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Dc is an electrical term for direct current. Ac stands for alternating current. As you probably guessed a dc moter uses dc current and an ac moter uses ac current.

P.S. Most home outlets use ac current.

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13y ago
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14y ago

let me tell you what does each word means:

Motor: is a device which converts electrical energy(Voltage/Current) into mechanical energy (eg: rotating shaft)

Generator: is a device which converts mechanical energy (eg: rotating shaft) into electrical energy(Voltage/Current).

DC: electricity in which voltage has constant polarity and current flows in same direction.

AC: electricity in which voltage switches polarity (+ve to -ve & vice versa) and current flows backforth (Changes direction periodically)

An AC generator can act as an AC motor (ie what is called "motoring", and is undesireable in the power industry).

The most obvious difference between what you're asking is their purpose as the prevous answerer points out. Second is one uses AC vs. DC., which effects the physical makeup of the device. There are many more, but I will stop with three - a DC motor's speed is variable / not constant, while AC generators are typically spun at "synchronous" speed, and kept there.

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14y ago

Ac motors switch fields every 1/60th of a sec. Also use alternating current to operate the windings

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15y ago

The type of currency they need to run.

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Q: Main difference between ac and dc motor?
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