A motor provided by AC motor supplier that converts the alternating current into mechanical power by using an electromagnetic induction phenomenon called an AC motor. This is driven by an alternating current.
The machine that converts electrical energy into mechanical energy is called a DC motor. It takes electrical power through direct current and converts it into mechanical rotation.
Here are some common differences between AC and DC motors.
There are two types of DC Motor; motor with brushes and without brushes.
Two types of AC motors are synchronous and induction AC motors.
In a DC motor, energy is got from cells, batteries, etc.
In an AC motor, single-phase or three-phase power is got from the main supply.
The DC motor will run when the DC supply is given. In the DC series motor, it runs with an AC supply.
AC motors run only when an input of alternating current is given.
These are present in DC motors and absent in AC motors.
DC motors can only run on a single-phase supply while AC motors can run on both; three-phased and single-phase supplies.
The starting mechanism of DC motors is self-starting.
In an AC motor, a single-phase requires a mechanism to start, while a three-phase is self-starting.
In DC motors, when the magnetic field is stationary, the armature rotates.
In AC motors, the magnetic field rotates while the armature is stationary.
DC motors have two input terminals that are positive and negative.
AC motors have three input terminals that are red-yellow-blue (RYB). This is a three-phase terminal.
Speed can be controlled by changing the armature winding current in the DC motor.
By varying the frequency, speed can be changed in the AC motor.
It is higher in DC depending on the setting, while it is less in the AC motor.
The load change shows a quick response in the DC motor while the slow response in the AC motor.
As there are brushes and commutators in a DC motor, it limits the speed and reduces the life of the motor.
While the AC motor doesn’t have brushes and commutators, they are equipped and are durable.
As there is no slip and induction current loss in a DC motor, their efficiency is high. A VHS motor also has high efficiency.
Due to induction current loss and slip in the AC motor, their efficiency is less.
Due to brushes and commutators in the DC motor, it requires extra maintenance. In the absence of these AC motors, the motor requires less maintenance.
The maintenance cost of a DC motor is more expensive as compared to an AC motor.
Where variable speed and high torque are required, DC motors are used while, where high speed and variable torque are required, AC motors are used.
DC motor is mostly used for domestic appliances while an AC motor is applied in large industries.