| 摘要 |
<p>Disclosed are an uninterrupted power supply circuit and a control method therefor, which belong to the field of communications. The circuit comprises: an AC input module, a positive Boost module, a negative Boost module, a battery, a first switch tube, a second switch tube, and a first thyristor. The collector of the first switch tube is electrically connected to the cathode of a first diode in the positive Boost module and one end of a first output filter capacitor in the positive Boost module; the emitter of the first switch tube is electrically connected to one end of a second inductor in the negative Boost module and a negative electrode of the battery; the anode of the first thyristor is electrically connected to the other end of the second inductor in the negative Boost module, the cathode of a second diode in the negative Boost module and the emitter of a fourth switch tube in the negative Boost module; and the cathode of the first thyristor is electrically connected to the positive electrode of the battery. The present invention can simplify the circuit structure of a UPS and improve the overall efficiency of a circuit.</p> |
