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Well AC, or Alternating Current motors are more efficient than DC or direct current. Both motors work by basically positive and negative current chasing itself in a circle which never catches up to itself so the motors turn. In AC, polyphase or three phase motors this becomes more efficient because you need lower current to do the same thing a DC motor does which requires more voltage to push it. But in a basic sense DC motors are good because you can control the speed of them better than AC. You will find DC motors on things like rock crushers, car crushers etc. where there is a slow but constant speed needed despite the load. A DC motor may turn a conveyor belt at2 rpm's but when you add rock or a crushing apparatus you will still get that2 rpm despite the load. A lot of your home appliances ironically run on DC motors too. Now overload it then you will have problems but that is it's basic uses today. AC motors you will find in factories because they have a faster startup speed and when you use the three phase motors they are just more efficient. There is a type called a squirrel cage and then you can imagine the squirrel in the cage moving the rotor that chases the cage or the stator but never really goes end over end when doing so. That is the same principle of magnetism and voltage chasing current inside a DC or an AC motor but each are suited for uses where one or the other may not be as good given the circumstance or the operation you want to control.
AC motors better than DC motors because the engines of DC electric exchanger need to reverse the trend, while AC motors do not contain most of the switches, because the power generated in the rotor is generated inductively.
An AC motor uses the constantly changing waveform, and respectively magnetic field, to induce the armature of the motor to move, usually by inducing a counter field in the armature, which the stator field pushes against. A DC motor would just sit there, so needs commuated to reverse. The easy way is to have the coil on the armature, and it commutated with brushes on a sectional commutator. The stator is a permanent magnet, or another set of coils fed by DC current, which in effect is equal to a permanent magnet. Not urprisingly, the physics of a motor with both a wound stator and commutated armature works on AC just as fine as on DC.
This depend on the application
In some application dc motor is better because it is low price and easy to control
AC Motors Are better. 1- AC power is easier to have.
2- DC is more dangerous in case of any shock.
3- With the inverters, regulating the speed of the AC motors is more efficent than in DC motors.
Alternating Current motors are more efficient than DC or direct current. Both motors work by basically positive and negative current chasing itself in a circle which never catches up to itself so the motors turn. DC motor would just sit there, so needs commuated to reverse. The easy way is to have the coil on the armature, and it commutated with brushes on a sectional commutator. The stator is a permanent magnet, or another set of coils fed by DC current, which in effect is equal to a permanent magnet. Not urprisingly, the physics of a motor with both a wound stator The easy way is to have the coil on the armature, and it commutated with brushes on a sectional commutator. The stator is a permanent magnet, or another set of coils fed by DC current, which in effect is equal to a permanent magnet. Not urprisingly, the physics of a motor with both a wound stator and commutated armature works
DC motors is better than AC
ac motor need litle maintenance, is very asy for regulation of velocity is more economic
Its depend where you are using I personally prefer AC motor upon Dc motor due to
Low cost,High power factor,Reliable operation and less maintanance cost as compared to DC motor.
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