Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1974-05-20
1976-04-13
Shoop, William M.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307202R, H02M 118
Patent
active
039506916
ABSTRACT:
A DC-to-AC inverter is disclosed utilizing a clock oscillator and an amplifying circuit for delivering AC power at a relatively high output level. A protection circuit is provided to sense potentially damaging transient signals, isolate them from the amplifier circuitry, and return most of the power of the transient signals to the DC supply to both conserve power and protect the solid state circuitry. The output transistors are biased such that, as the collector current approaches a predetermined maximum current level, the base-emitter bias voltage of the transistor approaches the maximum amplitude of the applied base drive signal, to limit the collector current which in turn limits the AC output current of the inverter under short circuit conditions. An amplitude sensing circuit measures the output level of the inverter and disables the inverter whenever the AC output or the DC supply voltage goes below a predetermined level. A standby power circuit maintains normal operation of the oscillator and control logic during temporary interruptions or reductions in the DC supply.
REFERENCES:
patent: 3246206 (1966-04-01), Chowdhuri
patent: 3351839 (1967-11-01), Johnston et al.
patent: 3376493 (1968-04-01), Carlson
patent: 3377540 (1968-04-01), Meyer
patent: 3480871 (1969-11-01), Rogers et al.
patent: 3495156 (1975-02-01), Hamilton et al.
patent: 3609386 (1971-09-01), Patlach
patent: 3710218 (1973-01-01), Roundy et al.
patent: 3794907 (1974-02-01), Fucito
patent: 3800198 (1974-03-01), Graf et al.
IBM Technical Disclosure Bulletin, Vol. 9, No. 9, pp. 1217, 1218; Feb., 1967.
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