Magnetic Field Rotation Direction
In a three-phase AC system, the supply currents have a specific phase sequence (e.g., A, B, C). This sequence creates a resultant magnetic field that rotates in a particular direction.
Effect of Phase Sequence Reversal
Reversing the phase sequence of the supply currents means changing the order in which the phases reach their peak values (e.g., from A, B, C to A, C, B).
When this phase sequence is reversed, the direction of the rotating magnetic field produced by these currents is also reversed.
Therefore, if the phase sequence of supply currents is reversed, the direction of rotation of the resultant magnetic field wave is reversed.
Important Questions from Three Phase Induction Motor
The stator of a 3-phase induction motor has 4 slots per pole phase. If the supply frequency is 50 Hz, calculate the number of stator poles produced and the total number of slots on the stator, respectively.
In an induction motor for a value slip(s) = 0, the torque (T) is
The stator of a 3-phase induction motor has 2 slots per pole per phase. If supply frequency is 50 Hz, then calculate the number of stator poles and total number of slots on the stator.
If all the stator coils of a motor are connected for the same magnetic polarity, there will be formed an equal number of ________.
The shaft of an induction motor is made of
