Ilusys Systems - 2017-05-19
Test of coil that is very simple to manufacture for use in axial motors Watch 3 phase version of this coil: https://www.youtube.com/watch?v=SvxFdLKZU-8 Measuring efficiency: https://www.youtube.com/watch?v=jwShvqoZX_c Entire playlist: https://www.youtube.com/playlist?list=PLyzlj5IaDE0fsTsjA6JsrlD7aiknbGU9K Sample drawing: https://drive.google.com/drive/folders/0BxYcrZZwfNmmZzM1UW5NcFZjVGM?resourcekey=0-yjOYJDHzMveKdFWUzb-ZvQ&usp=sharing
How many copper strands did you use? And does how many strands affect torque and rpm? What voltage was you running it on? Excellent work!
This kind of reminds me a bit of that time i made a BLDC driver for DVD spindle motors and spun them so fast that the bushings welded to the shaft. No amount of lubrication would save them. :D
In then end my power supply didn't have enough power to make the motors spin even faster but the speeds were absolutely ridiculous and the gyroscopic effects were as well.
Thank you for the video! I was able to recreate it very easily!
That's incredible
How is the circuit to which the coil is connected? And about how many turns does the coil have?
Some designs use more magnets than coils, but in your design, there are equal number of magnets (magnets align perfectly with wires). How do you decide how many magnets to be put in rotor?
how good do these coils work compared to regular builds? I'm thinking of making a generator using this coil type.
it depends on what the regular build is :)
typical commercial motors have 90-99% efficiency if used right.
i guess, that worst case for commercial BLDC motors used in RC community would be 60-80% if abused, but not really hard...
in my last test this motor had 45% efficiency.
to improve this, you can add more phases, or use more dense configuration of magnets (thinner bar magnets), or pulse the power only when it is most efficient(reduces power).
axial motors are compromise between power density and efficiency, but design is very simple and low cost.
I don't think this would be cost efficient generator in long run. for experiments it's pretty OK
Okay, I see how the single coil can function as several coils with the polarity reversed from one loop to the next. What I don't see is how commutation is achieved. The motor should cog to a stop immediately, if DC is simply applied directly to the coil. I must be missing something here.
I can also see why it is not very efficient, in terms of watts in / watts out, but if light weight is more important than efficiency of energy conversion, it is ingenious. Nice work.
Hi, commutation is done by PC fan. So this is AC motor.
You can look at my playlist if you are interested.
Driver is explained a little bit in first video of this series.
And in last video I have more efficient 3 phase version driven by RC plane motor controller
Great i have a similar design like this one i did it couse it is tge way earth works 👏👏🤝
Dude you are hysterical! I use the exact same method as you. I just wing it! You literally had me laughing out loud!
Really cool! What did you use for a power supply? Also where could we find that template?
Ilusys Systems does the system heat up from such a high wattage through such thin coils because i can only put like 3v 15 milli amps through such thin coils it melted after a few minutes
Wow. There is no way such low power would melt hardly any plastic piece bigger than quarter coin.
3V * 0.015A = cca 1/20W. Imagine size of 1/4W resistor...
I am using 0.5mm dia. wire. I wouldn't call it thin. It can handle probably 10A @ 12V with some self cooling continuously say at 1000RPM - obviously the more RPMs, the better cooling if you don't use independent cooling.
Maybe you are measuring something wrong(meter range in mA while probe in 10A hole)?
Also I would recommend building 3phase version of this motor @ https://www.youtube.com/watch?v=SvxFdLKZU-8
Ilusys Systems my meter is old ill go get a new one soon. and the wire i use is so thin it melts with a heat radiated off of a lighter i do all kinds of crazy things on my channel
yeah, that's thin :)
with thin wire it's best to use high voltage and low current. but you also have to make a lot of more turns
anyway, wish you good luck :)
Ilusys Systems ok thanks for the advice also i subed
Air core motors are easy. Iron cores are powerful. Cogging and eddy currents figure in too. Your video is amusing. Good work.
Can someone tell me what will happen if I increase the number of winding in 3 phase generator's stator...
