Switching boundary geometry and the control of single-phase inverters

A geometric approach to switching power converter control design is investigated for the single-phase voltage-sourced inverter. A method for deriving switching boundaries based on steady-state trajectories of the asymptotic model is presented as a generalization of the DC-DC converter case. It is shown that for an elliptical switching boundary, it is possible to produce sinusoidal output without any time-varying reference signal. The nonlinear feedback control law derived provides two degrees of freedom for adjustment of steady-state performance. Simulation and experimental results for the proposed controller are summarized.<>