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Voltage control of self excited induction generator Voltage control of self excited induction generator Новинка

Voltage control of self excited induction generator

4839 руб.
Today the world is looking towards the efficient energy generation from renewable energy sources because of extinction of fossil fuels.Wind energy is a promising source of green energy.But the problem associated with this kind of energy id due to varying wind speeds the out put is also varying so it is not possible to integrate it to grid.Here Induction generators are dominantly used because of their advantages in variable speed torque characteristics.In this book an attempt is made to discuss different types of generators used in wind energy and different topologies for control of voltage and frequency of Self Excited induction generator are discussed and new promising methods are proposed for low cost power generation.
The self excited induction generator The self excited induction generator Новинка

The self excited induction generator

7790 руб.
The objective of the harnessing of such non-conventional energy sources could be achieved in a big way by the development of the suitable low cost generating systems. The self excited induction generator (SEIG) is a suitable power generation source utilizing renewable energy sources due to its advantages as compared to conventional synchronous generator. SEIG can generate single phase and three phase power using three phase induction motor. The SEIG has a major drawback of poor voltage regulation. For this purpose, a suitable control scheme is to be developed such that the load on the SEIG remains constant despite the change in the consumer load. One way to regulate the voltage and frequency of the SEIG is to maintain a constant load at its terminals. Also, such control scheme should be simple, economical, rugged and reliable. The use of DSP gives cost effective solution with least hardware complexity. The performance of SEIG can be further improved with STACOM based controller for reactive power compensation or voltage source converter with bidirectional active and reactive power flow capability.
Wound Rotor Induction Generator Scalar Modeling and Control Wound Rotor Induction Generator Scalar Modeling and Control Новинка

Wound Rotor Induction Generator Scalar Modeling and Control

6390 руб.
In the field of electrical power generation, the wind energy is one of the important sources of renewable energy. The main problem with this type of energy is the variable nature of the wind speed. The wound rotor induction generator is used to handle this speed variations by adequate voltage injections in the rotor circuit to maintain the stator voltage and frequency constant irrespective to speed or load variations. This book deals with the analysis, steady state modeling, and control of the wound rotor induction generator that can be used in wind energy applications. Moreover the linear control strategy used is analyzed in terms of all its operating conditions and output quality. The theory was validated via experimental setup to compare theoretical, simulation and practical results to evaluate the usefulness and effectiveness of the system.
DIY ZVS Tesla Coil Power Supply Boost Voltage Generator Drive Board Induction Heating Module DIY ZVS Tesla Coil Power Supply Boost Voltage Generator Drive Board Induction Heating Module Новинка

DIY ZVS Tesla Coil Power Supply Boost Voltage Generator Drive Board Induction Heating Module

8.7 руб.
DIY ZVS Tesla Coil Power Supply Boost Voltage Generator Drive Board Induction Heating Module Specification: Size: 74mm x 77mm Input voltage: DC 12V-30V Output: HVDC, About 800 times of input voltage Power requirements: Less than 12V 5A, above 15V 15A Operating frequency: 30kHz-50kHz adaptive Secondary parameters: 5T + 5T Feature: 1. Using military FR4-A material 1.6mm double-board circuit board, power line extra add tin and optimizes line width of MOS tube drive circuit. 2. Using two IRFP250N power field pipe, large current, small internal resistance, super-power. 3. Using 1.25 copper wire large inductance, more stable performance. 4. Using 1% precision metal film resistors. 5. Use 25 * 24 * 16mm thick anti-static cooling. 6. Using MKP 0.33UF 1200V two parallel resonant capacitor for high frequency. Precautions: 1. After finish the installltion, carefully check it and verify that all components soldered correctly 2. Please note that the positive and negative signs of input power, carefully check to prevent reverse burning plate 3. The test voltage is recommended for the low power 12v, prevent mis-wiring problems or cause burning plate 4. Drive board limit input is DC 30v, current 10A, not recommended using limits, do not long working under overvoltage and overcurrent conditions. Driver board is not suitable for induction heating, if you need induction heating, it is recommended input voltage 15v or less. For induction heating or long use high-power must need to add the cooling fan, if poor heat dissipation, it will result in MOS tube temperature is too high, will accelerate the aging of MOS tube even burn and other issues. Note: This is a DIY kit, you need to have electronic knowledge and ability. Package includes: 1 x ZVS Tesla Coil Power Supply Boost Voltage Generator
Enhancement of Power System Stability by Using DFIG Based Wind Farm Enhancement of Power System Stability by Using DFIG Based Wind Farm Новинка

