ElectricGod
10 MW
dead thread
As a dead minimum it is evidence for past quality issues...
...Hopefully feedback like this has gotten back to Revolt and they made improvements.
the RV-100 series reveals an interesting detail. I just wish the RV-100 regular was also at a similar Kv. Look at the phase resistances. This is exactly what I would expect. The regular (lowest wattage) has the smallest phases and the highest resistance. Followed by the Pro and then the E with the lowest resistance and largest phases.
Great! That brings your review to a new levelElectricGod said:I pulled out my inductor tester and mOhm meter and tested all 3 phases for the below motors.
Does it really have such high winding resistance?RV-100-regular: 157kv
.12 - .14mH
53.5 mOhms
Good values. There is nothing wrong if the inductance is not identical as it depends on the actual rotor position. Without the rotor it should be identical, but it will be way higher and so not that meaningful.AP 12090: (good) 50kv
.06, .08 and 1.28 mH (WTF?!)
10 mOhms on all 3 phases.
Twice the kV usually means the winding resistance will drop to 1/4.I think the RV-100 series reveals an interesting detail. I just wish the RV-100 regular was also at a similar Kv.
ElectricGod said:Phase amps and battery amps do not necessarily track each other. You can have 6 battery amps and 90 phase amps. On my XB-502 scooter, the battery amps are usually 30-50% what the phases show under load. This is not unusual at all.
...A few pics of the stator. 45mm tall by 112mm wide. Pretty good copper fill, not 100% full, but still far better than the 12090.
..They are .8mm on my calipers and there are 5 strands.
..With thinner wire like in your pro, they could have easily added another strand
What was that about the Revolt motor being wildly inefficient? Seems like it's the other way around! The phase amps in the 12090 are 5X higher!
What?? This is the way incorrect data spreading gets started!the .5mm thick stator lams is spurious and incorrect information.
ElectricGod said:district9prawn said:ElectricGod said:Phase amps and battery amps do not necessarily track each other. You can have 6 battery amps and 90 phase amps. On my XB-502 scooter, the battery amps are usually 30-50% what the phases show under load. This is not unusual at all.
I agree that you can have high phase currents at low battery current, but at a low duty cycle.
You have about 200w of input power with your 20s supply. If the rms phase current was really 22a then you would expect the mechanical output to be way over 200w. Something's gotta give.
What I can tell you is this:
1. Connect a motor to the controller
2. Zero the meter for DC amps, clamp a battery wire
3. Run the motor at WOT and wait a few seconds until current settles out
4. Read the meter
5. Unclamp the meter, set it for AC, re-zero, clamp a phase wire
6. Run the motor at WOT and wait a few seconds until current settles out
7. Read the meter
8. Repeat steps 1 to 7 for the next motor.
The meter reads what the meter reads...
When i spin up my 8057 with Nucular controller, the display shows 1,5A battery and 7A phase current at 100% duty cylce.district9prawn said:How can you have 22A phase and 3A battery at full speed no load?