Full
Outline
A dual-active-bridge DC-DC converter is taken as the research object, and a triple-phase-shift (TPS) control strategy with an optimization objective of reducing the backflow power and inductance peak current is proposed. Through the analysis of characteristics in six operating modes with TPS, the input-side zero-backflow power mode and bilateral zero-backflow power mode with smaller inductance peak current in Boost and Buck modes are obtained, and the constraint of phase-shift ratio and power range in different operating modes are given. The inductance peak current in bilateral zero-backflow power mode is smaller, and the zero switching of the power device can be realized. On this basis, the working point with the smallest inductance peak current at different values of transmission power is further obtained through optimizations using the KKT method. Finally, the proposed TPS optimization method and the inductance peak current optimization method under extended-phase-shift were verified by experiments. Experimental results show that the proposed optimization strategy can eliminate the backflow power, reduce the current stress and improve the conversion efficiency, thus verifying the theoretical analysis.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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