Universal Motor
A universal motor is a rotating electric device that can operate on either direct current (DC) or alternating current (AC).
A universal motor is called universal because of this flexibility, although they almost always operate on AC power. Yet unlike AC motors,
a universal motor can be used for high-speed operations.
A universal motor offers an advantage over regular AC motors because they have a high starting torque level. The disadvantage, however, is that
a universal motor has a considerably shorter life. For this reason, a universal motor
is most often found in AC devices that are only used intermittently. A universal
motor will supply power to blenders, vacuum cleaners, power tools, clothes washers, fans, and blow dryers.