WorksheetsSTEPPER MOTOR
Total questions: 15
Worksheet time: 7mins
How does a Stepper Motor move ?
A. Electrical Pulse
B. Continuous Applied Voltage
C. Alternates from A and B
A pulse can be produce by which means ?
A. Microprocessor
B. Timing Logic
C. Toggle Switch
D. All of the above
Which of the following is not a type of stepper motor?
A. Variable Reluctance
B. Hybrid
C. Magnetic
D. Lead-Screw
Which of the following is not a component of a stepper motor?
A. Windings
B. Rotor and Stator
C. Commutator
D. Brush
E. Both C and D
What is the difference between full-step and half-step?
A. In full-step two phases are on and in half-step only one phase is on.
B. More resonance is evident in half-step
C. More power required for full-step
D. Half-step offers better resolution
Which of the following is NOT an advantage of stepper motors?
A. Cost-efficient
B. Maintenance-free
C. No feedback
D. More complex circuitry
With a stator having 8 teeth and a rotor having 6 teeth, what step angle will an application be able to achieve?
A. 15°
B. 51°
C. 20°
D. 105°
A variable reluctance stepper motor is constructed of .................. material with salient poles.
(a) paramagnetic
(b) ferromagnetic
(c) diamagnetic
(d) non-magnetic
In a three-stack 12/8-pole VR motor, the rotor pole pitch is
(a) 15º
(b) 30º
(c) 45º
(d) 60º
A stepper motor having a resolution of 300 steps/rev and running at 2400 rpm has a pulse rate of— pps.
(a) 4000
(b) 8000
(c) 6000
(d) 10,000
If a hybrid stepper motor has a rotor pitch of 36º and a step angle of 9º, the number of its phases must be
(a)4
(b)2
(c)3
(d)6
A stepping motor is a .................. device.
(a) mechanical
(b) electrical
(c) analogue
d) incremental
The rotational speed of a given stepper motor is determined solely by the
(a) shaft load
(b) step pulse frequency
(c) polarity of stator current
(d) magnitude of stator current.
Which of the following phase switching sequence represents half-step operation of a VR stepper motor ?
(a) A, B, C, A .......................
(b) A, C, B, A .......................
(c) AB, BC, CA, AB .......................
(d) A, AB, B, BC .......................
What is the step angle of a permanent-magnet stepper motor having 8 stator poles and 4 rotor poles ?
(a) 60º
(b) 45º
(c) 30º
(d) 15º
