RC India
Welcome Guest, please login or register.
 
Pages: 1 2 3 [4] 5   Go Down
0 Members and 1 Guest are viewing this topic. Topic Tools Topic Tools 
Read
« Reply #75 on: July 14, 2011, 08:51:08 PM »
Swapnil
Plane Lover
Forum Hero

*****

Reputation Power: 20 
Swapnil barely matters.Swapnil barely matters.
Offline Offline

City: Pune
State: Maharashtra
RC Skills: Beginner
Posts: 1755
Join Date: May, 2010

Retreat, Hell!



Wow, thanks sir! This thread is turning out to be a really informative tutorial.
We'll be eagerly waiting for the test photos and vids.
Logged
 

Read
« Reply #76 on: July 14, 2011, 09:44:15 PM »
aditya
Innovator
Plane Lover
Forum Veteran

****

Reputation Power: 4 
aditya has no influence.
Offline Offline

City: new delhi
State: Delhi
RC Skills: Beginner
Posts: 309
Join Date: Nov, 2009



waiting for testing ...
Logged

Mechanical Engineer
 

Read
« Reply #77 on: July 16, 2011, 02:50:38 PM »
TEJASCOOL007
Plane Lover
Active Member

**

Reputation Power: 2 
TEJASCOOL007 has no influence.
Offline Offline

City: KALYAN
State: Maharashtra
RC Skills: Beginner
Posts: 71
Join Date: May, 2009



sundaramvelar sir,
thanks a lot for the information on rewinding...
i too winded my motor with the help of this post...
and special thanks to ANGAD who guided me ....
http://i706.photobucket.com/albums/ww69/TEJASCOOL007/2011-07-16142600.jpg
Can this BLDC motor be repaired?

http://i706.photobucket.com/albums/ww69/TEJASCOOL007/2011-07-16142549.jpg
Can this BLDC motor be repaired?

http://i706.photobucket.com/albums/ww69/TEJASCOOL007/2011-07-16142002.jpg
Can this BLDC motor be repaired?

http://i706.photobucket.com/albums/ww69/TEJASCOOL007/2011-07-16133153.jpg
Can this BLDC motor be repaired?

Salute Salute Salute
Logged

struggle is the only key to become airbone..!!!
 

Read
« Reply #78 on: July 16, 2011, 04:44:30 PM »
sundaram
FAN OF FPV FLYING, AERIAL PHOTOGRAPHY & MICRO RC
Plane Lover
Forum Hero

*****

Reputation Power: 38 
sundaram is working their way up.sundaram is working their way up.sundaram is working their way up.
Offline Offline

City: Gandhinagar
State: Gujarat
RC Skills: Advanced
Posts: 3407
Join Date: Nov, 2009



You could have reduced the number of turns per pole by two or three for more even fill. However since you have been able to wind all poles no worries.
Logged

 

Read
« Reply #79 on: July 16, 2011, 09:23:35 PM »
TEJASCOOL007
Plane Lover
Active Member

**

Reputation Power: 2 
TEJASCOOL007 has no influence.
Offline Offline

City: KALYAN
State: Maharashtra
RC Skills: Beginner
Posts: 71
Join Date: May, 2009



no sir i have kept turns tthe same ie.15 turns
instead i changed the wire used
previously 3 wires bunch was used now a single thick wire as seen in pics
will that do....Huh??
« Last Edit: July 16, 2011, 11:29:01 PM by SunLikeStar » Logged

struggle is the only key to become airbone..!!!
 

