Design of Anti-Saturated Coil for Robust Wireless Power Transfer in Magnetic Latching System

The paper proposed an anti-saturated coil to alleviate magnetic saturation and inductance reduction in wireless power transfer systems with permanent magnets. The proposed anti-saturated coil forms a magnetic field in the opposite direction of the permanent magnet, canceling out the influence of the permanent magnet. Therefore, the magnetic material of the WPT system allows operation in the linear region. The effectiveness of the anti-saturated coil was proven through simulation, and it was demonstrated that applying the proposed coil improved the inductance reduction rate by about 10% compared to the system without it.