Hardware-Efficient Programmable-Deviation Controller for Indirect Energy Transfer DC–DC Converters

Stability Analysis of Boundary and Hybrid Controllers for Indirect Energy Transfer Converters

“…A Programmable-Deviation Controller has been recently presented in [10]. The controller, schematically presented in Fig.…”

“…To further improve the system performance and reduce the total volume of the converter, in particular for boost-type converters, reduction of the components' stress has been assigned as the primary performance goal [9]. This is achieved by defining the output voltage deviation as a control objective rather than the convergence time [10], [11].…”

“…Boundary controllers [12]- [18], among them hysteretic and sliding-mode controllers, are geometry based methods that split the state-plane such that in one side of the boundary the operation is governed by the on state and by the off state at the other side of the boundary. Hybrid controllers [1]- [8], [10], [11], [19]- [25] switch between two or more control laws based on the system state variables in order to obtain the performance goals. Within the context of switchmode applications, the hybrid control law typically incorporates a steady-state linear controller (i.e.…”

“…To overcome the challenges, hardware-efficient, control methods with reduced sensitivity to variations of parameters for buck and boost converters have been recently presented in [1], [10] and [11], [15], respectively. There, a hybrid controller combines a boundary-type control for large-signal transient events with a linear steady-state control law.…”

“…It is a further objective of this study to examine the behavior and the stability of the programmable-deviation controller for boost converters in [10] which includes the TOC as a particular case. It should be noted that in this paper, the analysis is not limited by the realization method of the controller (whether analog, digital or mixed-mode) as long that its operation can be described on the state-space.…”