Mk. Kazimierczuk et T. Nandakumar, CLASS-D VOLTAGE-SWITCHING INVERTER WITH TAPPED RESONANT INDUCTOR, IEE proceedings. Part B. Electric power applications, 140(3), 1993, pp. 177-185
A steady-state analysis and experimental verification are given for a
Class D voltage-switching inverter whose resonant circuit consists of
a resonant capacitor in series with a tapped inductor. The analysis of
the inverter is carried out in the frequency domain using Fourier ser
ies techniques. Design equations describing the steady-state operation
are derived. It is found that the DC-to-AC voltage transfer function
of the inverter is almost independent of the load variations at a swit
ching frequency higher than the resonant frequency. In addition, the c
ircuit has high efficiency over a wide range of load resistance. A pro
totype of the inverter was built and tested at an output power of 64 W
using IRF730 power MOSFETs. The theoretical and experimental results
show excellent agreement.