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Simple and straightforward realisation of an electronic capacitor

Simple and straightforward realisation of an electronic capacitor

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This Letter proposes a simple realisation of a circuit (referred to as electronic capacitor) capable of emulating large capacitance of controllable value while utilising a much smaller capacitor and a DC–DC converter. The circuit may be used in a plug-and-play fashion instead of any real large capacitor within the control bandwidth. The proposed control algorithm forces the terminal voltage of the DC–DC converter to follow the well-known capacitance equation by sensing the terminal current and simultaneously compensates conversion losses by an auxiliary control loop. The proposed algorithm is successfully verified by emulating bulk DC-link capacitance of a commercial power factor correction front end.

http://iet.metastore.ingenta.com/content/journals/10.1049/el.2018.7564
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