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Frequency and Speed of Electrical Motors

The speed of electrical motors with 2, 4, 6 or 8 poles at 50 Hz and 60 Hz

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The speed at which an electric induction motor operates depends on

  • the input power frequency, and
  • the number of electrical magnetic poles
Speed (rpm)
PolesFrequency (50 Hz)Frequency (60 Hz)
SynchronousFull LoadSynchronousFull Load
2 3000 2850 3600 3450
4 1500 1425 1800 1725
6 1000 950 1200 1150
8 750 700 900 850
  • Slip - in synchronous electrical induction motors
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  • en: electrical motor speed poles frequency
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