Science Daily April 19, 2024
An internal team of researchers (Japan, Taiwan) proposed a floating four-phase interleaved chargepump bidirectional dc-dc converter (F4P-ICPBDC) with wide Buck/Boost voltage ratio. The interleaved structure was used to mitigate the current ripple across the low-voltage side capacitor and inductors, while the floating configuration facilitated the high Buck/Boost voltage conversion ratio. To ensure a balanced average inductor current throughout the entire range of duty cycle, an asymmetric duty limit control strategy was implemented. Bidirectional synchronous rectification operations were seamlessly carried out without the need for additional hardware, which enhanced the overall converter efficiency. They developed a prototype to validate the wide Buck/Boost voltage ratio of the proposed converter between the constant low-voltage side (72 V) and the adjustable high-voltage side (400-800 V). The maximum efficiencies of the converter were recorded as 98.3% in the Buck mode and 97.6% in the Boost mode, respectively. Experimental results validated the feasibility and the efficacy of the proposed converter… read more. TECHNICAL ARTICLEÂ
Credit: Credit: Mishima Tomokazu