How the Auto Dynamo (Generator) Generates Current
The generator has two weak permanent magnets inside its round casing. When current flows through the coils of wire around the magnets, they are transformed into electro magnets. An armature— mounted in a front end plate and supported in a rear plate—generally containing about 28 loops of wire, is suspended and rotates between these field coils. The rear end plate of the generator contains two brushes which, under spring loading, make contact with the commutator of the armature. (more…)
Auto Parts, Auto Electric Generators Repair and Maintenance Guide
Producing Current for the Auto Electrical System
All cars have a device for generating electricity. Without this, the electrical demands could drain a fully charged battery in a matter of hours.
The device may be either a dynamo (generator) which produces direct current (DC), or an alternator, which produces alternating current (AC).
An alternator can produce more current than a dynamo of the same size, and so charge the battery when the engine is idling. This gives it an advantage in heavy traffic and permits the use of extra accessories. But a battery- is charged by DC current only, so an alternator needs a rectifier to convert AC into DC current. (more…)
