A Hybrid Control Algorithm for Voltage Regulation in DC–DC Boost Converter

Abstract

Abstract-A new switching control algorithm based on state trajectory approximation is proposed to regulate the output voltage of a representative second-order dc-dc converter-the boost converter. The essence of the proposed algorithm is to trap the system into a stable limit cycle while ensuring the required voltage regulation. Unlike some of the earlier algorithms, the concept is applicable to both continuous and discontinuous current modes of operation, making it viable over a wide operating range under various load and line disturbances. A hybrid-automaton representation of the converter is used to perform the analysis, and the control problem is simplified to a guard-selection problem. Guard conditions, governing the transition of the converter operation from one discrete state to the other in a hybrid-automaton representation, are derived. The hybrid-automaton-based control system is implemented by using the state flow chart feature of MATLAB, and extensive simulations are carried out to check the suitability of the algorithm. The hybrid control law is also validated in real time by using a laboratory prototype. The experimental and simulation results prove the effectiveness of the proposed control law under varying line and load conditions.

Fuzzy Controlled ZVS Asymmetrical PWM Full-bridge DC-DC Converter for Constant load High Power Applications

“…Takagi-Sugeno fuzzy model-based robust fuzzy logic controller and fuzzy load conductance observer for DC-DC boost converter is designed [16]. State trajectory approximation based new control scheme for regulate the output voltage of DC-DC converter is presented [17]. By using this control algorithm converter is maintained its stable limit cycle to ensure voltage regulation.…”

Stabilization of autonomous linear time invariant fractional order derivative switched systems with different derivative in subsystems

“…However, the design of a switching strategy is generally very challenging. Some practical examples for switched systems are automated highway systems, automotive engine control system, networked control systems, chemical process, power systems and power electronics, robot manufacture, and stepper motors [1][2][3][4]. Some methods such as multi-Lyapunov functions and convex combination of vector fields have been used widely in the study of the integer order switching systems which is closely related to some investigations on differential inclusions [7][8][9][10].…”

Design and implementation of an observer controller for a buck converter

“…The average value of the inductor current is inversely proportional to the location of this zero; therefore, any increase in the value of the inductor current may reallocate this zero to the lower frequency side of the right-hand side of the plane. This results in considerable phase lags, thereby restraining the existing bandwidth for a constant operation of the converter [6]. This enables the design to be carried out in the time domain.…”