Coil alignment method for wireless charging system of electric vehicle

The invention discloses a coil alignment method for a wireless charging system of an electric vehicle. The method comprises the following steps: firstly, applying alternating current excitation to a receiving coil of the wireless charging system, and generating an alternating magnetic field with specific geometric characteristics in a charging area; and then detecting a magnetic field generated by a receiving coil of the wireless charging system by using the planar coil array. A charging area induced voltage distribution image is reconstructed through an interpolation algorithm according to induced voltages obtained by different coils, the direction and the position of a receiving coil are calculated in combination with geometrical characteristics of an excitation magnetic field, and corresponding information is displayed on vehicle-mounted display equipment in real time, so that a reference is provided for the coil alignment process of the wireless charging system of the electric vehicle. And a driver is gui