| In this paper, a novel technology of wireless power transmission and conversion is proposedfor theory and application of supplying power efficiently to micro-pipe robots made by Giantmagnetostrictive material(GMM). Firstly, prerequisite and key conditions of wireless powertransmission are discussed; then, electromagnetic-mechanical multi-field dynamic strongcoupling model is proposed; thirdly, correctness of theory is validated by comparison oftheoretical and measured results of GMA prototype. It provides a complete set of analysis,evaluation and design methods for micro-pipe robot by using synchronous resonance. Mainpoints of this paper are as follows:(1) This paper studied deeply into the principle of electromagnetic resonant couplingtechnology, based on electromagnetic wave theory and coupled mode theory. A mathematicalmodel is proposed to describe wireless power transmission by electromagnetic resonant coupling.And the time domain solution of energy coupling is derived to discuss prerequisite, capacity,methods and means to maximize transmission efficiency.(2) A two-port network model based on high-frequency circuit theory is built, whilecoupled mode theory is employed as guiding ideology. Moreover, a wireless power transmissionprototype contains loosen helical coils is assembled for analyzing, computing and validating aset of problems such as transmission power, efficiency, frequency characteristic and loadinfluence.(3) On the aspect of modeling wireless power receiving and conversion, a multi-fielddynamic strong coupling model is proposed and validated through comparison with experimentalresults taking the influence of circuit, magnetic field, stress field, electromagnetic-mechanicalresonance into concern.(4) According to theoretical model and inherent characteristics of the material, frequency isoptimized and transmission efficiency is calculated. A prototype is designed based on completedesign method for electromagnetic-mechanical wireless power transfer and conversion.(5) Numerical method of electromagnetic-mechanical synchronous resonance is validatedand evaluated through theoretical computation and experimental measurement. Therefore,feasibility and effectiveness of electromagnetic-mechanical synchronous resonance andconversion is proved.It is first time that the problem of power transmission and conversion is concerned in thisproject through electromagnetic-mechanical synchronous resonance and new magneticfunctional materials. It provides a possible solution to transferring converting and controlling the energy between electromagnetic and mechanical field. The achievement of this researchfacilitates power supply in micro-pipe robots which is difficult to towing wires. |
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