Dynamic Modeling Of Hybrid Feedforward Controlled Pulse Width Modulated Switching Converters

Hybrid feedforward control architecture is alternative to feedback control architecture and in many cases offers significant advantages over the later for synthesizing control of PWM converters. Stability of hybrid feedforward control architecture can be of concern and is analyzed here. To illustrate stability analysis, dynamic model is developed for two hybrid feedforward controllers implemented on DCM boost and four switch buck-boost converter-based PFC rectifiers. The dynamic model developed is shown to match with accurate time domain simulations for the cases presented. Experimental results verifying stable operation of the loop are also presented.