Generator.. AC vs DC

[chperplt]

Generator A puts out DC and via an inverter, puts out AC.

Generator B puts out AC and via a TRU, puts out DC.

Question.. What differences within the generator make the output one or the other?? (DC vs AC)


Thanks

 

[enigma]

Generally speaking. A true DC generator generates power by rotating its armature(windings) inside of stationary magnets, while an AC generator generates power by rotating the magnet inside of its field (windings). The disadvantage of a pure DC generator is that all of the electricity must pass through rotating contacts (brushes). The amount of amperage that the brushes can reliably carry is limited.

The alternating current generator, or alternator, only needs to send a small current to the rotor to magnatize it, and all of the power can be supplied directly to a buss without going through a set of brushes.

I just tried and failed to adequately explain the internal wiring differences between the two generators, so I deleted it. I'll do some research. Or just wait for Avbug, or ASquared to give a better answer.

good question,
enigma

 

[enigma]

I searched and found this site. It gives a pretty good description.

http://members.1stconnect.com/anozira/SiteTops/energy/Alternator/alternator.htm

enigma

 

[Timebuilder]

A generator makes DC directly, no pun intended. It isn't very efficient, particularly at low speeds. An inverter, depending on type, can make a sawtooth AC waveform or a sinusoidal AC waveform.


An alternator makes AC, usually in three phases, using a small current through a rotating field winding. You can control the output of the alternator by varying that field current.

Anyway, you then take that three phase AC and recify it by means of a diode bridge to get a very nice DC source that even produces a good output at a low RPM.

Does that help?