WORKING PRINCIPLE 3-PHASE ELECTRIC MOTORS

 

Figure 1.1 working principle 3-phase electric motors

Working Principle 3-phase Electric Motors - 3 phase AC motors work by utilizing the phase difference sources to generate turning force on the rotor. If the AC motor 1 phase to produce a phase difference required the addition of components Capacitors (read here), the motor 3 phase phase difference is obtained directly from the source as shown in Figure 3 phase currents following:

Figure 1.2

flow chart 3 phase electric motor

In the Figure 1.2, 3 phase currents have a phase difference of 60 degrees between phasenya. With this distinction, the additional capacitor is not required.

If the 3-phase voltage source is mounted on the stator coil, will arise with such speed rotary field following formula:

Ns = 120 f / P

Where:
Ns = Playback Speed
f = Frequency Source
P = Pole motors

The stator rotary field will be cut on the rotor conductor bars. As a result, the conductor bars of the rotor will arise GGL induction. Because the conductor rod is closed circuit then GGL will produce a current (I). The existence of the current (I) d natural magnetic field will cause the force (F) on the rotor. When the first coupling yan g generated by the force (F) on the rotor is large enough to carry the load coupling, the rotor will rotate in the direction of the rotary field stator. GGL induction arises because terpoton gn yes conductor bars (rotor) by the rotary field stator. It means that the induction GGL arise, it is necessary for the relative differences between the stator rotary field speed (ns) with a rotating speed of the rotor (nr).The speed difference between nr and ns-called slip (s), expressed by

S = (ns- nr) / ns

If nr = ns, GGL induction will not arise and the current does not flow in the conductor bars (rotor), thus resulting coupling. Judging from the way it works, the induction motor is also called asynchronous motors or asynchronous.

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