Read
« Reply #80 on: July 16, 2011, 09:26:31 PM »
sundaram
FAN OF FPV FLYING, AERIAL PHOTOGRAPHY & MICRO RC
Plane Lover
Forum Hero

*****

Reputation Power: 38 
sundaram is working their way up.sundaram is working their way up.sundaram is working their way up.
Offline Offline

City: Gandhinagar
State: Gujarat
RC Skills: Advanced
Posts: 3407
Join Date: Nov, 2009



That what I was implying since you have used a thicker wire you could have reduced the number of turns per pole by two. It would have reduced the crowding and would have a more even winding. Now that you have been able to complete all pole without wire spilling outside the pole shoes no issues.
Logged

 

Read
« Reply #81 on: July 21, 2011, 10:36:06 PM »
sundaram
FAN OF FPV FLYING, AERIAL PHOTOGRAPHY & MICRO RC
Plane Lover
Forum Hero

*****

Reputation Power: 38 
sundaram is working their way up.sundaram is working their way up.sundaram is working their way up.
Offline Offline

City: Gandhinagar
State: Gujarat
RC Skills: Advanced
Posts: 3407
Join Date: Nov, 2009



I had tested and recorded video long time back but could not convert it and load it because of some my Codec problems in my laptop. downloaded the latest codec K Lite full version and now I could convert and load it.

For testing the Motor I used a 7 x4 Pusher Prop since I wanted to measure the the thrust also.

I have mounted the Prop pushing the air away and with a digital scale which is tared to be zero with the complete set up, placed on top of it. I am measuring the Thrust approximately by the weight of thrust.

Watch the video please

« Last Edit: July 22, 2011, 11:54:13 AM by sundaramvelar » Logged

 

Read
« Reply #82 on: July 21, 2011, 10:44:45 PM »
sundaram
FAN OF FPV FLYING, AERIAL PHOTOGRAPHY & MICRO RC
Plane Lover
Forum Hero

*****

Reputation Power: 38 
sundaram is working their way up.sundaram is working their way up.sundaram is working their way up.
Offline Offline

City: Gandhinagar
State: Gujarat
RC Skills: Advanced
Posts: 3407
Join Date: Nov, 2009



It gave a thrust of around 500 gms on full throttle with a 7 x 4 Pusher Prop consuming less than 15 Amps and less than 150 Watts. Should be able to try with 8x4 on a model for short burst of full throttle runs and bigger props with 2S Lipos
« Last Edit: July 22, 2011, 11:53:09 AM by sundaramvelar » Logged

 

Read
« Reply #83 on: July 28, 2011, 11:05:32 AM »
sundaram
FAN OF FPV FLYING, AERIAL PHOTOGRAPHY & MICRO RC
Plane Lover
Forum Hero

*****

Reputation Power: 38 
sundaram is working their way up.sundaram is working their way up.sundaram is working their way up.
Offline Offline

City: Gandhinagar
State: Gujarat
RC Skills: Advanced
Posts: 3407
Join Date: Nov, 2009



Now for an example of ABC winding. I have chosen a really micro 9 pole motor with 12 Magnet.

This was a motor which I bought from ebay, this is a three grams micro brushless. It came damaged in transit with supply wire entwined with shaft and was not freely rotating.

Now I plan to revive it. It had 16 turns per pole. It was 7000 KV 1S motor.

Some photo graphs of dissembled motor. Lucky that my Dell streak is able to take really!! closeup photographs. When rewinding I need to work under magnifying glass for this motor.

IMG_20110727_193356.jpg
Re: Can this BLDC motor be repaired?
* IMG_20110727_193356.jpg (38.93 KB, 800x600 - viewed 1156 times.)
This post has 3 more images(s)/attachment(s). Please login or register to view them.
Logged

 

Read
« Reply #84 on: November 03, 2011, 11:28:12 AM »
SunLikeStar
Forum Administrator
Forum Hero

*****

Reputation Power: 20 
SunLikeStar barely matters.SunLikeStar barely matters.
Offline Offline

City: Pune
State: Maharashtra
RC Skills: Intermediate
Posts: 1902
Join Date: Aug, 2010

High spirits we have: gravity we flout.



