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This paper studies the nonlinear behaviors of the half-bridge buck converter when the load resistance changes. The characteristics of the study are considered as the inductor current in the continuous conduction mode. Firstly, the converter is equivalent to two switching states and is derived into the equivalent mathematical model. According to this model, using MATLAB/ SIMULINK tool to build a half-bridge...
This paper investigates the nonlinear phenomena in a current-mode controlled buck-boost DC-DC converter with solar cells. The converter is operated in continuous conduction mode (CCM) with inductor current. It is also controlled by varying reference current to study the occurrence of nonlinear phenomena from the initial periodic steady-state to period-doubling bifurcation into the last chaos condition...
This paper investigates the nonlinear behaviors when the switching frequency changed in the UC3842 current-mode controlled flyback converter. First, State equations of the flyback converter are derived. The converter in continuous conduction mode (CCM) is then considered. Second, MATLAB/SIMULINK is used to construct simulation of the converter whose operation under varying switching frequency parameters...
This study investigates the instability phenomena of an active power factor corrector (PFC) circuit based on a buck-boost converter. First, the circuit is analyzed, and the state space mathematical model of the converter is derived. Second, Matlab/Simulink and IsSpice are used to construct and simulate the voltage-mode control model of the buck-boost power factor corrector. The intermediate-scale...
This work investigates fast-scale instability phenomena and chaotic control of voltage-controlled single-phase full-bridge inverter via varying load resistance. First, the operational principles of a voltage-controlled single-phase full-bridge inverter are examined and the mapping state-space equations are generated. Additionally, the MATLAB/SIMULINK tool is adopted for experimental simulation in...
It is evident that effective control over chaos in the forward converter is very important for engineering applications. In this paper, a mathematical model of the forward converter is firstly derived. Secondly, the nonlinear phenomenon in the forward converter is discussed, and then we apply the method of time-delay feedback control over chaos in the forward converter. The validity of this method...
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