Synchronous Speeds
Synchronous speeds for synchronous motors and alternators depend on the number of poles on the machine and the frequency of the supply.
The relationship between the supply frequency, f, the number of poles, p, and the synchronous speed (speed of rotating field), ns is given by:
- .
In the following table, frequencies are shown in hertz (Hz) and rotational speeds in revolutions per minute (rpm):
| No. of poles | Speed (rpm) at 50 Hz | Speed (rpm) at 60 Hz |
|---|---|---|
| 2 | 3,000 | 3,600 |
| 4 | 1,500 | 1,800 |
| 6 | 1,000 | 1,200 |
| 8 | 750 | 900 |
| 10 | 600 | 720 |
| 12 | 500 | 600 |
Read more about this topic: Alternator Synchronization
Famous quotes containing the word speeds:
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