Full
Outline
In response to the challenges posed by fluctuating load power and reduced efficiency due to variations in the angle and position of a receiving coil, a parity time (PT) symmetric spatial wireless power transfer system based on coil switching is proposed. First, the mathematical model of a cubic structure is established, which is endowed with double-layer space spiral coils on all of its six sides. Simulation results verify that under the condition of equivalent turns and radius, the double-layer coil exhibits a larger inductance and a better coupling performance than the single-layer space spiral coil, and the corresponding design is more compact. Second, the operating frequency and transmission characteristics of SS compensation throughout the whole coupling region are derived. Given the frequency splitting phenomenon existing in the PT symmetric region, a primary-side frequency detection coil switching strategy is put forward to enable adaptive switching in different power supply regions. Finally, experimental validation was carried out, and results show that under specific frequency conditions in a three-dimensional space, the receiving coil can consistently maintain a stable power output of 18 W and an efficiency exceeding 80%, with power fluctuations remaining within 6.7%, thereby validating the effectiveness of the proposed strategy.
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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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