I've watched another channel that did experiments with hoverboard wheels but he used water instead of wind as it was much more stable when available. I saw one video where he was getting almost 60 volts and 3 amps. Experiments are a blast and turning that into practical application is even better. Love your stuff.
from my small scale testing(sample size of one each) it appears that an e scooter motor is actually a better generator than a hoverboard motor I tested them on a makeshift hometrainer with a bicycle, the limiting factor in this case is the human pushing the pedals and friction between the motor and the rubber tire. From the scooter motor I got a maximum of a little over 200W hooked up directly to a 12V battery, the hoverboard motor generated 90 watts, but with significantly more effort needed and the tire was also slipping a lot, even after adjusting the tension to the point where the resistance without load was not insignificant I couldn't make it grip properly
Hi there. Love watching your video"s. You explain thing in a way that anybody can understand what you are doing and making. All the best from Cape Town, South Africa!
Missouri Wind and Solar recommends minimum height of 65 feet and 7 blades. His RUclips video “Missouri Wind and Solar Where not to install a wind turbine” has a very compelling arguments to justify his recommendations.
there are always compelling arguments to justify a position mate - but he is probably right - if you want a wind turbine you have to stick it in the wind
Cool man. You should try to hook it up to a controller with regenerating breaking. Then I think you would get a lot more energy output. I love these hooverboard motors. Have build several kick scooters with them 🤓👍
Rob, I’d be curious to see what would happen if your snapped off all the metal cores from the stator to see if it would pickup more speed and what the output would be? Equivalent? More? Less?
all the electronics are external to the motor with the exception of the sensors - and it would produce 5-10 amps at 18-30 volts if it was spinning fast enough - the problem here is it just wasn't spinning fast enough to produce much
Regardless of output you have to admit that was a very cool looking wind turbine. I wonder what the limit is for the length of the blades before they start becoming counter productive.
My plan was to use a motor from an hoverboard for a Vertical Wind Turbine build (maybe a Daisy build instead :) ) to compliment solar panels for charging 24v batteries. However, following this build, it will not work as it requires to much turning speed... Any suggestions for an turbine suitable for a small Vertical Wind Turbine, targeting 24 v and 200-400W? Today I have average wind speeds about 2 m/s.
If you can gear up the revolutions then the speed is not a problem with vertical turbine either. I have supplies for double oil drum savoniuses, stacking them and rising four meters from ground on field. Have couple of hoverboard motors but unsure how to gear one up to spin it faster. Have you got your project going?
I made a little tester this weekend using some 200l blue water barrels, cut thin to wide in an ‘s’ bend, then alternated the tops and bottoms around two bike wheels independently fixed into a frame top and bottom. Two rotors in the frame side by side, one higher then the other, and mounted the motors underneath and above each turbine so I could run a belt from each to the other (about 3 metres length!) works out about 5:1 ratio by my rudimentary counting! Just a toy project at the minute, as I’ve never really built my own design before haha! Hoping to hinge the blades on the drag sides, hence to offset in blade position(high/low) to counteract the imbalance created. Turns pretty well in low winds, sadly missed the weekend storms! 😂
Hi Robert, your videos are fantastic. I have a question well 2 but linked, to charge a battery what exactly else would you need to charge and also you mentioned a rectifier could you enlighten how to make one and the wiring please. Now off to watch more.
