Permanent Magnet Motor Used as a Pedal Power Bicycle Generator Dynamo

[sureshkumarbeee]

nice video

[videocommenter67]

Whoa, easy with the laser, you blinded me, lol : )

[JavaRatusso]

I would like to know when trying to achieve the specified 14-16 mph, up to what gear on this bike would be mostly likely used? Is it a 10 or 15 speed 26 inch Bike? I would think that given the "progressive step up" to a higher gear, the required speed could be reached easily. Great video man! One suggestion though. Use short sleeves if you are going to reach over the moving belt, because that motor was cranking fast enough to pull your arm into the pulleys. Be safe, and thanks again!

[JavaRatusso]

I would like to know when trying to achieve the specified 14-16 mph, up to what gear on this bike would be mostly likely used? Is it a 10 or 15 speed 26 inch Bike? I would think that given the "progressive step up" to a higher gear, the required speed could be reached easily. Great video man! One suggestion though. Use short sleeves if you are going to reachover the moving belt, because that motor was cranking fast enough to pull your arm into the pulleys. Be safe, and thanks again!

[bicyclegenerator]

@JavaRatusso I'm not sure on your bike which gear will get you comfortably to 14-16MPH, but on my 21 Speed I have to put it at 19th gear to get there comfortably. This generator is just like pushing against wind when you ride. If you ride slow with a PM generator hooked up to your bike, then you feel almost no resistance, but if you pedal fast, then suddenly its super hard to pedal!

[JavaRatusso]

I would like to know when trying to achieve the specified 14-16 mph, up to what gear on this bike would be mostly likely used? Is it a 10 or 15 speed 26 inch Bike? I would think that given the "progressive step up" to a higher gear, the required speed could be reached easily. Great video man! One suggestion though. Use short sleeves if you are going to reaching over the moving belt, because that motor was cranking fast enough to pull your arm into the pulleys. Be safe, and thanks again!

[Rizky06]

You would have to pedal pretty damn fast!!.....:-0

[PatinOmaha]

Why did you abandon this motor for the one that you're currently (no pun intended) using? The motor that your new plans use doesn't look like it could handle 300 watts on the wires coming out of it.

[bdwhaley2]

@PatinOmaha The new motor being used today has much more current carrying capability. It has a peak rating of 30 Amps vs. 14 AMps

[manouchk38]

Very interestiung video! I could use it with my student. They could learn about english, DC motors and rotations! ( i'm physics teacher in Brazil)

[rickm09]

dont look like hes ever used one lol

[terentatekhunter]

Very helpful advice sir. Thanks.

[brh5073]

dude get in shape and stop breathing so heavy

[edisheng]

I am recently doing my project of flywheel energy storage.and i need to measure how much power store in my dc motor from rotating mass-flywheel. At 5V the dc motor able to spin up to 4000RPM, so is there any idea to convert my dc motor as a generator and can I increase the output voltage says 12V.Thanks

[bicyclegenerator]

@edisheng Use a data logging current sensor with your DC motor and measure how many watt hours it takes to spin your fly wheel up to 4,000 RPM. The you will see how much energy went into your fly wheel. Then with your flywheel is still spinning, put a 20 Ohm resistor across your motor leads, and let the fly wheel run until it stops, with the current sensor data logger still running. This will tell you how many watt hours was stored in your fly wheel. Try the WattsVIEW sensor.

[RCvehicles]

Hi, How accurate is the digital tachometer you are using? And how does it work? do you have to put a reflector on the pulley? Would you recommend it? A quick reply would be much appreciated! thanks

[bicyclegenerator]

@RCvehicles The tachometer is very accurate- it has a digital counter in side - that triggers off a rising edge when the laser beam hits the reflector tape. I think it has a spec of ± 1% accuracy. Nowadays these tachometers are priced pretty reasonably and for a person like me who is only an occasional user, yes I would recommend it.

[elledeeism]

I'm trying to build my own generator to use with kids and am running into troubles with my dc motor.  I'm using quite a small bike, and can't get the motor to generate enough to power much of anything. I got the motor from an electronics surplus place, and don't know it's specfications, but I suspect it's rpm is too high. can you give me some suggestions about what kind of specifications would be best to work with a kids bike? I just want to hook it up to lights, so kids can see their work

[bicyclegenerator]

@elledeeism For a small kids bike you need to use a motor with a voltage rating of 80 to 160 Volts DC with an RPM rating of about 3k. The easiest way to store and use your energy is to wire your bike generator output to a powerpack through a blocking diode. THis powerpack can power up cell phones, TV, laptop, light bulbs, you name it.