Enhancement of Power System Stability by Using DFIG Based Wind Farm

5490 руб.
Due to random variations of wind speed, output power of a wind turbine generator fluctuates continuously. The power and voltage quality of a wind power system consisting of Induction Generator (IG) based wind turbine (IGWT), IGWT with voltage control device and Doubly Fed Induction Generator (DFIG) based wind turbine (DFIGWT) are presented in this work. Blade pitch angle control to limit the output power at turbine’s nominal power is also presented. It is reported that the DFIG-based wind turbine system can smooth the output power and also maintain the terminal voltage at a desired level, as DFIG with two back-to-back voltage source converters that use IGBTs and a capacitor acts as the DC voltage source has real and reactive power control abilities. The comparative results show that DFIGWT-based wind farm (DFIG_WF) has the best response, IGWT-based wind farm (IGWF) with voltage control device has better and IGWF has the worst response. Results indicate that the fluctuation of output power at higher rated rotor speed (near turbine’s base wind speed) and terminal voltage are almost nil for DFIG_WF. All the analysis were carried out using SimPowerSystem tool box in MATLAB.
INDUCTION MOTORS Dynamics and Vector Control INDUCTION MOTORS Dynamics and Vector Control Новинка

INDUCTION MOTORS Dynamics and Vector Control

4429 руб.
Vector control is a method for dynamic control of the speed torque and power factor of the induction motor through permanent control of the intensity and the angle of the space vectors of the electromagnetic variables. The basic idea of the Field Oriented Control (FOC) algorithm is decoupling the stator current into flux and torque producing components. Both components can be controlled separately after decoupling. The structure of the motor controller is then as simple as that for a separately excited DC motor. Direct vector FOC control system is based on measurement, acquisition and (or) estimation of the space angle of the rotor’s flux. Unlike the control system which is oriented to the space vector of the rotor’s flux, on the dynamic model in a d-q coordinate system of IM and PWM of the voltage inverter, thereby using linear control technique and linear controllers, the direct torque control systems (DTC) are based on the space angle of the stator flux, on the dynamic model of the induction motor in a stationary frame of reference and on the space-vector modulation of the inverter. DTC method is based on non-linear control techniques and non-linear controllers.
Power Electronic Interfaces in Wind Energy Systems Power Electronic Interfaces in Wind Energy Systems Новинка

Power Electronic Interfaces in Wind Energy Systems

4929 руб.
The greatest contribution to researchers, who are working on renewable power generation sources especially on wind energy systems. The author explores different type of power electronic interfaces connected to isolated loads or grid. The book gives complete idea about the different approaches for steady-state analysis of self excited induction generator. The book must read for basic concepts and detail understanding about the possible power electronic interfaces in wind energy systems.
Harmonic Impact and Optimization of Distributed Generation Harmonic Impact and Optimization of Distributed Generation Новинка

Harmonic Impact and Optimization of Distributed Generation

6390 руб.
A comprehensive study is made to compare the harmonic distortion produced by the different types and number of distributed generation (DG) units in a low voltage distribution system. Here, three types of DG units are considered, namely, a mini hydro power, wind turbine doubly fed induction generator and photovoltaic system. To determine the maximum allowable penetration level of inverter based DG, harmonic resonance phenomena and harmonic distortion limits are also considered. To control harmonic propagation in a distribution system with DG units, an appropriate planning of DG units is considered by determining optimal placement, sizing and voltage control of DG units. Thus, an effective heuristic optimisation technique such as improved gravitational search algorithm (IGSA) technique is also developed for determining the optimal placement, sizing and voltage control of DG units in a radial distribution system.
Three Phase Low Voltage Induction Motor Drive Three Phase Low Voltage Induction Motor Drive Новинка