How will it affect the output, will the output voltage, power increase?
Increase of number of turns means more voltage.
Increase of wire dia means more Amps.
Increase of weight of copper means more power.
Молодец, настоящий брашлес
Isn't more energy generated by putting induced by both sides of the magnets?
Energy isn't generated :) I guess you meant power density - in that case you can do that, but it is easier for me to close magnetic field by having 2 plates with magnets.
What kind of magnets did you use?
I believe it was neo 18x3 mm as I got good deal on this size. The thiccer the better :)
Ему бы еще геркону или датчик холла для запуска и увеличения кпд.
What controller or amplifier you are using ?Does you directly give 12 volt supply to the coil
It's simple H bridge with hall sensor, there are more details in later videos I made
good works on your bldc multiple flat coil do you used bldc controller
What kind of mold did you use for the epoxy?
Molds are quite problematic... I tend to use random circular objects wrapped with tape around, and use hot melt glue to copy circle. Not great though...
In this case I may used a pvc hose + hot melt glue
@Ilusys Systems That's a good way of doing it, I'm kind of new to motors but I was wondering what you connected the two copper wires to for the output?
Wait nevermind I see now, thanks man
I am curious about the magnet layout is it + - + - + - +
how many mm copper wire did you use
in this case about 0.3mm
With PWM driver I used 0.75mm wire and ~12 turns.
Can this thing be used as a Brake for wind turbine through a PCB to slow down magnet rotor spin when winds are blowing at high speed ? PCB can be programmed in such a way to activate voltage when high wind is detected through a wind sensor ?
What power do you give..... .. i mean home electric...or..... from battery.... i mean dc or ac... this is my second comment.. coj i am interest in this....... the winding pattern is easy........ for begginners
~250W power supplied by ATX PC PSU @12V
https://www.youtube.com/watch?v=TAFDX301Qrk for driver (3-phase). this motor is single phase, which is not that great
nice video friend......1st of all sorry for my broken english writing,,,,anyways i m new in this field,want to know abt dat i have a berger lahr stepper motor,as i turn it with finger shows near abt dc 5.00 and ac 200 ,,,,,,,,cos i cant read the current value of the motor ....can i use it for a small wind turbine???but as attach it with some load its get very hard to turn......thanx any suggestions
Hi, that is the nature of all motors/generators. When you apply load, you have to provide more curent / when you need more current, you need to provide more force.
Personally I would not use stepper as it tends to create huge voltage at lower current normally - it would be beneficial to charge some 30V battery and then step down to provide higher currents.
it also has holding force, that you have to overcome to start not quite smooth rotation. when rotation is not smooth, this holding force will play effect here. You also can not get rid of it, because it is a result of motor construction.
Merry christmas! This is single phase motor? Can it be self - starting? This is sensorless design or with hall type sensor? I want to use same type of design to direct drive of turntable for my LP records. in i need slow speed rotation 33 1/3 rpm with high stability. Sorry my bad English
in 3 phase design you can use rc style driver, that would work. i have made 3phase version with this coil so you can have a look on that
I tried to make my own but for some reason it is not producing electricity when I spin it, I'm thinking it's the positive and negative wire, how do you connect them? I'm new to electronics
This is synchronous AC motor. this means that when run as generator it will output AC (alternating current) at a frequency directly proportional to rotor speed.
Either switch your meter to AC or use full bridge rectifier with 1-phase generator.
@Ilusys Systems ahh i was going to use it as a water generator, but to store the energy in a battery I would have to convert this to dc with a rectifier?
Short answer: yes.
Less short: Diodes and rectifiers do have a voltage drop (0.8 - 0.5V) that will result in small, but power loss.
Using schottky diodes you can achieve smaller voltage drop (~0.1V).
Using motor driver in breaking mode can result in even lower voltage drop, but will require rather complex electronics, that increases cost and consumes some power themselves.
👍👍
Can this motor also work as generator
Sure, all motors can.
Nice to meet you
My name is Rokumi Toi from Osaka, Japan.
I want to make a motor and see how many times the coil is wound?
