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Design and Implementation of Bi-Directional DC-DC Converter for Wind Energy System  [PDF]
K. Suresh, Dr. R. Arulmozhiyal
Circuits and Systems (CS) , 2016, DOI: 10.4236/cs.2016.711311
Abstract: This paper proposes a design and implementation of the bi-directional DC-DC converter for Wind Energy Conversion System. The proposed project consists of boost DC/DC converter, bi-directional DC/DC converter (BDC), permanent magnet DC generator and batteries. A DC-DC boost converter is interface with proposed wind system to step up the initial generator voltage and maintain constant output voltage. The fluctuation nature of wind makes them unsuitable for standalone operation. To overcome the drawbacks an energy storage device is used in the proposed system to compensate the fluctuations and to maintain a smooth and continuous power flow in all operating modes to load. Bi-directional DC-DC converter (BDC) is capable of transforming energy between two DC buses. It can operate as a boost converter which supplies energy to the load when the wind generator output power is greater than the required load power. It also operates in buck mode which charges from DC bus when output power is less than the required load power. The proposed converter reduces the component losses and increases the performance of the overall system. The complete system is implemented in MATLAB/SIMULINK and verified with hardware.
Power quality improvement in switched mode power supplies using two stage DC-DC converter
S Singh, G Bhuvaneswari, B Singh
International Journal of Engineering, Science and Technology , 2012,
Abstract: This paper deals with an improved power quality multiple output switched mode power supply (SMPS) using two stage DCDC converter. A non-isolated buck-boost DC-DC converter is used as the first stage whereas single ended primary inductance converter (SEPIC) is used in the second stage. The first stage of buck-boost converter is designed in discontinuous conduction mode (DCM) for inherent power factor (PF) correction. Design and simulations of the two stage DC-DC converter with load variations on the SMPS are performed in MATLAB software to demonstrate the effectiveness of the multiple output DC-DC converter to have a stiff voltage regulation and negligible ripple.
Fuzzy Controller for Matrix Converter System to Improve its Quality of Output  [PDF]
Nagalingam Mahendran,G. Gurusamy
Computer Science , 2010, DOI: 10.5121/ijaia.2010.1402
Abstract: In this paper, Fuzzy Logic controller is developed for ac/ac Matrix Converter. Furthermore, Total Harmonic Distortion is reduced significantly. Space Vector Algorithm is a method to improve power quality of the converter output. But its quality is limited to 86.7%.We are introduced a Cross coupled DQ axis controller to improve power quality. The Matrix Converter is an attractive topology for High voltage transformation ratio. A Matlab / Simulink simulation analysis of the Matrix Converter system is provided. The design and implementation of fuzzy controlled Matrix Converter is described. This AC-AC system is proposed as an effective replacement for the conventional AC-DC-AC system which employs a two-step power conversion.
An Efficient DC- DC Converter with Bidirectional Power Flow  [PDF]
N.RAJARAJESWARI,K.THANUSHKODI
Annals of Dunarea de Jos , 2008,
Abstract: This paper introduces a Bi-directional DC-DC converter with adaptive fuzzy logic controller. Bidirectional power flow is obtained by same power components and provides a simple, efficient, and galvanically isolated converter. In the presence of DC mains the converter operates as buck converter and charges the battery. When the DC mains fails, the converter operates as boost converter and the down stream converter is fed by the battery. The power switches are controlled by Pulse Width Modulation technique and the pulses are generated by the application of fuzzy logic with an adoption algorithm. The proposed converter is simulated using MATLAB and laboratory prototype was developed to validate the simulation results.
Digital Implementation of Two Inductor Boost Converter Fed DC Drive
G. Kishor,D. Subbarayudu and S. Sivanagaraju
Research Journal of Applied Sciences, Engineering and Technology , 2011,
Abstract: The study deals w ith simulation and implementation of two inductor boost converter fed DC drive. The two inductor boost converter fed DC drive is simulated and implemented. The circuit has advantages like higher output voltage and improved power factor. The laboratory model is implemented and the experimental results are obtained. The experimental results were compared w ith the simulation results.
Fuzzy Controller for Matrix Converter System to Improve Its Quality of Output
N.Mahendran,G.Gurusamy
International Journal of Artificial Intelligence & Applications , 2010,
Abstract: In this paper, Fuzzy Logic controller is developed for ac/ac Matrix Converter. Furthermore,Total Harmonic Distortion is reduced significantly. Space Vector Algorithm is a method to improve powerquality of the converter output. But its quality is limited to 86.7%.We are introduced a Cross coupled DQaxis controller to improve power quality. The Matrix Converter is an attractive topology for High voltagetransformation ratio. A Matlab / Simulink simulation analysis of the Matrix Converter system is provided.The design and implementation of fuzzy controlled Matrix Converter is described. This AC-AC system isproposed as an effective replacement for the conventional AC-DC-AC system which employs a two-steppower conversion.
