Wireless power transfer using a superconducting capacitor

Yu, Haizhou; Zhang, Guomin; Liu, Guole; Liu, Qi; Jing, Liwei

doi:10.1016/j.physc.2018.10.013

Cited by 2 publications

(1 citation statement)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the low loss and large critical current density properties of high-temperature superconducting (HTS) materials, superconducting WPT systems with HTS coils have been found to be more efficient and have been considered as a potential charging tool for electric vehicles [14][15][16]. By introducing high-Q HTS electrode capacitors to form superconducting LC-resonators (consisting of an inductance and a capacitor), those systems can be improved further [17][18][19]. However, the superconducting resonators reported so far have no frequency-tuning functionality because of the fixed capacitance of developed capacitors.…”

Section: Introductionmentioning

confidence: 99%

A tunable superconducting LC-resonator with a variable superconducting electrode capacitor bank for application in wireless power transfer

He¹,

Wang²,

Yan³

2019

Supercond. Sci. Technol.

View full text Add to dashboard Cite

The frequency alignment of resonators is essential for wireless power transfer (WPT) systems to achieve strongly coupled magnetic resonances. Here, we present a novel tunable superconducting resonator for WPT applications. The tunable resonator is composed of a high-temperature superconducting (HTS) coil and a variable HTS electrode capacitor bank based on two series YBa2C3O7−x–SrTiO3–YBa2C3O7−x thin films. The HTS coil serves as a wireless transmitting tool for power delivery, while the HTS electrode capacitor bank provides a frequency-tuning element for the resonator. At 77 K, the HTS materials cause low loss and thus achieve a high quality factor, while the incipient ferroelectric SrTiO3 substrate with HTS electrodes has a nonlinear capacitance dependence on the applied electric field with no hysteresis. A voltage supply applies a continuous DC bias to both capacitors synchronously via the coil, adjusting the total capacitance and thus the resonant frequency. Our results indicate that the tunable resonator can achieve a tuning range of 12% from 775 kHz, offering a frequency-tuning functionality to superconducting WPT technology.

show abstract