You need a three phase rectifier that turns alternating current (AC) coming from those three wires into direct current (DC) in two wires. You can make one yourself using six diodes you can take from old appliances, old UPS's hold strong ones. Or you can order one from the 'net, couple of euros, maybe ten. Just connect three wires in and you got two wires with plus and minus. Use any search engine and study it a bit. Not hard at all. Now you've got DC capable of running and charging many devices but the voltage is here and there. If you go too high, you can damage delicate electronics. If you plan to charge something like 12,6V lithium batteries, best thing would be a buck converter. This is a bit more complex to make than bridge rectifier so ordering 300W capable one for 10€ is a no brainer. With that you can adjust steady output voltage and amps lithium batteries need. You need to remember that buck converters have an upper voltage limit so way too high voltage in can damage stuff. If you plan on charging lead acid batteries, just get yourself a charge controller and input the power from the buck converter. Some charge controllers take higher voltages in, then you don't need the buck converter. If you are new to electronics and some of this stuff seems alien, you can try charging smaller batteries, like phones and power banks first. Just get six diodes, twist them together and connect them on 12V/24V USB charger meant for car cigarette plug. Now you spin the three phase generator, rectify it in DC and convert it into 5V. 5V/9V/12V/15V/20V if your charger outputs it. 10€ car cigarette plug chargers have built-in buck converter, not as sturdy as a buck converter in the same prize but it works. Maybe monitor the input voltage coming in with a multimeter when connected on the charger, best not to get over 30V. Hope this helps. Please, try stuff and experiment. Worst thing you could do is fail and learn from your mistakes. Maybe fry some cheap electronics so don't plug your phone first in, check it with multimeter and try out with cheaper stuff.
Ive been thinking about using hoverboard motors. Not sure or totally convinced, but the could be a good source for harvesting the magnets fir a large diameter hallbach array ??
Necesitas un mínimo de 450rpm a casi 500rpm para cargar baterías de 12v a casi 4A! La intención de esas hélices está bien, pero es demasiado diámetro, mucho torque pero rara vez alcanzará ese rango , es mejor meter 5 alabes y que tenga menor diámetro para aumentar su giro angular. Aun así es un trabajo fantástico
Check out Thane Heinze's work on creating a delayed lens effect. Basically by using thin copper wire many turns for his coils when the RPM hit a certain threshold , the delay in the lens effect is great enough for the rotation speed to over come the effect. The magnet is pushed instead of repelled.
I would have thought that the specified power of the motor would be slightly more than the amount of power you should able to get out of it as a generator. It would be interesting to know the specs of some of these motors that you are using as generators.
We use gas bottles cut out with a grinder to make blades. First take fitting out, then turn bottle upside down to remove left over gas for couple of hours. Or use compressed air into bottle to remove left over gas. Good work guys. Now did you get to hoover boards? If so why not make the other in to a go cart Rob? Have a wonderful day.
What if you attached an impeller to the shaft of the motors and attached it to a 'little y' pvc connector in 2 'n-shaped' pvc siphons that feed each other water between 2 trash cans(or buckets) that can hold water. You could use 2 pvc t connectors placed at the top portion of each n shaped siphon and run pvc to a 'capital y' connector which connects to a valve. Then to start both siphons simultaneously you could use a wet/dry vaccum on the valve until both siphons start, then close the valve. The objective is to create 2 siphons facing opposite directions that feed water into the other perpetually, using trash cans as the water tanks, and then harnessing this 'perpetual' siphon with the motors attached to impellers on the 'little y' connector. Likely the water level cannot be even in each trash can when the siphons are started. If the perpetual siphons works then you get a situation where both motors are constantly turning and producing electricity. If this set up doesn't work than one that uses 2 self starting siphons could be tried in order to perpetually create a scenario where 1 self starting siphon siphons and 1 motor-impeller spins while the other motor-impeller is at rest until its respective self-starting siphon starts (so an alternating motor-impeller but still a constant supply of electricity). I got the motors, the pvc pipe set up, the trash cans, I just need the to find impellers that fit the shafts of the motors before I can test. Sorry if this seems crazy, but I've yet to see anyone try 2 siphons that feed each other and I can't think of a reason why wouldn't work(when the water levels of the 2 containers at the start are not even, if they are even then I'm not sure what will happen).
Great effort, unfortunately you botched the important bit. You need to rewire the star configuration of the coil inside the motor. Will produce much more power then.
Gravity is so weak though. You wouldn't be achieving a lot. I back of the enveloped once that you need to raise a house to the height of a house to store the same energy as a car battery.
Do you think removing some of the magnets on the outer ring of the motor will help it have less resistance when turning I was thinking about making a vertical one if they use but I'm worried about the resistance from the magnets
Brilliant as always Rob thanks. Just if you wouldn't mind I need to ask a none related question. Dose the length of a bog standed electric cable (ie extension cord) decrease the longer you run it from the power point? Hope you can help 🙏 . Thanks mate.
