RC India

RC Equipments => Electric Power => Topic started by: arun.sreelakam on December 11, 2012, 02:59:04 PM

Title: rewinding emax 2822
Post by: arun.sreelakam on December 11, 2012, 02:59:04 PM
can you guys please help me for rewinding my emax cf 2822 1200Kv motor...
i have a spare one which is damaged(one wire came out from the motor) :banghead: :banghead:
please give me some ideas or informations for rewinding my motor..
i am planning for delta winding with 22g wire but dont know how many turns? :headscratch: :headscratch:
Title: Re: rewinding emax 2822
Post by: rastsaurabh on December 11, 2012, 03:17:06 PM
This may help you .... I copied from some site.....
change JPG to rar for doc file. in case no success send me your mail id.
Hit reputation button of you get exactly what you asked for .... ;D
Title: Re: rewinding emax 2822
Post by: sanjayrai55 on December 11, 2012, 05:35:14 PM
Can't you count the number of turns while removing?
Title: Re: rewinding emax 2822
Post by: arun.sreelakam on December 11, 2012, 07:04:45 PM
@rastsaurabh: yaar thanks for the help, but i already read lot about winding methods and types.. i was confused in the no of turns and wire gauge ratio.. :(  :headscratch: :headscratch:
Title: Re: rewinding emax 2822
Post by: arun.sreelakam on December 11, 2012, 07:06:44 PM
Quote from: sanjayrai55 on December 11, 2012, 05:35:14 PM
Can't you count the number of turns while removing?

sir i didnt remove the old winding yet so that i can count the number of turns, but will the number of turns varies with respect to the wire thickness..? :headscratch: :headscratch:
anyone done this yet?
Title: Re: rewinding emax 2822
Post by: sanjayrai55 on December 11, 2012, 07:08:55 PM
Should'nt you use the same wire gauge? This is what I have seen electricians rewinding Industrial motors do
Title: Re: rewinding emax 2822
Post by: arun.sreelakam on December 11, 2012, 07:13:15 PM
but how to know which gauge wire is used?
Title: Re: rewinding emax 2822
Post by: arun.sreelakam on December 11, 2012, 07:14:33 PM
if i take this to the electrical shop can they find the exact match just by seeing this? will make a try tomorrow.. thanks sanjay anyway... will update the progress...  :thumbsup: :thumbsup:
Title: Re: rewinding emax 2822
Post by: sanjayrai55 on December 11, 2012, 07:16:20 PM
I'm sure they can. They can even rewind for you. All the best
Title: Re: rewinding emax 2822
Post by: rastsaurabh on December 11, 2012, 07:40:02 PM
Arun the doc explans it all..... see some part here....
# of turn calculation

Original field rotation speed * # turns = new field rotation speed * new # turns
Thus:
New Wind = (Original field rotation speed / Desired field rotation speed) * Original # of turns

Again targeting 2200 kV we calculate # turns for 14,10, an 8 magnets

14 magnets - (7609/15400) * 16 = 7.9 - We'll round it to 8 turns
10 magnets - (7609/11000) * 16 = 11.05 - We'll round to 11 turns
8 magnets - (7609/8800) * 16 = 13.8 - We can estimate about 14 turns.

Calculate Rm

Copper loss may be estimated by two methods:

Method #1: New Rm = ((New # turns/ Original # turns) * Original Rm) / (1+ % fill change)
Where % fill fill change is an estimate of how much more or less filling of copper you plan on fitting in the stator. This can be calculated or just estimated.
Title: Re: rewinding emax 2822
Post by: arun.sreelakam on December 11, 2012, 08:58:51 PM
@rast saurabh: yaar actually i didn see the text file yet.. now i am unable to view it.. :(
cant change the the extension to rar..  :help:
Title: Re: rewinding emax 2822
Post by: sundaram on December 11, 2012, 10:29:15 PM
Go through this thread Lot of tips and info on rewinding a brushless.

http://www.rcindia.org/electric-power/can-this-bldc-motor-be-repaired/
Title: Re: rewinding emax 2822
Post by: rastsaurabh on December 12, 2012, 10:19:19 AM
Dear Arun,
Down load / save as on your computer desktop first.

post that change the jpg extn to  .rar.

then try opening.
Title: Re: rewinding emax 2822
Post by: arun.sreelakam on December 12, 2012, 11:08:55 AM
Quote from: sundaram on December 11, 2012, 10:29:15 PM
Go through this thread Lot of tips and info on rewinding a brushless.

http://www.rcindia.org/electric-power/can-this-bldc-motor-be-repaired/
sir great link.. gonna start my winding on saturday.. will upload the progress.. as this is my first ever attempt need all of ur help..   ??? ???
Title: Re: rewinding emax 2822
Post by: arun.sreelakam on December 12, 2012, 11:13:51 AM
Quote from: rastsaurabh on December 12, 2012, 10:19:19 AM
Dear Arun,
Down load / save as on your computer desktop first.

post that change the jpg extn to  .rar.

then try opening.

man tried it a lot of time.. dont know unable to open(may be my mistake).. can you please send the rar file to my mail..  :banghead: :banghead:

thanks for the help dude..
Title: Re: rewinding emax 2822
Post by: rastsaurabh on December 12, 2012, 11:14:54 AM
Sent on your mail..
Title: Re: rewinding emax 2822
Post by: arun.sreelakam on December 12, 2012, 11:29:31 AM
saurabh got it thanks a lot...