Three Phase Low Voltage Induction Motor Drive

4839 руб.
The emphasis on the theoretical study and simulation of the three phase induction motor drives is certainly due to the fact of fatal hazards associated with the high voltage and current signals present in the three phase induction motor drives. Other important feature is the cost of a full-scale drive system to test various switching, control and protection strategies. Therefore, design stage comes after a reasonable confidence and verification of the drive circuit and control strategies through simulations. In this work, a laboratory-scale low-voltage induction motor drive is designed which operates at 24 volts, accompanying with the simulations using Matlab and Simulink.
Controlling Of Two-phase Induction Machine By Supply Phase Shift Controlling Of Two-phase Induction Machine By Supply Phase Shift Новинка

Controlling Of Two-phase Induction Machine By Supply Phase Shift

6690 руб.
In this book a phase-difference angle (PDA) controlled pulse width-modulated (PWM) inverter instead of phase voltage modulation and/or frequency changing is proposed to control the speed, and position of a two-phase induction motor. Several characteristics of a two–phase induction motor driven by the PDA inverter are studied to verify the improvement of the motor performances. Also, speed, and position tracking are achieved using the proposed control technique. The book covers in more details the main principles characteristics of the two-phase induction motor especially at voltage, frequency, PDA changing. The difference among them is studied carefully to conclude the best control method. For unbalanced operation of the two-phase induction motor when used either as a servomotor or single-phase applications. The method of symmetrical components transformation is used to simplify the steady state analysis of the machine.. An experimental prototype, which consists of a PC computer based controller, a PDA inverter, and two phase induction motor is used to verify the validity of the proposed control technique .
Protection of Three Phase Induction Motor using PIC18F4431 Protection of Three Phase Induction Motor using PIC18F4431 Новинка

Protection of Three Phase Induction Motor using PIC18F4431

4529 руб.
Three phase induction motors are widely used in many industrial applications.As these operate on electric supply and have mechanical moving parts,they often face electrical and mechanical faults. the electrical faults like overvoltage, overcurrent, overload, single phasing are have to be taken care of. The PIC microcontroller 18F4431 is provided with 8 PWM generators to create and control PWM to control voltage and speed of motor. with the help of this advanced chip we can protect this three phase induction motor
Response and Control of a Wind Farm of Different Zones and Generators Response and Control of a Wind Farm of Different Zones and Generators Новинка

Response and Control of a Wind Farm of Different Zones and Generators

7790 руб.
For a wide areas wind farms,that composed of many connected zones of different wind turbines and different generators, this book aims to study , model , and simulate of a wind farm model that includes a wind turbine and three different types of generators. The proposed generators are , three phase synchronous generator, three phase squirrel-cage induction generator and three phase doubly-fed induction generator, these generators are the main machines that generally used in the field of wind energy generation. All generators are connected in parallel at the point of common coupling (pcc) and connected to the utility grid. Different line faults are simulated, and wind power system stabilization is achieved using pitch controller. Several experimental results were taken and discussed in this book.
Speed Control of Induction Motor Using Microcontroller Speed Control of Induction Motor Using Microcontroller Новинка

Speed Control of Induction Motor Using Microcontroller

4839 руб.
-- To implement speed control of induction motor. -- To implement closed loop volt per hertz technique based speed control of induction Motor using Matlab Simulink. -- To implement the above proposed model using Microcontroller (8051) -- This type of drive is suitable for applications which do not require high levels of accuracy or precision, such as pumps and fans. -- Low cost because there is no feedback device, the controlling principle offers a low cost and simple solution to controlling economical AC induction motors.
HCW520 Auto-Induction Remote Control Flying Ball with Music HCW520 Auto-Induction Remote Control Flying Ball with Music Новинка

HCW520 Auto-Induction Remote Control Flying Ball with Music

577.56 руб.
HCW520 Auto-Induction Remote Control Flying Ball with Music / Dazzling Light - Transparent + White
The Science of Self–Control The Science of Self–Control Новинка