I think you used the wrong word (length)? If you meant to ask "does power output decrease the longer a cable is", then yes. I have an angle grinder that spins a little slower when using a 30m cable. Because the wire in the cable has resistance. So the longer a cable is, the greater the total resistance, so the more voltage is dropped across the cable, which in turn reduces total power output. e.g. If you have 100V in, but 80V out of a cable, you've obviously lost about 20% of the available voltage/current/power. Very generally speaking, doubling or halving cable length in turn doubles or halves resistance. So if for example you measured 10A output at the motor (where for calculation purposes you can assume you have zero ohms resistance), then you connect a 10m cable and get only 5A output, you could offset that loss somewhat by increasing cable thickness. In this example, since the loss is exactly half, you could assume (theoretically) that halving the cable length, or doubling cable thickness, would give you close to the original 10A output again. In the real world you probably won't achieve the full 10A at the output. But it does give you a realistic target for cable length or thickness, because increasing thickness any more than x2 probably won't have much if any further gain. i.e. You might double cable thickness but still lose half an amp (only get a total of 9.5A out), but the extra cost of getting even thicker cable wouldn't be worth the next 100mA you only MIGHT squeeze out. You could also correct a combination of both length and thickness. e.g. You might be able to shorten a cable AND increase length which might be cheaper but produce the same result. Does that answer it?
I am not quite sure what you mean mate - but as a cable gets longer resistance goes up so voltage at the end you use it goes down. They call this voltage drop and is a serious problem for very long cables
so how do we actually use the electricity we get out of these wheels, what do we need to plug these into in order to have usable electricity? I built a generator with 2 of these on a bike trainer and get 150v at a comfortable pedal speed but cant figure out a controller that can take this and turn it into something usable to charge a powerbank? Help?
What was that weird rectifier you showed? A single diode? That delta connected stator needs 3 phase rectifier which has 6 diodes. It should produce a lot of mA into a short circuit at the wind speeds you demonstrated. I think you messed up the rectifier... 🤔
@@wizrom3046 sorry mate my bad - I have made a few vids on 3 phase rectifiers and I just assumed everyone would know that's the kind of rectifier you would have to use
Hi, without a variable pulse width modulator all your doing is heating the stator,. That why ypu have a low output. At 600 RPM it will produce about 10 amps.
@@ThinkingandTinkering Hi, when used with a generator it greatly reduces the back EMF at the stator. Less heating at the stator. I use a variable PWM on my hand crank generator and peddle Gen when charging super capacitors. They are about $10.00 on ebay.
@@ThinkingandTinkering I agree with all of the above but that motor does have powerfull magnets and a lot of coils with what looks like thick wire windings ..so at low RPM i would expect low voltage but higher curent . but i may be missing something .
Instead of attaching the blades directly to the motor, why not use a very large wheel with a belt around the wheel then have the motor on a fixed offset from the wheel and the belt to a very small cog on the motor.
Say Rob, I saw another video where these were turned into e-bike hub motors. But where I live anything 'out of the ordinary' gets targeted by police. And the pattern on the outer face of hoverboard motors makes it obvious the setup is homemade. Do you think there's enough metal on the outer face to machine them down on a lathe to a flat face? (I never see them for free, only cheapish secondhand. So I don't want to buy one only to find I probably can't machine it flat because it weakens it too much so it falls apart, etc.)
there is a lot of torque on these mate and machining the face would weaken it without a doubt - but I would think you could just fill the saw blade design with resin filler and overpaint
@@ThinkingandTinkering Thanks. Yeah I was thinking that too actually as I was typing. I guess I was hoping that because part of the pattern is shallower, that I'd be able to machine the higher area at least down to that same lower level.
