Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1997-11-25
1999-04-20
Nguyen, Matthew
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
307 66, H02M 3335, H02J 700
Patent
active
058962808
ABSTRACT:
An uninterruptible power supply (UPS) includes a transformer, a low voltage converter (02), a rectifier, and a high voltage inverter (01). The low voltage converter comprises a battery, a first switching device (Q3), a second switching device (Q4), and first drive circuits (41, 42). The high voltage inverter (01) includes first and second load terminals adapted to be coupled across a load in an emergency situation; an output capacitor (C); a third switching device (Q1) and a fourth switching device (Q2), and second drive circuitry (43, 44) for driving the third and fourth switching devices from conducting to non-conducting states and vice versa so as to produce a quasi-sinusoidal output voltage waveform across the load terminals.
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Gucyski Jeff
Johnson, Jr. Robert William
Jonsson Rune Lennart
Exide Electronics Corporation
Nguyen Matthew
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