dynamo![click to hear](/images/speaker.jpg)
Continuous generator of electric current; it is used, for example, on bicycles for lighting.
field electromagnet ![click to hear](/images/speaker.jpg)
Fixed electromagnet made up of an iron bar and coils; when exposed to an excitation current, it creates a magnetic field.
commutator ![click to hear](/images/speaker.jpg)
Conductive plates that are insulated from each other and connected to the field coil; they collect and rectify the induced alternating current.
shaft ![click to hear](/images/speaker.jpg)
Cylindrical part that transmits a rotational motion to the dynamo’s armature.
frame ![click to hear](/images/speaker.jpg)
Metal casing that houses the magnetic field.
fan wheel ![click to hear](/images/speaker.jpg)
Device with blades that circulates air to cool the dynamo.
armature ![click to hear](/images/speaker.jpg)
Moving part of the dynamo that is made up of a coil, which produces an electric current as it rotates inside the field.
coil ![click to hear](/images/speaker.jpg)
Conductive wire that is rolled around the armature cylinder, which rotates in the magnetic field produced by the inductor to create an electric current.
brush ![click to hear](/images/speaker.jpg)
Conductor that rubs against the commutator plates and transmits the continuous current produced by the dynamo to an exterior circuit.