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Dc-capacitor voltage drift phenomenon is the main technical issue of an n-level (n>;3) Diode-Clamped Converter (DCC). This paper presents a predictive current control strategy for a three-phase five-level DCC which enables simultaneous control of ac-side currents and balance of capacitor voltages. The paper derives a discrete-time dynamic model of a five-level DCC. Based on the derived model, a...
In this paper, Inductor Average Current Mode Control (IACMC) is proposed to regulate single phase Power Factor Correction (PFC) Buck-Boost Converter (BBC) operated in Continuous Conduction Mode (CCM). The Proportional-Integral (PI) controller is acts as an outer voltage loop and the IACMC is used in the inner current loop for PFC BBC. The proposed IACMC has advantages such as robustness when there...
This paper reports the modeling and simulation aspects of a peak current controlled power-factor-correction converter (PFC), which is widely used in switch-mode power supply applications. The main objective is to show the real behavior of this converter operating under specific conditions. Firstly, a numerical simulation based on a discrete model is used. Analysis of this model shows that chaos and...
This paper introduced the operation principle of current mode control boost converter. The equations of two different work states were built by applying the theory of KCL and KVL. Two models working in CCM and DCM were respectively established using Matlab/Simulink and the nonlinear phenomenon of boost converter can be observed through simulation. The results of theoretical analysis are corresponded...
This paper presents the chaotic behavior of boost converter for switching courses in current control mode by discrete equations. This behavior is demonstrated by presenting a piecewise linear discrete map for this converter and then combining the feedback equation to obtain the overall equation of the converter. After obtaining the overall equation, exact map behavior is then studied. For this purpose,...
This paper proposes a predictive algorithm for AC-DC three phase converter with active power factor correction. The control proposed does not have current feedbacks and the input current levels are controlled by the DC voltage loop. The main idea of this algorithm is to take the three phases converter like a sequence of two converters working simultaneously and the equations modeled was approximated...
The unified power flow controller (UPFC) is nowadays one of the most useful Flexible AC Transmission Systems (FACTS), allowing the simultaneous control of the bus voltage and line active and reactive power. This paper presents the model, cross-coupling free current mode control approach, simulations and experimental results in static and dynamic conditions of a current mode controller for the UPFC...
This paper proposes the digital charge control method to boost converter operating with a type of nonlinear load, the constant power load. The constant power load is modeled theoretically, and model parameters are given in detail. Transfer functions of the boost converter with constant power load are deduced, and a small-signal model of the charge controlled current inner loop is presented. The digital...
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