| 摘要 |
Disclosed in the present invention is an uninterruptible power supply circuit comprising: a bidirectional selection switch, a first kind of bidirectional converter, a second kind of bidirectional converter, an energy storage device and a filtering device; the bidirectional selection switch is connected with either an alternating current power supply or the energy storage device, the first kind of bidirectional converter is arranged between the bidirectional selection switch and the filtering device, the second kind of bidirectional converter is arranged between the filtering device and a load, and both the first kind of bidirectional converter and the second kind of bidirectional converter have a rectifying or inverting function. Due to the adoption of the bidirectional converters and the bidirectional selection switch, an alternating current mains supply, the energy storage device and a charger needed for the energy storage device can share the bidirectional converters. Compared with the existing uninterruptible power supply circuits, the uninterruptible power supply circuit disclosed in the present invention does not need an extra charger or high-power conversion circuit, thereby simplifying the circuit structure of the uninterruptible power supply circuit. |
