How to Select DC Motors
Image Credit: Dart Controls, Inc.; Galil Motion Control; Stock Drive Products/Sterling Instrument
DC motors are electric motors that are powered by direct current (DC), such as from a battery or DC power supply. Their commutation can be brushed or brushless. The speed of a brushed DC motor can be controlled by changing the voltage alone. By contrast, an AC motor is powered by alternating current (AC) which is defined by both a voltage and a frequency.
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