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A hybrid stepping motor has eight poles which have been castellated to have six teeth each. If the rotor has 60 teeth, calculate the stepping angle.
1. 1.8°
2. 3°
3. 1.5°
4. 3.6°

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Correct Answer - Option 3 : 1.5°

Concept:

Step angle of the hybrid 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 = 60

N= 8 × 6 = 48

∴ stepping angle can be calculated as 

\(β = {{(60 -48)× 360°} \over (60× 48)}\)

β = 1.5°

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