Electricity: power supply or regulation systems – Remote sensing
Patent
1975-04-14
1976-04-27
Goldberg, Gerald
Electricity: power supply or regulation systems
Remote sensing
307127, 321 11, 321 45R, G05F 144
Patent
active
039537889
ABSTRACT:
An AC power source characterized by the absence of a step-up output transformer is disclosed. The power source, which includes first and second output terminals across which a load is connected, is designed to provide AC power at a desired output voltage, e.g., 130v rms up to a desired current rating, e.g., 8 amperes. The source includes a first unit which includes a first voltage amplifier associated with positive and negative current amplifiers of substantially unity voltage gain, which provide power at the first output terminal up to the rated current at a voltage of 65v rms. Direct feedback is provided to the first voltage amplifier from the first output terminal, to which the load is connected. The source includes a second unit identical to the first unit, which includes a second voltage amplifier associated with positive and negative current amplifiers of substantially unity voltage gain, which provide power at the second output terminal up to the rated current at a voltage of 65v rms. The voltages at the two output terminals are 180.degree. out of phase so that the voltage across the two terminals is 130v rms. Direct feedback is provided to the second voltage amplifier from the second output terminal. The current amplifiers include transistors which are connected in parallel and commonly driven and protective means to protect the transistors due to a short-type failure of one of them. The power source may include several current-amplifier modules connected in parallel between the two voltage amplifiers and the two output terminals. Any defective module is replaceable without the interruption of power supply to the load as long as one of the modules functions properly.
REFERENCES:
patent: 3483425 (1969-12-01), Yanishevsky
patent: 3490028 (1970-01-01), Modiano
patent: 3566292 (1971-02-01), Nercessian et al.
patent: 3801858 (1974-04-01), Grangaard et al.
patent: 3818361 (1974-06-01), Gonda
Pauly Raymond W.
Taddeo Fausto V.
Goldberg Gerald
Pacific Electronic Enterprises Inc.
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