boost power factor preregulator control matlab simulink file

Introduction
In order to increase the switching frequency while maintaining acceptable efficiency, several soft switching techniques have been developed . Most of these resonant techniques increase the semiconductor current and/or voltage stress, leading to larger devices and ncreased
conduction losses due to greater circulating current. A new class of converters has been developed , however, that allow an increase in switching frequency without the associated increase in s ....etc

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Abstract
This work describes a novel method in improving the
input current total harmonic distortion (THD) as well as the power
factor of a three-phase suppressed-link rectifier-inverter circuit.
This proposed method makes use of only three bi-directional low
power static switches with a relatively simple gating circuit. This
paper illustrates how the proposed method is superior in reducing
the input current THD of a rectifier-inverter set to about 5%,
which is in line with the requirements of IEE standard 519 1992.
This is acc ....etc

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To get full information or details of automatic power factor correction using capacitive load banks please have a look on the pages

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K.D. Slack




ABSTRACT
The traditional approach to power factor correction in a facility is to add capacitors to individual loads such as motors and fluorescent lighting circuits, to add a capacitor bank with switching to a major distribution panel, or to add a capacitor bank with switching to the power input panel from the utility lines. Recently it has been shown that careful selection of high-efficiency motors for a facility can result in new motors with a significantly higher power factor than t ....etc

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WELCOME POWER FACTOR CORRECTION


Submitted By:
Rajat Kumar Barik
Electrical Branch


INTRODUCTION
1. Power factor is the percentage of electricity that is being used to do useful work
2. Power factor =Active power/Apparent power
3. Apparent power has two component:
(a) Active power
(b)Reactive power



DEFINATION
o ACTIVE POWER: Active power does all the work.
o UNIT : kw
o P= v I cos
o REACTIVE POWER: I t is the pseudo power(false) power which flows fro ....etc

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Abstract
This paper presents a simplified sinusoidal uninterruptible power supply (UPS) system. The proposed scheme includes features such as high power factor, low total harmonic distortion and good dynamic response at the ac output voltage. In addition, the scheme has the desirable characteristics of high efficiency, simple circuit and low cost compared with a traditional standalone multiple stages UPS with power factor correction. The paper also presents the circuit operation, the analysis and, experimental results of the proposed UPS sch ....etc

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Application Note 42047 Power Factor Correction (PFC) Basics


What is Power Factor?
Power factor (pf) is defined as the ratio of the real power (P)
to apparent power (S), or the cosine (for pure sine wave for
both current and voltage) that represents the phase angle
between the current and voltage waveforms (see Figure 1).
The power factor can vary between 0 and 1, and can be either
inductive (lagging, pointing up) or capacitive (leading, pointing
down). In order to reduce an ....etc

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eunice ....etc

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INTRODUCTION

Boost converter is one of the most popular choices for high-quality rectification. The converter is supplied from a full-wave rectified line voltage and operated so that the input current follows the input voltage. The input current shaping can be achieved using a number of techniques. When the converter is operated at fixed frequency and fixed duty ratio in the discontinuous conduction mode (DCM), the low- frequency component of the input current is approximately proportional to the input ....etc

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To get full information or details of automatic power factor correction using microcontroller please have a look on the pages

http://seminarsprojects.net/Thread-microcontroller-based-automatic-power-factor-controlling-system?pid=124495#pid124495

http://seminarsprojects.net/Thread-automation-in-power-factor-improvement-full-report

http://seminarsprojects.net/Thread-power-factor-correction?page=2

if you again feel trouble on automatic power factor correction using microcontroller please reply in that page and ask specific fields in automatic ....etc

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