Method and system for adjusting double-sided lcc compensation network of wireless charging system

A system for adjusting a double sided inductor-capacitor-capacitor (LCC) compensation network of a wireless charging system, the system comprising:

• wherein the wireless charging system comprises a primary-side direct current voltage source, a high-frequency inverter, a primary-side compensation circuit, a primary-side transmitting coil, a secondary-side receiving coil, a secondary-side compensation circuit, a rectifier, a load, and a controller, and the system for adjusting the double-sided LCC compensation network comprises:
• a first obtaining module, configured to obtain a standard coupling coefficient when the primary-side transmitting coil is aligned with the secondary-side receiving coil, a rated operating frequency, and rated parameter values of compensation elements in the wireless charging system, wherein the compensation elements comprise a primary-side compensation inductor, a primary-side series compensation capacitor, a primary-side parallel compensation capacitor, a secondary-side compensation inductor, a secondary-side series compensation capacitor and a secondary-side parallel compensation capacitor;
• a module for determining change rates of a parameter capable of reflecting output performance of the wireless charging system, configured to determine, based on changes in parameter values of the compensation elements, the change rates of the parameter capable of reflecting the output performance of the wireless charging system, wherein the parameter capable of reflecting the output performance of the wireless charging system comprises the output power, the output voltage, or the maximum singular value of a transfer function;
• an adjustable compensation element determining module, configured to determine an adjustable compensation element based on the change rates of the parameter capable of reflecting the output performance of the wireless charging system, wherein the adjustable compensation element is a compensation element corresponding to the largest change rate of the parameter capable of reflecting the output performance of the wireless charging system;
• a real-time coupling coefficient obtaining module, configured to obtain a real-time coupling coefficient between the primary-side transmitting coil and the secondary-side receiving coil;
• a determining module, configured to determine whether the real-time coupling coefficient is less than a coupling coefficient threshold;
• a first adjustment module, configured to adjust an operating frequency of the wireless charging system when the real-time coupling coefficient is not less than the coupling coefficient threshold, wherein a range of the operating frequency is 81.38 kHz to 90 kHz;
• and
• a second adjustment module, configured to adjust both the operating frequency of the wireless charging system and the adjustable compensation element when the real-time coupling coefficient is less than the coupling coefficient threshold.