Unique Rotating Magnetic Field In 3 Phase Induction Motor Diagram
Phasor diagram of three phase induction motor.
Rotating magnetic field in 3 phase induction motor diagram. Working principle of three phase induction motor the stator winding is overlapped at 120 electrically to each other. For a three phase supply this can be done by interchanging any two of the three lines. Twice of the maximum amplitude of an individual flux.
The stator of three phase induction motor is made up of numbers of slots to construct a 3 phase winding circuit which we connect with 3 phase ac source. The fundamental principle of operation of ac machines is the generation of a rotating magnetic field. 22 2014 2 2 inverter drive method figure 2 2 shows.
The image above shows 3 ac sine waves 120 out of phase with each other and the stator winding of a three phase motor. Rotating magnetic field in 3 phase induction motor mcqs with answers q1. When a three phase supply is given to the stator winding the rotating magnetic field rmf induced in the stator circuit.
V f control of three phase induction motor r01an2195ej0100 rev 1 00 page 3 of 6 aug. The energy is transferred magnetically from the stator winding to the short circuited rotor winding. A stationary observer on the machine s stator would see a sinusoidally varying flux distribution as shown in figure 3.
Equal to the maximum amplitude of an individual flux b. As we shall see the rotor in a 3 phase induction motor runs in the same direction as the rotating magnetic field. In a 3 phase induction motor the stator winding is connected to 3 phase supply and the rotor winding is short circuited.
2 pole implies that there are 2 poles per phase ac motors do not normally have actual pole pieces like this image but they will be utilized below to aid in comprehending how the rotating magnetic field is developed in a. The speed of the rotating magnetic field is known as synchronous speed ns. The magnetic field in three phase induction motor rmf rotates at a constant speed called synchronous speed ns which is given by n s 120f 1 p rpm where f 1 frequency of stator supply p number of poles of motor.