Full
Outline
Critical conduction mode (CRM), in which the switching frequency of Boost converter changes widely due to the input voltage and load, leading to an increase in switching loss and a decrease in overall efficiency. To solve the above problems, an optimal control strategy for the full power range efficiency of Boost converter is proposed. Firstly, the internal loop control of inductive current is introduced on the basis of the traditional variable amplitude control strategy, and the mathematical relationship between the peak of inductive current and the output power under discontinuous conduction mode (DCM) and critical conduction mode is derived, and the peak of inductive current is accurately controlled accordingly. Secondly, the optimal working mode is selected for the peak value of inductive current at different loads to reduce the current stress and improve the efficiency of the converter. Finally, a 300 W experimental prototype is built to verify the proposed control strategy. The results show that compared with the traditional method, the proposed optimal control strategy can reduce the current stress by at least 8.34% and increase the peak efficiency by 2.15%.
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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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