Robert can I just say, you are using this motor as a generator the test is unfair and totally in valid. The motor is wired to be a motor for it to be a decent generator you should separate the phases then parallel or series connect them. That 5 ma will go up to hundreds of ma I'f not amps.
that doesn't seem right to me mate - a motor like this is going to be in delta or 'Y' configuration wiring - delta is the same as your series wound and Y is the same as your parallel isn't it?
@@DimitriPappas its more for low wind rpms... my 6blade turbine makes 4v in 1.5 meters per sec... thats why i prefer 6 blades not 3 and output also is 186w in good 21 meter gust
@@DimitriPappas More blades, more torque, more self braking. So, in very windy areas one could benefit of 6 blade system and while spinning slower, giving more power to the people.
@@Teknopottu for wind braking yes... if blades would be good and heavy not from pvc then output would be max 250-280w... but my turbine have got only 186w before it started wind braking... 3blades are good for more rpm in end but they are not good for low wind... and yes it all depends from area... in my videos you can see my area and its full of dirty wind... but it still makes constant power of 80watts when wind is 11 meters per sec
Two of these motors can easily push one man on the board.... So what if we put this to a normal bicycle like the one where you put a drill with some right angle adapters.... And give it a go.... As now we have higher Reduction one of the motor might be enough for that application.
There are videos on here of people drilling spoke holes and using them as hub motors. But the comments often say one motor is not very powerful and so requires that you push off manually to get it rolling first, or if you try to go from a standing start they burn out I assume. Then a few comments say to use both motors on the same bike to get a better result.
@@realfamilyman i think when used as a hub motor it might not be able to provide proper torque but if we use it's rubber tire as a Friction drive then we will have a huge Reduction which will definitely provide the torque needed.... Also the speed will be reduced quit a bit.... But that's where we have to sacrifice.
Robert, I have always heard that old reel to reel motors are perfect. High torque low speed. What do you think. Yes, I know to expensive for your blood! Lol
I've watched another channel that did experiments with hoverboard wheels but he used water instead of wind as it was much more stable when available. I saw one video where he was getting almost 60 volts and 3 amps. Experiments are a blast and turning that into practical application is even better. Love your stuff.
this will produce decent output - if you turn it fast enough and for that you need torque and gearing - ideal for water applications
I am actually doing something similar right now what kind of rectifier did you use which diodes to build
from my small scale testing(sample size of one each) it appears that an e scooter motor is actually a better generator than a hoverboard motor
I tested them on a makeshift hometrainer with a bicycle, the limiting factor in this case is the human pushing the pedals and friction between the motor and the rubber tire.
From the scooter motor I got a maximum of a little over 200W hooked up directly to a 12V battery, the hoverboard motor generated 90 watts, but with significantly more effort needed and the tire was also slipping a lot, even after adjusting the tension to the point where the resistance without load was not insignificant I couldn't make it grip properly
Hi Rob, Thanks for remembering us that the power equals to V squared.
Cheers.
Just disassembled a Hoover model dsa-blst 42v 0.4A..
The magnets in mine were half as tall as in your model, so not quit as powerful as yours.
Hi there. Love watching your video"s. You explain thing in a way that anybody can understand what you are doing and making. All the best from Cape Town, South Africa!
cheers mate
I wonder if this would be suitable for a water wheel. Although I would need a gear reduction to achieve higher rpms.
absolutely mate
that looks like it would be easy to hook up to a bike as the power source
for sure mate
Hooray for bamboo blade re-use!
yep lol
Missouri Wind and Solar recommends minimum height of 65 feet and 7 blades. His RUclips video “Missouri Wind and Solar Where not to install a wind turbine” has a very compelling arguments to justify his recommendations.
there are always compelling arguments to justify a position mate - but he is probably right - if you want a wind turbine you have to stick it in the wind
I was there yesterday!
Cool man. You should try to hook it up to a controller with regenerating breaking. Then I think you would get a lot more energy output. I love these hooverboard motors. Have build several kick scooters with them 🤓👍
When you put an electrical load on it, it will drag down. Regenerative braking is basically what's happening when the motor supplies power.
