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How is the synchronous speed of an induction motor determined?
The following steps describe the operation of a three-phase induction motor. Arrange the correct steps in order (some steps do NOT belong — leave them out). Your answer should include only the letters of the steps in the correct order e.g. 'ABCD' or 'abcd'
a) The rotor immediately reaches synchronous speed and stays there.
b) The stator windings are reconnected after each start cycle.
c) The induced EMF causes currents to flow in the rotor bars since they form closed loops.
d) These rotor currents produce their own magnetic field.
e) The supply frequency decreases as the rotor speed increases. (Distractor)
f) A rotating magnetic field is produced in the stator windings when a three-phase supply is applied.
g) The rotor’s magnetic field interacts with the stator’s rotating magnetic field to produce torque, causing the rotor to turn.
h) Rotor conductors cut the rotating magnetic field, inducing an EMF in the rotor bars due to relative motion (slip).
What is synchronous speed in a three-phase induction motor?