Saturday 24 August 2013

Improved Trans-Z-Source Inverter With Continuous Input Current and Boost Inversion Capability

Abstract—This paper deals with a new family of high boost voltage inverters that improve upon the conventional trans-Z-source and trans-quasi-Z-source inverters. The improved trans-Z-source inverter provides continuous input current and a higher boost voltage  inversion capability. In addition, the improved inverter can suppress resonant current at startup, which might destroy the device. In comparison to the conventional trans-Z-source/-trans-quasi-Zsource inverters, for the same transformer turn ratio and input and output voltages, the improved inverter has a higher modulation index with reduced voltage stress on the dc link, lower current stress flow on the transformer windings and diode, and lower input current ripple. In order to produce the same input and output voltage with the same modulation index, the improved inverter uses a lower transformer turn ratio compared to the conventional inverters. Thus, the size and weight of the transformer in the improved inverter can be reduced. This paper presents the operating principles, analysis and simulation results, and compares them with those of the conventional trans-Z-source/-quasi-Z-source inverters. To verify the performance of the improved converter, a laboratory prototype was constructed based on a TMS320F2812 digital signal processor with 100 Vdc input and 115 Vrms output voltage.


(Index Terms—Boost inversion ability, shoot-through state, trans-Z-source inverter, transformer, Z-source inverter.)

Improved Sensorless Operation of a CSI-Based Induction Motor Drive: Long Feeder Case

Abstract—Various applications, like in underground mines and oil and gas industries, require remote operation of vectorcontrolled medium-voltage variable speed drives via a long motor feeder. The use of voltage source inverters in such cases leads to motor overvoltage and harmonic quality problems. The current source inverter (CSI) is ideally matched to these applications because of its motor-friendly voltage output. Speed sensorless operation is mandatory due to the longmotor feeder. Although the model reference adaptive system (MRAS) is a powerful and proven speed estimation tool, its implementation in long motor feeder drives faces many challenges. Among them, and addressed in this paper, are inherent dc offset in its stator model, the need for actual motor voltage and current values, and oscillations in the estimated speed due to errors in the motor current measurement signals. In this paper, a sensorless CSI vector-controlled drive, suitable for long motor feeder applications, is studied. Improved speed estimation is achieved by proposing 1) a modified dc-offset eliminator for an MRAS speed estimation and 2) a compensation technique for motor current’s measurement errors. Intensive experimental results, for a low-voltage scaled model, along with simulations validate the effectiveness of the proposed technique.


(Index Terms—Current source inverter, long feeder, medium voltage drives, speed sensor-less.)

Hybrid-Frequency Modulation for PWM Integrated Resonant Converters

Abstract—This paper presents a unique modulation method for extending the input range of pulse-width modulation (PWM)- integrated resonant converters, such as the isolated boost resonant converter, while maintaining high conversion efficiency. The technique includes primarily the hybridizing of constant-on, constantoff, and fixed-frequency control depending only on the required duty cycle. The modulation scheme reduces core loss and conduction loss dramatically by decreasing the applied volt-seconds at the transformer and improving the switching period utilization. With hybrid-frequency control, the circuit alsomaintains zero current switching for the output diodes, minimizes switching loss, and eliminates circulating energy at the transformer across the entire operating range. It also allows for a predictable voltage gain, dependent only on duty cycle and transformer turns ratio. A detailed loss analysis is provided and verified against a 180 W experimental prototype, with an input range of 12–48 V and a switching frequency range of 30–70 kHz. Implementation issues are also handled with a variety of solutions for realizing the modulation scheme. Experimental results show greater than 4% weighted efficiency improvement in the prototype using the proposed method.


(Index Terms—DC–DC modulation, integrated boost resonant (IBR) converter)

High-Efficiency Single-Input Multiple-Output DC–DC Converter

Abstract—The aim of this study is to develop a high-efficiency single-input multiple-output (SIMO) dc–dc converter. The proposed converter can boost the voltage of a low-voltage input power source to a controllable high-voltage dc bus and middle-voltage output terminals. The high-voltage dc bus can take as the main power for a high-voltage dc load or the front terminal of a dc–ac inverter. Moreover, middle-voltage output terminals can supply powers for individual middle-voltage dc loads or for charging auxiliary power sources (e.g., battery modules). In this study, a coupled-inductorbased dc–dc converter scheme utilizes only one power switch with the properties of voltage clamping and soft switching, and the corresponding device specifications are adequately designed. As a result, the objectives of high-efficiency power conversion, high stepup ratio, and various output voltages with different levels can be obtained. Some experimental results via a kilowatt-level prototype are given to verify the effectiveness of the proposed SIMO dc–dc converter in practical applications.


(Index Terms—Coupled inductor, high-efficiency power conversion, single-input multiple-output (SIMO) converter, soft switching, voltage clamping.)

