Patent ID: 9517700
Filing Date: 2016-12-13
CPC Classification: B60L,H02J,Y02T

Claim Text:
1. A method of contactless charging of a battery of an electric automotive vehicle by magnetic induction between an emitting resonant circuit including an emitting coil of a charging device and a receiving resonant circuit of the vehicle including a receiving coil, the vehicle being positioned above the emitting coil for magnetic coupling between the emitting coil and the receiving coil, the method comprising: commanding an electrical power supply together with setpoints of an inverter across terminals of which is linked the emitting coil in a variable frequency; measuring in an analog circuit a value of a current and of a voltage across the terminals of the emitting coil; computing, by using an analog circuit, a phase shift between the current and the voltage; converting the phase shift into a numerical value; and slaving a frequency of the setpoints dispatched to the inverter to the numerical value of the phase shift, wherein the slaving is implemented by a proportional integral regulator, a value of a proportional gain of the proportional integral regulator and a value of an integral gain of the proportional integral regulator optimize a rate of convergence of the frequency of the inverter to the predetermined value.