| 摘要 |
PURPOSE:To make an exhaustive discharger miniaturized and inexpensive, by connecting a battery to a discharge resistance with the 1st switch for discharge before the exhaustive discharger is connected to the battery, and by connecting the exhaustive discharger with the 2nd switch after the voltage sagged. CONSTITUTION:An A/D converter 2 and an exhaustive discharger 3 are provided in parallel between a battery 1 and a three-phase AC generator 4 with changeover switches 5 and 6 so as to be able to change them over. Usually in the low load at night, the output of the three-phase AC generator 4 is A/D-converted 2 and the battery 1 is charged through contacts 5a and 6a of switches 5 and 6, while at peak hours in the daytime, the battery 1 is discharged and D/A- converted 3 to supplement AC power. After charging and discharging are performed in several cycles, the contacts of switches 5 and 6 are changed over to 5b and 6b for exhaustive discharge. A switch 8 connected in parallel to the exhaustive discharger 3 is closed and the battery 1 is discharged with a discharge resistance 9 to drop the battery voltage. Then a switch 7 is closed. In this way, the exhaustive discharger 3 is made miniaturized and inexpensive with the pressure-tightness low. |
