Wireless power transfer using a superconducting capacitor
| Autor: | Liwei Jing, Guomin Zhang, Guole Liu, Qi Liu, Hui Yu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Superconductivity Resistive touchscreen Materials science business.industry Energy Engineering and Power Technology Hardware_PERFORMANCEANDRELIABILITY Condensed Matter Physics 01 natural sciences Capacitance Electronic Optical and Magnetic Materials law.invention Compensation (engineering) Capacitor Hardware_GENERAL law 0103 physical sciences Hardware_INTEGRATEDCIRCUITS Optoelectronics Maximum power transfer theorem Wireless power transfer Electrical and Electronic Engineering 010306 general physics business Electrical conductor |
| Zdroj: | Physica C: Superconductivity and its Applications. 562:85-89 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/j.physc.2018.10.013 |
| Popis: | It has been demonstrated that a high temperature superconducting (HTS) wireless power transfer (WPT) system has the advantages of higher power transfer efficiencies and longer transmission distances. But the resistive losses of the conventional compensation capacitors, the copper connectors and the long copper connecting wires between the HTS coils in the liquid nitrogen and the conventional compensation capacitors outside still exist. Since at low frequencies the power transfer efficiency of a WPT system is dominated by the resistive losses (and at high frequencies by radiation) of the WPT system and the AC loss of superconductors is much lower than that of conventional conductors, using superconducting capacitors as the compensation capacitors is an optional way to further increase the power transfer efficiency. Here, a superconducting capacitor was constructed. Two kinds of HTS WPT experiments were conducted by use of the superconducting capacitor and the conventional capacitor as the transmitting compensation capacitor, respectively. The results are presented and analyzed. It is shown that though the capacitance of our superconducting capacitor changed a little, for the distance up to 1.5 times of the radius of the coils, the efficiency of the WPT system can be increased by 4.25% by using the superconducting capacitor as the transmitting compensation capacitor. |
| Databáze: | OpenAIRE |
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