Rob, I’d be curious to see what would happen if your snapped off all the metal cores from the stator to see if it would pickup more speed and what the output would be? Equivalent? More? Less?
interesting idea mate - cheers
You did remove the electronics inside? That motor should produce way more than 4mA, rather 5~10Amps and roughly 18v-30v at least.
all the electronics are external to the motor with the exception of the sensors - and it would produce 5-10 amps at 18-30 volts if it was spinning fast enough - the problem here is it just wasn't spinning fast enough to produce much
Regardless of output you have to admit that was a very cool looking wind turbine. I wonder what the limit is for the length of the blades before they start becoming counter productive.
it was very cool lol
Good stuff, thank you for sharing.
My plan was to use a motor from an hoverboard for a Vertical Wind Turbine build (maybe a Daisy build instead :) ) to compliment solar panels for charging 24v batteries. However, following this build, it will not work as it requires to much turning speed... Any suggestions for an turbine suitable for a small Vertical Wind Turbine, targeting 24 v and 200-400W? Today I have average wind speeds about 2 m/s.
If you can gear up the revolutions then the speed is not a problem with vertical turbine either.
I have supplies for double oil drum savoniuses, stacking them and rising four meters from ground on field.
Have couple of hoverboard motors but unsure how to gear one up to spin it faster.
Have you got your project going?
I made a little tester this weekend using some 200l blue water barrels, cut thin to wide in an ‘s’ bend, then alternated the tops and bottoms around two bike wheels independently fixed into a frame top and bottom. Two rotors in the frame side by side, one higher then the other, and mounted the motors underneath and above each turbine so I could run a belt from each to the other (about 3 metres length!) works out about 5:1 ratio by my rudimentary counting! Just a toy project at the minute, as I’ve never really built my own design before haha! Hoping to hinge the blades on the drag sides, hence to offset in blade position(high/low) to counteract the imbalance created. Turns pretty well in low winds, sadly missed the weekend storms! 😂
Hi Robert, your videos are fantastic. I have a question well 2 but linked, to charge a battery what exactly else would you need to charge and also you mentioned a rectifier could you enlighten how to make one and the wiring please. Now off to watch more.
You need a three phase rectifier that turns alternating current (AC) coming from those three wires into direct current (DC) in two wires.
You can make one yourself using six diodes you can take from old appliances, old UPS's hold strong ones. Or you can order one from the 'net, couple of euros, maybe ten. Just connect three wires in and you got two wires with plus and minus. Use any search engine and study it a bit. Not hard at all.
Now you've got DC capable of running and charging many devices but the voltage is here and there. If you go too high, you can damage delicate electronics.
If you plan to charge something like 12,6V lithium batteries, best thing would be a buck converter. This is a bit more complex to make than bridge rectifier so ordering 300W capable one for 10€ is a no brainer. With that you can adjust steady output voltage and amps lithium batteries need. You need to remember that buck converters have an upper voltage limit so way too high voltage in can damage stuff.
If you plan on charging lead acid batteries, just get yourself a charge controller and input the power from the buck converter. Some charge controllers take higher voltages in, then you don't need the buck converter.
If you are new to electronics and some of this stuff seems alien, you can try charging smaller batteries, like phones and power banks first. Just get six diodes, twist them together and connect them on 12V/24V USB charger meant for car cigarette plug. Now you spin the three phase generator, rectify it in DC and convert it into 5V. 5V/9V/12V/15V/20V if your charger outputs it. 10€ car cigarette plug chargers have built-in buck converter, not as sturdy as a buck converter in the same prize but it works. Maybe monitor the input voltage coming in with a multimeter when connected on the charger, best not to get over 30V.
Hope this helps. Please, try stuff and experiment. Worst thing you could do is fail and learn from your mistakes. Maybe fry some cheap electronics so don't plug your phone first in, check it with multimeter and try out with cheaper stuff.
How about a two blade design which should run a bit faster ?.
Surely but with a lot less torque.
Ive been thinking about using hoverboard motors. Not sure or totally convinced, but the could be a good source for harvesting the magnets fir a large diameter hallbach array ??
