I did the three phase test at 2000 RPM VAC was 28 VAC
Also at 2150 to 2200 RPM 31VAC
Last was to ground at 2000 RPM 17.2 to 17.5 VAC
All the above readings can be done individually and should be plus or minus 2 VAC of my readings.
All your measurements should be within 0.5 to 1 VAC between 1;2;3, they should also be identical.
For those looking at this, yes I have 3 meters connected
, one on each 3 phase connection, meter 1 is orange to yellow; meter 2 is yellow to blue; meter 3 is blue to orange.
One other point, when looking at the individual pictures, the JPG also contains information as to what conditions the photo was taken
i.e. the 31 VAC picture was taken @ 2150 to 2200 RPM
Using 1 digital mete
r , idle fixed using idle screw
@ 2000RPM the readings per phase should be within 0.5 to 1 VAC on all 3 readings
If readings vary by more than 3 VAC, ++ If your no load phase voltage at 2000 RPM on a Delta wound OEM stator is less than 20 VAC, YOU have shorted turns
in your stator.
Again, the idle screw must be used
to set 2000 RPM, remember the tach isn't a direct connection through a flexible cable like the old days, this is a digital readout, thinking you can hold it exact is going to throw the readings off .
One point I want to make, checking open circuit with the motor at a fixed RPM is the closest thing to getting it surge tested in a motor shop. Each pole in the delta configuration has 44 turns, so that is 264 turns per phase, 2 shorted turns will show up as the voltage difference I described in earlier postings. The reason is, that the shorted turns have become a load in the rotating magnetic field,the phase with the lowest voltage is the phase with the shorted turns.
As this winding continues to fail, the phase with the shorted turns will drop even more, the remaining two phases will display what appears to be normal voltage, what Holden posted in test 2;
however the energy being shorted out , will reduce the overall output of the remaining good phases------the readings should have been 22 to 28 VAC
Another way of looking at it
, in my burnt stator post 383, I had one photo showing under load @200
0 RPM 14.2 VDC and 21 VAC, I know the load is about 6 amp = 6 X 14.2 = 85.2 Watts
So open circuit if the reading was were the averaged measurements = 21 VAC, we could assume we have a internal shorted load of 85 watts.
FastEddie 2015 Stator from Burnt Stator posting:
In answer to a request/ question from "onewizard": I just checked the NO-LOAD voltage on my 2015's stator.
At 2,300 rpm EACH coupled output (A - B; A - C; B - C) was 27 ACV, +-.
At 2,000 rpm, ALL were 25 ACV +-.
Then I checked each to GROUND at 2,000 rpm, and got 15 ACV +-.
Earlier I've posted that the 2015s seem to be built w/ SOMEONE putting co$t above ALL ELSE, as wires seem to be JUST long enough (to make the bike...), but NOT quite long enough to remove, or to fiddle with! A real buggar, getting these things apart...!