STEPPER MOTOR

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