Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1982-03-15
1984-12-25
Wong, Peter S.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 86, 363128, 323269, H02M 114
Patent
active
044907796
ABSTRACT:
Disclosed is an electrical power system adapted to receiving power from a source of alternating current, typically a small alternator, and supplying a direct current potential to a load. This power system includes two stages, the first stage comprising switchable rectifying devices such as silicon controlled rectifiers which interact with the impedance of the alternator or other source of alternating current power as a switching regulator to create an intermediate direct current potential.
The second stage operates from this intermediate direct current potential to produce a slightly lower output voltage, and creates a more accurate regulation than is possible with the first stage alone, the second stage greatly reduces ripple and high frequency noise components contained on the output of the first regulator stage. The second stage serves as an active low pass filter tuned to a desired DC voltage. In combination these two stages produce light weight, highly efficient power systems while providing an output that is essentially pure DC so that load devices such as aircraft radios or electronic computers may be connected directly to the output with or without a battery in parallel with the output.
REFERENCES:
patent: 2995697 (1961-08-01), Grenier
patent: 3264518 (1966-08-01), Stauverman
patent: 3348122 (1967-10-01), Todd
patent: 3395317 (1968-07-01), Hanson
patent: 3546494 (1970-12-01), Wanlass
patent: 3600663 (1971-08-01), Wagner
patent: 3670230 (1972-06-01), Rooney et al.
patent: 4257091 (1981-03-01), Kaufman
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