UNINTERRUPTIBLE POWER SUPPLY CIRCUIT

• Main Author: CUI, ZHAOXUE
• Format: Patent
• Language: English; French; German
• Published: 11.03.2015
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The present invention discloses an uninterruptible power supply circuit, which includes: a bidirectional selector switch, a first-type bidirectional converter, a second-type bidirectional converter, an energy storage apparatus, and a filtering apparatus, and is alternatively connected to an alternating-current power supply and the energy storage apparatus by using the bidirectional selector switch; the first-type bidirectional converter is disposed between the bidirectional selector switch and the filtering apparatus, the second-type bidirectional converter is disposed between the filtering apparatus and a load, and both the first-type bidirectional converter and the second-type bidirectional converter have a function of rectifying or inverting. By using a bidirectional converter and a bidirectional selector switch, alternating-current commercial power, the energy storage apparatus, and a charger required by the energy storage apparatus can share the bidirectional converter; compared with an existing uninterruptible power supply circuit, no extra charger or high-power conversion circuit is required, thereby simplifying a circuit structure of the uninterruptible power supply circuit.