Full
Outline
For the problem of reduced charging performance of wireless charging systems caused by dynamic changes in equivalent load, parameter drift, or system detuning due to factors such as mismatched components, an optimized solution from the perspectives of constant current/voltage charging, system efficiency improvement, and dynamic tuning is proposed. A magnetic flux controllable inductor (MFCI) technology is adopted at the transmitting end to achieve system power control. In contrast, an improved half-controlled rectifier (IHCR) at the receiver end enhances system efficiency and ensures the resonance state. Firstly, the system circuit topology is analyzed to derive equations that show the relationship between key system parameters, charging current/voltage, and system efficiency. The necessity of using a MFCI and an IHCR to enhance system efficiency is explained. Subsequently, these devices are modeled, and their circuit topology and working principles are analyzed. Then, a closed-loop control strategy is analyzed, and the feasibility of the proposed method is verified through PLECS circuit simulation. Finally, a system experimental platform is established, and the experimental results indicate that the designed closed-loop controller can achieve constant current charging (5 A) and constant voltage charging (67.2 V) when the load varies from 9.60 Ω to 134.40 Ω, with a maximum system efficiency of 91.8%.
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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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