I performed simulations of wireless power transfer in matlab simulink. It was powered with DC voltage which was then converted into a rectangular voltage with a frequency of several dozen kHz. The figures show a schematic diagram and a graph of the voltage obtained at the inverter output (red) and the voltage obtained at the L1 coil (black).
Why are there voltage surges in the voltage obtained on the coil? I noticed that these jumps occur when switching pairs of transistors in the inverter and that, the difference between the two sinusoids forming the voltage on the coil is the value of the set voltage.
Why is there a phase shift between primary and secondary voltages in this system?
I apologize in advance if this question has already been asked on the website or it is common knowledge that I did not assimilate. Please help.
V3-measuring voltage at the inverter output (yellow) V1-capacitor voltage measurement (red) V2-measuring coil voltage (blue)