Necesitas un mínimo de 450rpm a casi 500rpm para cargar baterías de 12v a casi 4A! La intención de esas hélices está bien, pero es demasiado diámetro, mucho torque pero rara vez alcanzará ese rango , es mejor meter 5 alabes y que tenga menor diámetro para aumentar su giro angular. Aun así es un trabajo fantástico
Check out Thane Heinze's work on creating a delayed lens effect. Basically by using thin copper wire many turns for his coils when the RPM hit a certain threshold , the delay in the lens effect is great enough for the rotation speed to over come the effect. The magnet is pushed instead of repelled.
cheers mate
I would have thought that the specified power of the motor would be slightly more than the amount of power you should able to get out of it as a generator. It would be interesting to know the specs of some of these motors that you are using as generators.
you could always look it top mate it is a razor hovertrax hoverboard
Awesome stuff , every day. Cheers for you
Thank you! Cheers!
Can you attach the hoverboard to a (wheel)chair for the elderly for geting round indoors?
I think they put out better power when you only use the two coils that are wound in the same direction.
Only using two of the phases.
I don't know - but that doesn't sound right
We use gas bottles cut out with a grinder to make blades. First take fitting out, then turn bottle upside down to remove left over gas for couple of hours. Or use compressed air into bottle to remove left over gas. Good work guys. Now did you get to hoover boards? If so why not make the other in to a go cart Rob? Have a wonderful day.
exactly what I am thinking mate lol
@@ThinkingandTinkering remember to use steer on that board you will only need stick controls going to the board. Good luck.
Hi Robert! I've watched lots of your video but had a quick question, whats THE BEST upcycled generator to use?
What if you attached an impeller to the shaft of the motors and attached it to a 'little y' pvc connector in 2 'n-shaped' pvc siphons that feed each other water between 2 trash cans(or buckets) that can hold water. You could use 2 pvc t connectors placed at the top portion of each n shaped siphon and run pvc to a 'capital y' connector which connects to a valve. Then to start both siphons simultaneously you could use a wet/dry vaccum on the valve until both siphons start, then close the valve. The objective is to create 2 siphons facing opposite directions that feed water into the other perpetually, using trash cans as the water tanks, and then harnessing this 'perpetual' siphon with the motors attached to impellers on the 'little y' connector. Likely the water level cannot be even in each trash can when the siphons are started. If the perpetual siphons works then you get a situation where both motors are constantly turning and producing electricity. If this set up doesn't work than one that uses 2 self starting siphons could be tried in order to perpetually create a scenario where 1 self starting siphon siphons and 1 motor-impeller spins while the other motor-impeller is at rest until its respective self-starting siphon starts (so an alternating motor-impeller but still a constant supply of electricity). I got the motors, the pvc pipe set up, the trash cans, I just need the to find impellers that fit the shafts of the motors before I can test. Sorry if this seems crazy, but I've yet to see anyone try 2 siphons that feed each other and I can't think of a reason why wouldn't work(when the water levels of the 2 containers at the start are not even, if they are even then I'm not sure what will happen).
I`m sure a bicycle hub dynamo would easily out perform this.
see video 1217
Great effort, unfortunately you botched the important bit. You need to rewire the star configuration of the coil inside the motor. Will produce much more power then.
Would be interesting to make a gravity battery with this. One wheel for generator. The other to lift the weight
Gravity is so weak though. You wouldn't be achieving a lot.
I back of the enveloped once that you need to raise a house to the height of a house to store the same energy as a car battery.
Do you think removing some of the magnets on the outer ring of the motor will help it have less resistance when turning I was thinking about making a vertical one if they use but I'm worried about the resistance from the magnets
ball bearings give a bit of resistance, need to find out how to make them glide better.
I wouldn't remove any magnets though
I have seen you make so many of these contraptions, You must literally have a wind farm in your home
lol - we reuse quite a few bits
just a thought bolt the second one just underneath with a belt between ....
cool!
Am o întrebare domnule se pot folosi doua motoare de haberboard pentru o eoliana axiaa verticala
Always entertaining 👍👍
Glad you think so!
