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55 amp alternator rpm?
How many rpm will I need to get out of an electric motor(not car) to run a 55 amp alternator?
2 Answers
- MarkGLv 79 years ago
Anywhere from a few hundred (350+) rpm to a couple of thousand . basically across the RPM range of the engine. RPM is not as much of a factor because the alternator output is rectified by six diodes into DC. RPM is more of an issue when you are trying to produce AC at a steady frequency.
Note: because of different pulley diameters there is a speed increase between the alternator RPM and Engine RPM's referenced above. The alternator is driven from 2.5 to almost 4 times the crankshaft speed
It will be the ability of the voltage regulator to excite the field winding with enough current to support the voltage at the required current draw. The voltage regulator adjusts the strength of the magnetic field that the electromagnetic field winding produces.
The current draw from the charging system is based on the load, the current supplied is only the amount that the load demands.
