MOTORCYCLE ALTERNATOR

[bravokilo]

The motorcycle alternator is a good one to use in wind turbines. It is usually 12V, has strong permanent magnets and robustly built.  You can find them in discarded motorcycle engines in junkyards or bike repair shops. remove everything except the crankshaft and the housing. keep the alternator. The other side is where you  connect to a turbine.

I was able to find unused bike allternators which says 50w. I am not sure if this is 50 watts and if so, at 12v, it should produce 4 amps at around 2000 rpm. It is out of the engine and therefore I have to fabricate the shaft to the magnet rotor. I will post pix as soon as I can take pix of the alt.

The problem is spinning at 2000 rpm with enough torque. Less RPM means less voltage and current produced. For more torque, widen the radius of the vertical turbine.

At any rate, the wires can be replaced with leaner wires but longer to get voltage. Of course current will drop.

There are 3 more from whom I got it for P500.

BK

[bravokilo]

Take note, the alt has 6 poles with heavy wires (high current). The pole enclosed in plastic is high voltage for the CDI.The pole-sensor outside is to trigger the spark. We do not need the last 2. Just the 6 poles. It can be rewound to fit a purpose. The rotor on the left has a powerful magnet.

A shaft will have to be fabricated to hold the rotor. the housing of the shaft will hold the stator.


Any one interested in the remaining 3 units, text me ASAP. Madali mawala mga ganito. P500 each. Hinde tindahan but a supplier that I have been dealing with matagal na. They buy stuff from close out sales, closed factories or dealers. Brand new sila. Good to experiment with in making a windpower electric generator. Dito ako sa BF Homes, Pque.

BK 0922 281 0680

[iyo karpo]

The motorcycle alternator is a good one to use in wind turbines. It is usually 12V, has strong permanent magnets and robustly built.  You can find them in discarded motorcycle engines in junkyards or bike repair shops. remove everything except the crankshaft and the housing. keep the alternator. The other side is where you  connect to a turbine.

I was able to find unused bike allternators which says 50w. I am not sure if this is 50 watts and if so, at 12v, it should produce 4 amps at around 2000 rpm. It is out of the engine and therefore I have to fabricate the shaft to the magnet rotor. I will post pix as soon as I can take pix of the alt.

The problem is spinning at 2000 rpm with enough torque. Less RPM means less voltage and current produced. For more torque, widen the radius of the vertical turbine.

At any rate, the wires can be replaced with leaner wires but longer to get voltage. Of course current will drop.

There are 3 more from whom I got it for P500.

BK

sana malakas din ang hangin para maabot ung 2000 rpm

[bravokilo]

Yes, Pjarina sis. it is worth explaining. our problem in making windpower gensets are two: efficiency of the generator and efficiency of the windmill. and for that matter, as they say in Math, we should fix one variable and experiment with one. It is not a good approach to homebuilt the alternator and the windmill at the same time cuz we will not know which one is inefficient or perhaps both.  I suggest precisely to use a known and tested alternator. The car alt is not a good candidate simply because it has no PM and therefore does not max use windpower available. The motorcycle alt is better. Now, you are right, san we can generate 2000 rpm( Iam basing this on the dfact that idle in a car engine is 600 rpm and  it should be similar da bike). What comes to mind is to gear up to get speed but as I explained in my other posts somewhere is that gearing up is useless if the windmill is small since torque will not be available. The Dutch windmill for example if it has tremendous torge can be geared up to rev up an alt. but a small windlmill geared will simply stall.Experimentation, T and E (trial and error) is the key. I have a roofdeck on the second floor and I plan to build a vertical windmill. Start with say a meter in diameter wheel with blades around. Torque can be increased by lengthening the blades. I suspect to get 4Amp, I mighthave to build a 2 meter diameter vertical turbine with 1 meter tall blades.

     Now, we have to remember, the more the load the heavier it is to spin the magnets. Which implies, that we could have a smaller turbine but extract less fromthe alt.and thatis what I see in this bike alt I got.I don't have to spin it at 2000. If I spin it at 1000, I might get 6 volts.(assuming linear ang relationship of V to speed). but we have to understand power which is VA.Say we  get6v and 1 amp. That is 6VA or watts of power produced. If we want higher V, just rewind the coils to doule the length of the wire but we need half the thickness to fit. Ok, we get 12V but 0.5 amps. 6 watts pa rin. Walang problema getting the V we want , rewind lang yun but we are increasing the power in watts. It is like this: a 6V auto bulb drawing 1 amp has 6 wats of pwer(and in brightness).We rewound the coils to 12V and used a 12V auto bulb, the max itr can sdeliver is .5 amps. Six watts of pwer pa rin. So, why rewind? insated of charging a 12V battery, charge a 6V battery. ganoon din ang power ma istor sa batt.

