Message text written by Joe Mato
>Has anyone heard of a coil winding check you can do on a generator while
it is on a bench, to see if it's worth installing? Joe Mato TR-3A 75219
<
Joe, connect a jumper between the F and D terminals and then connect it to
a 12 volt supply (battery). Be sure to secure the genny because if it is
good the armature will start to spin and the reacion torque on the body may
cause it to roll off the work bench.
As is typical, generators make motors when the power flow is reversed.
Motors make generators when power flow is reversed, too. Click and Clack
talked about an instance where the fan control circuit on a (fill in the
blank) stopped working so the mechanic just wired the fan to the coil. The
net result was that when the key was shut off the engine continued to run
for a second or two as the fan spun down all the while generating enough
voltage to power the coil.
Making a motor out of an alternator would require applying three phase AC
to the stator windings and DC to the rotor. More unnecessary facts
available upon request.
If you set the polarity (on the test above) the same as what it will be in
the car you will also polarize the generator at the same time.
Cheers
Dave
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