The Science of Self–Control

2377 руб.
The Science of Self–Control
Control of Designed Developed Six Phase Induction Motor Using MATLAB Control of Designed Developed Six Phase Induction Motor Using MATLAB Новинка

Control of Designed Developed Six Phase Induction Motor Using MATLAB

4839 руб.
This project was sponsored by M/s Jyoti Switchgear Ltd, Mogar, Anand, Gujarat, India for actual design and development of prototype six phase Induction Motor. Control of the designed developed six phase Induction motor was carried out using Matlab Software by simulation. The Actual Control was sponsored by "Vacon-India Ltd", Chennai, India This is a research work for Ph.D. in Electrical Engineering, The Maharaja Sayaji University-Faculty of Technology- Department of Electrical Engineering, Baroda.
E27 Infrared Voice Control Induction Light Shell Cover - White E27 Infrared Voice Control Induction Light Shell Cover - White Новинка

E27 Infrared Voice Control Induction Light Shell Cover - White

1375.09 руб.
Material ABS Color White Quantity 1 Piece Rate Voltage 220V Working Current 1.5 A Connector Type E27 Other Features Induction distance: 8m Packing List 1 x E27 infrared induction light shell
Self-Excited Oscillations of Elastic Tubes Self-Excited Oscillations of Elastic Tubes Новинка

Self-Excited Oscillations of Elastic Tubes

6690 руб.
The phenomenon of self-excited oscillations of elastic tubes induced by fluid-structure interaction is studied. The study is mainly motivated by vessel collapse and self-excited oscillations observed in the human body. The mixed formulation of the finite element is used for the simulation of the structure. The structure model is three-dimensional and uses a hyperelastic material description. Four material models are implemented: the Neo-Hookean model, the Mooney-Rivlin model, the isotropic Gent model and the anisotropic Gent model. The fluid is considered as a Newtonian liquid, modeled by the artificial viscosity approach. The fluid solver uses a spatially one-dimensional. Both the structure and fluid solver are validated by seven benchmarks with an analytical solution. The strong coupling of the structure and fluid solver is used. The steady-state dependence of the tube cross-section with respect to the transmural pressure is investigated for different collapse modes. The unsteady behaviour is studied and self-excited low-frequency oscillations are found. A comparison with experimental data, obtained by other authors on the Starling resistor set-up line, is carried out.
Coordinated and Optimal Voltage Control In Active Power Distribution Coordinated and Optimal Voltage Control In Active Power Distribution Новинка

Coordinated and Optimal Voltage Control In Active Power Distribution

5090 руб.
One of the main technical challenges of an active distribution network is to maintain an acceptable voltage level in the system. This has initiated efforts in using various voltage control strategies to regulate the network voltage profile so that the voltage is maintained at its allowable voltage limits of 0.95 per unit to 1.05 per unit. A number of voltage control methods have been applied to solve voltage control problems associated with the connection of DGs in a distribution system. These voltage control strategies may be classified as decentralised or distributed and centralised or coordinated voltage control. In this work, different decentralised voltage control methods have been considered, namely, power factor control, on load tap changer control and generation curtailment control. From the literature, a number of coordinated voltage control strategies have been implemented to provide better and faster control to the system. In this research, the three decentralised voltage control methods are coordinated using fuzzy logic by considering the load bus voltages and DG power as inputs and the voltage control actions as the outputs.
Ride-Through Fault Capability of Doubly-Fed Induction Wind Generators Ride-Through Fault Capability of Doubly-Fed Induction Wind Generators Новинка

