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What are the differences between AC motors and DC motors?

1 Answers

ConnorLee

07/29/25 4:59pm

The differences between AC motors and DC motors are as follows: 1. Different types of input power: AC motors use alternating current (AC) power sources, while DC motors use direct current (DC) power sources. 2. Different motor structures: For example, DC motors generally have brushes and commutators, while AC motors usually do not. Sparks often occur between the brushes and commutators of DC motors, causing the commutator surface to oxidize or even become insulated. 3. Different applications: DC motors are mainly used in power machinery or other equipment that requires a wide range of speed regulation, such as planers, rolling mills, and electric rail traction. AC motors are mainly used in power machinery or other equipment that does not require a large speed regulation range, such as general fans, water pumps, machine tools, and cranes on construction sites. 4. Different working principles: In DC motors, the magnetic field remains stationary while the conductors move within the magnetic field; in AC motors, the magnetic field rotates while the conductors remain stationary.

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