How to bench test alternator

[fixkick]

the wind mill power generator pages shows this.
"Typically, the lowest speed at which a car alternator is able to generate 12VDC is about 1,800RPM."
my Delco chart above shows same.
so spinning it by hand does nothing.


the math and faradays laws are here on topic.

https://digitalcommons.calpoly.edu/cgi/v...ntext=eesp


in the auto store the machine there has huge fast electric motor to spin it up.
the suzuki is 5000 rpm crank shaft and x4 is 20,000 rpm alternator. (the pulley ratio dictates that)