Patent ID: 7283338
Filing Date: 2007-10-16
Classification: H02H

Abstract:
1. A power supply device for low-voltage electronic residual current circuit breakers, the device comprising: an electronic rectifier stage, which receives an input from a mains voltage and generates a first unipolar voltage and a first current; and an electronic adjustment stage, which receives an input from said electronic rectifier stage and which generates, as an output thereof, a second unipolar voltage having an adjustable value, wherein said electronic adjustment stage comprises: a current adjustment circuit which receives the first current and generates a second current as an output thereof; and a charge accumulation circuit which receives the second current as an input thereof; wherein the current adjustment circuit generates the second current to maintain said second unipolar voltage at a predefined adjustable value, said current adjustment circuit receiving, as an input, voltage control signals that actively adjust said first current according to a switching-type adjustment mode; wherein said second current comprises a pulsed type current having an adjustable pulse, repetition period, and slopes of rising and falling edges, wherein the pulses of said second current are spaced by adjustable time intervals, the duration of said time intervals being a function of a desired maximum ripple of said second unipolar voltage.