An uninterrupted power supply (UPS) system is provided with a power factor correction circuit. The UPS system includes a rectifier having input terminals for connection to an AC utility power source and output terminals. The power factor correction circuit is operatively connected to the input and output...http://www.google.fr/patents/US4980812?utm_source=gb-gplus-shareBrevet US4980812 - Uninterrupted power supply system having improved power factor correction circuit
Uninterrupted power supply system having improved power factor correction ...