I would appreciate it if you could tell me.
good works on your bldc multiple flat coil do you used bldc controller
this is 1 phase motor, so the driver is like CPU fan driver, just powerful.
cool !!!
nice design. would it be better with some metal or ferite cores?
@Tim ferrite may help, but you generally want highest possible permeability.
@Ilusys Systems oi
@Ilusys Systems You may want to see the bldc motor i built. I used iron (steel banding) in my stator to reduce the number of turns on my coils. This allowed me to have a very thin and flat arangement of three coils in my stator.
My motor is an axial flux bldc motor, with a slotless iron core,
Judging by sound, my motor has very little torque ripple. But in all fairness the motor uses 3 phase but my stator's iron, being slotless, does not cause iron "cogging" jerking.
Just turning it on the motor controller at its lowest setting, causes my motor to spin at about 1800 rpm when fed 1.49vac.
@Keith Reynolds also got 3-phase build, was thinking about using iron filings as epoxy filler - may be interesting
@Ilusys Systems i had considered the same thing. But wondered about using nono sized magnetite (fe3o4) for their superparamagnetic/low coercivity properties.
I built an electrolizer with iron electrodes. I used sodium chloride as the electrolyte. And made my own magnetic stirrer from a cpu fan with magnets attached and a computer power supply for power. Then for my stir bar, i used milk jugs pieces (hdpe) melted in my oven inside a soup can. I dropped in a piece of iron and more hdpe. After that was melted i pulled it out of my oven, let it cool, and cut away a lot of the excess hdpe till i had a nice stir bar. Stirring is suppose to keep the particles from aggregating into bigger ones.
I was able to make something that looked like magnetite (black and atrqcted to magnets), but i think i was unable to remove the all the salts because next day it look lik rust red mud. Probably fe2o3. I will revisit this one day.
Could you run this in reverse for electrical generation? If so what would be the efficiency
@Neill Coetzer Yes you can stack rotors with this system, which is quite nice.
No need for fancy switching or anything like that really, just align rotors and wire stators in parallel. if you don't want to deal with consistency, you would need switching though, or just rectification at least
@Neill Coetzer Thanks, I have more videos where I have "improved" design a bit, calculated efficiency and tried to use it as servo motor which was ...meh... :) anyway, good luck with getting off grid!
@Ilusys Systems ooooo I'll definitely look into that then since that sounds pretty good
@Ilusys Systems yeah thats exactly what I was thinking about. Really cool system
@Ilusys Systems looking forward to seeing them. Hehehe thanks man, hope it'll happen
why sisnt you use metal washers as cores for coils ?
you can, I was thinking of using magnetic steel shavings as epoxy filler. But, what you get is higher torque at lower speed so power is constant. efficiency likely too if design is good.
How are you driving this motor with AC?
Hall sensor..
Ahaha....... you always start roting with your hand first...
But there are many people who make rotor without starting roting in hand.... bro make motor that can carry 100 weight
It doesn't need ESC right? or motor controller whatever you called. I can see only 2 ended of wire in this case you use pulse?
In theory you could do it, but in practice you need to control it.
Driver and principle is same as in PC fan motor. it is only a bit scaled and flattened..
nice thank,s
how much turns and gauge of 1kw motor
waiting for your answer
No explicas cuántos voltios , y que tipo de corriente .
Interesting Mr Ilusys, How you organised magnets, are they NSNS or NNN or SSS ?
also can y ou please share the driver making video as well?
It is NSNS. I will make that video. I just need about 2 weeks...
So nice of you dear, quick response makes me feel elated, will wait for your video, god bless
can we use this type of coil for single phase axial flux alternator
Should be OK to do so...
Yes
haha when he IP68ed that coil whit that glue thing. Hell, i guess its will pass the IP69K test for sure
❤️
I like it u are ids
Mujhy pasand aya apka triqa
COOL!!! LIKE
Thanks!
So it's a monophase generator right ?
yes.
You can use more coils to have more phases.
good Job
thx
8s it ac or dc
I AM Slade - 2021-12-23
Thank you for your work and for making these videos, you helped me a lot. I have just started with the axial flux motor. I have built a couple of different ones but this is very cool.