i want powerpoints and pdfs on bridgeless boost rectifiers .....also i need some project reports ....etc

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INTRODUCTION
Efficient control of D.C motor speed is very economical to any industries for that reason we are using full wave rectifier in which we are using triacs as switches because of bi-directional nature of triacs we are preferred instead of using thyrister as a switches. To obtain a four quadrant operation we need 8 switches if we use thyristers (this circuit called dual converter) and if we use triacs we need 4 switches only.
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3-Phase Power Factor Correction, Using Vienna Rectifier Approach and Modular Construction for Improved Overall Performance, Efficiency and Reliability
1.0 Abstract:
While applications for 1-Phase PFC are now familiar and prevalent, the same is not the
case with 3-Phase PFC. Many equipments using kilowatts of power from 3-Phase mains
should be candidates of 3-Phase power factor correction, because several advantages
ensue, both to the user of the equipment and to the utility. The Vienna Rectifier approach
to achieve 3-Phase ....etc

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Introduction to Pulse Width Modulation (PWM)
In this technique several pulses are produced in each half – cycle but the width of the pulses
is not the same as in case of multiple – pulse width modulation, however the width of each pulse is
varied in accordance with the amplitude of the sine wave reference voltage. The width of the pulse
at the center of the half – cycle is maximum and decreases on either side. The figure 6(a) shows the
generation of the output signal by comparing a sinusoidal reference sign ....etc

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silicon control rectifier -scr

Content

Introduction
What is SCR ?
Characteristic of SCR
Two transistor analog connection
Series connection of SCR
Parallel connection of SCR
Advantages
Disadvantages
Conclusion

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hi this is niranjani
im doing project in vienna rectifier..this is M.tech project ..can u please help me getting the PTT for three phase vienna rectifier ....etc

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Sir/Madam
Can i get the information regarding the above mentioned project topic. ....etc

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1. Current injection in a controlled rectifier under unbalanced supply and variable line and load inductances
2. The Single-Phase Single-Switch PWM Three-Level High Power Factor Rectifier for DC Network Application
3. Design and performance of a transformer less shunt hybrid filter integrated into a three-phase diode rectifier-paper not searching
4. A Bridgeless PFC Boost Rectifier With Optimized Magnetic Utilization
5. Design of High Power Density DC Bus Converter Based on LLC Resonant Converter with Synchronous Rectifier
6. Constant freq ....etc

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Abstract
An active current injection network for a three-phaserectifier is proposed. The proposed circuit uses three bidirectionalswitches operating at low frequency and a half-bridge inverteroperating at high frequency. It also uses an inductor in orderto make the current modulation. Because only 3.7% of the totalpower delivered to the load is processed by the injection network,the proposed converter offers high efficiency, and not only a highpower factor is obtained but also the total harmonic distortion isreduced. Operation, analysi ....etc

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ppt for bridgeless ac to dc cuk rectifier for pfc ....etc

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