is generated in the output of a rectifier through the start of traction, when a battery relay inserted into between a battery and a load is put into an OFF- state by a certain reason. CONSTITUTION:An electric power source circuit is equipped with the first diode (D1) which supplies electricity from a battery 1 and the second diode (D2) for supplying electric current from the rectified output, in a dc circuit formed from a battery switch 2 which is opened and closed by the operation and the coil of a battery relay 3 inserted between the battery 1 and a load. An electric current is supplied into the coil of the battery relay through the first diods (D1) by putting the battery switch 2 into a turned-ON state, when the battery voltage is normal, and the countercurrent applied to a load is prevented by the second diode (D2). Further, when a voltage is generated in the output of a rectifier 9, in the state where the battery relay 3 is not operated, the battery relay 3 is closed through the second diode (D2), and the generation of the abnormally high voltage is prevented.</p> |
