Study On Inductively Coupled Power And Data Transmission System

For the traditional power transmission technology,the contactless inductive coupled power transfer(ICPT)is a big breakthrough.It has advantages of low cost,high flexibility and so on.However,it is not so good for the state of the art technology to keep working stably and effectively in the air,in an untraditional environment is even more of a challenge.In order to expand the application of this technology,this paper focuses on the methodology and apparatus for high-frequency data signal transmission based on the power transmission system.Power and information transmission could be realized in the air and sea environments in short distance at last.Firstly,the principle and structure of the contactless ICPT system was discussed,and its key technologies were introduced and analyzed.The transfer system was designed to three parts: energy transformation,transformer and receiving device.A structure of loosely coupled transformer with higher transfer efficiency and higher stability was devised.A mathematical modeling and simulation about the transformer were described,and through experimentation,the possibility of this method is proved.Then,a resonant topology for improving the power transfer capability and efficiency was designed,and a comparison test with different environments was performed.In the latter case,efficiency up to X % could be achieved in the air.The result also reveals that the efficiency of wireless power transmission in the sea water is lower than that in the air.The best structure's efficiency could be up to 90% of that in the air.Secondly,a method of data transmission based on the power transmission system was given.It is significant for expanding the contactless ICPT system's application areas.Review of the literatures,a structure of electromagnetic contacted the power and data transmission circuit was designed,and the design principle for the power coils and data coils were also proposed.To keep the method working reliable,this paper put an emphasis on calculating the interference between the power and the data transmission,and a measure was taken to eliminate the effect at last.Finally,the data transmission system based on the power transmission was designed.Taking the transmission media into consideration,the paper put an emphasis on the high-frequency electromagnetic transmission in the sea water.According to Maxwell equation theory,some parameters and characteristics of the electromagnetic wave in the sea water were calculated and analyzed.Then through research and experimentation,this paper described a way of selecting the applicable carrier frequency to use in underwater communication.At last,the data transmission system based on the time-frequency shift keying(TFSK)modulation was showed,and the BER result showed this way of transmission obviously more matched...