電源周波数と異なる共振周波数の中継回路を用いた磁界結合型非接触給電の効率改善

抄録

In this study, a relay resonance circuit is used transmitted power to the sensor module using four-parallel cubic coils, and the efficiency decrease with the change in the transmission distance is investigated experimentally. The relay resonant circuit used was examined for resonant frequencies that were near the usable frequency. A square coil was used as the receiving coil. Using Vector Network Analyzer (VNA), the S-parameters were measured with the transmitting and receiving coils as 2 ports, and after converting the S-parameters to Z-parameters, the theoretical maximum efficiency η_max was calculated. The distance variation characteristics using each relay resonance circuit were investigated. As a result, it was found that the theoretical maximum efficiency was improved when relay coils were used, and that the theoretical maximum efficiency tended to increase when the resonance frequency was slightly larger than the frequency of the power supply circuit.