2021 Volume 29 Issue 1 Pages 155-160
A magnet alignment method using permanent magnets is useful as a positioning method for power transmitting and receiving coils in WPT. However, mounting permanent magnets on the power transmission / reception coil has the problem of causing magnetic saturation of the soft magnetic material. In this paper, by canceling out the magnetic field of the permanent magnet mounted on each of the power transmitting and receiving coils, the adsorption power is improved while suppressing the magnetic saturation. As a result of the power supply experiment, the power transmission efficiency of the power transmitting and receiving coil equipped with this method was improved by up to 26% compared to the state of magnetic saturation without the method.
