Study On Inductively Coupled Power Transfer And Full-Duplex Communication System For Embedded Mechanical Condition Monitoring Equipment

Inductively coupled power transfer(ICPT)technology has the advantages of flexible and simple design,stable and reliable power transfer,strong anti-jamming capability of channels,which has great application prospects in implantable medical devices,wireless charging vehicles,aerospace,sliding rail devices and other fields.When the power transmission is realized,it is often necessary to obtain the running state of the device,and the upper computer sends instructions to control the device.At the same time,the data collected by the device should also be sent to the upper computer,which requires the ICPT system to have the capability of two-way data transmission.With the ICPT system as the research object,the inductively coupled power transfer and communication system for embedded mechanical condition monitoring equipment is designed,which is realized the full-duplex communication function without affecting the energy transmission.In the power transfer system,the LCC-S power transfer system is designed by analyzing the advantages and disadvantages of different compensation networks.The system adopts LCC high-order compensation structure at the primary side and low-order series compensation structure at the secondary side,so that the system has the characteristic of constant voltage output.At the same time,the power transfer system can easily realize the ZVS(Zero Voltage Switch)soft Switch of the inverter circuit,which plays an important role in improving the power transfer efficiency.In the signal transfer system,the forward signal transfer is realized based on amplitude modulation of electric energy and the reverse signal transfer is realized based on ASK(Amplitude Shift Keying)modulation technology.In order to realize efficient full-duplex communication between forward and reverse signal transfer,the frequency selection network is designed between the signal transfer channel and the power transfer channel to realize the isolation between the signal transfer channel and the power transfer channel,thus the signal transfer system and the electric energy transfer system are guaranteed to be carried out effectively.According to the designed composite power and signal transfer system,the feasibility of the scheme is verified theoretically by circuit simulation software,at the same time,the optimal element parameters are selected according to the simulation results.And then the hardware experimental platform is built to comprehensively verify the power and signal transfer system.The experimental contents mainly include the experiment of power and efficiency of electric energy transfer,the experiment of forward signal transfer and reverse signal transfer,and the experiment of full-duplex data transfer.The experimental results basically achieve the expected effect,and can achieve full-duplex data transfer without affecting the power transfer.