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There are many differences between AC and DC motors. The most obvious difference is the type of current that each motor transforms into power, alternating current in the case of AC motors and direct current in the case of DC motors. AC motors are known for their higher power and efficiency, while DC motors are valued for their speed control and output range. AC motors are available in single-phase or three-phase configurations, while DC motors are always single-phase.
More about AC motors
In an AC motor, power comes from magnetic fields generated through coils wound around the output shaft. AC motors consist of several parts, including a stator and a rotor. AC motors are efficient, durable, quiet and flexible, making them a viable solution for many power generation needs.
The two types of AC motors include:
Synchronous: The synchronous motor rotates at the same rate as the frequency of the supply current, which gives the motor its name. Synchronous motors are constructed of a stator, rotor and synchronous motors are used in a wide range of applications.
Induction: Induction motors are the simplest and most robust electric motors available. These AC electric motors consist of two electrical assemblies: the wound stator and the rotor assembly. The electric current needed to turn the rotor is created by electromagnetic induction created by the stator winding. Induction motors are among the most commonly used motor types in the world.
AC motors are used in a variety of applications, including food service pumps, water heaters, lawn and garden equipment, and more.
More about DC motors
The power used by a DC motor comes from batteries or other generated power source that provides constant voltage. DC motors are made up of several parts, the most notable of which include bearings, shafts, and a gearbox or gears. DC motors offer better speed variation and control and produce more torque than AC motors.
The two types of DC motors include:
Brushed: One of the oldest types of motor, brushed motors are internally switched electric motors powered by direct current. Brushed motors consist of a rotor, brushes, a shaft, and the load and polarity of the brushes control the direction and speed of the motor.
Brushless: In recent years, brushless motors have gained popularity for many uses, largely due to their efficiency. Brushless motors are built the same way as brushed motors, minus, of course, the brushes. Brushless motors also include specialized circuitry to control speed and direction. In brushless motors, magnets are mounted around the rotor, a configuration that improves efficiency.
DC motors are used in a wide range of applications including electric wheelchairs, portable sprayers and pumps, coffee machines, off-road equipment and more.
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