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Outline
Charging efficiency is an important index for evaluating the performance of a wireless charging system. A dual-loop control method based on current proportion is proposed to improve the charging efficiency of a layered magnetic coupling wireless charging system with dual transmitting coils, which can achieve constant voltage and constant current output while improving the system efficiency by approximately 4%. First, the working principle for the dual-transmitter wireless charging system based on LCC-S compensation network is introduced, a mutual inductance model is established, and the relationship between output voltage and current is deduced. Then, the coupling relationship between the changes in mutual inductance and system efficiency is studied, and a double closed-loop control method based on the optimal current proportion is proposed to achieve constant current and constant voltage output by outer-loop control and efficiency optimization by inner-loop control current distribution. Finally, the feasibility of the double closed-loop control strategy with optimal efficiency was verified by simulations and an experimental platform with 250 W.
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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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