| 摘要 |
A power supply current monitoring apparatus is used for a load drive apparatus with two systems to drive a load. Each system includes a drive circuit connected in parallel with a battery and a relay connected between the drive circuit and a point at which power of the battery is divided between the systems. When overcurrent is detected once in one system, a repetitive monitoring process is performed. The monitoring process determines whether the overcurrent occurs by repeating a monitoring cycle. The monitoring cycle turns OFF the relay of one system and then monitors currents by turning ON the relay of one system when a predetermined cycle time elapses since the overcurrent detection. The monitoring process includes a mask procedure to stop monitoring the current in the other system. The mask procedure is performed after the relay of one system is turned OFF in each monitoring cycle. |
