Stepper motor
It is an electrical motor in
which rotor rotates through fixed angle in response to each input current
pulse.
State the different types of stepper motor.
Types of stepper motor
Variable reluctance (VR) stepper
motor
Permanent magnet (PM) stepper motor
Hybrid stepper motor
Explain the term : Step angle
Step angle
It is angle through the motor
shaft rotates for each input pulse.
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.
Define : Step rate
Step rate
It is defined as the number of
steps a shaft rotates in a given specified period.
State the meaning of slewing in the stepper motor.
Slewing
The stepper motor operation at
high speed is called as slewing.
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.
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.
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.
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.
Which type of stepper motor operation has greater holding
torque? Single phase ON or two phase ON
Two phases ON
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.
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.
State the function of the viscous damping.
Viscous damping
The function of the viscous
damping is to provide friction torque proportional to speed.
Whether any stalling problem in the stepper motor?
No
You may also like :
No comments:
Post a Comment