[bicyclegenerator]

@elledeeism For a kids bike application you have two options, the 1st is to use a DC motor that is rated for over 80 Volts, I like the treadmill motor I bought from a surplus place, it is rated for 110 Volts DC and up to 6 Amps. The only problem with a treadmill motor is that it has a very strange shaft hat must be ground down smooth so you can put a pulley or roller on it. The 2nd option is to mount a horizontal shaft on a piece of wood with step pulley, upping the spin ratio.

[elledeeism]

@bicyclegenerator I've rigged a sort of pulley set up by cannibalizing another machine, and I got up to 12 v pedalling. It's not a huge amount, but I figure it might be easier for kids since their legs are the right size for the bike, as opposed to mine which are far too long. Thanks for the suggestions, I really appreciate it.

[zeropointfuel]

Our best performing sequenced Pulse motor is driving a induction generator charging 8 44AH Batteries at 30-40Amps while recovering 80% of the energy that is being used to drive the pulse motor. check out a induction power generator for your application may be worth your time. A self excited induction generator can make 120v at 650RPM with the right capacitors and its producing 3 phase AC output.

[ZirixZero]

What happens if you attach the motor to a car going 75 MPH? That would be a shitload of energy.

[bicyclegenerator]

@ZirixZero Your average car can put out 150 horse power which is about 111,000 Watts of energy. Compare that to a human on a bicycle - that would be only 200 Watts of power output. So a car would put out about 550 times as energy as you on a bike generator.

[FROSTYDEAN15]

could it be put up to 5000 rpm and be able to drive a propeller?

[bharathyea]

This was the great Brad. The best i have seen till date:). From an Indo-German Engineer.

[bryguy124]

Where did you get the Permanent magnet motor?...can i get it out of a tread mill?

[bicyclegenerator]

@bryguy124 You can get the permanent magnet motor from Ebay pretty cheap by typing in the words "DC Motor" into the search window. ALso you can use treadmill motors although the problem with those is that you have to design a pretty funky mounting bracket to make it work with your setup and also the shaft sizes are really funky so that you can't just put a pulley on it. I was able to give one 12 volts and make spin and then grind down the shaft with a bastard file so it would fit a skateboard.

[zuseable]

hellow again by the way have you got to play with a razor scotor motor yet there grate and playing with the pullys changes all your tests smaller power sorce bigger gen bigger gen alteres sorce ?

[bicyclegenerator]

@zuseable Yes- the razor scooter motor is the best thing to use for the money. It has ball bearings, and it's four poles instead of just two, and it also can handle high temperatures so up to 20 Amps of current. 

[zuseable]

hello i own a lincon gasolin welder and i have found if you turn a dc motor it makes dc curent so if i take a dc generator off a lincon welder and add power would it spoll up as a dc engine cant find out my self can you help want to make an elictric motor cycel if it will work

[bicyclegenerator]

@zuseable The DC generator off a Lincoln gasoline welder may work great as an electric bike motor depending on what kind of generator it is. Do you know if it is a three phase generator? Can you post a video response showing what it looks like?

[anewlow23]

For the price of one of your bike generators I could have three maybe four solars panels or a really nice racing or mountain bike. 667 dollars shipping not included for the cheapest bike generator on your site get real man.

[bdwhaley2]

Bike stand $90, Adapter Plate $70, powder coated sheet metal enclosure with silk screen labeling $90, Adjustable length V-belt $50, customized air cooled generator with pulley $110, included volt meter $10, current monitoring shunt resistor $5, shipping costs $50, 3 hours labor to assemble, test, box, & ship $100, USA gov. takes 15% self employment tax ... not easy. That's why give you free plans to make your own for cheap.

[wigleboy]

@bdwhaley2 yea all-in-all that is pretty cheap.

