Constant voltage circuit

Details Constant voltage circuit Constant voltage circuit

1974-09-17

1976-02-17

Pellinen, A. D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307 33, 323 19, 323 22SC, 323 25, 323 39, G05F 164

Patent

active

039393941

ABSTRACT:
A power supply circuit using a silicon controlled rectifier to rectify alternating voltage and apply the rectified voltage across a capacitor. To obtain one polarity of rectified voltage, the cathode of the SCR is connected to the AC source and the output circuit of a switching transistor is connected in series with the gate of the SCR. The input circuit of the transistor is connected in series with a constant voltage element across the capacitor. The switching semiconductor only conducts when the capacitor discharges to a predetermined level. To obtain the opposite polarity rectified voltage the cathode of the SCR is connected to one terminal of the capacitor and, instead of the semiconductor switch, a constant voltage device is connected between the gate of the SCR and the other terminal of the capacitor so that the SCR conducts only when the voltage across the capacitor drops below the voltage of the constant voltage device.

REFERENCES:
patent: 3241043 (1966-03-01), Clarke
patent: 3321692 (1967-05-01), Walsh
patent: 3418554 (1968-12-01), Legatti
patent: 3636434 (1972-01-01), Beuk et al.
patent: 3781632 (1973-12-01), Charboneau

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