I'm thinking about rewind my 3536 motor. I've never done anything like this before and looking forward to some DIY fun Smiley So what kind of wire should i get, what is it called? Any chance of finding it around the block (eg: in repair shops) or will i have to hit the electronics market Huh?
Logged
 

Read
« Reply #85 on: November 03, 2011, 03:04:21 PM »
sundaram
FAN OF FPV FLYING, AERIAL PHOTOGRAPHY & MICRO RC
Plane Lover
Forum Hero

*****

Reputation Power: 38 
sundaram is working their way up.sundaram is working their way up.sundaram is working their way up.
Offline Offline

City: Gandhinagar
State: Gujarat
RC Skills: Advanced
Posts: 3407
Join Date: Nov, 2009



Electronics Bazaar is the right to place ask for enamel insulated Copper Wire. Avoid Enamel insulated Alluminium wires. Any Transformer/ motor rewinding chaps will be having it. What is used for transformer low voltage side windings and for field coil of motors is the right bet. They are available in varying gauges. It would be best to take the sample of wire already wound in your BLDC for obtaining the enamel insulated wire.
 
Logged

 

Read
« Reply #86 on: November 03, 2011, 03:10:22 PM »
SunLikeStar
Forum Administrator
Forum Hero

*****

Reputation Power: 20 
SunLikeStar barely matters.SunLikeStar barely matters.
Offline Offline

City: Pune
State: Maharashtra
RC Skills: Intermediate
Posts: 1902
Join Date: Aug, 2010

High spirits we have: gravity we flout.



ok. thanks for the tips Thumbs Up
Logged
 

Read
« Reply #87 on: November 03, 2011, 04:46:03 PM »
controlflyer
Heli Lover
Forum Hero

*****

Reputation Power: 10 
controlflyer has no influence.
Offline Offline

City: Panaji
State: Goa
RC Skills: Intermediate
Posts: 848
Join Date: Jul, 2010

when I am sober my heli is drunk..



this is a easy task, if you have the interest, take sample wires to your local electronic shop and tell him to give you the winding roll for that wire diameter. Before you unwind the motor, carefully keep a count of your turns.
It will work!

Regards,

CF.
Logged

Money flies when the transmitter is ON...
 

Read
« Reply #88 on: November 09, 2011, 10:35:59 AM »
manojswizera
Plane Lover
Forum Hero

*****

Reputation Power: 18 
manojswizera has no influence.
Offline Offline

City: AURANGABAD
State: Maharashtra
RC Skills: Beginner
Posts: 1336
Join Date: Oct, 2011



Hi , Sundram sir thanks for sharing wonderful knowledge with us all. Salute  Your knowledge encouraged me to again try rewinding my brushless. I trieda 3 times before, following you-tube videos, but no success. I tried your ABC system this time and guess what it worked..   Grin
my brushless is with 6 magnets and 9 poles. RPM was 3100 with factory settings . 
I didnt remember how was the factory winding. But now its rpm has incresed as seen pratically ( no instrument with me to know RPM )
 Now it is not moving 8'' prop, making sound, but moves 7''DD prop well. Why so Huh? Head Scratching
I wind it with 7 turns with 26 gauge (approx), as beyond 7 were not possible, overcrowded. What i can do to increase torque.
 Prior i used 9'' prop before it damaged.   Attaching my brushless pics after winding.

08112011305.jpg
Re: Can this BLDC motor be repaired?
* 08112011305.jpg (48.12 KB, 800x600 - viewed 663 times.)
This post has 3 more images(s)/attachment(s). Please login or register to view them.
Logged

Russ-40 Trainer, Mr.moss, Pushler, Skysurfer, Mugi , F-22, Red swan, Xtra-300, redfury, flying mantaray.
 

Read
« Reply #89 on: November 09, 2011, 11:23:55 AM »
SunLikeStar
Forum Administrator
Forum Hero

*****

Reputation Power: 20 
SunLikeStar barely matters.SunLikeStar barely matters.
Offline Offline

City: Pune
State: Maharashtra
RC Skills: Intermediate
Posts: 1902
Join Date: Aug, 2010

High spirits we have: gravity we flout.



