Modeling H-bridge inverter based on PI control and its nonlinear dynamic behaviour

In the H-bridge inverter, control and circuit topology parameters are key factors affecting its dynamic stability, changes of each parameter have different effects on stability system. This paper takes current-controlled first-order passive inverter based PI as research object. Firstly, modal circuit, an accurate discrete iterative mapping model is derived according to stroboscopic principle. Then iterate through above formula, after retaining data current peak value, bifurcation diagram system obtained, with behavior stable working area being analysed when change, verified by folding correctness analysis. Finally, same method, influence other studied. The results show that there critical maximum or minimum values keep running stably.