Implementation and Control of an AC/DC/AC Converter for Double Wound Flywheel Application  [PDF]
J. G. Oliveira,H. Schettino,V. Gama,R. Carvalho,H. Bernhoff
Advances in Power Electronics , 2012, DOI: 10.1155/2012/604703
Abstract: An all-electric driveline based on a double wound flywheel, connected in series between main energy storage and a wheel motor, is presented. The flywheel works as a power buffer, allowing the battery to deliver optimized power. It also separates electrically the system in two sides, with the battery connected to the low voltage side and the wheel motor connected to the high voltage side. This paper presents the implementation and control of the AC/DC/AC converter, used to connect the flywheel high voltage windings to the wheel motor. The converter general operation and the adopted control strategy are discussed. The implementation of the AC/DC/AC converter has been described from a practical perspective. Results from experimental tests performed in the full-system prototype are presented. The prototype system is running with satisfactory stability during acceleration mode. Good efficiency and unity power factor could be achieved, based on vector control and space vector modulation. 1. Introduction Extensive research has been recently done on Electric Vehicles (EVs) [1, 2]. The development of an efficient and robust propulsion system is essential to the feasibility of EVs [3]. But, even though sophisticated engines and advanced electrical power trains exist, the main issue, the long-term energy storage, has not been resolved. All-electric drivelines based on battery, supercapacitor, flywheel, and combinations of these are being widely discussed and tested, attempting to lower the requirement on power density from the batteries [4, 5]. The propulsion system in development at Uppsala University is based upon a double wound flywheel energy storage device [6]. The flywheel under study is physically divided into two voltage levels through the stator winding. The high voltage side of the flywheel is connected to the wheel motor, whereas the low voltage side is connected to the battery, as shown in Figure 1. The system is bidirectional and the power can either flow from the battery to the wheel motor (acceleration mode) or from the wheel-motor to the battery (regenerative braking) [7]. Figure 1: All-electric driveline schematics: The power can flow in both directions. In acceleration mode, the flywheel function is basically to provide the variant power requested by the wheel motor, so that the battery delivers a smoother output power. In braking mode, the wheel motor acts as a generator, and the flywheel is responsible for storing the regenerated energy. The system needs a considerable number of power electronics converters and electronic controllers in order
POWER FACTOR CORRECTION IN PERMANENT MAGNET BRUSHLESS DC MOTOR DRIVE USING SINGLE-PHASE CUK CONVERTER
SANJEEV SINGH,BHIM SINGH
Journal of Engineering Science and Technology , 2010,
Abstract: Permanent magnet brushless DC motor (PMBLDCM) drives are being employed in many variable speed applications due to their high efficiency, silent operation, compact size, high reliability, ease of control, and low maintenance requirements. These drives have power quality problems and poor power factor at input AC mains as they are mostly fed through diode bridge rectifier based voltage source inverters. To overcome such problems a single-phase single-switch power factor correction AC-DC converter topology based on a Cuk converter is proposed to feed voltage source inverters based PMBLDCM. It focuses on the analysis, design and performance evaluation of the proposed PFC converter topology for a 1.5 kW, 1500 rpm, 400 V PMBLDCM drive used for an air-conditioning system. The proposed PFC converter topology is modelled and its performance is simulated in Matlab-Simulink environment and results show an improved power quality and good power factor in wide speed range of the drive.
Simulation and Implementation of Interleaved Boost DC-DC Converter for Fuel Cell Application  [cached]
Ahmad Saudi Samosir,NFN Taufiq,Abdul Halim Mohd Yatim
International Journal of Power Electronics and Drive Systems , 2011, DOI: 10.11591/ijpeds.v1i2.126
Abstract: This paper deals with a boost dc-dc converter for fuel cell application. In fuel cell electric vehicles application, a high power boost dc-dc converter is adopted to adjust the output voltage, current and power of fuel cell engine to meet the vehicle requirements. One of challenge in designing a boost converter for high power application is how to handle the high current at the input side. In this paper an interleaved boost dc-dc converter is proposed for current sharing on high power application. Moreover, this converter also reduces the fuel ripple current. Performance of the interleaved boost converter is tested through simulation and experimental results. Keywords: component; Interleaved Boost Converter; Fuel Cell Electric Vehicle; high power application.
Fuzzy Controlled Parallel AC-DC Converter for PFC  [cached]
M Subba Rao,Ch Sai Babu,S Satyanarayana,P. V.S Sobhan
Advances in Electrical and Electronic Engineering , 2011,
Abstract: Paralleling of converter modules is a well-known technique that is often used in medium-power applications to achieve the desired output power by using smaller size of high frequency transformers and inductors. In this paper, a parallel-connected single-phase PFC topology using flyback and forward converters is proposed to improve the output voltage regulation with simultaneous input power factor correction (PFC) and control. The goal of the control is to stabilize the output voltage of the converter against the load variations. The paper presents the derivation of fuzzy control rules for the dc/dc converter circuit and control algorithm for regulating the dc/dc converter. This paper presents a design example and circuit analysis for 200 W power supply. The proposed approach offers cost effective, compact and efficient AC/DC converter by the use of parallel power processing. MATLAB/SIMULINK is used for implementation and simulation results show the performance improvement.
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