How To Make A Brushless DC Motor | DIY BLDC Motor

[@miki9516]

One of the best and smallest 3D motor i've seen. Back in the day flite test received a 3D printed motor but much bigger and after some pull it burn out. Hope to see some testing from you

[@_-JohnDoe-_]

reasons for lack of independent start: 1. there should be no gaps between adjacent magnets; 2. incorrect ratio of the number of windings and magnets. arc magnets are produced, that are better integrated into the BLDC case (both vertical/cylindrical and flat sectors with surface, not end polarization..as a rule, the number of magnets is even, then, number of windings should be smaller or greater than magnets by 2, but multiple of 3).

[@spiderunderyourbed6893]

Thanks for sharing the files!

[@Mau_DelS]

most of the factory brushless motor nowadays has 14 magnet more closely eachother so it may be the case why your need a little push to start. you may want to try printing one that way it should improve it, very nice project!

[@HMProjects]

Yes the magnets spacing may be a reason that the motor it doesn't self start, and another reason can be the combination between pole/slot, maybe with 14 pole and 12 slot as you said it will perform better, but the main reason is that it's lacks the laminated steel stator, I could use a stator from an old brushless motor but then wouldn't be "fully" 3D printed motor. Probably I try to improve this motor even if it doesn't have a practical use. Thanks for your comment!

[@nimgog]

@@HMProjects would it make a difference if the stator would be electroplated? I mean, would that be a viable option when creating this?

[@Brohi-i5n]

Great detailed video explained each and every thing. One thing more other than this video subject, can you share specifications regarding 3D printer that was used in this video. Thanks

[@mb-bq1mi]

what were your sources about learning all of this? i was wondering stuff like how you decided on the number and size of each magnet, number of turns of copper per slots etc...

[@ericon.7015]

very nice I really liked your project. I was wondering a evolution of your motor: instead of glueing the magnets make a slight shorter in height stator, then in the rotor you could use the extra length to have a small cavity, in top and another on the bottom where it holds a small portion at the top and the bottom of each magnet. So you will keep them in place mechanically. It will save time gluing each one of the magnets and also your fingers 😅

[@HMProjects]

I would not risk to run the motor at high rpm without gluing the magnets, unless I want to see how hard those magnets hit something 😄.

[@abdelaleem4026]

Amazing! Did you have your own ESC to run the motor? Could you make a video about how to program one of those?

[@adrasx6999]

I like you're motor, it can't wait to disintegrate, yet it purrs like a cat :)

[@HMProjects]

I already mentioned in the video how dangerous it is to run it at high rpm, in the video I run at half of the speed or less. thanks for your comment!

[@bdlightner]

Looks like a clever design. What did you use as a BLDC motor controller and what is the voltage being used to drive the motor? I did not find that information in you video or in your link. Seems important! 😎

[@vijayanand8818]

the motor was really good 😍. I want to prepare like that can I get the calculations for that sir?

[@HMProjects]

All you need is in the link in the description, I forgot to mention that the magnets have a size of 10x5x2 mm.

[@giovanni7467]

@@HMProjects You have mentioned it in the video

[@HMProjects]

​well, I forgot to mention that I mentioned that in the video 😅

[@D2CreativeDIY]

good job, bro!!

[@saulwarren9611]

Was the CAD or software to design the parts come with your 3d printer? if not what's it called?

[@HMProjects]

@@saulwarren9611 No, the CAD program I used to design the parts is called FreeCAD.

[@inhtran4750]

Have you faced overheat situation?

[@MAHESH-zu9ic]

Sir I have one doubt about the rotor in this type of bldc motor.that as the rotor is rotating at very high speed does by any chance it will ever come out of stator because it is open from below.please tell because I'm very confused.

[@HMProjects]

There is no chance that the rotor will come out from stator, the shaft has a safety washer that will hold the rotor from coming out 3:15 , in fact there are more chances that the rotor at very high speed will break due to centrifugal forces.

[@jaydenjegachandran557]

what did you use it for?

[@ali35j]

What magnets are you using?

[@voornaamachternaam1943]

how long does it run at max RPM before it melts?

[@HeshamMohamed-xl1lv]

What is the number of turns for the coil?

[@junrukong-tn1uk]

What is the size of the brass inserts?like m3 *3*4 tks

[@junrukong-tn1uk]

and what type of battery and controller do I need to use to drive it？

[@HMProjects]

​@@junrukong-tn1ukIf I remember correctly the inserts I used are M3, 4x5mm, to control the motor I used ESC in combination a tester for rc servos.

[@hasithamihiranga799]

good

[@HMProjects]

Thanks!

[@mohamedmustafa-pd9wb]

Please, I want the file😊

[@HMProjects]

Everything you need is in the video description.

[@MaxQ10001]

No ferro in the stator? That must decrease the power to almost zero? Have you measured it?

[@HMProjects]

Hot to zero, but definitely it has a lower torque, anyway this has no practical purpose, I build it for fun and learn something new a long the way.

[@MaxQ10001]

@@HMProjects I understand 😊 It would be nice to do measurements any research to find out if it's possible to make a practical motor without ferro core, both due to weight, and to make it 3D printable (probably using nylon to make it more heat resistant). I would guess a radial axis motor would work better without a metal core?

[@حمديالعزعزي-ه2ح]

What is the name of the program that uses this?

[@elvenOseven]

FreeCAD

[@rocketboyjv5474]

But what torque?

[@HMProjects]

Not sure, I didn't make the calculation.

[@The_Privateer]

Electric motors generate heat, especially under load. Not to mention very high centrifugal forces when running at high RPM. I guess you dont realize the the majority of the magnetic force generated by the stator coils is due to them being wound around (laminated) steel cores. Not non-ferrous plastic. That being said, why would you even bother with plastic (3D printed, no less) as the construction material? This motor has the usefulness and durability of... well... a desk paperweight.

[@miki9516]

To answer. Why not?

[@HMProjects]

I know how electric motor works, I already mentioned in the video that the lack of the laminated steel core will affect the motor performance and of coarse how dangerous it is to run this motor at high rpm, being 3D printed this motor has no practical use, is only for educational purposes you shouldn't have much expectations from it.