Implementation of Energy based Controller for Buck Boost Converter using FPAA

Abstract

This paper presents an application of Field Programmable Analog Array (FPAA) in the implementation of an energy-based controller to control the voltage of a buckboost converter. The converter is a non-linear and non-minimum phase system with variable structure, which is an interesting topic in control engineering. The non-linear controller obtained using the port-Hamiltonian approach exhibits impressive performance. However, parasitic resistance in the inductor and other components brings steady state error in the output. To solve this issue, an outer loop with an integrator is added. The use of an FPAA makes it easier to implement the developed controller compared to using a microcontroller because the controller can be directly synthesized by connecting the analog blocks.