How to Identify a TP Power motor

[Crash]

Is there anyway to identify a TP motors KV?

its 92mm long
8mm shaft
1018181408.jpg

[Crash]

so I did a bench test to see if I could get a real time rpm measurement

with the prop and flex shaft disconnected from the motor I am only getting 17900 rpm on 5S that seems really low unless this motor is a 1050kv its suppose to be a 1650kv

did I do the math rite?

[Prodrvr]

It should be written on the can at the wire end. That's how mine are.

[Prodrvr]

1050Kv on 5s should be 19,425 rpm.

[srislash]

I get closer to 18,200 for the 1050 but then that would be loaded with good packs. Most of my TP’s do have a KV on them but it is just a small sticker. Perhaps one of those little Watt meters would help

[srislash]

so I did a bench test to see if I could get a real time rpm measurement

with the prop and flex shaft disconnected from the motor I am only getting 17900 rpm on 5S that seems really low unless this motor is a 1050kv its suppose to be a 1650kv

did I do the math rite?

Do you have a voltage for that exact 17,900 time frame? 17,900 divided by voltage should give KV. I assume you are using the ESC to get data?

And if it is 1650 I’d be using like a 3s pack for full throttle.

[fweasel]

The kV is written in pen on a sticker near the end bell and is pretty useless after about a season. I take the stickers off. Which reminds me, I want to start engraving that kV number into the end cap on mine.

[donhuff]

Here is the setup that I use to check the actual Kv.

DSC_5833.jpg

[golfito]

I am very interested.
I ask, disarming the motor to determine if it is a motor with configuration Y (star) or with configuration D (delta). And then you get the internal resistance between two stator terminals. (using the method of circulating a current through the winding under test) R = V / A. Obtain the internal resistance in that way and then compare that value with the manufacturer's RI tables. Can it be viable?

[golfito]

201792193328794.jpg
103351_77626ac0b1e435a1154ff2242d2d5f1f.jpg
Motor Resistance Measurements.jpg

https://www.wattflyer.com/forums/showthread.php?t=50740

https://forum.flitetest.com/index.php?threads/lc-meter-to-check-motors.20346/

[Speedfreek]

[ATTACH=CONFIG]162243[/ATTACH]
[ATTACH=CONFIG]162242[/ATTACH]
[ATTACH=CONFIG]162244[/ATTACH]

https://www.wattflyer.com/forums/showthread.php?t=50740

https://forum.flitetest.com/index.ph...-motors.20346/

Stupid question for you, lets say you can have a identical kv in Y and D which one would be better ?

[golfito]

I think I understand. Excuse my English.
I am a beginner in these subjects. And for what I am reading:
I think you should not worry about the type of configuration D or Y to choose an engine to the same KV. Both are very effecient. But you should know what kind of time or progress to use in each type of configuration.

[Speedfreek]

I think I understand. Excuse my English.
I am a beginner in these subjects. And for what I am reading:
I think you should not worry about the type of configuration D or Y to choose an engine to the same KV. Both are very effecient. But you should know what kind of time or progress to use in each type of configuration.

Ok thanks, so your saying just chose what kv you want and don't worry about if it is a Y or D wind, yes ?

[golfito]

Yes.
I choose the kv that I consider appropriate.
I only take precautions when choosing the timing or progress.
I have 7D engines where I use 0 timing. And other 1.5Y engines where I use 11.25 timing.
Perhaps the most advanced runners can notice some difference between the Y and the D engines at the same KV number.

[Speedfreek]

Yes.
I choose the kv that I consider appropriate.
I only take precautions when choosing the timing or progress.
I have 7D engines where I use 0 timing. And other 1.5Y engines where I use 11.25 timing.
Perhaps the most advanced runners can notice some difference between the Y and the D engines at the same KV number.

Thanks for your input
Sorry for the hijacking