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http://seminarsprojects.net/Thread-power-factor-correction--15240 ....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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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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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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automatic power factor correction by using 8051 microcontroller seminar reports

The thirst for new sources of energy is unquenchable, but we seldom realize that we are wasting a part of the electrical energy every day due to the lagging power factor in the inductive loads we use. Hence there is an urgent need to avoid this wastage of energy.

Before getting into the details of Power factor correction, lets just brush our knowledge about the term power factor . In simple words power factor basically states how far the energy provided has been ....etc

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More Info About Power Factor Correction Using Multiple Capacitor Banks

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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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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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