Voltage-regulated and overcurrent-protected power supply

Details Voltage-regulated and overcurrent-protected power supply Voltage-regulated and overcurrent-protected power supply

1975-10-09

1977-01-25

Pellinen, A. D.

Electricity: power supply or regulation systems

Remote sensing

321 2, 321 19, 323 9, H02M 3335

Patent

active

040053512

ABSTRACT:
To provide output power, for example for automotive test equipment from input sources having widely varying input voltages, for example between 4.5 and 32 V, without range switches, or setting potentiometers, a blocking oscillator circuit including a transformer and a switching transistor in series with the primary are connected across the input terminals, one secondary of the transformer charging a capacitor, another secondary of the transformer charging an auxiliary capacitor, the output voltage of which is connected to a control transistor to interrupt operation of the blocking oscillator formed by the transformer primary and the transistor when the voltage applied to the control transistor control electrode exceeds a reference value established, for example, by a Zener diode; a sensing resistor is connected in series with the main switching transistor, across which an output voltage is taken which is in turn applied to the control electrode of the control transistor to interrupt blocking oscillator operation of the main transistor when the current through the sensing resistor exceeds a predetermined value.

REFERENCES:
patent: 2920265 (1960-01-01), Siedband
patent: 2941159 (1960-06-01), Edelman
patent: 3300705 (1967-01-01), Hunstad
patent: 3435320 (1969-03-01), Lee et al.
patent: 3441833 (1969-04-01), Bahrs et al.
patent: 3639826 (1972-02-01), Grundberg
patent: 3668505 (1972-06-01), Dalton et al.
patent: 3684924 (1972-08-01), Miller
patent: 3889173 (1975-06-01), Klusmann et al.

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