Motorbike stator question
Motorbike stator question
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Discussion

bholleran

Original Poster:

361 posts

244 months

Wednesday 20th March 2013
quotequote all
Hi All,

I have a bit of a technical question that I cannot find the answer to. I have a 4 stroke 200cc engine that is based on a gy6 engine, but has bee modified quite a bit.

When the engine is in use it does not supply enough power to keep the battery charged. i.e. it will run correctly for about 15 - 20 mins max with every thing switched on.

I have spoken to the manufacturer and they say (although I am going to check) that they only fit a 6 pole stator as standard and that because the fly wheel is custom made, they cannot supply me (at least not at a resonable cost - £500 - 700 + vat, they claim they would need to get special magnets made.) with an 11 pole stator which I believe would fix or at least improve the problem.

So the questions I have are.

1. I assume that a 6 pole stator has 6 magnets in the fly whhel is this correct?
2. I have seen 8 pole stators with 8 magnets in the fly wheel, so this logic seems to make sense. However I have also seen 11 pole stators with 8 magnets on the fly wheel - how does this work?

Assuming I can get an 11 pole stator to fit in the gap and wired up correctly will it work with a 6 magnet flywheel?

If not - assuming I could get it machined to hold extra magnets, can I just get extra magnets added to the fly wheel, and is the spacing critical. And how many would give the highest output- I am guessing 11?


My feeling is that it would be much cheaper to by a ready made flywheel and dismantle / break it to get the magnets out and then just fit them to the modified flywheel.

Thanks

Any thoughts?

MajorProblem

4,700 posts

195 months

bholleran

Original Poster:

361 posts

244 months

Wednesday 20th March 2013
quotequote all
MajorProblem said:
I am not sure if you are trying to be funny, or if you posted an incorrect link. I have spend many hours searching fo an answer and could not find one.

But to clarify I know that I can get an eleven pole stator, and regulator / rectifier that would work on a gy6. This is not a GY6 engine it is just very similar. (Yeas ago was the starting point) the flywheel is very different to the GY6 one.

And I am basically trying to figure out if it is possible to have the fly wheel altered by adding the extra magnets, and if so how many do I need to add, and position.

But to do that I need to UNDERSTAND the relationship between stator windings and flywheel magnets.

Thanks Again

Six Fiend

6,067 posts

246 months

Wednesday 20th March 2013
quotequote all
This man may be able to help, his name is Sean and he's really very clever smile

Contact via e-mail from the website: http://www.hawkerelectrical.co.uk/