Great video, as you have 2 motors from the hover board can you somehow couple them together to double the power output?
You would also need double the wind. When you actually charge a battery with the thing, it will create resistance.
@@rogerfreeman6787 I see, so you would be better off then making 2 turbines? That way the same breeze can power 2 turbines?
Brilliant as always Rob thanks. Just if you wouldn't mind I need to ask a none related question. Dose the length of a bog standed electric cable (ie extension cord) decrease the longer you run it from the power point? Hope you can help 🙏 . Thanks mate.
I think you used the wrong word (length)? If you meant to ask "does power output decrease the longer a cable is", then yes. I have an angle grinder that spins a little slower when using a 30m cable. Because the wire in the cable has resistance. So the longer a cable is, the greater the total resistance, so the more voltage is dropped across the cable, which in turn reduces total power output.
e.g. If you have 100V in, but 80V out of a cable, you've obviously lost about 20% of the available voltage/current/power.
Very generally speaking, doubling or halving cable length in turn doubles or halves resistance. So if for example you measured 10A output at the motor (where for calculation purposes you can assume you have zero ohms resistance), then you connect a 10m cable and get only 5A output, you could offset that loss somewhat by increasing cable thickness. In this example, since the loss is exactly half, you could assume (theoretically) that halving the cable length, or doubling cable thickness, would give you close to the original 10A output again.
In the real world you probably won't achieve the full 10A at the output. But it does give you a realistic target for cable length or thickness, because increasing thickness any more than x2 probably won't have much if any further gain. i.e. You might double cable thickness but still lose half an amp (only get a total of 9.5A out), but the extra cost of getting even thicker cable wouldn't be worth the next 100mA you only MIGHT squeeze out.
You could also correct a combination of both length and thickness. e.g. You might be able to shorten a cable AND increase length which might be cheaper but produce the same result.
Does that answer it?
I am not quite sure what you mean mate - but as a cable gets longer resistance goes up so voltage at the end you use it goes down. They call this voltage drop and is a serious problem for very long cables
so how do we actually use the electricity we get out of these wheels, what do we need to plug these into in order to have usable electricity? I built a generator with 2 of these on a bike trainer and get 150v at a comfortable pedal speed but cant figure out a controller that can take this and turn it into something usable to charge a powerbank? Help?
i have done videos on how to do that mate
What was that weird rectifier you showed? A single diode?
That delta connected stator needs 3 phase rectifier which has 6 diodes.
It should produce a lot of mA into a short circuit at the wind speeds you demonstrated.
I think you messed up the rectifier... 🤔
it was a 6 diode 3 phase rectifier mate - from specs on this at this wind speed you would expect 2-3 watts output
@@ThinkingandTinkering thanks for the reply, in the video we couldn't see the rectifier.
@@wizrom3046 sorry mate my bad - I have made a few vids on 3 phase rectifiers and I just assumed everyone would know that's the kind of rectifier you would have to use
You could stick a 3d printed academies blade on the other one now that you have a printer
Hi, without a variable pulse width modulator all your doing is heating the stator,. That why ypu have a low output. At 600 RPM it will produce about 10 amps.
that doesn't sound right mate - why would a PWM do anything on a generator? Isn't PWM to do with motor speed control?
@@ThinkingandTinkering Hi, when used with a generator it greatly reduces the back EMF at the stator. Less heating at the stator. I use a variable PWM on my hand crank generator and peddle Gen when charging super capacitors. They are about $10.00 on ebay.
PWM is used with wind, solar and regenerative braking systems. Without it all your doing is generating a lot heat at the stator
Very suprised at the low output from these motors i would expect far more.
why? - output isn't really a function of motor design - it to do with number of turns of wire, magnetic field strength and speed of rotation
@@ThinkingandTinkering I agree with all of the above but that motor does have powerfull magnets and a lot of coils with what looks like thick wire windings ..so at low RPM i would expect low voltage but higher curent . but i may be missing something .
I’m confused you said it was a DC motor, but put out 3 phase AC?
it's a brushless DC - on a normal DC the brushes and commutator act as a rectifier. Here there are no brushes or commutator - so - AC output
Could anyone tell me why the grills on the windows are such an odd shape.
