The difference between DC motor and AC motor
The difference between DC motor and AC motor
There are several differences between DC motors and alternating current (AC) motors . Among these differences :
1- DC motors require a constant current source , while AC motors operate with alternating current .
2- DC motors are distinguished by their precise speed control and quick response to load changes, while this is more difficult in AC motors .
3- DC motors can easily run reverse by changing the direction of the current, while in AC motors this requires additional procedures .
4- DC motors require a brush to transmit current to the rotor, while an AC motor does not need a brush .
5- The DC motor requires periodic maintenance to replace the brush and clean the moving part , while AC motors do not require similar maintenance .
6- DC motors are more efficient in operation when the speed is controlled using variable electromagnetic torque ( PWM ) techniques , while AC motors can be more efficient in operation when frequency control techniques are used . VFDs
7- DC motors are more expensive to purchase and maintain than AC motors . _
8- DC motors can withstand greater torque when they are operated on constant current . _
9- DC motors are more tolerant of harsh conditions compared to AC motors , and can be used in many industrial and commercial applications that require durability and quick response to speed control .
The difference between DC motor and AC motor
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