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In this paper, a single-phase grid-connected transformerless photovoltaic inverter for residential application is presented. The inverter is derived from a boost cascaded with a buck converter along with a line frequency unfolding circuit. Due to its novel operating modes, high efficiency can be achieved because there is only one switch operating at high frequency at a time, and the converter allows...
In this paper, the concept of high frequency operation to shrink the EMI filter and inductor size in the PFC circuit is demonstrated. A 600 kHz single switch CCM boost PFC with 92% full load efficiency at 90 VAC input is developed with the Infineon newly developed CoolMOS and SiC diode devices. Both the EMI filter and the inductor size are greatly reduced. Further more, a new two-stage PFC architecture...
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