WHAT IS THE DIFFERENCE Between AC Motor And DC Motor?
Difference between AC motor and DC motor. Alternating current and direct current are two types of electric motors that convert electrical energy into mechanical energy. They have different properties, advantages, and disadvantages.
Here are some of the key differences between them:
The AC motor uses alternating current (AC) as the input power source, while the DC motor uses direct current (DC) as the input power source¹².
The AC motor has a fixed armature and a rotating magnetic field, while the DC motor has a rotating armature and a stationary magnetic field²⁵.
The AC motor can operate on single-phase or three-phase power, while the DC motor can only operate on single-phase power²³.
The AC motor starts in three-phase mode but requires a single-phase starting mechanism, whereas a DC motor always startsitself²⁴.
The AC motor can change its speed by changing the frequency of the input power, while the DC motor can change its speed by changing the current in the armature winding¹³.
The AC motor is more powerful and efficient than a DC motor, but the DC motor is easiertocontroland more responsive to load changes¹³.
The AC motor has no brushes and commutators, which reduces maintenance and increases servicelife, while the DC motor has brushes and commutators, which cause wear and limit speed and servicelife¹².