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In this paper, the mathematical modeling of Cuk converter operating in continuous conduction mode (CCM), is done by using the signal flow graph (SFG) method and Meyson gain formula. By using the obtained model, the output voltage to input voltage transfer function and also the output control transfer function are extracted. Moreover, the effects of equivalent series resistors (ESRs) on stability and...
In this paper a fuzzy logic controller for Solar powered DC -DC boost converter is planned. Here for simplification, the PV system is taken as a constant DC Voltage source. The output response of the boost converter, is controlled by changing its duty cycle and the controller is planned to change the duty cycle. The simulation is formulated by MATLAB simulation program and PSIM software. Using fuzzy...
In this paper high speed single output synchronous dc-dc boost converter is presented with type-III compensation network for power management in smart devices. Due to its quicker response time, it can handle load changes quickly as compared to other control techniques. Calculated phase margin and gain makes oscillation free output transient response. Input voltage is 1.8V, Inductance used is 600nH,...
Output dc voltage from Fuel Cell (FC)/Photo Voltaics (PV) needs to be conditioned and converted into ac form before integrating to grid. Normally, two stage converters are used for this purpose. Two stage converters have several disadvantages like low efficiency, more number of components, big size, etc. especially when they are operated at low input voltages. In this paper, a coupled inductor based...
The design of PWM sliding mode control for a novel frequency conversion circuit which called boost matrix converter is presented. The general situation of sliding mode control strategy and frequency converters are firstly introduced. The specific analysis of boost matrix converter and the derivation process of PWM sliding mode controller are clarified afterwards. Finally the system simulation result...
This paper presents an optimal nonlinear control scheme for a renewable-energy-based micro-grid. The optimal controller synthesis is based on the state-dependent Riccati equation approach, where it is considered the minimization of a performance index (cost functional), which results in an efficient control strategy. The micro-grid is used to integrate the energy from renewable resources, with the...
The conducted EMI simulation plays an important part in the SMPS in the product design. The analysis of common mode noise is much more complex than differential mode noise. The CE simulation accuracy depends on the accuracy of CM mode noise. CM noises are determined by the electric coupling between the voltage jump point and the ground. Traditional the CM models of the electric coupling between the...
An algorithm for state-space model generation using free software is proposed in the paper. The algorithm is based on circuit equations formulation using modified nodal analysis and their solving to provide state-space model. State-space model is generated in a symbolic form for all possible states of DC-DC converter operation. Determination of possible states is obtained by checking existence of...
This paper gives one possible application of Ćuk converter for telecommunication equipment power supply. Ćuk converter is controlled with cascade control system, with two regualtion loops, outer loop is voltage PI control loop and inner loop is current SMC (Sliding Mode Control) controlled loop. The control system also has input inductor current limiter, which is necessary in cases of large input...
The aim of our work is the implementation of a new approach for the dependability enhancement of a HDPE reactor (Skikda CP2K petrochemical plant) based on automated HAZOP analysis system including the digitization and automatization of the industrial system reliability analysis. After the system description, we present briefly the principle of the automated method. The system analysis in degraded...
10 kV, 120 A all-SiC half-bridge modules were tested and simulated for use in a 4 kV, 100 A power electronics building block (PEBB), which are standard, multifunctional units that can replace specialized devices in order to simplify the design and reduce the cost of power electronic systems. This PEBB design consists of four 10 kV SiC MOSFET modules in an H-bridge configuration. Each switch in the...
This paper presents modified topologies for the Z-source inverter. The main objective of the modifications are to get higher boost factor, less voltage stress across the switches as well as reduction of the number of passive components. Two types of inverter topologies are presented in this paper. They are ripple-input current proposed inverter (r-proposed inverter) and continuous-input current proposed...
Series connections of the cells of energy-storage devices such as electric double-layer capacitor (EDLC) and lithium-ion battery result in voltage imbalance in each cell because of the nonuniform properties of the individual cells. In previous work, the authors proposed a novel cell voltage equalization circuit using an LC series circuit. In the proposed circuit, the differences of the convergence...
In recent years, with the rapid development of renewable energy, power energy storage has become a bottom neck of its development, and superconducting magnetic energy storage (SMES) seems to be a viable solution. A topology based on common DC voltage bus is proposed for high power voltage source converter (VSC)-SMES. The mathematical model of SMES is constructed and the detailed control strategy is...
As it was mentioned in the first part, this paper is focused on the nonlinear behavior of the DC-DC converters. The Buck converter was chosen to apply different tools in order to analyze the stability of operation under voltage and current control. Also, besides the qualitative information given by the graphical methods used, the performances of the control techniques are evaluated in time and frequency...
A parameterized model for resonant clocking inductors embedded in a dense power grid was developed using extensive electromagnetic simulations. The resulting model was used to support resonant clock designs for the POWER8TM microprocessor. The model enabled tuning of the inductance attached to each clock sector to optimize its resonant behavior, resulting in a 33% reduction in clock power. Simulations...
For a dynamic loss minimization control for DC-to-DC converters, a transient loss analysis of a multiple-gap inductor designed for the 2010 Prius is presented in this paper. A transient core loss calculation algorithm based on an equivalent elliptical loop (EEL) is used for the time domain loss analysis. The algorithm is combined with finite element analysis (FEA), and the core loss and copper loss...
In this paper the important parasitic capacitances of chokes are analyzed and defined. This work contributes to a general understanding of capacitive coupling in wound elements. Based on calculations from previous studies a more precise, wide range algorithm is proposed to calculate these parasitic capacitances of toroidal chokes. With these results a method is presented to analytically predict the...
In this paper, the switching flow-graph models are developed to study the nonlinear behavior of DC-DC switching converters. Based on the concept of virtual switches and virtual switching functions, switching flow-graph (SFG) model are created easily without complex mathematics. The SFG modeling technique is helpful for undergraduate students or beginners to understand how the switching converters...
In this paper, using newly introduced analog adder and subtractor circuits, a new negative impedance converter, a lossy inductor simulator and an all-pass filter structure are presented. The proposed configurations have very simple structures containing only one or two adder/subtractor blocks together also with one or two passive elements. All capacitors used are grounded which is beneficial from...
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