## 5 Simulation and Experimental Verification
### Experimental Verification  
In order to verify the correctness of theoretical analysis and simulation verification, a multi-output inverter experimental setup, as shown in Figure 18, was constructed based on the parameters in Table 4. The experimental setup included a DC power supply, an auxiliary power supply, an FPGA controller, a proposed multi-output inverter, resonant compensation networks, transmitting and receiving coils, and loads. The DC power supply was responsible for providing the DC input for the proposed inverter. The auxiliary power supply ensured a stable power supply for the power switch drive chips. The FPGA controller was used to generate drive signals for power switches. Both the transmitting and receiving coils were wound using Litz wire. The two coils were the same size. The inner diameter was 8 cm, the outer diameter was 14.5 cm, and the turn was 32. The distance between the two coils was 11 cm. The voltage probe, current probe, oscilloscope, and power analyzer were used to measure and display experimental results.  
Figure 19 shows the experimental waveforms of the switch driving signal and inverter output voltage when \(D\) = 0.5 and \(D_{1}\) = \(D_{2}\) = 0.25, where (a-c) represents the first and second outputs, the first and third outputs, and the first and fourth outputs, respectively. When the input voltage was 50 V, the amplitude of each output voltage of the inverter was around 100 V, and the phase difference between each waveform was the same as the simulation results, which proves that the proposed inverter can achieve multi-output capability. Figure 20 shows the experimental waveforms corresponding to two outputs of the inverter, including the inverter output voltage, transmitting coil current, and load voltage, where (a,b) correspond to the LCC-S and S-S topologies, respectively. It can be seen that the output voltages of the inverter were all square waves, and the transmitting coil current and the load voltage were sine waves. The amplitude and phase of each waveform were consistent with the simulation verification, proving the output capability of the proposed inverter.  
The experimental waveforms of load switching are shown in Figure 21. In the LCC-S resonant compensation network, the load switched from 5 \(\Omega\) to 10 \(\Omega\). It can be seen that after the load switching, the inverter output voltage and load voltage remained stable, and the load current was reduced by half, which verifies the CV output characteristics of the LCC-S topology. At the same time, it also indicates that the inverter output voltage can still remain stable during the switching of the system operating state, verifying the stability of  
Figure 18: Experimental setup.  
the proposed inverter. In the S-S resonant compensation network, the load switched from 10 \(\Omega\) to 5 \(\Omega\). After the load was switched, the inverter output voltage and load current remained unchanged, and the load voltage was reduced by half, which was consistent with the simulation and verified the CC output characteristics of the S-S topology.  
Figure 19: Experimental waveforms of drive signals of power switches and inverter output voltages when \(D\) = 0.5 and \(D_{1}\) = \(D_{2}\) = 0.25. (**a**) The first and second outputs. (**b**) The first and third outputs. (**c**) The first and fourth outputs.  
Figure 20: Experimental waveforms of two outputs of the inverter. (**a**) LCC-S; (**b**) S-S.  
Figure 22 shows the efficiency and loss distribution of the proposed inverter. The efficiency of the proposed inverter increased gradually with the increase in input voltage and then tended to stabilize, with a peak efficiency of about 92.5%. Overall, the efficiency of the proposed inverter was high. Among the various losses of the proposed inverter, switching loss accounted for the highest proportion.