Ride-Through Fault Capability of Doubly-Fed Induction Wind Generators

7390 руб.
Due to the continuing growth of the installed power capacity of wind farms worldwide, the grid codes define specific requirements to the connection of wind turbines to the grid. One of these requirements is the ride-through fault capability (RTFC), that is, the equipment capability of continuing operating during voltage sags. This book presents the analysis of the behavior of the doubly-fed induction generator technology (DFIG) during balanced and unbalanced voltage sag and proposes novel control strategies to improve the RTFC. The system behavior analysis and the strategies validation are performed using mathematical models in time and frequency domains, simulation results with a Simulink/Matlab model (2MW) and experimental results in two scaled test benches (4kW and 25kW). The limitations for the operation of the strategies are also analyzed. The main objectives of this work are to point the system weaknesses and to contribute to the study of low voltage ride-through strategies (LVRT) of the DFIG technology.
Modeling & Fault Diagnosis of IM by using Intelligent Control Modeling & Fault Diagnosis of IM by using Intelligent Control Новинка

Modeling & Fault Diagnosis of IM by using Intelligent Control

7790 руб.
This book as it is clear from the title, deals with various aspects of control of induction motors. The authors tried to make this book so easy to understand especially for the graduated and non graduated students. More than 50 Simulink circuits and 469 equations and 174 figures have been implemented to be as commence of the students to build their algorithms. Starting with an introduction about induction motor, part of the book dealing with control topics begins with vector control with high performance drive system and gives details about how to implement it, main parameters, Simulink implementation, vector control with encoder and without encoder is the main types of vector control in this book. Direct torque control principle with Simulink implementation. Scalar control either open loop or closed loop methods used in low performance drive systems are considered with Simulink implementation of each type. The modeling of the induction motor with all reference frames is introduced combined with induction motor modeling under stator open winding fault, stator short winding fault, broken rotor bar fault and modeling of induction motor under disturbance.
Near-optimal operation of LNG liquefaction processes Near-optimal operation of LNG liquefaction processes Новинка

Near-optimal operation of LNG liquefaction processes

8790 руб.
This dissertation deals with the efficient operation of LNG liquefaction plants based on the concept of self-optimizing control. Self-optimizing control is known as a promising alternative to model-based online optimization techniques and gained more and more attention in the scientific and industrial community during the last decade. Among others, the the dynamic modeling of spiral-wound heat exchangers, the synthesis of self-optimizing control structures and the nonlinear steady-state and dynamical verification of self-optimizing control structures are discussed in this work.
Excited Jet and Its Applications Excited Jet and Its Applications Новинка

Excited Jet and Its Applications

4839 руб.
Excited jets are an excellent platform for the study of fluid dynamics and turbulence as they display numerous phenomena that are encountered throughout the field of fluid dynamics. Many researchers have worked on jet flow control to enhance mixing and/or reduce noise. The impetus for the present study was to throw some light on various types of excited jets used so far in engineering applications.
Design of Direct Torque Control of an Induction Motor in FPGA Design of Direct Torque Control of an Induction Motor in FPGA Новинка

Design of Direct Torque Control of an Induction Motor in FPGA

3549 руб.
Direct torque control or DTC is a very latest ac drive technology which can replace traditional PWM drives of open or closed loop control method. DTC describes the control of torque of a motor directly based on the electromagnetic state of the motor as similar to a dc drive. DTC allows the motor’s torque and stator flux to be used as the primary control variables which are obtained directly from the motor by using advanced motor theory. The major problems faced by Direct Torque control of an induction machine are the production of the high torque ripples present in the output of the induction motor. The torque ripple is caused by the use of the three level hysteresis comparator for torque comparison. This ripple can be reduced by using a special controller for torque comparison. By proper selection of the torque controller parameters the torque ripple can be reduced. The objective of the thesis is to model and simulate the direct torque control of the induction motor with this technique using MATLAB simulink package and show its feasibility by comparing it with the available DTC method. The models are developed from the various mathematical equations governing the system.
Modeling and Control of DFIG-based Variable Speed Wind Turbine Modeling and Control of DFIG-based Variable Speed Wind Turbine Новинка