[jsugar72]

@anewlow23 your a negative bitch - I'd pay money to slap the shit outta you - punk

[anewlow23]

@jsugar72 Its just really overpriced that's all its not economical for the amount of energy you get out. What the HELL is you problem??? Of course I am somewhat negative my username has anewlow in it hello!

[bundlesofmsg]

get that lazer out of my face

[Ohmide]

So what happens if you peddle faster than the red zone...does the battery recharge faster?

[g25a25c]

@Ohmide

you'll overheat your motor aka bust it

[Ohmide]

@g25a25c

What if you had a charge controller added to the mix like in a solar power system?

[Ibringthetruth1]

give amps too next time.

[harryfodder]

DC motors suck! get a car alternator, break it apart, and then re-wind it with some 22-24 gauge wire with the same 3 phase design. don't forget to install permanent magnets on the rotor to increase the efficiency. you can run the 3 phase lines a great distance to the battery station and using rectifier diodes to convert it to DC power.

alternators are dirt cheap, and much easier to find than DC motors. the benefits go on and on...

[bollox93]

@harryfodder You fucking idiot.

[harryfodder]

Gee... Thanks??? lawl

[anewlow23]

I kind of agreeing with you on using alternators because this dc motor he is using is way too expensive but what about the permanent magnets you have to buy for the alternators and all the time rewiring?

[harryfodder]

the re-wiring isn't too much. you could use a car alternator straight and just need to feed 12v to the exciter wire which magnetizes the rotor, then it starts producing electricity. it's still more efficient than a dc generator even in that configuration. it will put out a steady 13-14v with the regulator.

to make it much more efficient you can go with the permanent magnets, but most rotors on ebay sell for around $100 or so. there isn't much rewiring required either.

[harryfodder]

the main hurdle with using permanent magnets is that you need to control the voltage by another means. i've thought of using multiple mosfets or other transistors hooked up to the voltage regulator. when the voltage goes above a set range they shut off, go below, they kick on and so forth. multiple mosfets would be required to keep the amp heat load down.. and maybe some heatsinks.. but that all depends on the amps that are being generated by the alternator.

[ReflexiveBeef]

thank you very much, you are a good man

[aggalf1978]

great video . well done

[r3inhout]

sry to ask but do you smoke? or did you ride your bike before recording this? It's because your breath is rather heavy.

Greetings

[bicyclegenerator]

It's the high altitude in Phoenix causing that.

[thederector5]

Thank you very much for the info... ;)

[zxzkilme3]

and in the end ur still using enrgy to spin the magnets.... useless equipment... thers no such thing as free lunch

[Magganrchy]

Very good video. I without a doubt rather too much information than too little.

[BWCVa]

A complex process simply explained. Would enjoy seeing a future video showing some practical applications from this set up.

[dmastax1x]

great vid! just what i was looking for!

[MueraTelevisa]

exellent job thanks for sharing it with us!

[Nykkytta]

Brad. Most excellente Job. Keep up this work.

[pixar5]

just curious i have a reel motor and use a belt on a bike and noticed when hooked up to a battery 12 volt 3 amp the voltage of the battery goes up fast but when im pedaling i pedaled for 10 min the reel motor has a 12 to 24 volt i used a charge controler up to 5 amp the reel motor has says dc 13.8 volt and dc 4.8 amp but noticed after 10 to 15 min the battery level goes up to 13 or more volts but after i stopped pedaling 20 min later checked the battery level and it didnt go up at all

[bicyclegenerator]

What's the model of your battery and whats the model # of your charge controller? I want to look at the specs. It sounds like your batteri is not able to take a charge. You need to do a load test on it and make sure it works correctly. Did you buy this battery new? or did you find it used from some place?

[evansvilleguy1]

Excellent job. Brad should be a teacher!!

[evansvilleguy1]

Excellent information. Thank you!!

[netlethe]

Great vid .. thanks .. into my playlists ..

Hope you'll join us here ..

Peace,

Red.

[tjgame2]

Great video. I have one stupid question, I'm new to generators and all that, but would you be able to put as much of a load as the motor could. I mean to say if you have a 100watt motor could it, with enough power spinning it , make 100watts.

[Nopiw]

good work

[ezrausa]

This is the most educational video I have found on the theory of using PM motors as generators. Brad does an excellent job of explaining the relationship between rotational speed and voltage/current output.