TY - JOUR N2 - The problems connected to developing inductive power transfer IPT systems in aspects of high efficiency and suppression of electromagnetic field (EMF) emission are discussed. It is shown how important it is to compensate for large leakage impedance of IPT coils (air transformer) to improve efficiency of high power transfer. Such compensation circuits operating with resonant frequencies at soft switching conditions additionally allow for reduction of switching losses in power semiconductor devices of converters. The consideration has been illustrated and verified by experimental results measured on two different test stands (50 kW with planar coils and with two 12 kW receiver coils) built in a laboratory of the Łukasiewicz Research Network – Electrotechnical Institute. L1 - http://www.journals.pan.pl/Content/113672/PDF/12_789-798_01266_Bpast.No.67-4_21.08.19_K.pdf L2 - http://www.journals.pan.pl/Content/113672 PY - 2019 IS - No. 4 EP - 798 DO - 10.24425/bpasts.2019.130188 KW - contactless energy transfer KW - inductive power transfer KW - resonant compensation circuits KW - electromagnetic field distribution A1 - Miśkiewicz, R.M. A1 - Anczewski, P. A1 - Moradewicz, A.J. VL - 67 DA - 31.08.2019 T1 - Analysis and investigations of inductive power transfer (IPT) systems in terms of efficiency and magnetic field distribution properties SP - 789 UR - http://www.journals.pan.pl/dlibra/publication/edition/113672 T2 - Bulletin of the Polish Academy of Sciences Technical Sciences ER -