M. Rahman, Md Saif Kabir, Md Nazaf Rabbi, Mohammad Hashib Sarker, Ishmam Ahmed Chowdhury, Golam Sarowar
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Design and Analysis of Cascaded Buck-Boost Zeta (BBZ) Converter for Improved Efficiency at High Output Voltage
DC-DC and AC-DC converters are often used to obtain the craved voltage level. However, the conventional converters are not suitable for high output voltages without depreciating various parameters like conversion efficiency. In this paper, a new Cascaded Buck-Boost Zeta (BBZ) converter topology is proposed. Also, a closed-loop is implemented to improve THD and power factor. This converter’s DC-DC topology can deliver the output voltage as high as 773V along with high conversion efficiency at an 80% duty cycle. The AC-DC topology gives a maximum efficiency of 98.29%. The efficiency levels of both the topology are also relatively high at different duty cycles.
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