Input filter for a power electronic system
First Claim
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1. A filter circuit arrangement for a power electronic system, comprising:
- a feedback circuit connected between an output of a power converter and an input to one or more switches of the power converter, the feedback circuit comprisinga series-pass device selectively controlled to effect control of one or more operation parameters of the one or more switches to thereby control an input characteristic of a power converter;
a voltage sensor arranged to sense a voltage across the series-pass device for controlling the one or more operation parameters of the one or more switches; and
a voltage comparator arranged to compare the sensed voltage across the series-pass device with a second reference voltage, and to output a voltage for controlling the one or more operation parameters of the one or more switches;
wherein the series-pass device is connected in series between an input of the power converter and a power source; and
wherein the series-pass device is controlled such that noise signal generated by the one or more switches is filtered and is prevented from reaching the power source.
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Abstract
An input filter for a power electronic system includes a series-pass device arranged to control an input characteristic of a power converter, and a control mechanism arranged to control an operation of the series-pass device during a power conversion process, so as to filter a noise signal generated by the power converter from reaching a power source of the power electronic system.
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Citations
23 Claims
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1. A filter circuit arrangement for a power electronic system, comprising:
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a feedback circuit connected between an output of a power converter and an input to one or more switches of the power converter, the feedback circuit comprising a series-pass device selectively controlled to effect control of one or more operation parameters of the one or more switches to thereby control an input characteristic of a power converter; a voltage sensor arranged to sense a voltage across the series-pass device for controlling the one or more operation parameters of the one or more switches; and a voltage comparator arranged to compare the sensed voltage across the series-pass device with a second reference voltage, and to output a voltage for controlling the one or more operation parameters of the one or more switches; wherein the series-pass device is connected in series between an input of the power converter and a power source; and wherein the series-pass device is controlled such that noise signal generated by the one or more switches is filtered and is prevented from reaching the power source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A power electronic system, comprising:
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a power converter comprising an input and an output, and being formed at least in part by one or more switches, wherein the power converter is arranged between a power source and a load; a feedback circuit connected between the output of the power converter and an input to the one or more switches, the feedback circuit comprising a series-pass device selectively controlled to effect control of one or more operation parameters of the one or more switches to thereby control an input characteristic of a power converter; a voltage sensor arranged to sense a voltage across the series-pass device for controlling the one or more operation parameters of the one or more switches; and a voltage comparator arranged to compare the sensed voltage across the series-pass device with a second reference voltage, and to output a voltage for controlling the one or more operation parameters of the one or more switches; wherein the series-pass device is connected in series between the input of the power converter and the power source; and wherein the series-pass device is controlled such that noise signal generated by the one or more switches is filtered and is prevented from reaching the power source. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for operating a filter circuit arrangement in a power electronic system, comprising the steps of:
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providing a feedback circuit between an output of a power converter and an input to one or more switches of the power converter, the feedback circuit comprising a series-pass device connected in series between an input of the power converter and a power source; selectively controlling the series-pass device to effect control of one or more operation parameters of the one or more switches, thereby controlling an input characteristic of a power converter such that noise signal generated by the one or more switches is filtered and is prevented from reaching the power source, the selective control step comprising; sensing a voltage across the series-pass device; comparing the sensed voltage across the series-pass device with a reference voltage; and outputting a voltage after the comparison for controlling the one or more operation parameters of the one or more switches.
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Specification