Alternator

[Qacer]

Hello all,

I'm not too knowledgeable on alternators. I was wondering about the relationship of current, voltage, and RPM. From a Lincoln Motors document, it seemed that current is both proportional to torque and RPM. However, torque is inversely proportional to RPM. So, I'm a little confuse.

In terms of a single phase motor, how does a change in RPM affect the output current? Does RPM also affect the ouput voltage?

Thanks!

 

[Pulsar]

Alternators that I am familiar with are not single phase. The alternators that I used to work with (Delco) have 3 sets of wires and are actually 3 phase. Those wires run through 3 sets of zenier diodes and then a rectifier bridge that rectifies the output waves into something resembling DC.

As RPM increases, output increases. We rarely look at the torque of an alternator, however it is somewhat obvious that it will require more torque to turn it faster and in turn generate more current.

Therefore the resistance torque, current generated, and RPM should all be directly proportional.