Research On Parallel Transmission Method Of Signal And Power In LCLP Type ICPT System

With the continuous advancement of technology,wireless power transmission has received more and more attention in the field of electrical engineering.As a high-power wireless power transmission method,Inductive Coupling Power Transfer(ICPT)system overcomes the disadvantages of poor contact and leakage in the traditional power supply mode,and greatly reduces the redundancy and maintainability of the power transmission mode.However,in special occasions such as track circuits and vehicle-to-ground communications,not only the transmission of electrical energy but also the real-time transmission of signals is required.The ICPT system can realize the parallel transmission of signals and electric energy,but the influence of the signal transmission circuit on the power transmission efficiency of the ICPT system can not be neglected.The research on the parallel transmission method of signal and 0electric energy has important theoretical and practical significance.By analyzing the differences between the four basic resonant topologies and the hybrid resonant topologies,the LCLP-type ICPT system is used as the main circuit of the parallel transmission system of signals and power.By analyzing the difference between the four basic resonant topologies and the hybrid resonant topologies,the LCLP-type ICPT system is used as the main circuit of the signal and power parallel transmission system.And besides,using the FSK modulation and demodulation method,the coupling coil is added to the original and secondary sides to realize the signal transmission.The simulation verification is carried out in the MATLAB/Simulink software environment,and the bit error rate under different noise environments is further studied.Secondly,in order to verify the effectiveness of the transmission effect,after fully considering the influence of the signal coupling coil on the power transmission in the signal transmission circuit,the power transmission channel and the signals transmission channel are mathematically modeled before and after the introduction of the signal transmission circuit,respectively.The transmission characteristics of the spectrum analysis diagram and the frequency domain response diagram are analyzed.Finally,in order to improve the power transmission efficiency under the influence of signal transmission circuit,based on the influence of signal transmission circuit on power transmission,the PSO algorithm is used to optimize the resonance compensation parameters of the parallel transmission ICPT system,and in the MATLAB/Simulink software environment,the optimized parameters are verified by simulation,and the characteristics of the parallel transmission system before and after optimization are analyzed.Theoretical analysis and simulation verification show that the introduction of signal transmission circuit does not have a big impact on power transmission.The error rate ofsignal transmission is zero when SNR?4,which meets the requirements of parallel transmission.By plotting the BODE diagram and the spectrum analysis diagram,it is shown that the signal transmission circuit does not affect the power transmission characteristics;The optimization of the resonance parameters after considering the influence of the signal transmission circuit can make the power transmission efficiency reach 82.53%,which is5.52% higher than the same type of signal transmission method,and the load voltage harmonic distortion rate is 3.14% lower than that before optimization,based on MATLAB/Simulink.Simulation verification in the software environment shows the effectiveness of the optimization of the resonance parameters?...