Alternator Generator (just a biginners effort) from Pakistan

[numberonebikeslover]

Hello every body;
What I have gathered from the internet and my experiments is that symmetry of Magnets and coils is an essential for the efficiency of an axial flux alternator, therefore I break the magnets in half and put 20 of them at equal intervals. I think my video can explain a lot more than my words:

http://www.youtube.com/watch?v=ctT4PLI4_wI

Naeem

[numberonebikeslover]

Hello every body;

I have been so busy lately in office work, could lift my head off. Finally found some time to find an answer to a question revolving in my mind. "What pole of a magnet passes through which coil and so on and so forth?" So I made a model of stator and coils on pieces of papers and rotated them accordingly. the paper representing coils had holes while magnetic stator showed the position of magnets. Please see the following video for detail.:

http://www.youtube.com/watch?v=WhIHWMbRJD8

Yours Respectfully
Naeem

[Harold in CR]

Hi Naaem

I don't know if you have seen this website. They are pretty much the go to place for the Axial Flux Alternator Build for Wind Turbines, at low RPM's. They are very helpful, same as the folks on E-S Forum.

http://www.fieldlines.com

[numberonebikeslover]

Hello every body;

My work has slowed down due to lot of work in the office (management / administrative type job nature)

here is a video of some of my work now about the alternator. It is one week late as youtube videos upload was giving me such a pain in the neck and looking out for a substitute. any way, it worked at last:

http://www.youtube.com/watch?v=1GY4xtR9CjU

Naeem

[numberonebikeslover]

Hi Naaem

I don't know if you have seen this website. They are pretty much the go to place for the Axial Flux Alternator Build for Wind Turbines, at low RPM's. They are very helpful, same as the folks on E-S Forum.

http://www.fieldlines.com

Oh thanks brother I have been there about 2 - 3 years back and also paid a visit again but same situation about registering my self in the forum; It wouldn't allow it for My country I guess. Any way I would love to share my work with them.

thanks man.

Naeem

[numberonebikeslover]

Hello everybody;

Electric power cuts are at its worst these days reaching to a 12 hours of power breakdown daily. I want to speed up my work to benefit from it but my back is still not completely healed I wish it gets well soon.

Any way here is some more work:

http://www.youtube.com/watch?v=XIj4gruD ... re=related

http://www.youtube.com/watch?v=ruCf3E6G ... t_received

[numberonebikeslover]

Dear All;

My lower back pain has reduced my activities so much that I spend most of my time in bed in front of my laptop. Doctors say that it will take time to heal and I have to seriously take rest and quit any bike rides for a month.

I just came across an idea and wanted to share with those who have experience with building custom brushless DC motors (sensored / Sensorless). My Axial flux alternator could easily be converted to a motor I guess. with slight changes I think I can built it inside the wheel of a bike. Hows that?

Sincerely
Naeem

[numberonebikeslover]

Hello guys;

While browsing the youtube for home made BLDC motors I came across this monster:

http://www.youtube.com/watch?v=j53FIHP3bPw

I am sure my alternator can be converted to a BLDC motor Now I need some useful links to study and reach the point where I could start making a controller my self. There is one more option that a Controller is not a heavy object to import from abroad than the motor itself.

Is it essential for such a BLDC motor controller to have a certain number of coils? Because mine have 5 coils per phase, and a total of 15 coils. One thing is for sure that It must have a 3 phase configuration.

I would definitely need the guidance of my ES family for this.

Really looking forward for useful feedback.

Yours Sincerely
Naeem

[Kingfish]

I enjoyed that video and the one following in the series very much. It gives clear insight how to build an AF stator. Definitely a good starting point for DIY. Thanks for sharing

Cheers, KF

[fechter]

The number of coils is not really a limiting factor. If it works as a generator, it can work as a motor. I've seen motors that use a single turn.
Building a BLDC controller from scratch is very challenging. It would depend a lot on what materials you have available. It would be much easier to modify an existing controller or simply find one that will work with your motor. Most modern controllers use a microprocessor to handle all the signal processing.

One possibility is to use hall or optical sensors to commutate the windings such that you can use a standard brush type PWM controller to feed it. This takes a few more parts and increases losses slightly, but may be easier to build if you already have a PWM controller.

Is it possible to get a controller from a chinese scooter or ebike?

[numberonebikeslover]

Is it possible to get a controller from a chinese scooter or ebike?

My dear friend;
Thank you very much for such a useful feedback. The aforementioned option is also a possibility provided I some how manage to pay cell man to provide me with a suitable controller. For the fact that China is quite near by our country it would be indeed less cheaper to import stuff from their.

I have never ever seen or felt a BLDC e-bike controller so it is like a technology from out of space for a man like me. Only gone through the theory, and therefore I would like to share my understanding about it through a diagram. I would like member to correct me where every I go wrong.

I highly appreciate your support and help that you people extend me time and again.

with much respect and kind regards.
Naeem

[numberonebikeslover]

Here is the wiring diagram. please feel free to correct me where ever I am wrong.

[kfong]

Nice work, you should really build a work bench to make it easier on your back.

[numberonebikeslover]

Nice work, you should really build a work bench to make it easier on your back.

I am seriously thinking about making one to give my back a rest. Till now I am on bed with my laptop and not picked a tool yet. I'm feeling a very slow improvement in my back now. Doctors say, it might take as long as 6 months to get back to normal routine. I'm forbid to move much around and bike ride is not allowed.

Naeem

[lizardboy]

jusrt a suggestion but;

if your trying for three phase to get the best eff. then you should have a ratio of 4 magnets to three coils that will get the magnets in time with the coiul spacing better.if your not concerned about cogging you could try a core for the coils or a metal backer for the coils to increase the output.

[numberonebikeslover]

jusrt a suggestion but;

if your trying for three phase to get the best eff. then you should have a ratio of 4 magnets to three coils that will get the magnets in time with the coiul spacing better.if your not concerned about cogging you could try a core for the coils or a metal backer for the coils to increase the output.

Thanks for the response; these days I am having back pains and I have to abstain from any mechanical work involving bending my back bone inward.
Please, have you seen my this video on Youtube. in which I have tried to explain how the coils interact with magnets in three phase situation. I am sure that In my symmetry the coils also coincide with magnets in proper timing. Here is the video link:

http://www.youtube.com/watch?v=WhIHWMbRJD8

Please do let me know what you think.

Naeem

[toolman2]

Dear All;

I just came across an idea and wanted to share with those who have experience with building custom brushless DC motors (sensored / Sensorless). My Axial flux alternator could easily be converted to a motor I guess. with slight changes I think I can built it inside the wheel of a bike. Hows that?

Sincerely
Naeem

well Naeem, interesting idea that one, turns out thats precisely how the (still i believe?) most efficient motors on the planet do it. they win the world solar car races with them at around 98% efficient, -called the csiro deigned axial flux hub motor, so yes good thinking..

[Arlo1]

Very cool.