Questions and Answers
What is the rotor in a DC motor?
What are armature windings?
Coils of wire wrapped around or embedded in the rotor shaft.
What is the purpose of the commutator?
To periodically reverse electrical and magnetic polarity of the armature.
What do brushes do in a DC motor?
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What are field magnets?
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Study Notes
Major Components of a DC Motor
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Rotor:
- Comprises all rotating parts of the machine.
- The drive shaft transfers torque generated by the motor.
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Armature Windings:
- Consist of coils of wire that are either wrapped around or embedded in the rotor shaft.
- Induced magnetism within these coils interacts with stationary magnetic fields to facilitate the rotation of the rotor.
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Commutator:
- Composed of isolated conductive bands mounted on the rotor.
- Acts as a termination point for the armature windings and periodically reverses the electrical and magnetic polarity of the armature to ensure continuous rotation.
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Brushes:
- Made of soft carbon, these stationary bars maintain contact with the commutator.
- Serve the crucial function of delivering direct current (DC) electrical energy into the armature.
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Field Magnets:
- Consist of either stationary coils of wire or permanent magnets that encircle the rotor.
- Provide the stable magnetic field against which the armature's induced magnetism operates, enabling rotation.
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Description
Test your knowledge on the key components of a DC motor including the rotor, armature windings, commutator, brushes, and field magnets. This quiz covers their functions and interactions necessary for motor operation. Ideal for students studying electrical engineering and motor design.