Modeling and Control of DFIG-based Variable Speed Wind Turbine

4839 руб.
ABSTRACT The demand for electric energy is increasing day by day that has resulted in exploration of more and more alternate energy sources. Among the available alternate energy sources, wind energy, solar energy and fuel cells have drawn considerable attention. Further, all of these alternate energy sources are also of renewable nature. Among the mentioned alternate energy sources, wind power generation systems have been the most cost competitive alternative among all the environmentally clean and safe renewable energy sources in the world. Both fixed-speed squirrel-cage induction generator and variable speed double fed induction generator have been proposed in the literature for wind turbine generation technology. Since the direction and speed of winds may vary from location to location and time to time, the variable speed wind turbine technology offers inherent advantages over the fixed-speed one. The doubly fed induction-generator (DFIG) is used in tandem with the wind turbine to produce electric energy. The DFIG with the help of the two back to back converters: rotor side and grid side converters, is able to deal with wide variation of wind speed.
Coordinated Voltage Control in Multi-Microgrids Coordinated Voltage Control in Multi-Microgrids Новинка

Coordinated Voltage Control in Multi-Microgrids

7790 руб.
This book presents a set of proposals for advanced control functionalities in order to achieve a coordinated and optimized voltage management of distribution networks comprising several Distributed Generation units, controllable loads, storage devices and microgrids. Large scale integration of Distributed Energy Resources, namely Distributed Generation at the Medium Voltage level and microgeneration at the Low Voltage level, poses several technical challenges for distribution network operation, especially concerning voltage control. Accordingly, the development of specific control solutions is required in order to maximize the integration of these units in the distribution system. The work presented here focused on the development of a conceptual framework model for regional ancillary services markets for voltage control. In addition, a methodology for voltage and reactive power control to be integrated in a tool for managing network operation in the short-term time-horizon is proposed.
Quality Control of Technetium-99 Generator Quality Control of Technetium-99 Generator Новинка

Quality Control of Technetium-99 Generator

6690 руб.
Quality Control units should have well documented procedures for the implementation of Quality Control (QC), which should be undertaken for each starting material used in the production as well as for finished products. Quality Control (QC) measures of technetium-99m generator are necessary to ensure that it complies with all the requirements and specifications laid out for it. This book has been produced to meet the need expressed by nuclear medicine physicists and technologists for clear and detailed description of the quality control of technetium-99m generator. Giving attention to the quality control of radiopharmaceuticals in the nuclear departments will result in improving the diagnostic information, reducing the radiation doses to patients and staff, and reducing costs through effective use of radiopharmaceuticals.
Self-healing Control Technology for Distribution Networks Self-healing Control Technology for Distribution Networks Новинка

Self-healing Control Technology for Distribution Networks

11979 руб.
Systematically introduces self-healing control theory for distribution networks, rigorously supported by simulations and applications• A comprehensive introduction to self-healing control for distribution networks• Details the construction of self-healing control systems with simulations and applications• Provides key principles for new generation protective relay and network protection• Demonstrates how to monitor and manage system performance• Highlights practical implementation of self-healing control technologies, backed by rigorous research data and simulations
Reduced Switch Z-Source Inverter Fed Induction Motor Drive Reduced Switch Z-Source Inverter Fed Induction Motor Drive Новинка

Reduced Switch Z-Source Inverter Fed Induction Motor Drive

5790 руб.
This work focuses on the performance analysis of a reduced switch three phase Z-source inverter fed cost effective induction motor drive system. In the proposed approach, instead of a conventional six switch three phase inverter a four switch three phase Z-source inverter is utilized. This reduces the cost of the inverter, the switching losses, and the complexity of the control algorithms. The new Z-source inverter system provides ride-through capability during voltage sags, reduces line harmonics, improves power factor, reliability and extends output voltage range. Validations of the theory and reduction methods are performed experimentally. This proposed method is able to reduce conduction noise in contrast with the existing conventional inverters. Analysis, simulation and experimental results are presented to demonstrate these new features.
Implementation Of Control Circuit Of 1-PH SVC Using Microcontroller Implementation Of Control Circuit Of 1-PH SVC Using Microcontroller Новинка

