difference between synchronous motor and asynchronous motor

The difference between synchronous motor and asynchronous motor

Asynchronous motors are used only for motors, and are rarely used as generators. They are synchronous machines used to generate electricity.

The principle of asynchronous motor is to enter 3 intersecting currents in the stator, so that it produces a rotating magnetic field, and the rotational speed is N0, that is, the synchronous speed. Different magnetic pole logarithms P, under the same frequency f=50Hz alternating current, will produce different N0, n0=60f/p.

Working principle is as follows: symmetric 3 phase synchronous motor windings symmetrical 3 phase current to produce a rotating magnetic field, the magnetic field line cutting rotor windings, according to the principle of electromagnetic induction, the production of E and I in the rotor winding, rotor winding by electromagnetic force in a magnetic field, which produces electromagnetic torque, rotating the rotor, rotor the output mechanical energy, driven by mechanical load rotation. The rotor speed n moves, and the magnetic induction (or the change of magnetic flux) will produce electromagnetic induction (ampere force). With the addition of excitation, the rotor can be regarded as a magnet, with a fixed NS pole, which will rotate synchronously with the rotating magnetic field, so it is called a synchronous motor. (magnet attraction)

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