| 摘要 |
The present invention relates to an improving circuit of uninterruptible power system which especially improve the flyback circuit and charging circuit. In the active flyback circuit of the present invention, the flyback coil is changed from the traditional drive terminal to the feed-back terminal in order to eliminate the remaining electromotive force in the transformer and reduce the heat energy loss in flyback cycle because the flyback voltage only require one battery voltage (1BT+) for driving, so it is called active flyback circuit; moreover, the present invention use the internal current limit circuit of switching power regulator as the protection of basic charging; then, the CPU will output fix frequency to the battery charge to have switching transistor to switch ON and OFF during charge of battery and provide intermittent charge to battery in order to prevent the floating effectiveness of battery voltage and to have efficient charging to battery to reduce the charging time that is intelligent fast charging circuit.
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