Simulation and experimental results for class D series resonant inverter

A numerical analysis of a Class D zero-voltage switching inverter in the time domain is presented, together with experimental results. A discrete-time state-space approach is used for simulation. The algorithm is fast, easy to implement, and suitable for systems with high spikes in the waveforms. Analysis shows that switching losses can be reduced by using a dead time in the transistor drive voltage and adding a single capacitor in parallel with one of the transistors. Zero-voltage switching can be achieved above the resonant frequency and in a limited range of load resistances. Numerical results are in good agreement with experimental ones