Uninterrupted power supply having no low frequency power magneti

Electric power conversion systems – Current conversion – Using semiconductor-type converter

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363 37, 363 41, 363 98, 307 46, 307 66, H02M 3335

Patent

active

049358618

ABSTRACT:
An uninterrupted power supply (UPS) systems is provided comprising a rectifier circuit, an inverter circuit and a battery boost circuit. One of the input terminals of the rectifier circuit is for connection to the ungrounded conductor of an AC power source and the other input terminal of the rectifier circuit is for connection to the grounded conductor of the AC power source. The UPS has a pair of load terminals for connection to a load. The input terminal of the rectifier circuit for connection to the grounded conductor is connected to one of the pair of load terminals by an electrical conductor whose electrical continuity is maintained from this input terminal to the one of the pair of load terminals without any isolation device such as a 50 or 60 Hz transformer being disposed between the input terminal and the one of the pair of load terminals.

REFERENCES:
patent: 4246633 (1981-01-01), Borkovitz
patent: 4626979 (1986-12-01), Jaquay
patent: 4638176 (1987-01-01), Martinelli
patent: 4706180 (1987-11-01), Wills

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