Patent ID: 11870335
Assignee: BEIJING INSTITUTE OF TECHNOLOGY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 2:
3. The WPT system regulation method for implementing ZVS in a wide power range according to claim 2, wherein the determining an optimal switching frequency based on corresponding switching frequencies and phase-shift angles that meet ZVS at different expected output voltages of the WPT system specifically comprises:
for each expected output voltage of the WPT system, calculating, by using a Kirchhoff's voltage law, a phase-shift angle corresponding to each frequency that meets the expected output voltage in the frequency variation range of the frequency modulation method;
determining a curve, corresponding to each expected output voltage, of the minimum absolute value that is of the current of the inductor in the primary-side resonance compensation network and that varies with a frequency; and
determining an optimal switching frequency according to curves corresponding to all expected output voltages, wherein at the optimal switching frequency in all frequencies, a maximum quantity of minimum absolute values that are of the current of the inductor in the primary-side resonance compensation network and that are greater than 0 is obtained.