JULY 2012-NOTICE BOARD OF 3RD EEE,

useful links,

http://www.thehindu.com/classifieds/jobs/
http://www.way2college.com/how-to-select-an-engineering-branch-in-counseling.htm

JULY 2012-NOTICE BOARD OF 3RD EEE,

JULY 2012-NOTICE BOARD OF 3RD EEE,

JULY 2012-NOTICE BOARD OF 3RD EEE , SBIT,

Key GATE 2012

key is here

SUDOKU

THE HINDU- EDUCATION PLUS,

Engineering education or only degree?

http://www.thehindu.com/todays-paper/tp-features/tp-educationplus/article3700977.ece?css=print

THE HINDU- EDUCATION PLUS

 U.K. student visa: new rules introduced

http://www.thehindu.com/todays-paper/tp-features/tp-educationplus/article3701030.ece

THE HINDU- EDUCATION PLUS

Students develop prototype to help ryots

  http://www.thehindu.com/todays-paper/tp-features/tp-educationplus/article3700985.ece

THE HINDU- EDUCATION PLUS

Vizag teams off to IIT tech fest

Qualify preliminary round for ‘Escalade’, an all-India robotic competition for engineering

  http://www.thehindu.com/todays-paper/tp-features/tp-educationplus/article3700979.ece

THE HINDU

http://www.thehindu.com

You Are With Us....If You Do So

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Hi...Bloggers

Want to Post Interesting Topics In This            PRABALYA .....

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Just Send a Mail To:  prabalya.eee@gmail.com

Power survey of INDIA

click here

GATE 2012 Q paper

here is gate 2012 q paper
key will be posted later
click to download

useful links

http://www.pdfgeni.com/
http://robotics.youngester.com/2010/04/embedded-systems-in-robotics.html
http://worldwidescience.org/topicpages/d/detection+and+identification+system+applications.html
http://www.eg3.com/
http://shop.autoanything.com/electrical-components/20A54675A1.aspx?w4n=1

Shakuntala Devi puzzles

Interesting puzzles
click under to down load
Puzzles

interesting study material links.....

http://physics-animations.com/
http://mathworld.wolfram.com/
http://www.furryelephant.com/
http://www.tutorvista.com/content/science/science-ii/electricity/multiple-choice.php
http://science.howstuffworks.com/
http://www.mathworks.in/ 
http://www.acsu.buffalo.edu/~wie/applet/applet.old
http://www.falstad.com/mathphysics.html
www.filehippo.com/
 http://www.presentationpro.com/
http://www.otherpower.com/otherpower_systems.html
http://www.crazyengineers.com/
http://www.indiamart.com/siouxpower/power-system-study.html
 http://www.indiamart.com/siouxpower/power-system-study.html
http://www.ehow.com/info_8781032_iterative-methods-linear-nonlinear-equations.html

http://www.control.com/thread/1267218529

http://electrical-machine-design.blogspot.in/

http://www.scribd.com/doc/50442308/73/Elementary-Concepts

http://illuminations.nctm.org/ActivityDetail.aspx?ID=42

mini projects of 4th year students

electric circuit

here is a document that covers all the topics of electrical circuits.

click on the below link to download it

electrical circuit

Electronic circuits

download this pdf  for electrical circuits notes.

electronic circuits

and if you want lecture slides you can go through this link

electronic circuits

III EEE project updates-(change of project title by batch 3)

Blow-fuse indicator

Generally, when an  equipment indicates no power, the cause may be just a blown fuse. Here is a circuit that shows the condition of fuse through LEDs. This compact circuit is very useful and reliable. It uses very few components, which makes it inexpensive too. 

Under normal conditions (when fuse is alright), voltage drop in first arm is 2V + (2 x 0.7V) = 3.4V, whereas in second arm it is only 2V. So current flows through the second arm, i.e. through the green LED, causing it to glow; whereas the red LED remains off.

Fig.1 Blow- fuse indicator

When  the fuse blows off, the supply to green LED gets blocked, and because only one LED is in the circuit, the red LED glows. In case of power failure, both LEDs remain ‘off’.

This circuit can be easily modified to produce a siren in fuse-blown condition (see Fig. 2). An opto coupler is used to trigger the siren. When  the fuse blows, red LED glows. Simultaneously it switches ‘on’ the siren.

Fig.2 Blow- fuse indicator with alarm

In place of a bicolour LED, two LEDs of red and green colour can be used. Similarly, only one diode in place of D1 and D2 may be used. Two diodes are used to increase the voltage drop, since the two LEDs may produce different voltage drops.

Components  for alarm circuit:

1. Diode 1- IN4007

2. Piezo buzzer

3. IC MCT2E

4. Red, Green LEDS

5. Diode 2- IN4007

6. Resistor 100K

7. Bulb 25w

8. 12V DC

power electronic concept

  POWER ELECTRONICS IN SHIP PROPULSION ELECTRIC MOTORS.doc (Size: 732 KB / Downloads: 10)

INTRODUCTION :

The predominant type of prime movers for DP propulsion plant is Electric Drive .Practically every DP propulsion device installed in newly constructed vessels as well as in most of the conversions is driven by an electric motor. In recent years, variable speed AC Drives has become available and has been used in some applications for DP propulsion. The most commonly used motor drives are:
DC converters, or SCR for DC motors.
Cyclo converters for AC motors ,normally for Synchronous motors .
Current Source Inverters (CSI) for Ac motors (Synchronous Motors )
Voltage Source Inverters ,(VSI)for AC motors ,i.e. asynchronous ,synchronous and permanent magnet synchronous motors.


SCR CONTROLLED DC DRIVE AND FIXED PITCH PROPELLER

Ac controlled produced by Diesel generators at constant voltage (600 VDC max) and frequency.
A fixed pitch propeller is driven by the DC propulsion motors .Varying the propeller RPM and reversing the rotation of the propeller shaft allow the thrust to be controlled in magnitude and direction.

DISADVANTAGES:
The limitation of voltage (max voltages are 600V AC/750V DC) =>leads to heavy, expensive motors , cables runs .
Commutator wear =>higher maintenance requirements of the DC motors.
Practical limit for DC motor drives is 2-3 MW.
The power factor will vary from 0-0.92(α =15 degrees) – correspondent to 0-100% propeller rpm.

APPLICATIONS:
Introduction of the high current SCR in the late 1960s, the AC/DC electric propulsion drive has become quite popular.
Vessels with this type of propulsion include fishing trawlers and factory vessels, research vessels, ice breakers, off shore supply vessels, conventionally moored and dynamically positioned drill vessels, and semisubmersibles .

Reference: http://seminarprojects.com/Thread-power-electronics-in-ship-propulsion-electric-motors#ixzz1nPUtH3HQ