Why don't AC motors use commutators?
The principle of AC motor of DC motor is differentDC motor running by permanent magnet and coil production function to promote Miguel rotor, reversing to coil rotor 180 degrees (equivalent to the magnetic field direction 180 degrees) to maintain the current direction of the coil and the existing magnetic field to produce the correct momentAlternating current machines operate with rotating magnetic fields, rotating magnetic fields depend on the direction of the current, and alternating current has this property, so there is no need for commutatorHowever, this is not absolute, the DC motor can also use no commutator, AC can also use the commutator, and fixed rotor design relatedThe AC motor is used for excitation, that is, the magnetic field is provided to allow the coil to cut the magnetic field lines
The principle of reading a book, the commutator is used to make the motor current is DC, and if you say that the generator has a commutator, is not ac?
Because the direct current motor changes the current direction through the commutator, the coil continues to rotateThe alternating current is always changing direction, there is no need to use the commutatorThe difference between an engine and an electric motor is that there is no power supply on the engine connected to the motor, and the motor is connected to the power supply, but it may not have no other electrical appliance
