| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a double system power source, which can always diagnose whether a power switching circuit is normal, specify a fault part when a fault occurs, and warn a user. <P>SOLUTION: Power of a main battery 1 is supplied to an inverter and a motor load 17 through a main power source supply line 4 from a breaker 3. Also, power of a sub battery 6 is supplied to the load 17 through switches 7-10 and a sub power source supply line 11. The operation of the breaker 3 and the switches 7-10 is controlled by a microcomputer 16, in a normal operation state, the breaker 3 is on and the switches 7-10 are cut off, and power supply to the inverter and the motor load 17 from the sub power source supply line 11 is blocked. The microcomputer 16 is connected to gates of the switches 7-10 through control lines 18-20, 26, switches 7, 8 are monitored by a transistor 15, and switches 9, 10 are monitored by a transistor 14. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
