Simulation of Switching Converters on the Level of Averaged Voltages and Currents

A new technical paper by researchers Aleksandra Lekić and Predrag Pejović introduces an advanced algorithm for simulating switching power converters. The core innovation is performing simulations on the level of averaged voltages and currents rather than instantaneous switching events. This is achieved by applying a 'switching cell' concept to create an averaged circuit model, then reconstructing the detailed waveform shapes using quasi-steady-state and linear ripple approximations. This approach significantly reduces computational complexity compared to traditional switch-level simulation.

The algorithm's robustness is demonstrated by applying it to all three fundamental DC-DC converter topologies: buck, boost, and buck-boost. It also successfully handles a flyback converter, which required a slight generalization of the core switching cell concept. Crucially, the method covers converters operating in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), making it a versatile tool for real-world design scenarios where operating conditions can vary. The work provides a bridge between simplified averaged models and computationally intensive detailed simulations.