The most practical to use is the radiator fan motor, gen sya,menaing, DC ang out. Say for a given fan we get 6V and 1amp. If we want 12V, series two. If we want 6V but 2 amps, parallel two.  We can make a single turbine na maraming maliliit na gens nakakabit.Parang radial engines ng eroplano nung araw. sewries parallel to get 12v and as many amps you want(more pairs). kaya ang suggestion ko kung maganda ang alt nakuha, do not do invasive modifcation. Use outside transformers or series to get higher V.

BK

[erectron]

pa OT po.

Sir Bong, do you have any links / sources on how we can know diff. speed of the wind in the phils?

[vox]

Take note, the alt has 6 poles with heavy wires (high current). The pole enclosed in plastic is high voltage for the CDI.The pole-sensor outside is to trigger the spark. We do not need the last 2. Just the 6 poles. It can be rewound to fit a purpose. The rotor on the left has a powerful magnet.

A shaft will have to be fabricated to hold the rotor. the housing of the shaft will hold the stator.


Any one interested in the remaining 3 units, text me ASAP. Madali mawala mga ganito. P500 each. Hinde tindahan but a supplier that I have been dealing with matagal na. They buy stuff from close out sales, closed factories or dealers. Brand new sila. Good to experiment with in making a windpower electric generator. Dito ako sa BF Homes, Pque.

BK 0922 281 0680

  GOOD IDEA !

[Lito Sapinoso]

  GOOD IDEA !

I tried harnessing electricity from my old motorcycle's dynamo (it had only two coils, one for battery and lights and one for the ignition). True it had to be spun at high speed to get the voltage desired. I did not try to fix a windmill on it though.

If one wishes to try a windmill contraption using this, the blades will have to be big (maybe about 2 meters long by 10 inches wide). There has to be several pulley combinations to multiply the windmill axle's rotation to the desired rotation of the dynamo (alternator). There is also a need for a heavy flywheel operated with ratchets (like the bicycle's rear wheel).

If vertical axis is desired, the diameter of the turbine should be at least 2 meters and with 1 meter height.

Since our country is typhoon prone, the windmill (or wind turbine) should have a very robust construction. Otherwise it would be VERY DANGEROUS not only to the owner but to nearby neighbors as well.

Oh, and the generated power should go to deep cycle batteries.

[Lito Sapinoso]

A thread I have been subscribing with, "energy saving device..." was closed by a GLOBAL MODERATOR because I guess he felt maligned by a poster. Because he is a GLOBAL MODERATOR, he can do that.

Be careful not to cross his path, otherwise your thread will also be locked.

His username is Toasted Siopao and he is a GLOBAL MODERATOR.

I am now quitting this WEBSITE to avoid further friction.

[bravokilo]

erectron,

unfortunately no but I suggest going to the DOE. they havedata for solar. 5 hours a day lang daw ang Pinas.

[nucleus]

pang honda yan ah, kagandahan nito madali makabili ng regulator, ang mahirap lang ay yung pag fabricate ng shafting para sa magneto tapered kasi yung butas nyan

BTW
P500 kasama na po ba yung magneto?

[spoco]

This is interesting!!

kaso di naman malakas ang hangin samin at wala ring river samin..

[bravokilo]

spoco, mag solar ka na lang.

[iyo karpo]

ung la

This is interesting!!

kaso di naman malakas ang hangin samin at wala ring river samin..

may lambanog naman siguro ---fuel ng tricycle o brigg-and-stratton generator,

mabawasan nga lang ung tagay

[Lito Sapinoso]

pang honda yan ah, kagandahan nito madali makabili ng regulator, ang mahirap lang ay yung pag fabricate ng shafting para sa magneto tapered kasi yung butas nyan

BTW
P500 kasama na po ba yung magneto?

pang honda yan ah, kagandahan nito madali makabili ng regulator, ang mahirap lang ay yung pag fabricate ng shafting para sa magneto tapered kasi yung butas nyan

BTW
P500 kasama na po ba yung magneto?

Madali lang naman ang shaft. you can buy a replacement part for the crankshaft of a motorcycle, or find one at your nearest JUNK SHOP and just weld a rod to extend it to the desired length.

a coil base can also be fabricated to spread the coils evenly around inside the magneto. I think it is best to wind up 8 coils for this.

[ΔЅịMø]

OT:

I am now quitting this WEBSITE to avoid further friction.

Ilang beses na po to sir ah.. Pro, mas maigi nga po sir kung di ka aalis.. Bka marami kpa pong matulungan dito..



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