24v truck dynamo

[guruji]

Dear Sir I bought an 24v old truck dynamo and would like to use it as a wind generator.The problem is that it has to go a bit fast to generate electricity.Is there something that I could do electronically instead of gears?

I thank you in advance.

[drdongle]

Rewind it, use a smaller gage wire with more turns.

[guruji]

Dr.D it's a good idea but it's a bit difficult for me maybe I do a gear than.

Thanks anyway for your help.

[Flux]

If you can live with a 12v system you will halve its speed.

It may work as it is on 12v well enough for your requirements but to get maximum power and minimum speed you will need to re connect the field coils in parallel if it is 2 pole or series parallel if 4 pole.  This should be quite easy to do.

Although you will get better maximum power and lower speed if you do this, the field current will be higher and this will be deducted from your output.

If you are in a very low wind area you may get better results using it as it stands, but you may need a bit faster prop.

If you understand electronics you could re connect the fields and feed them from a switchmode regulator, at low wind speed you will not need all the available field as the iron will probably be near saturated. You could then increase the field in high winds to offset the armature reaction.

To use it for 24v without rewinding you could use a boost converter but that would need a lot of electronic knowledge to make it track the load.

Hope some of this helps.

Flux

[guruji]

Dear Flux thanks for your help about the field you said when doing it in parallel you said the field current would be higher but gives less output.What do you mean?

I thank you in advance.