Power supply device for low-voltage electronic residual current circuit breakers
First Claim
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.
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Accused Products
Abstract
A power supply device for low-voltage electronic residual current circuit breakers includes an electronic rectifier stage suitable to receive in input a mains voltage and to generate a first unipolar voltage whose value depends on the value of the mains voltage, and an electronic adjustment stage, suitable to receive in input the first unipolar voltage and a current and to generate in output a second unipolar voltage of adjustable value. The electronic adjustment stage performs an active adjustment of the current input to the electronic adjustment stage so as to keep the second unipolar voltage at a predefined constant value.
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Citations
9 Claims
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1. A power supply device for low-voltage electronic residual current circuit breakers, the device comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A power supply device for low-voltage electronic residual current circuit breakers, the device comprising:
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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; and wherein the current adjustment circuit generates the second current to maintain said second unipolar voltage at a predefined adjustable value; and an electronic interruption circuit which enables or interrupts said first current following reception of a respective enable or disable signal; and a comparator circuit which generates a control signal when said unipolar voltage changes above or below a preset range; and an enabling circuit which generates an enable or disable signal for said electronic interruption circuit responsive to a control signal from said comparator circuit; 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 a just 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 the rising/falling edges; and 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.
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Specification