TY - JOUR N2 - In a high-efficiency Class E ZVS resonant amplifier a matching and isolation transformer can replace some or even all inductive components of the amplifier thus simplifying the circuit and reducing its cost. In the paper a theoretical analysis, a design example and its experimental verification for a transformer Class E amplifier are presented. In the experimental amplifier with a transformer as the only inductive component in the circuit high efficiency ηMAX = 0.95 was achieved for supply voltage VI = 36 V, maximum output power POMAX = 100 W and the switching frequency f = 300 kHz. Measured parameters and waveforms showed a good agreement with theoretical predictions. Moreover, the relative bandwidth of the switching frequency was only 19% to obtain output power control from 4.8 W to POMAX with efficiency not less than 0.9 in the regulation range. L1 - http://www.czasopisma.pan.pl/Content/85010/PDF/08_paper.pdf L2 - http://www.czasopisma.pan.pl/Content/85010 PY - 2014 IS - No 4 December EP - 633 DO - 10.2478/aee-2014-0043 KW - Class E amplifier KW - resonant inverter KW - DC-DC converter KW - transformer KW - leakage inductance A1 - Mikolajewski, Mirosław PB - Polish Academy of Sciences VL - vol. 63 DA - 2014 T1 - A Transformer Class E Amplifier SP - 621 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/85010 T2 - Archives of Electrical Engineering ER -