Power-supply arrangement

Details Power-supply arrangement Power-supply arrangement

1987-05-28

1988-08-16

Salce, Patrick R.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 97, 323285, H02M 3335

Patent

active

047648562

ABSTRACT:
A flyback converter comprises a series arrangement of a primary winding (n.sub.1), a transistor switch (S.sub.1) and a resistor (R.sub.1) connected between two input terminals (1, 2) for receiving an input voltage. The series arrangement of a secondary winding (n.sub.2) and a diode (D.sub.1) is arranged between a pair of output terminals (3, 4) for connection to a load (M). The transistor switch (S.sub.1) is controlled by pulses from a pulse-width modulator (10). A sawtooth voltage generated by an oscillator (20) is applied to a first input (11) of the pulse width modulator. A first feedback voltage is applied to a second input (12) of the modulator via a control amplifier (40). This feedback voltage is proportional to the difference between a reference voltage from a reference source (30) and a fraction of the output voltage. A second feedback voltage equal to the voltage across the resistor (R.sub.1) is applied to said second input via a capacitor (C.sub.1).

REFERENCES:
patent: 3350628 (1967-10-01), Gallagher et al.
patent: 4376263 (1983-03-01), Pittroff et al.
patent: 4672518 (1987-06-01), Murdock

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