Implementation Of Control Circuit Of 1-PH SVC Using Microcontroller

4839 руб.
This book devotes towards the physical realisation of prototype Design, Fabrication, Testing and control of prototype single phase Static Var Compensators (SVC).Prototype working model of single phase SVC being designed and fabricated in the laboratory. Single Machine Load Bus (SMLB) or Single Machine Single Bus (SMSB) Test system have been developed in the laboratory and tested without and with controller in open loop and closed loop modes (using microcontroller). A single machine single load system (SMSL) is setup in the laboratory with an Alternator feeding a single phase Induction motor. In the first case the impact of SVC on bus voltage with open loop mode of control is observed. Secondly an automatic control circuit is implemented using LPC 2148 Microcontroller. Test system is tested with automatic control circuit and results have been presented.
Microcontroller Based Embedded System for Induction Motor Protection Microcontroller Based Embedded System for Induction Motor Protection Новинка

Microcontroller Based Embedded System for Induction Motor Protection

3549 руб.
Induction motors are the workhorses of industry because of their roughness and versatility. The use of induction motors in industry is widespread and it can be exposed to different operational environments, manufacturing defects, etc. The present work emphases on the development of a low cost 8051 core microcontroller based system that will monitor the electrical parameter like input voltage, input current and power factor of the line. During any abnormality the developed system will act to ensure the protection of the motor with various fault mitigation algorithms.
Grid Integration of Wind Energy Conversion System Grid Integration of Wind Energy Conversion System Новинка

Grid Integration of Wind Energy Conversion System

3549 руб.
This book deals with the analysis, modeling and control system for permanent magnet synchronous generator based wind turbine connected to the grid. A wind energy conversion using DC-DC Buck- Boost Converter for permanent magnet synchronous generator based variable speed wind energy conversion system has been integrated with grid using five-level diode clamped multilevel inverter. In this work the instantaneous values of input side current and voltage of DC-DC buck-boost converter are utilized for implementing the PID controller.
How marketing stimuli unconsciously activate self-control How marketing stimuli unconsciously activate self-control Новинка

How marketing stimuli unconsciously activate self-control

4839 руб.
The author investigates whether buying impulsiveness, the situational context and gender have an effect on the automatic and unconscious activation of control goals such as "saving" (demonstrating the activation of self-control) via marketing stimuli such as the names of popular commercial chains. Thus, he extends the work of Fishbach, Friedman and Kruglanski (2003) and conveys their findings into the marketing context. Data comes from one hundred and one participants who completed several self-control related questionnaires and underwent a Lexical Decision Task. Men took significantly longer to identify control goals as correct words when being primed with marketing stimuli compared to when being primed with irrelevant primes. In women, however, exactly the opposite pattern emerged. Additionally, higher general self-control led to a faster recognition of control goals as correct words, replicating Fishbach et al.’s (2003) findings.
Steady state analysis of induction motor with state variable technique Steady state analysis of induction motor with state variable technique Новинка

Steady state analysis of induction motor with state variable technique

4839 руб.
The application of thyristor switching to induction motor speed control has resulted in a number of unconventional supply systems. One such technique, which has been successfully employed in a number of applications, is variable voltage control by means of symmetrically triggered thyristors in the stator phases of a wye-connected machine. In our project, an analytic method for predicting the steady-state performance of such a system is presented using the state variable technique. The use of symmetry of the solution permitted an additional reduction in the computation time. Since matrix techniques are utilized throughout the analysis, and the equations are implemented into a digital computer program. Hence, the method is well suited to the evaluation of proposed motor designs when used in conjunction with thyristor voltage control. The torque-speed characteristics of a typical drive system simulated using the MATLAB Simulink models are included and the results compared to an analytical solution formed. It is demonstrated that a computed solution will favorably predict the performance of an actual system.
Back-to-Back Power Electronic Converter Control for Active Damping Back-to-Back Power Electronic Converter Control for Active Damping Новинка