You'll have to increase number of turns to increase torque, how many turns did the motor had before?
Logged
 

Read
« Reply #90 on: November 09, 2011, 05:26:37 PM »
sundaram
FAN OF FPV FLYING, AERIAL PHOTOGRAPHY & MICRO RC
Plane Lover
Forum Hero

*****

Reputation Power: 38 
sundaram is working their way up.sundaram is working their way up.sundaram is working their way up.
Offline Offline

City: Gandhinagar
State: Gujarat
RC Skills: Advanced
Posts: 3407
Join Date: Nov, 2009



Your is a 6 Magnet, 9 Pole Motor which is basically designed for High KV more than 2500, unlike a 12 magnet 9 Pole Motor which is designed for KV less than 2500.

It is better you use the same 7 turns per pole configuration for full efficiency, with smaller props for a high speed plane.

It is not advisable to use a Larger prop for a high KV motor. I wonder How you were able to use a 9 inch prop earlier for a 3100 KV motor.  Head Scratching

Like what sunlikestar has said if you use more number of turns per pole with thinner gauge wire then your KV will reduce and Torque will increase, but your being a 6 Magnet Motor it is not desirable to reduce KV very much since it is basically designed for High KV.
Logged

 

Read
« Reply #91 on: November 10, 2011, 09:44:08 AM »
manojswizera
Plane Lover
Forum Hero

*****

Reputation Power: 18 
manojswizera has no influence.
Offline Offline

City: AURANGABAD
State: Maharashtra
RC Skills: Beginner
Posts: 1336
Join Date: Oct, 2011



Sundaram sir, but can u give me a idea, how much amp it is drawing from my lipo. And which Amp ESC will be suitable for it, lipo capacity ? What could be the thrust approx
« Last Edit: November 10, 2011, 10:07:52 AM by swizera » Logged

Russ-40 Trainer, Mr.moss, Pushler, Skysurfer, Mugi , F-22, Red swan, Xtra-300, redfury, flying mantaray.
 

Read
« Reply #92 on: November 10, 2011, 06:56:34 PM »
sundaram
FAN OF FPV FLYING, AERIAL PHOTOGRAPHY & MICRO RC
Plane Lover
Forum Hero

*****

Reputation Power: 38 
sundaram is working their way up.sundaram is working their way up.sundaram is working their way up.
Offline Offline

City: Gandhinagar
State: Gujarat
RC Skills: Advanced
Posts: 3407
Join Date: Nov, 2009



Watt meter is a best choice for it, since Amp drawn and thrust are all dependent on various factors. prop size, pitch of prop, static and dynamic, voltage applied, motor size, length of winding, no of turns per pole, thickness of wire, capacity of ESC used and many more.
Logged

 

Read
« Reply #93 on: December 11, 2011, 12:04:42 AM »
SunLikeStar
Forum Administrator
Forum Hero

*****

Reputation Power: 20 
SunLikeStar barely matters.SunLikeStar barely matters.
Offline Offline

City: Pune
State: Maharashtra
RC Skills: Intermediate
Posts: 1902
Join Date: Aug, 2010

High spirits we have: gravity we flout.



I've finished winding using this image posted earlier in the thread, now i'm totally confused which ends to join  Bang Head i forgot which end is the starting point Help Me  

w1.jpg
Re: Can this BLDC motor be repaired?
* w1.jpg (74.5 KB, 800x600 - viewed 650 times.)
This post has 1 more images(s)/attachment(s). Please login or register to view them.
Logged
 

Read
« Reply #94 on: December 15, 2011, 10:57:13 PM »
SunLikeStar
Forum Administrator
Forum Hero

*****

Reputation Power: 20 
SunLikeStar barely matters.SunLikeStar barely matters.
Offline Offline

City: Pune
State: Maharashtra
RC Skills: Intermediate
Posts: 1902
Join Date: Aug, 2010

High spirits we have: gravity we flout.



