Brushed Motor
It’s called brushed motor because there are 2 brushes (see image below)
- Stator: Stationary, provides a continuous magnetic field through permanent magnets or electromagnets
- Rotor (armature): part of the motor that rotates
- Commutator: makes a connection between the rotor and the brushes (copper pad)
- Brushes: connected to the DC power source
How It Works
- https://www.youtube.com/watch?v=I2_-etus0KQ&t=382s&ab_channel=Electronoobs
- https://www.digikey.ca/en/blog/basics-of-brushed-dc-motors
- https://us.aspina-group.com/en/learning-zone/columns/what-is/013/
The energy given by the battery activates the brushes. The brushes make contact with the commutator (copper pad), which energizes a particular magnetic coil.
Since these coils are surrounded by a magnet contained in the stator, the rotor starts rotating. Then, the brushes make contact with a different set of commutators, and active a different magnetic coil. So then the rotation keeps going.
- To make rotation smooth, more coils and commutators are added to the rotor.
Though watch Electronoobs take one apart to really understand:https://www.youtube.com/watch?v=I2_-etus0KQ&t=382s&ab_channel=Electronoobs
Special Case
There does exist a type of Brushed Motor that works both with DC and AC current. These are called Universal Motors.