Study On Tuning Control Strategy Of Inductively Coupled Power Transfer

Inductively coupled power transfer (ICPT) technology, as an emerging wirelessenergy transfer technology, is based on the principle ofFaraday law of electromagneticinduction, which can overcome many shortcomings and deficiencies of the traditionalmethods of power transmission, and have broad application prospects. To operateefficiently,the system must be sure to work in perfect resonance，so always havecompensation circuit topology in ICPT system. However, the changes of output load,the coupling coefficient changes and other environmental factors can lead to the drift ofthe system natural resonance frequency, which will lead to system detuning, so it isnecessary to introduce tuning strategy of ICPT. This paper is surrounding resonantstatus, determining method of resonant status and the tuningstrategy.The paper analyzes the interference of multi-point soft-switching to traditionalresonance determining method, inverter circuit output impedance angle detectionmethod, and the tuning strategy based on it, including tuning strategy based onphase-locked loop, tuning strategy based on compensation capacitance matrix, andbased on the research of phase inductance tuning strategy, finally proves the thelimitation of traditional tuning strategies, then put forward a kind of inductively coupledpower transfer system resonance methodbased on the energy flow to overcome theinterference.Based on the inductively coupled power transfer system resonance methodbasedon the energy flow,puting forward a kind of tuning strategy with segment Bang-Bangcontrol. To solve the problem that tuning is not ideal, when the strategy is used in theICPT system with of mixed resonant topologies compensation,based on the inductivelycoupled power transfer system resonance methodbased on the energy flowthe paper putforward a kind of tuning strategy with fuzzy control, in order to realize the efficienttuning of the different resonant induction coupling compensation topology. withMATLAB simulation software, simulates the resonant status based on energy input andoutput, prove its feasibility, accuracy and efficiency. on this basis, build anexperimental platform to perform the experiments.