EE6703 Special Electrical Machines Question Bank
EE6703 Special Electrical Machines Question Bank Regulation 2013 Anna University free download. Special Electrical Machines EE6703 Question Bank free pdf download.
Sample EE6703 Special Electrical Machines Question Bank:
1. What is stepper motor?
A stepper motor is a digital actuator whose input is in the form of programmed
energization of the stator windings and whose output is in the form of discrete angular rotation. (ee6703 special electrical machines question bank)
2. Define step angle.
Step angle is definrd as the angle through which the motor rotates for each command pulse.it is denoted as β.
3. Define slewing
The stepper motor operates at very high speed is called slew angle.i,e (25000 steps per sec).
4. Define resolution
It is defined as the no.of steps needed to complete one revolution of the shaft.
Resolution = no . of steps /revolution (ee6703 special electrical machines question bank)
5. Mention some applications of stepper motor
I.floppy disc drives
ii. qurtz watch
iii. camera shutter operation
iv. dot matrix and line printers
v. small tool application
6. What are the advantages and disadvantages of stepper motor?
1. it can be driven in open loop without feedback
2. it is mechanically simple
3. it requires little or no maintenance.
2.fixed step angle
3.limited power output (ee6703 special electrical machines question bank)
7. Define holding torque.
Holding torque is the maximum load torque which the energized stepper motor can withstand without slipping from equilibrium position
8. Define detent torque
Detent torque is the maximum torque which the unenergised stepper motor can
withstand without slipping.it is also known as cogging torque.
9. What is meant by full step operation?
Full step operation or single phase on mode is the one in which at a time only one phase winding is energized, due to which one stator winding is energized and causes the rotor to rotate some angle.
(ee6703 special electrical machines question bank)
|Subject Name||Special Electrical Machines|
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