Hybrid Control of a Tri-state Boost Converter

Abstract

Abstract-A tri-state converter has three controllable switches and hence has more operating flexibility. This also brings II. HYBRID MoDELING oF A TM-sTATE CoNvERTER additional control design flexibility when viewing the converter as A tri-state converter has three controlled switches as shown a hybrid dynamical system. The operational and control design in Fig. 1. This control flexibility helps to shape the current and flexibility of a trn-state boost converter is explored in this paper to control its output voltage. The analysis and control design for the voltage waveforms easily as per the user requirement. Durng converter is based on an exact hybrid automaton model. The its operation, a ti-state converter assumes three different hybrid control design is carried out to ensure the required voltage configurations or structures. It is by switching between these regulation and switching stability. Using a system theoretical structures, that the desired control objective is achieved.approach, a geometrical region in the state plane around the set point is determined as a stable 'safe-set' by ensuring that a vector VL field of the system pointing towards the set point always exists to ensure the stability of switching in the converter. Within this S3 stable region, the guards for the hybrid automaton model are L determined as the switching control law to satisfy the regulation l requirements. The control algorithm is tested using a model of the S2 tri-state boost converter constructed in MATLAB/SIMULINK L environment. Modeling, analysis, control design and simulation results are presented. Using the proposed control scheme, it is + found that the tni-state converter can work with a wide range of Vin~Si Cv R loads and input voltages without compromising on regulation requirements.

Robust Switching Rule Design for Boost Converters with Uncertain Parameters and Disturbances

“…Recently, a unified method for fast modeling of DC-DC switching converters in the continuous conduction mode and discontinuous conduction mode was proposed in [28]. A tristate converter was modeled as a switched affine system, and a controller was designed to ensure that the corresponding closed-loop system is always stable in the safe set [29]. In [27], a hybrid feedback switching rule based on the common Lyapunov function approach was applied to a Buck converter.…”

Comparison of Mode Switched Controllers for a Pseudo Continuous Current Mode Boost Converter

“…Similarly, there is an additional flexibility in the control design based on hybrid model of a PCCM boost converter because of the inherent stability in such an operation as evidenced by the Poincare map of the periodic oscillations [7]- [8]. This paper compares three design approaches based on the hybrid automaton model [9], namely, system theoretical design [10]- [11], circuit theoretical design [12] and energy based design [13], for a PCCM boost converter.…”