Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
Patent
1987-02-02
1988-05-17
Salce, Patrick R.
Electric power conversion systems
Current conversion
Including an a.c.-d.c.-a.c. converter
363 98, H02M 545
Patent
active
047455390
ABSTRACT:
A frequency, voltage and waveshape converter is placed between the power line and the power input terminals of a load means (such as a fluorescent lighting system wherein the fluorescent lamps are operated by way of ordinary magnetic ballasts designed to be powered on regular 60 Hz power line voltage). The converter is controllably operable to provide to the power input terminals of the load means an AC voltage of frequency, magnitude and/or waveshape different from those of the power line voltage, thereby to permit effective control of the current supplied to the load means. In case of the load means being a fluorescent lighting system, the frequency of the AC voltage is adjustable over the range of 50-500 Hz, thereby providing for a very wide range of light output control.
REFERENCES:
patent: 4504899 (1985-03-01), Jessee
patent: 4520437 (1985-05-01), Boettcher, Jr. et al.
patent: 4525774 (1985-06-01), Kino et al.
patent: 4533986 (1985-08-01), Jones
patent: 4555750 (1985-11-01), Matsumara et al.
patent: 4635177 (1987-01-01), Shekhawat et al.
Hoff Marc S.
Salce Patrick R.
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