note on stepped and stepless drives for exam for 20 marks
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Variable Voltage And Variable Frequency drives

Presented By:
P.NATARAJU S.E.V.S.RAGHU VARMA
3rd year E.E.E. 3rd year E.E.E.

Abstract:-
Our varying industrial needs demand more precise control of the outputs of our basic electrical prime movers i.e, THE MOTORS. Basically dc motors are easy to control compared to their ac counter parts, but they have their own limitations with increase in capacity. Conversely ac motors in particular squirrel cag ....etc

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Abstract Even though their capacities are still orders of mag- nitude lower than those of hard disks, flash storage sys- tems are rapidly gaining importance in energy-constrained systems. This paper focuses on USB flash drives, which can provide portable storage to mobile systems or stor- age to systems that otherwise do not have persistent stor- age opportunities (e.g., low-power sensor devices). The paper presents studies relating to power consumption, en- ergy overheads and benefits, and performance impacts of USB flash drives. The key insig ....etc

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CHAIN DRIVES IN LOW TORQUE DRIVES AND REDUCING PULSATIONS
INTRODUCTION TO DRIVES

Mechanical components used for power transmission.It may be belt, chain or gear depending on engine design parameters like - Distance between crankshaft and camshaft, engine maximum speed, engine-torque and engine construction cost.- Power transmission is done from one shaft to another shaft which may or may not rotate at same spe ....etc

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STEPLESS SPEED DRIVES &CONTINUOUSLY VARIABLE TRANSMISSION (CVT)
INTRODUCTION
A continuously variable transmission (CVT) is a transmission that can change steplessly through an infinite number of effective gear ratios between maximum and minimum values.
This contrasts with other mechanical transmissions that offer a fixed number of gear ratios.
The flexibility of a CVT allows the driving shaft to maintain a constant angular velocity over a range of output velocities.
ADVANTAGES
This can provide better ef ....etc

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recent trends in electric drives and traction ppt pls
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difference between chopper fed drives and converter fed drives pdf ....etc

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ADAPTIVE CONTROLLER FOR DC MOTOR DRIVES: A HARDWARE AND SOFTWARE APPROACH

F I Ahmed, A M El-Tobshy, A A Mahfouz, and M M Ibrahim
Faculty of Engineering, University of Cairo, Egypt



Abstract:

The most commonly used controller for the speed control of dc motor drives is (P-I) controller. In spite of the major features of the (P-I) controller, it has some disadvantages such as: the high starting overshoot in speed, the sensitivity to controller gains and the sluggish response due to sudden change ....etc

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I need it for my assignment we have got . General topic is drives
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electrical drives & control question paper ....etc

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