METHOD FOR REGULATING OUTPUT VOLTAGE OF AC-TO-DC CONVERTER Russian patent published in 2005 - IPC

FIELD: converter engineering; power supply to process loads demanding deep output voltage regulation and active power factor correction.

SUBSTANCE: proposed method for regulating output voltage of ac-to-dc converter that has uncontrolled bridge rectifier, LC ripple filter with dual-operation switch, input current sensor, and input voltage sensor includes comparison of input current sensor signal with reference signal generated by input voltage sensor and turn-on of dual-operation switch in case reference signal exceeds input current sensor signal or its turn-off in case input current sensor signal is higher than reference signal. To this end transfer ratio of input voltage sensor is modulated, its high value K_H being maintained in ON-position of dual-operation switch and low value K_L, in its OFF-position; at the same time depth of modulation of input voltage sensor transfer ratio ΔK = (K_H - K_L) is maintained constant.

EFFECT: enlarged output voltage regulation range at desired power factor value.

1 cl, 3 dwg