Basic Principles and Functions of Electrical Machines




INTRODUCTION
The Direct Current (D.C.) machine, the synchronous machine, and the induction machine are the major electromechanical conversion devices in industry . The merits of the squirrel cage induction machine are: lightness, simplicity, ruggedness, robustness, less initial cost, higher torque-inertia ratio, capability of much higher speeds, ease of maintenance, etc . The most important fe ....etc

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basic electrical ,elecronics and computer


DEFINATION

THE CIRCUIT WHICH CONVERTS A.C VOLTAGE INTO D.C. VOLTAGE IS CALLED RACTIFIER
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I am civil engg form ABS Academy of polytechnic ....etc

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BASIC INSTRUMENTATION MEASURING DEVICES AND BASIC PID CONTROL


INTRODUCTION
Instrumentation is the art of measuring the value of some plant parameter,
pressure, flow, level or temperature to name a few and supplying a signal
that is proportional to the measured parameter. The output signals are
standard signal and can then be processed by other equipment to provide
indication, alarms or automatic control. There are a number of standard
signals; however, t ....etc

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PREPARED BY
ASHUTOSH MISHRA


BASIC CONCEPTS OF ROTATING ELECTRICAL MACHINES
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please give me the ppt of basic automobile engg. ....etc

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1.Zero voltage regulation in a transformer occurs at :
(A)zero p.f. lead 
(B)unity p.f.
(C )leading p.f.
(D)lagging p.f.

2.A parallel plate capacitor has 15 p.F capacitance. If the linear dimensions of the plate are doubled and the distance between the plates are also doubled, then new value of capacitance would be :
(A)15uF
(B)30 uF
(C )60 uF
(D)7.5 u.F

3.Resistance of a 230 V 100 W bulb is R1 and that of a 230 V 75 W is R2. Then,
(A)R1= R2
(B)R1 > R2
(C )R1 < R2
(D)R1 - 2R2

4.The current in a series ....etc

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ABSTRACT



Because of high requirements in power, efficiency, installation space and weight, the design of electrical machines for hybrid electrical vehicles is a particular challenge. This seminar describes a comparative study allowing the selection of the most appropriate electric-propulsion system for a parallel hybrid electric vehicle (HEV). This seminar is based on an exhaustive review of the state of the art and on an effective comparison of the performances of the four main electric propulsion systems, namely the d ....etc

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1. GSM Fixed Wireless Terminal and transferring GSM calls to electronic private automatic branch exchange system with call transfer and call pick up functions using AT89C52 microcontroller
2. Stepper Motor Control using PIC Microcontroller for robotic applications
3. Auto turn off for water pump with four different time slots using ARM 7 TDMI processor based LPC2148 Controller
4. Industrial Temperature Monitoring and controlling using ARM 7 TDMI processor based LPC2148 Controller
5. Space vector based synchronized PWM strategies at low swit ....etc

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