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« Reply #100 on: February 19, 2012, 10:17:51 PM »
roopeshkrishna
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Sundaram Sir..it was a great sharing of knowledge, and actually, by mind i was sitting in front of you, on a bench, with desk, as in my academic years..as you mentioned, from my modeling life i never thrown out any motors as lost, and even now working on new 3, as brushed, and two as ECMs..as i am more intertested in ship and boat modeling, i usually rewinds all motors with more windings with thin guage wires..and yes, was inspiring and immensly valuable..a million thanks for the effort to teach us the step by step procedures..a million salute.. Salute Salute Salute Hats Off
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« Reply #101 on: February 20, 2012, 06:00:36 PM »
rahulkhedkar
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Hey plz can you send me the information to how to rewind bldc motor ........thanks.....
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« Reply #102 on: February 20, 2012, 07:37:24 PM »
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Rahul plz read this entire post from the first page, every thing about rewinding is explained here within.  Smiley
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« Reply #103 on: February 20, 2012, 08:21:44 PM »
roopeshkrishna
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its too easy to rework on any motors..may be a brushed or brush less..i got lots of motors from various sources, and now rewinding all for my needs..you can see here is a heavy motor rated at 12 Volts and 15 Amps..but later i reworked 3 of them to 12 volts 1.5 Amps..and about 4000 RPM..cool..

we can buy, or collect needed SWG wires from any electronic spare dealers..make sure it is all good HD copper..

MCM-2.jpg
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« Reply #104 on: February 20, 2012, 08:27:23 PM »
roopeshkrishna
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this motor was in 1000 RPM/Volt, and rated at 9 Amps, at 11.1 Volts. i lost it's three poles, in a crash..and rewinded it for my specs for ship modeling. so, my need is less RPM, with comparatively great torque. you can see here how easy to rewind a motor, to our needs..

ECM-1.jpg
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« Reply #105 on: February 20, 2012, 08:33:01 PM »
roopeshkrishna
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you can see the rewindings..here as all according to my needs..i took about 20 minutes to wind it all tightly..

after insulating installed the rotor..

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« Reply #106 on: February 20, 2012, 08:41:47 PM »
roopeshkrishna
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you can see, previously, this motor no load current was 1.8 Amps..but after reworks, it takes only a mere 520 mAmps..at 12 volts..

and even at stall load with fingers it is only about 800 to 900 mAmps..so,? hours of running time for boats and ships..but with all needed power ratios..ample os woooms...so, please do not throw away your burned motors..may be MCM or ECMs..if you are going to discare..please give it to me.. Giggle

i once again saying a million thanks to sundaram sir, for the greatly detailed drwings of various configurations, of ECMs..even a child can follow..Sir..a million salute for your encouragements.. Salute

have you all some nice reworked motors..try it..all easy..

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« Reply #107 on: May 30, 2012, 06:45:17 PM »
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i got this micro motor from one of the respected Member of RCI, as damaged.. the winding was damaged and was far beyond recovery.. and at beginning i was not much interested because of its size..  but after rework, it showed its mettle.. and so happy that to make a simply fly with a span of 24 inch..
cleaning the web was some hard work as the company was using a tight insulation coating on it.. but with some patience cleanned well.. and ready for rework..

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« Reply #108 on: May 30, 2012, 06:48:02 PM »
roopeshkrishna
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after full cleaning started winding.. used 26 SWG instead of 24 original.. more RPM..and yes in to STAR.. more torque..

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« Reply #109 on: May 30, 2012, 06:52:22 PM »
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you can see how simple is to rework.. its now ready for the test..

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« Reply #110 on: May 30, 2012, 07:03:31 PM »
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once completed.. oh my GOD.. i amazed with its immense power.. at 7.4 volts she hauled a 5X4 prop with ease for long time test without any fail or over heating.. !!  so time to make a good plane of its class..  here once again.. reworking a BLDC motor is quite easy.. try it.. rework it.. and RCyit..  Thumbs Up

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« Reply #111 on: September 26, 2015, 09:58:49 AM »
sundaram
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Interesting video on how to mechanically control speed of brushless without the use of ESC

www.facebook.com/EngenhariaEletricaEletronica/videos/1031341783576854
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