VIPSolutionsAn 8 - pole induction motor is connected to a 5 0 Hz supply. Calculate its synchronous speed.
Question:
An 8 - pole induction motor is connected to a 5 0 Hz supply. Calculate its synchronous speed.
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Asked by: jack
Created at: 2026-02-23 08:04:28
Asked by: jack
Created at: 2026-02-23 08:04:28
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# Synchronous Speed of an Induction Motor
The synchronous speed (\(N_s\)) of an induction motor is given by the formula:
\[
N_s = \frac{120 \times f}{P}
\]
where:
- \(f\) = Supply frequency (in Hz)
- \(P\) = Number of poles
---
## Given Data
- Number of poles (\(P\)) = 8
- Frequency (\(f\)) = 50 Hz
---
## Calculation
\[
N_s = \frac{120 \times 50}{8} = \frac{600}{8} = 750\ \text{rpm}
\]
---
## **Answer**
The synchronous speed of the 8-pole, 50 Hz induction motor is **750 rpm** (revolutions per minute).
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