Question:
A shaft encoder attached to a DC motor has a sensitivity of 500 pulses per revolution. A frequency meter connected to the encoder output indicates 5500 Hz. The speed of the motor in rpm is:
A shaft encoder attached to a DC motor has a sensitivity of 500 pulses per revolution. A frequency meter connected to the encoder output indicates 5500 Hz. The speed of the motor in rpm is:
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Motor rpm = \( \dfrac{\text{frequency}}{\text{pulses/rev}} \times 60 \)
Updated On: May 26, 2025
- 110
- 220
- 550
- 660
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The Correct Option is D
Solution and Explanation
Given:
\[
\text{Frequency} = 5500\ \text{Hz},\quad \text{Pulses/rev} = 500
\]
Then:
\[
\text{Revolutions/sec} = \dfrac{5500}{500} = 11 \Rightarrow \text{rpm} = 11 \times 60 = 660
\]
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