Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1993-08-16
1994-06-07
Voeltz, Emanuel T.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 98, 323207, H02M 5458, H02M 112
Patent
active
053195345
ABSTRACT:
The present invention provides an improved active power line conditioner which achieves a significant improvement in peak voltage regulation capability when compared with a similarly-sized device of the prior art. Enhanced peak voltage regulation capability is achieved by reducing the number of turns on the transformer winding connected to the series inverter. As a result, the AC regulation voltage induced across the transformer primary and added to or subtracted from the AC supply voltage will be capable of achieving higher peak levels of short duration. When a reduced-turns-ratio transformer is utilized according to the invention, variations of the AC supply voltage which are within the sinusoidal regulation range of a prior art active power line conditioner having a similarly-sized transformer, the output voltage will remain sinusoidal. When, however, the input voltage variation is outside of this sinusoidal regulation range, the reduced-turns-ratio transformer will create a peaking but nonsinusoidal AC output voltage. This allows rejection of higher magnitude input voltage disturbances of short duration.
REFERENCES:
patent: 3825814 (1974-07-01), Pelly
patent: 4241395 (1980-12-01), Stacey et al.
Lenart R. P.
Voeltz Emanuel T.
Westinghouse Electric Corp.
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