Zero-voltage-switching dual-boost converter with multi-functional inductors and improved symmetrical rectifier for distributed generation systems

Phase-Shift-Controlled Isolated Buck-Boost Converter With Active-Clamped Three-Level Rectifier (AC-TLR) Featuring Soft-Switching Within Wide Operation Range

“…Substituting (12) and (23) into the equations in Table I, the ZVS condition for the Boost-CCM mode can be obtained as, ( 1 ) Fig. 15.…”

“…Meanwhile, ZVS have been achieved for all the primary-side 3 4 ZVS region of and S S isolated-boost topology presented in [23] is selected as the reference for some quantitative comparisons. In the topology in [23], a full-bridge circuit and four rectifying diodes are used, and the voltage stress of rectifying diodes is half of the output voltage as well. The input and output voltages of experimental prototype in [23] are the same as the proposed converter.…”

“…In the topology in [23], a full-bridge circuit and four rectifying diodes are used, and the voltage stress of rectifying diodes is half of the output voltage as well. The input and output voltages of experimental prototype in [23] are the same as the proposed converter. The experimental results in [23] indicate that the conversion efficiency of the isolated boost converter decreases as the input voltage decreases.…”

“…The input and output voltages of experimental prototype in [23] are the same as the proposed converter. The experimental results in [23] indicate that the conversion efficiency of the isolated boost converter decreases as the input voltage decreases. As a result, trade-offs among the efficiencies under maximum, normal and minimum input voltages are very difficult to make.…”

“…Low voltage stress on the rectifying devices can be achieved by employing a capacitive output filter, because the voltage of the rectifying devices can be clamped directly by the filter capacitor. There are many kinds of rectification circuits with capacitive filters, such as the center-tapped rectifier, the full-bridge rectifier and the voltage doubler rectifier [22] [23]. The voltage doubler rectifier is suitable for high voltage applications, because its output voltage is twice that of the transformer secondary winding, and hence, the turns ratio of the transformer can be reduced.…”