Voltage threshold circuit for power conditioner
First Claim
1. In a power conditioner characterized by the use of a power factor correction stage having an output voltage, a voltage threshold circuit comprising:
- a comparator with inputs and an output;
a predetermined threshold voltage connected to a first comparator input and providing a first value to the first comparator input;
a first signal corresponding to the output voltage of the power factor correction stage connected to a second comparator input and providing a second value to the second comparator input;
a second signal corresponding to the output of the comparator and determined by a comparison of values of first and second comparator inputs; and
a responsive means for altering one value in the group of first value and second value, in response to the second signal, changing the comparison of values of first and second comparator inputs.
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Abstract
A voltage threshold circuit for the power factor correction stage of a power conversion system is provide. The circuit features a voltage threshold circuit with a comparator for (i) comparing a predetermined threshold voltage to the output voltage of a power factor correction stage of a power conditioner and (ii) outputting a signal if the output voltage is at least equal to the predetermined threshold voltage. The presence of the signal decreases the predetermined threshold voltage, thereby effectively changing the output voltage above which the comparator continues to output the signal.
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Citations
12 Claims
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1. In a power conditioner characterized by the use of a power factor correction stage having an output voltage, a voltage threshold circuit comprising:
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a comparator with inputs and an output;
a predetermined threshold voltage connected to a first comparator input and providing a first value to the first comparator input;
a first signal corresponding to the output voltage of the power factor correction stage connected to a second comparator input and providing a second value to the second comparator input;
a second signal corresponding to the output of the comparator and determined by a comparison of values of first and second comparator inputs; and
a responsive means for altering one value in the group of first value and second value, in response to the second signal, changing the comparison of values of first and second comparator inputs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
an applied power signal;
a signal generating means receiving both the applied power signal and the second signal; and
a control signal transmitted by the signal generating means for enabling and disabling at least one downstream device.
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10. The voltage threshold circuit of claim 9 wherein the signal generating means comprises a transistor.
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11. In a power conditioner characterized by the use of a power factor correction stage having an output voltage, a voltage threshold circuit comprising:
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a comparison means for comparing a predetermined threshold voltage to a first signal corresponding to the output voltage of the power factor correction stage and outputting a second signal in response to the first signal being a value at least equal to the predetermined threshold voltage; and
a responsive means responsive to the second signal for decreasing the predetermined threshold voltage, effectively changing the threshold voltage above which the comparison means continues to output the second signal.
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12. In a power conditioner characterized by the use of a power factor correction stage having an output voltage, a voltage threshold circuit comprising:
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a first signal corresponding to the output voltage of the power factor correction stage;
a voltage divider circuit, with at least two inputs and at least one output, which receives said first signal;
a comparator with inputs and an output;
a predetermined threshold voltage connected to a first comparator input and providing a first value to the first comparator input;
a third signal transmitted from the voltage divider circuit connected to a second comparator input and providing a second value to the second comparator input;
a second signal corresponding to the output of the comparator and determined by a comparison of values of the first and second comparator inputs;
a buffer circuit receiving the second signal;
a fourth signal transmitted by the buffer circuit corresponding to the second signal with signal alterations made by the buffer, and received by the voltage divider circuit, the voltage divider circuit is thereby modifying the first signal to create the third signal received by the comparator.
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Specification