Just finished my motor and its alive now Smiley Have not measure amp draw and kv yet but its looking good.
I just twisted adjacent wires where you started is not important; got this tip from here a 5:30
« Last Edit: December 16, 2011, 12:18:35 PM by SunLikeStar » Logged
 

Read
« Reply #95 on: December 15, 2011, 11:18:20 PM »
pawankhedkar
Plane Lover
Active Member

**

Reputation Power: 1 
pawankhedkar has no influence.
Offline Offline

City: Nagpur
State: Maharashtra
RC Skills: Beginner
Posts: 3
Join Date: Dec, 2011



 Salute
Logged
 

Read
« Reply #96 on: February 19, 2012, 03:40:31 PM »
manojswizera
Plane Lover
Forum Hero

*****

Reputation Power: 18 
manojswizera has no influence.
Offline Offline

City: AURANGABAD
State: Maharashtra
RC Skills: Beginner
Posts: 1336
Join Date: Oct, 2011



Can anyone tell me how to download the above video from vimeo.
Logged

Russ-40 Trainer, Mr.moss, Pushler, Skysurfer, Mugi , F-22, Red swan, Xtra-300, redfury, flying mantaray.
 

Read
« Reply #97 on: February 19, 2012, 04:05:48 PM »
KALYANPRODHAN
Global Moderator
Forum Hero

*****

Reputation Power: 17 
KALYANPRODHAN has no influence.
Offline Offline

City: Kolkata
State: West Bengal
RC Skills: Intermediate
Posts: 1584
Join Date: Jul, 2010

Information sharing improves knowledge of both.



I use downloadhelper plugin in firefox with FDM.
While playing any movie, downloadhelper gives me the option for download.
And if different varient available, I get options which one to download too.
Just try, it's easy.

And if you want to edit or convert, just use K-Lite mega codec pack and TMPGExp Portable.

Thanks
Logged

We have to unite and to prove ourself to make indigenous products as well as marketing / Canvasing them. I'm sure we must achieve success if we try unitedly.
 

Read
« Reply #98 on: February 19, 2012, 04:10:41 PM »
SunLikeStar
Forum Administrator
Forum Hero

*****

Reputation Power: 20 
SunLikeStar barely matters.SunLikeStar barely matters.
Offline Offline

City: Pune
State: Maharashtra
RC Skills: Intermediate
Posts: 1902
Join Date: Aug, 2010

High spirits we have: gravity we flout.



Can anyone tell me how to download the above video from vimeo.
Try this http://keepvid.com/ fast and simple Thumbs Up
Logged
 

Read
« Reply #99 on: February 19, 2012, 05:25:56 PM »
manojswizera
Plane Lover
Forum Hero

*****

Reputation Power: 18 
manojswizera has no influence.
Offline Offline

City: AURANGABAD
State: Maharashtra
RC Skills: Beginner
Posts: 1336
Join Date: Oct, 2011



Thanks Friends..... Clap
Logged

Russ-40 Trainer, Mr.moss, Pushler, Skysurfer, Mugi , F-22, Red swan, Xtra-300, redfury, flying mantaray.
 

Pages: 1 2 3 [4] 5   Go Up
Jump to:  

Related Topics
Subject Started by Replies Views Last post
1800kv bldc motor required
For Sale
dhrupad 4 3207 Last post July 26, 2013, 09:41:03 PM
by Rahulvyas
BLDC motor 110,000 rpm
Wanted
MohitJindal 10 5880 Last post March 20, 2015, 10:47:47 PM
by tantragna
Refurbished bldc motor.
RC General Topics
sumit joshi 0 1375 Last post December 06, 2015, 03:45:12 PM
by sumit joshi
BLDC motor issue
Multirotors
r3ap3r 4 2456 Last post December 16, 2015, 08:28:38 PM
by r3ap3r
850 Watt BLDC MOTOR E-Rickshaw Motor, Controller, Harness & Convertor for Sale
For Sale
shadowsfromthemist 6 5076 Last post July 05, 2016, 09:48:41 AM
by shadowsfromthemist