High-Efficiency Asymmetrical Half-Bridge Converter Without Electrolytic Capacitor for Low-Output-Voltage AC–DC LED Drivers

Abstract—Due to their high reliability and luminous efficacy, high-brightness light-emitting diodes are being widely used in lighting applications, and therefore, their power supplies are required to have also high reliability and efficiency. A very common approach for achieving this in ac–dc applications is using a two-stage topology. The power factor corrector boost converter operating in the boundary conduction mode is a very common converter used as first stage. It is normally designed without electrolytic capacitors, improving reliability but also increasing the low-frequency ripple of the output voltage. The asymmetrical half-bridge (AHB) is a perfect option for the second stage as it has very high efficiency, it operates at constant switching frequency, and its output filter is small (i.e., it can be also easily implemented without electrolytic capacitors). Moreover, the AHB is an excellent candidate for selfdriven synchronous rectification (SD-SR) as its transformer does not have dead times. However, the standard configuration of the SD-SR must bemodified in this case in order to deal with the transformer voltage variations due to the input voltage ripple and, more important, due to the LED dimming state. This modification is presented in this paper. Another important issue regarding the AHB is that its closed-loop controller cannot be very fast and it cannot easily cancel the previously mentioned low-frequency ripple. In this paper, a feed-forward technique, specifically designed to overcome this problem, is also presented. The experimental results obtained with a 60-W topology show that efficiency of the AHB may be very high (94.5%), while the inherent control problems related to the AHB can be overcome by the proposed feed-forward technique.


(Index Terms—AC–DC converter, asymmetrical half bridge, dc– dc converter, LED drivers, low-output voltage, self-driven synchronous rectification (SD-SR).)

Thursday 22 August 2013

web based embedded system project

ECE WEB BASED PROJECT TITLE
IEEE ECE PROJECTS TRICHY,CHENNAI,TAMILNADU,INDIA


CONTACT US: trichynewproject@gmail.com

M.S.ABINESAN: +919003012154
01              
A CAN Bus based system for monitoring and fault diagnosis in Wind Turbine
2013
02              
Intelligent Fish Disease Diagnostic System Based on SMS Platform
2013
03              
Location-Aware and Safer Cards: Enhancing RFID Security and Privacy via Location Sensing
2013
04              
A Wireless Sensor Network for Greenhouse Climate Control
2013
05              
Towards the Implementation of LOT for Environmental Condition Monitoring in Homes
2013
06              
Power-Aware Cloud Metering
2013
07              
Design and Implementation of a Web-Service-Based Public-
Oriented Personalized Health Care Platform
2013
08              
A Protocol Stack Design And Implementation Of Wireless Sensor Network For Emerging Application
2013
IEEE ECE PROJECTS TRICHY,CHENNAI,TAMILNADU,INDIA


CONTACT US: trichynewproject@gmail.com

M.S.ABINESAN: +919003012154

consumer electronics project

CONSUMER ELECTRONICS
IEEE ECE PROJECTS TRICHY,CHENNAI,TAMILNADU,INDIA


CONTACT US: trichynewproject@gmail.com

M.S.ABINESAN: +919003012154
1.       
An Interactive RFID-based Bracelet for Airport Luggage Tracking System
2013
2.       
Prototype of an Underground Multi-Storied Automated Car Parking System
2013
3.       
High detection performance of non dispersive infrared CO2sensor using stair-tapered reflector
2013
4.       
Hybrid RFID System-based Pedestrian Localization: A Case Study
2013
5.       
Intelligent Technologies for Self-Sustaining, RFID-Based Rural E-Health Systems
2013
6.       
Prototype of a fingerprint based licensing system For driving
2013
7.       
Automated Retail Store Based on RFID
2013
8.       
Intelligent Parking System for Car Parking Guidance and Damage Notification
2013
9.       
An Open Traffic Light Control Model For Reducing Vehicles CO2 Emission Based On ETC Vehicles.
2012
10.   
Design of Blood Pressure Measurement System for the aged
2012
IEEE ECE PROJECTS TRICHY,CHENNAI,TAMILNADU,INDIA


CONTACT US: trichynewproject@gmail.com

M.S.ABINESAN: +919003012154

gsm and gps based project

GSM AND GPS
IEEE ECE PROJECTS TRICHY,TAMILNADU,INDIA


CONTACT US: trichynewproject@gmail.com

M.S.ABINESAN: +919003012154
1.       
Hajj Crowd Management and Navigation System
2013
2.       
ARM Hardware Platform for Vehicular Monitoring and Tracking
2013
3.       
An Icing On-Line Monitoring System of Transmission Lines
based on WSN
2013
4.       
GSM Based Automatic Energy Meter Reading System with Instant Billing
2013
5.       
A New Type of Automatic Alarming Device to Rescue Accident Injured in Time
2013
6.       
Energy management in an automated Solar powered irrigation system
2013
7.       
A Novel Approach to Implement Green Wave system and Detection of Stolen Vehicles
2013
8.       
W ireless Sensor Network For Multi-Storey Building: Design and Implementation
2013
9.       
Certificate less Remote Anonymous Authentication Schemes for Wireless Body Area Networks
2013
10.   
Automated Control System for Air Pollution Detection in
Vehicles
2013
11.   
Energy management in an automated Solar powered irrigation system
2013
12.   
Online Monitoring of Geological CO2 Storage and Leakage Based on Wireless Sensor Networks
2013
13.   
Multi Sensor Railway Track Geometry Surviving System.
2012
14.   
Automatic Measurement and Reporting System of Water Quality Based on GSM  
2012
15.   
Automatic Ambulance Rescue System.
2012
IEEE ECE PROJECTS TRICHY,TAMILNADU,INDIA


CONTACT US: trichynewproject@gmail.com

M.S.ABINESAN: +919003012154