Problem with Avionics motor.

Started by rcrcnitesh, January 03, 2014, 07:31:21 PM

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rcrcnitesh

Update got the c clip removed by an rewinding shop owner.
Cant find from where to start unwinding.
Maker | Aeromodeller | Teenager

rcrcnitesh

More pics
Its 12 pole 14 magnets.
How to unwind cant starting point of the wire.
Maker | Aeromodeller | Teenager

rcrcnitesh

Actually now the problem is I can't remove the wires from the stator only one tooth and from another a tooth only one wind everything is stuck and the windings can't be removed.
Maker | Aeromodeller | Teenager

manojswizera

Nitesh, Instead of asking so many questions, Search a little bit .

Go to this thread, you will get your max questions answered.

http://www.rcindia.org/electric-power/can-this-bldc-motor-be-repaired/
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rcrcnitesh

I read the whole thread already.
Can i cut the wires.
Maker | Aeromodeller | Teenager

rastsaurabh

dear nitesh.... first check if winding need to be redone??

as per pic they seems to be OK.... what is wrong in winding?

rcrcnitesh

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moorthy

You want to go up---pull the stick back--You want to go down---pull the stick waay back!

rcrcnitesh

Maker | Aeromodeller | Teenager

rastsaurabh

ok if its melted .... search on google with rewinding the brushless motor .. u will find relevant info.....

rcrcnitesh

Have seen multiple videos and threads. My motor is a dlrk wind.
Maker | Aeromodeller | Teenager

sam1312

Dear sir the above motor u'd specified would provide the thrust mentioned at the rcbazaar site when we use the given combinations or its just hypothetical data.....do we get this thrust at 100% throttle or at 50-60% throttle only

anwar

The thrusts typically mentioned in motor specs would be at WOT with the given prop and input voltage. To measure actual static thrust, the scale test is a simple way of doing it. This is where the plane is tied to a spring loaded kitchen weighing scale, and see how much the plane can displace the scale.

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sam1312

DEAR sir thanx for ur reply but plzz try to xplain again about the scale test and if there is any theoretical calculations with which we can get an idea if thrust produced by motor at given voltage and prop size

sam1312

Also sir in the rc bazzar site i observe that the combination provided by the companies especially avionics motor was very much hypothetical for eg in one of the motor C3536/1900kv they are promising thrust of 1200gm with 3s and 9*4.7 props with esc of just 30 amps when at load condition motor ddraws around 37.33 amps .......so how can i thrust there data and buy a product.....try to xpalin sir

anwar

Theoretical ? Something like this ?

http://www.rcindia.org/electric-power/how-to-calculate-the-thrust/ (see link in reply #1).

Basically you have to do a bit of searching.

Also, when you talk about a product, please post a link here, so that we all can verify what you are saying, and point out anything that you may have overlooked.

And you are right, some of the ESC choices listed seem wrong.  For example, for this motor below, there are multiple combinations where the peak current at load is higher than the ESC rating, and this is not a good thing.

http://rcbazaar.com/products/1908-avionic-c3536-kv1100-brushless-motor.aspx



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rcrcnitesh

Hello guys,
A small update with the rewind of this motor.
I want cleaning my room when I stumbled upon this long forgotten piece of metal, I decided to make some use of it. I've been able to remove the stator with the windings. But the thing is I am not able to find the bearings and the c clip for this motor. Anyone knows where can I find it?



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Maker | Aeromodeller | Teenager

rcrcnitesh

There is another problem. While removing the windings I was getting frustrated and I caused some damage to the stator removing some of it's insulation and also a strand of two of us poles has come out.



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tictoc21

U can find c clip at computer processor fan which is while plastic . And they work very well

rcrcnitesh

A computer processor fan. Hmmm. Will it fit? I'll surely try it.

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tictoc21

U can use very small quantity of araldite for better insulation. Please check with DMM continuity tester and check with stator and coil.

tictoc21

Definitely processor fan is 3mm shaft. Just try it

tictoc21

Another way to use you motor is you have change motor shafts position. Since it is backward, u can use it with forward shaft in pusher configuration without c clip.

rcrcnitesh

Thank you so much. I'll try the c clip from CPU fan. Now what should I do about the bearings and the grub screw? Also insulating with epoxy? How? Any videos or articles?

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tictoc21

Please mention what happens to bearing and grub screw? And insulation? Any pic