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The design of DC/AC power systems based on classical buck or buck-boost power cell structures implies large signal variation of the operating point duty cycle especially in the case of sine wave output.
This paper presents a line interfaced inverter that employs a dc-dc converter to actively shape its ac current waveform. The duty cycle applied to this converter to control the current is determined in a closed loop fashion. The incremental dynamic response of the power circuit is found to be highly dependent on the ac voltage and current waveforms and therefore varies on a 60 Hz basis. With fixed...
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