Question

The number of stator teeth in a variable reluctance stepper motor is 16. And, the number of rotor teeth is 8. Calculate the stepping angle of the motor
1. 90°
2. 45° 
3. 135°
4. 22.5° 

Answer 1

Correct Answer - Option 4 : 22.5° 

Concept:

Step angle of the variable reluctance stepper motor is given by

\(β = {{(N_s -N_r)× 360°} \over (N_s× N_r)}\)

Where Ns = Number of stator teeth

Nr = Number of rotor teeth

Calculation:

Given that, Nr = 8

Ns = 16

∴ The stepping angle can be calculated as 

\(β = {{(16 -8)× 360°} \over (16× 8)}\)

β = 22.5°