| 摘要 |
A capacitor storage system is provided which is simple in structure and can control the charge level according to the use environment and detect a fault, if any. The capacitor storage system comprises: a plurality of capacitors connected in series and producing terminal voltages, respectively, the capacitors developing a total voltage, parallel monitors connected with the capacitors, respectively, for monitoring terminal voltages of the capacitors and for initializing the capacitors, a charging controller for controlling charging of the series-connected capacitors according to the total voltage of the series-connected capacitors, and a charging stop total voltage setter for setting a charging stop total voltage Vm, wherein each of the parallel monitors having a comparator for detecting a predetermined initialization voltage Vini and a bypass circuit for bypassing a charging current of the corresponding capacitor, the bypass circuit receiving an output from the comparator as its control input, the charging controller enables the parallel monitors to perform an operation of initialization, if the initialization voltage is detected from any one of the capacitors, and then stops charging of the series-connected capacitors when the total voltage of the series-connected capacitors reaches the charging stop total voltage Vm.
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