Back-to-Back Power Electronic Converter Control for Active Damping

4839 руб.
One of the most important aspects for large scale integration of wind power systems is the fault ride through (FRT) capability during voltage sags. What this means is that wind turbines should be continuously on-line and supply the grid during voltage sags. Large voltage sags induce high voltages in the rotor circuit of the DFIG and thus the rotor current rises and could exceed the current capability of the converter switches. In the instant of such faults, there is usually a power imbalance between the generator and the grid that usually cause the DC-link voltage rise because of the excess power generated that can not be transferred to the grid. Against the use of crowbar to block the converter and then to disconnect the generator from the grid or by reducing the power generated or maximizing the power supplied to the grid, an active damping criterion in the control of the BtB converter is proposed in this book. The phenomenal increase in these quantities together with other disturbances are by this process rejected and/ or damped thereby making the grid less sensitive to harmonics and oscillations. By this, the wind turbine stays on-line and continues to supply the grid.
Single and Split Phase Induction Motor Controller Single and Split Phase Induction Motor Controller Новинка

Single and Split Phase Induction Motor Controller

4839 руб.
This book is about single and split phase induction motor controller. The features controlled are switching, direction and speed of the motor through remote location (PC) and local location (keypad) while measuring and display the RPM of the motor on a MONITOR SCREEN and LCD. The industry mostly uses DC motor due to their easy control but they have their disadvantages of high maintenance cost and inability to work in corrosive or explosive environment. The control of an AC motor are usually complex and require complex algorithms to be implemented but AC motors are light, inexpensive and have lower maintenance cost. This project enables us to control and monitor many AC motors with a simple control circuit. The system consists of main blocks: Speed Sensors, Cycloconverters, On and Off control, Direction control, Microcontroller, PC programming, PC interface.
Design And Simulation Of A Novel Control Algorithm For DVR Design And Simulation Of A Novel Control Algorithm For DVR Новинка

Design And Simulation Of A Novel Control Algorithm For DVR

4839 руб.
Power quality is one of the major concerns in the present era. The problem of voltage sags and swells and its major impact on sensitive loads are well known. To solve this problem, custom power devices are used. One of those devices is the Dynamic Voltage Restorer (DVR), which is one of the most efficient and effective modern custom power devices used in power distribution networks. A new control algorithm for the DVR is proposed in this paper to regulate the load terminal voltage during sag, swell in the voltage at the point of common coupling (PCC). This new control algorithm is based on synchronous reference frame theory (SRF) along with PI controller is used for the generation of reference voltages for a dynamic voltage restorer (DVR). These voltages, when injected in series with a distribution feeder by a voltage source inverter (VSI) with PWM control, can regulate the voltage at the load terminals against any power quality problem in the source side. It first analyzes the power circuit of the system in order to come up with appropriate control limitations and control targets for the compensation voltage control through the DVR.

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DIY ZVS Tesla Coil Power Supply Boost Voltage Generator Drive Board Induction Heating Module Specification: Size: 74mm x 77mm Input voltage: DC 12V-30V Output: HVDC, About 800 times of input voltage Power requirements: Less than 12V 5A, above 15V 15A Operating frequency: 30kHz-50kHz adaptive Secondary parameters: 5T + 5T Feature: 1. Using military FR4-A material 1.6mm double-board circuit board, power line extra add tin and optimizes line width of MOS tube drive circuit. 2. Using two IRFP250N power field pipe, large current, small internal resistance, super-power. 3. Using 1.25 copper wire large inductance, more stable performance. 4. Using 1% precision metal film resistors. 5. Use 25 * 24 * 16mm thick anti-static cooling. 6. Using MKP 0.33UF 1200V two parallel resonant capacitor for high frequency. Precautions: 1. After finish the installltion, carefully check it and verify that all components soldered correctly 2. Please note that the positive and negative signs of input power, carefully check to prevent reverse burning plate 3. The test voltage is recommended for the low power 12v, prevent mis-wiring problems or cause burning plate 4. Drive board limit input is DC 30v, current 10A, not recommended using limits, do not long working under overvoltage and overcurrent conditions. Driver board is not suitable for induction heating, if you need induction heating, it is recommended input voltage 15v or less. For induction heating or long use high-power must need to add the cooling fan, if poor heat dissipation, it will result in MOS tube temperature is too high, will accelerate the aging of MOS tube even burn and other issues. Note: This is a DIY kit, you need to have electronic knowledge and ability. Package includes: 1 x ZVS Tesla Coil Power Supply Boost Voltage Generator
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