Showing posts with label TECHNICAL PROJECTS. Show all posts
Showing posts with label TECHNICAL PROJECTS. Show all posts
Saturday, February 16, 2013
Sunday, December 2, 2012
DRDO Interview Questions for Electrical Engineers
Ramana my Friend's DRDO interview Questions:
Chairman:
1. What are the various experiments you have done in your machines lab
2. How the vibrations are produced from mobile phone when it is in that mode
Departmental Expert-1:
1. Why your eyes are in red colour, don't you have enough sleep yesterday night
2. what is your favorite subject
3. What is meant by zpf... this term is related to which machine
4. What is meant by reluctance motor
5. write the expression for power developed in salient pole synchronous motor?
6. what is meant by load angle in detail
7. Can you explain hunting breafly..?
8. Is there any method to reduce hunting...?
I think you studied power system analysis in your B.Tech....not power systems, power system analysis
9. what are the various quantities required for design of power system
10. Can you tell me the method for power system stability analysis
He gives clue for above question
11. Explain equal area criterion analysis method
Departmental expert-2:
1. this question related to communication subject
2. what is meant by stepper motor
3. how the steps can achieve
4. what is meant by BLDC motor
5. what is the constructional and operational difference between BLDC motor and DC motor
6. without the brushes and commutator how can you achieve the current reversal?
for the above question Departmental Expert-1 gives 50% answer as clue...
7. what is the purposes of commutator in DC machines
8. In diesel engine trains how the exact system is there inside
9. How can we get the supply for fans and lights in trains
10. Name the special generator used for above...?
for this question departmental expert-1 gives full answer
External expert:
1. instead of using AC transmission why we are using HVDC
2. What is the main adv. and dis adv. of HVDC
3. can you learn about the earth fault circuit breaker in houses
4. what is meant by MCB? how it works? which type of CB it is?
Departmental expert-1:
1. apart from the losses, cost etc etc..... the advantage of HVDC over any other....
..................................@@@000@@@...............................
Lastly the departmental expert-1 asks Well Mr. Ramana suppose if you are selected in this job, afterwards you got
other job based on B.Tech (example in ISRO that is also a R&d org.)then what do you do....
K@run@
Thursday, July 5, 2012
Saturday, March 10, 2012
Thursday, March 1, 2012
Wednesday, November 30, 2011
Nuclear weapons
Nuclear weapons | |||||||||||||||||||
A few words about nuclear weapons technology.. |
K@run@
Saturday, November 26, 2011
Mobile Charger Working
When charger is connected with the AC supply, the LED starts glowing to indicate the proper operation of the charger.
Working
Latest mobile chargers are kind of power supply units that use the Switched Mode Power Supply (SMPS) technology. To understand the working phenomenon of a mobile charger, we need to understand the concept of Power Supply Unit (PSU). PSU is a device that transfers electrical energy from one end to another by changing its fundamental characteristics according to the requirements. Example of a PSU is an application that converts AC mains voltage to regulated DC voltage. PSUs can be of two types depending on the mode of operation – Linier and Switching.
In these switching mode chargers, energy transfer is done by continuously switching electrical components (inductor, capacitor, etc) on and off. We can control the output voltage/current by varying the duty cycle, frequency or the corresponding phase. Using the SMPS technology makes the chargers smaller and lighter by elimination of low frequency transformers. It also presents a greater efficiency than the conventional methods which uses bulky transformers.
The AC supply first enters through the line filters in the charger. Line filters are the kind of electronic filters that are placed between an electronic device and an external line to alter/attenuate the electromagnetic interference effect. Now filtered signal are made to pass through the full wave bridge rectifier circuit. Rectifier converts the AC voltage to DC.
Output DC voltage from rectifier circuit passes through the PFC (Power Factor Correction) circuit which operates power circuits at their maximum efficiency. Further the voltage signal is transferred to the pulse transformer that is a special type of transformer optimized to produce rectangular electrical pulses.
Pulse transformers are categorized into two categories – power and signal transformers. The one used here is a power transformer. It reduces the voltage level of the input power and gives a low voltage power that is exactly required to charge the battery.
K@run@
Wednesday, November 23, 2011
Capturing Electricity With a Shoe
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Humans are not very efficient. When we walk, we waste close to 20 watts of energy per second. Instead of turning all calories into lift or forward motion, we turn most of them into heat that’s quickly dissipated. So my colleagues and I came up with a way to harvest the wasted energy from human motion and convert it into about 10 watts of electricity.
Our device is based on a physical phenomenon called electrowetting: If you apply electrical voltage to certain liquids, the liquid moves. This means you have converted electrical energy (the current) to mechanical energy (the liquid in motion). We reversed the process, forcing liquid to move over electrodes. In the shoe, you have two flexible plastic bladders, one under the heel and the other under the toe. The bladders are filled with a mixture of oil and water and connected by a thin, snaking tube. When you step down on your heel, you compress the rear bladder, and several milliliters of liquid travel through the tube to the front bladder. Step on the toe, and the process is reversed.
The tube is lined with a thin film of electrodes, and as the liquid slides back and forth, the electrodes charge—electrowetting in reverse. A small battery stores the energy, and you can access that energy by way of a micro-USB port on the heel of the shoe. We also invented a way, like Wi-Fi, to transfer power from shoe to cellphone battery. Military or police might like having a regular supply of power, but I suspect most people wouldn’t be happy dealing with wires connected to their footwear.
K@run@
Monday, November 14, 2011
Sunday, November 13, 2011
Friday, November 4, 2011
Wednesday, October 26, 2011
Projects for EEE,ECE,EIE
Sooxma Technologies is a leading organization providing excellent training in Projects and the latest innovative technologies. Sooxma Technologies works towards making the students understand the abstruse process of completing a project. Project Development has a sharp learning curve and the Professional acumen at Sooxma Technologies understands the intricacies of this learning curve. We teach students the technologies and make them do the project so that they can learn maximum and build a project having a good market value. Our expertises are present round the clock to cater to the needs of the students. Our excellent record for the 5 years is a manifestation of the quality of knowledge we impart to the students. We guide College Students in developing academic projects with next generation technologies. Currently we are focusing on Embedded/Microcontroller, Matlab, VLSI, DSP, DIP and Software based Student Projects. We Provide Latest Embedded Live Projects for Pre-Final and Final year BE/B.Tech, ME/M.Tech, MBA, BSc/MSc Electronics and Polytechnic/Diploma Students. Specially designed and developed projects as per student’s requirements. We prepare students for Project presentations. We assist Students in developing Complete Project Documentation.
K@run@
K@run@
Saturday, February 26, 2011
Project in IIT's
Wow Indian institute of technology has given a great opportunity to all the top 10 rankers of their respective programs of every college in India. fellowship is also an added advantage. All we have to take care is period of project and guidance from a lecturer in IIT.
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