Design and evaluation of class DE inverter with band-pass filter
Motoki Katayama, Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi
IEICE Technical Committee on Energy Engineering in Electronics and Communication, pp.133-138, Jan., 2007. [pdf document]

<Abstract>

In this paper, class DE inverter with second order constant K band-pass filter is proposed. In the proposed inverter, the band-pass filter is used instead of the resonant filter in class DE inverter presented at the previous papers. By using band-pass filter, two important results can be got. One is the sensitivity of the output voltage to the operating frequency is suppressed by using band-pass filter. The other is that zero voltage switching operation appears when the operating frequency is lower than the nominal frequency. Moreover, it keeps the advantage of class DE inverter with resonant filter, that is, high power conversion efficiency under high frequency operation because of class E switching. The laboratory experiments achieve 90.4% power conversion efficiency under 1.98W output power and 1.0 MHz operation.