(Its been bugging me for a while)
Ta
sorry mate - what grills? what windows?
I wonder how these would preform in a HAWT.
pretty much the same
Instead of attaching the blades directly to the motor, why not use a very large wheel with a belt around the wheel then have the motor on a fixed offset from the wheel and the belt to a very small cog on the motor.
now that is a very good idea mate
@@ThinkingandTinkering , thank you, I do have them very occasionally :)
Say Rob, I saw another video where these were turned into e-bike hub motors. But where I live anything 'out of the ordinary' gets targeted by police. And the pattern on the outer face of hoverboard motors makes it obvious the setup is homemade. Do you think there's enough metal on the outer face to machine them down on a lathe to a flat face? (I never see them for free, only cheapish secondhand. So I don't want to buy one only to find I probably can't machine it flat because it weakens it too much so it falls apart, etc.)
there is a lot of torque on these mate and machining the face would weaken it without a doubt - but I would think you could just fill the saw blade design with resin filler and overpaint
@@ThinkingandTinkering Thanks. Yeah I was thinking that too actually as I was typing. I guess I was hoping that because part of the pattern is shallower, that I'd be able to machine the higher area at least down to that same lower level.
The ones I have would be 2.4mm thick after machining flat.
Robert can I just say, you are using this motor as a generator the test is unfair and totally in valid. The motor is wired to be a motor for it to be a decent generator you should separate the phases then parallel or series connect them. That 5 ma will go up to hundreds of ma I'f not amps.
that doesn't seem right to me mate - a motor like this is going to be in delta or 'Y' configuration wiring - delta is the same as your series wound and Y is the same as your parallel isn't it?
@@ThinkingandTinkering not quite, you will need too use the hall sensor wires unless you can get your own wires through the hole.
please make 6 blade turbine like mine and then test it ;) or maybe you could experiment with stator for low rpm power?
aren't 3-blade designs generally agreed upon to be the most efficient? in what specific situations would a 6-blade variant be preferred?
@@DimitriPappas its more for low wind rpms... my 6blade turbine makes 4v in 1.5 meters per sec... thats why i prefer 6 blades not 3 and output also is 186w in good 21 meter gust
@@DimitriPappas More blades, more torque, more self braking. So, in very windy areas one could benefit of 6 blade system and while spinning slower, giving more power to the people.
@@Teknopottu More power to the people!!😂 Sure sounds like a winner then😉
@@Teknopottu for wind braking yes... if blades would be good and heavy not from pvc then output would be max 250-280w... but my turbine have got only 186w before it started wind braking... 3blades are good for more rpm in end but they are not good for low wind... and yes it all depends from area... in my videos you can see my area and its full of dirty wind... but it still makes constant power of 80watts when wind is 11 meters per sec
Two of these motors can easily push one man on the board.... So what if we put this to a normal bicycle like the one where you put a drill with some right angle adapters.... And give it a go.... As now we have higher Reduction one of the motor might be enough for that application.
I would think so mate
There are videos on here of people drilling spoke holes and using them as hub motors. But the comments often say one motor is not very powerful and so requires that you push off manually to get it rolling first, or if you try to go from a standing start they burn out I assume. Then a few comments say to use both motors on the same bike to get a better result.
@@realfamilyman i think when used as a hub motor it might not be able to provide proper torque but if we use it's rubber tire as a Friction drive then we will have a huge Reduction which will definitely provide the torque needed.... Also the speed will be reduced quit a bit.... But that's where we have to sacrifice.
I just need someone to tell me how to do it being a noob 😂😂😂😂😂😂
Robert, I have always heard that old reel to reel motors are perfect. High torque low speed. What do you think. Yes, I know to expensive for your blood! Lol
sounds good mate
Rose bud, Would be better I think. Those blades are too long.??
I don't think so mate - the blue length is actually good as the torque on this little motor is actually quite high
@@ThinkingandTinkering Ok So a water turbine may be better, than a wind.