| Wreless power transmission(WPT)is the frontier and hot topic of current power technology.Compared with wired power transmission technology,WPT voids bare wires,has the characteristics of convenient power transmission and safe power consumption,and can effectively reduce the use of chemical batteries and environmental pollution.At present,there are three ways of WPT technology mainly,microwave far-field transmission,electromagnetic coupling and magnetic resonance.Among them,the WPT technology based on the principle of magnetic resonance has made breakthroughs in both efficiency and transmission distance.However,the current magnetic resonance technology is based on the resonance coil,which has the problems of narrow bandwidth and sensitivity to environmental changes,and it is very costly when applied to dynamic power transmission.In this paper,a new type of WPT system based on transmission line coupling is proposed,which replaces magnetic resonance coil with standing wave coupling on transmission line,and realizes a WPT system based on transmission line.The coupling of transmission lines is analyzed in theory,and we use the simulation platform CST Microwave Studio to simulate the coupled model from static non-contact coupling to dynmic non-contact coupling,we discuss the anti-offset of the transmission mode.Finally we build the experimental platform to validate the efficiency and flexibility of the new WPT system.The results show that the proposed transmission line coupling WPT system has high efficiency:Simulation coupling efficiency reaches 95%in static static non-contact coupling,In the aspect of dynamic non-contact coupling,the coupling efficiency of simulation is over 90%,and the coupling efficiency of dynamic non-contact coupling is as high as 80%under rough experimental test.The anti-offset capability is strong:within the range of 20%lateral offset,the coupling efficiency basically does not change;and the bandwidth is wide:the working bandwidth reaches 10%. |
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