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In order to improve the system performance, a field-circuit coupling algorithm is proposed to analyze the system performance, with the help of the concept of supercomputing. Frequency splitting is a phenomenon in wireless power transfer (WPT) system when the coupling distance is less than the splitting point, the load power changes from a single-peak curve to a double-peak curve driven by two non-intrinsic resonant frequencies. Asymptotic coupled mode theory (CMT) method is used to analyse the frequency splitting phenomena in WPT system. It provides detailed information about interaction of field strength under different coupling states through coupled solution of FEM and CMT. Over coupling, critical coupling and under coupling are three typical states classified by frequency splitting. Experimental results are acquired by two helical resonators. The overall system reaches the critical coupling state when resonators space 1.5\u200am and the total power on the load is 110\u200aW. Therefore, it is an efficient way to forecast transmission characteristics by using this method.<\/jats:p>","DOI":"10.3233\/jifs-179420","type":"journal-article","created":{"date-parts":[[2019,10,4]],"date-time":"2019-10-04T12:20:36Z","timestamp":1570191636000},"page":"463-469","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Finite element method and coupled mode theory coupling for accurate analysis of frequency splitting in wireless power transmission"],"prefix":"10.1177","volume":"38","author":[{"given":"Xian","family":"Zhang","sequence":"first","affiliation":[{"name":"Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology,  Tianjin Polytechnic University, Tianjin, China"}]},{"given":"Fengxian","family":"Wang","sequence":"additional","affiliation":[{"name":"Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology,  Tianjin Polytechnic University, Tianjin, China"}]},{"given":"Dawen","family":"Han","sequence":"additional","affiliation":[{"name":"Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology,  Tianjin Polytechnic University, Tianjin, China"}]},{"given":"Hao","family":"Meng","sequence":"additional","affiliation":[{"name":"Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology,  Tianjin Polytechnic University, Tianjin, China"}]},{"given":"Bin","family":"Wei","sequence":"additional","affiliation":[{"name":"China Electric Power Research Institute, Beijing, China"}]},{"given":"Songcen","family":"Wang","sequence":"additional","affiliation":[{"name":"China Electric Power Research Institute, Beijing, China"}]},{"given":"Yang","family":"Li","sequence":"additional","affiliation":[{"name":"Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology,  Tianjin Polytechnic University, Tianjin, China"}]},{"given":"Ming","family":"Xue","sequence":"additional","affiliation":[{"name":"Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology,  Tianjin Polytechnic University, Tianjin, China"}]},{"given":"Qingxin","family":"Yang","sequence":"additional","affiliation":[{"name":"Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology,  Tianjin Polytechnic University, Tianjin, China"}]}],"member":"179","published-online":{"date-parts":[[2019,10]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1109\/JPROC.2013.2243691"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1109\/TPEL.2013.2249670"},{"issue":"7","key":"e_1_3_2_4_2","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1109\/TMAG.2016.2529682","article-title":"Coil design and efficiency analysis for dynamic wireless charging system for electric vehicles","volume":"52","author":"Zhang X.","year":"2016","unstructured":"X.Zhang, Z.Yuan, Q.Yang, et al. 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