Identifying Winding (leads) on 12 lead Generator.
Identifying Winding (leads) on 12 lead Generator.
(OP)
I have a 12-lead generator which has been cut out by monster workers that has no labels or color code. I can take an ohm meter and determine the 6 pairs of windings; however does anyone have a method to determine what each pair is in relation to one another; that is, is a particular winding t1-t4, t2-t5, t3-t6, t7-t10, t8-t11, or t9-t12. I want to connect this generator in low voltage, parallel, wye; which would require parallel of t1-t4 with t7-t10, t2-t5 with t8-t11, and t3-t6 with t9-t12. Also, how does one know which end of the winding it is; that is, is this particular lead of the pair t1 or t4. Would it be out of phase if one paralleled t1 to t10 and t4 to t7? Maybe there is a way with a tone or RF signal? I suppose one could generate with a very low field and try to juggle the 12 leads and meter or scope it out, but that would be quite cumbersome.
Any ideas?
Any ideas?






RE: Identifying Winding (leads) on 12 lead Generator.
Step two:
When you have identified all three groups, connect each pair in series and continue checking. If the connection is correct, you will see double voltage. If one of the coils is reversed the voltage will be zero.
Step three: Connect the windings in star. Continue turning as you measure the phase to phase voltages. The voltages should be equal. If one voltage shows about 55% or 60% it is reversed.
It may be well to remove the injectors or spark plugs before starting. A compression release is a boon. With the compression relieved you should be able to turn the set with a wrench on the front of the crank shaft.
Good luck.
Let us know how it turns out.
Good luck.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Identifying Winding (leads) on 12 lead Generator.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Identifying Winding (leads) on 12 lead Generator.
You should be able to identify all three phases and connect them in parallel. Then connect the groups in star and see my last post for the expected Volt readings.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Identifying Winding (leads) on 12 lead Generator.
1. Rotate the rotor, find one winding and trig on that one.
2. Then use next channel on the scope/recorder and find the winding that is in phase with the reference winding. Mark the two winding's phase and polarity.
3. Still using first winding as a reference, find winding that is 120 degrees after first.
4. Find second winding with same phase. Mark the two windings.
5. Same thing with the two remaining windings. It is quite easy, actually.
You can use anything to rotate the rotor. You don't even have to rotate it at nominal speed but it helps if rotation is fairly constant in speed.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Identifying Winding (leads) on 12 lead Generator.
RE: Identifying Winding (leads) on 12 lead Generator.
RE: Identifying Winding (leads) on 12 lead Generator.
And ground one end of the winding that is being checked and on and on?
RE: Identifying Winding (leads) on 12 lead Generator.
PH, you get phase rotation from the sine wave sequence. No need for extra identification. But easy to do if you want to.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Identifying Winding (leads) on 12 lead Generator.
Yeah, but voltmeters are cheaper (an important factor if you've ever seen me poking around in a live junction box).
RE: Identifying Winding (leads) on 12 lead Generator.
I bought one together with the Scopix 4 channel 200 MHz scope. And I use the RIGOL more on the bench than the Scopix. Scopix is great for field work.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Identifying Winding (leads) on 12 lead Generator.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Identifying Winding (leads) on 12 lead Generator.
RE: Identifying Winding (leads) on 12 lead Generator.
RE: Identifying Winding (leads) on 12 lead Generator.
http://
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.