| 摘要 |
<p>Provided is a parameter derivation method for deriving a parameter for a wireless power transmission system that transmits power from a power transmission device to a power receiving device via electric field coupling, the parameter including a coupling coefficient (ke) for an electric field coupling unit constituted by an active electrode and a passive electrode in a power transmission device and a power receiving device. The coupling coefficient (ke) is derived on the basis of a prescribed operational expression by using resonance frequencies (ω1, ω2) or anti-resonance frequencies (ω00, ω0) of an input impedance that were measured in a state where the active electrode and the passive electrode of the power receiving device are open, and resonance frequency (ωr) or anti-resonance frequency (ωa) of the input impedance that were measured in a state where the active electrode and the passive electrode of the power receiving device are short-circuited. Thereby, provided is a practical method for deriving a parameter closer to an actual state in a wireless power transmission system that transmits power from a power transmission device to a power receiving device via electric field coupling.</p> |
