Simulation Of DC-DC Converter Research Articles

Dynamic Modelling and Simulation of DC-DC Converters

The DC-DC converter is an electrical circuit that transfers energy from a dc source to an electrical load. [1] The energy is first transferred into the energy storage elements by using the electronic switches, and then afterwards from the storage elements to the load. The storage elements are inductors and capacitors. [2] The transient analysis of the convertersis important to see the dynamic performance of the circuit. The simulations are to be performed to observe the effects of the values of inductor and capacitor on the dynamic performance of the converters. To facilitate the simulation process, the differential equa- tions are formulated into the state-space model of the circuit. The DC-DC converter has the special distinction of being a system of variable structure, that is, the circuit topology changes in accordance with the switching action of the semiconductor devices. The state-space model, therefore, must describe the dynamic behavior of the circuit for each portion of the switching cycle. In this project, the MATLAB software will be used for the state-space model simulation of the converters to see the dynamic performance of the converters in the continuous conduction mode (CCM) and discontinuous conductionmode (DCM).

Modeling and Simulation of DC DC Converters for Fuel Cell System

This paper deals with the modeling and simulation of suitable DC-DC converters for Fuel cell system. In the field of renewable energies, power electronics and fuel cell technologies play an important role. As the fuel cells become the main power source for portable applications, demand for fuel cells will increase. A highly efficient converter is an essential requirement in this application and a core parameter of the device as a whole. Therefore, a high efficient converter has to be designed for fuel cell system as the output voltage of fuel cell is low. In this paper, various DC-DC converters such as Boost converter, SEPIC, LUO converter and ZETA converter with fuel cell as an input source are designed and the same is simulated using MATLAB. Total Harmonic Distortion analysis of all the DC-DC converters is carried out and the suitable converter for fuel cell application is selected based on the low Total Harmonic Distortion value.

Design and Analysis of DC-DC Converters for Photovoltaic Systems

The solar energy conversion system is an alternative for conventional power generating system. The voltage which is available from solar array is variable and to obtain a stable voltage from solar panels, DC-DC converters are required for constant power production. A PV module is designed in MATLAB-SIMULlNK using the S-function builder and controlled current source. The proposed PV module enables us to obtain its P-V and I-V characteristics at different temperature and radiations. This paper presents the design and simulation of DC-DC converters. In this paper, Boost converter, cascaded Buck Boost and Cuk converter are modelled in MATLAB and their results are compare

РАСЧЕТ МОЩНОСТИ ДВУНАПРАВЛЕННОГО ПРЕОБРАЗОВАТЕЛЯ ПОСТОЯННОГО НАПРЯЖЕНИЯ АВТОНОМНЫХ ПОДВОДНЫХ АППАРАТОВ

One of the ways to increase the efficiency of autonomous underwater vehicles is to use a DC electric power system. With the help of impulse control it is possible to achieve a stable voltage on consumers even with significant changes in the speed of the propeller rotation caused by waves, bottom relief, current, winds, course change, etc. Issues related to the simulation of DC-DC converters for autonomous underwater vehicles have been considered. The powers supplied from a DC power source to loading have been found. Possible ways of regulating the power and voltage at the output of the pre-driver are analyzed and performing the power and voltage adjustment by means of the phase angle to the inverting and rectifying bridges is proved to be expedient. At an angle of 90º, the current in the pulse transformer looks like a sinusoid in shape, and at the same time it is simple for piecewise linear approximation, which in turn makes it easy to determine the transmitted power over a period. Various variants of an output signal are presented under changing a phase angle of opening of IGBT-transistors. There have been illustrated oscillograms of the AC-DC converter and of the current type in the inductor. According to the calculations, the analytical solution was found to determine the transmitted power. A bi-directional DC converter was modeled using a Simulink package, which resulted in a voltage on the inductor and voltage on the load as a graphic dependence. The obtained dependences completely coincide with the theoretical analysis.

High Gain and Reduced Switch Stress DC-DC Converter Topology for PV System

This paper presents a new high step-up isolated DC-DC converter topology for photovoltaic system. The suggested configuration provides a converter with high voltage gain and reduced switch stress by using three coupled inductor with two hybrid voltage multiplier cell. The operation of the proposed converter is based on a charging capacitor with a single switch in its structure. A passive clamp circuit composed of capacitors and diodes is employed in the converter structure for lowering the voltage stress on the power switch as well as increasing the voltage gain of the converter. Since the voltage stress is low in the provided topology, a switch with a small ON-state resistance can be used. As a result, the losses are decreased and the efficiency is increased. The design of DC-DC boost converter is also discussed in detail. Simulation of DC-DC converter is performed in MATLAB/Simulink and the result are verified

Dynamics and Control of DC-DC Converters

DC-DC converters have many applications in the modern world. They provide the required power to the communication backbones, they are used in digital devices like laptops and cell phones, and they have widespread applications in electric cars, to just name a few. DC-DC converters require negative feedback to provide a suitable output voltage or current for the load. Obtaining a stable output voltage or current in presence of disturbances such as: input voltage changes and/or output load changes seems impossible without some form of control. This book tries to train the art of controller design for DC-DC converters. Chapter 1 introduces the DC-DC converters briefly. It is assumed that the reader has the basic knowledge of DC-DC converter (i.e., a basic course in power electronics). The reader learns the disadvantages of open loop control in Chapter 2. Simulation of DC-DC converters with the aid of Simulink® is discussed in this chapter as well. Extracting the dynamic models of DC-DC converters is studied in Chapter 3. We show how MATLAB® and a software named KUCA can be used to do the cumbersome and error-prone process of modeling automatically. Obtaining the transfer functions using PSIM® is studied as well. These days, softwares are an integral part of engineering sciences. Control engineering is not an exception by any means. Keeping this in mind, we design the controllers using MATLAB® in Chapter 4. Finally, references are provided at the end of each chapter to suggest more information for an interested reader. The intended audiences for this book are practice engineers and academians.

Design and Simulation of Dc-Dc Converter for Fuel Cell Operated Vehicle with Single Reference Six Pulse Modulation

Design and Simulation of Dc-Dc Converter for Fuel Cell Operated Vehicle with Single Reference Six Pulse Modulation