Off-line series type regulating power supply

Details Off-line series type regulating power supply Off-line series type regulating power supply

1986-04-03

1987-12-01

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Phase controlled switching using electronic tube or a three...

323267, 323274, G05F 144

Patent

active

047106972

ABSTRACT:
An off-line regulating power supply utilizes a regulating transistor which perates in a dissipative mode for only a portion of each half cycle of an input AC voltage in order to regulate an output voltage by truncating the input AC sinewave. This AC input signal is full wave rectified and coupled to a primary winding of a power transformer through the regulating transistor. One of a plurality of secondary windings is coupled to a voltage threshold detector which responds instantaneously to attainment of the threshold in each half cycle of operation to bias the regulating transistor from a saturated condition to an active dissipative impedance state which limits the output voltage to the threshold level. As the input AC sinewave peaks and declines in value, the regulating transistor is again biased into saturation when the voltage applied to the threshold detector drops below the threshold level.

REFERENCES:
patent: 3201597 (1965-08-01), Balan
patent: 3244965 (1966-04-01), Gutzwiller
patent: 3287623 (1966-11-01), Valancius
patent: 4061961 (1977-12-01), Baker
patent: 4302717 (1981-11-01), Olla
patent: 4368419 (1983-01-01), Welty
patent: 4437148 (1984-03-01), Suranyi

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