1
|
Give the reason behind the motor name as
stepper motor or step motor.
|
|
Stepper
motor
- It is an electrical
motor in which rotor rotates through fixed angle in response to each input
current pulse.
|
2
|
State the different types of stepper motor.
|
|
Types of stepper
motor
- Variable reluctance (
VR ) stepper motor
- Permanent magnet ( PM
) stepper motor
- Hybrid stepper motor
|
3
|
Explain the term : Step angle
|
|
Step
angle
- It is angle through
the motor shaft rotates for each input pulse.
|
4
|
Explain the term : Resolution
|
|
Resolution
- It is defined as the
number of steps needed to complete one revolution of the motor shaft.
- Higher the
resolution, greater the accuracy of the stepper motor.
|
5
|
Define : Step rate
|
|
Step
rate
- It is defined as the
number of steps a shaft rotates in a given specified period.
|
6
|
State the meaning of slewing in the stepper
motor.
|
|
Slewing
- The stepper motor
operation at high speed is called as slewing.
|
7
|
Explain the term : Torque gradient or
stiffness
|
|
Torque
gradient
- It is defined as the
ratio of change in holding torque for particular change in shaft position
when the stepper motor is in energized condition.
|
8
|
On which factors the Step angle of the
stepper motor depends?
|
|
The step angle of the
stepper motor depends upon stator and rotor poles and number of phases.
|
9
|
Explain the term : Full step operation ,
Half step operation
|
|
Full
step operation
- The operation of the
stepper motor with only one phase energized at a time, other two phase
remains in the non – energized condition.
Half
step operation
- The operation of the
stepper motor with only one phase energized at a time, other two phase
remains in the non – energized condition.
- The second time two
phase energized at a time while remaining one phase in the non – energized
condition.
- Therefore it is combination of one phase ON and two phase ON mode
operation.
|
10
|
Which type of stator and rotor does the
variable reluctance stepper motor consist of?
|
|
VR
stepper motor
- Stator : It has wound
stator salient poles.
- Rotor : It consists
of salient poles.
|
11
|
Which type of stepper motor operation has
greater holding torque? Single phase ON or two phase ON
|
|
Two phase ON
|
12
|
Explain the term : Micro – stepping
|
|
Micro
– stepping
- It is stepping mode
in which two phases simultaneously on but at the same time the currents in
the two phases deliberately made unequal.
|
13
|
State the micro stepping application of the
stepper motor.
|
|
The micro stepping
stepper motor provides low speed operation and high resolution. It is used in
printing application.
|
14
|
State the function of the viscous damping.
|
|
Viscous
damping
- The function of the
viscous damping is to provide friction torque proportional to speed.
|
15
|
Whether any stalling problem in the stepper
motor?
|
|
No
|
No comments:
Post a Comment