Anyone dismantled a Rutland 504 windcharger?

A

ash2020

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Hello all,
I'm replacing the bearings in my Rutland 504 windcharger. It's a fairly straightforward job and the bearings have cost £16 for a pair of S/S 6002 so I'm well chuffed.
However, I marked the position of the plastic magnet housings as I dismantled it and, unfortunately, managed to wipe off one of the marks as I was cleaning it all.
By the feel of it, the round magnets are in sections, so realignment must be fairly important. Does anyone know what the alignment should be? In phase? Out of phase?
I can ring Marlec on Tuesday but I'm anxious to get the job finished.
Thanks for any help.
Andrew.
 
ash2020 said:
Hello all,
I'm replacing the bearings in my Rutland 504 windcharger. It's a fairly straightforward job and the bearings have cost £16 for a pair of S/S 6002 so I'm well chuffed.
However, I marked the position of the plastic magnet housings as I dismantled it and, unfortunately, managed to wipe off one of the marks as I was cleaning it all.
By the feel of it, the round magnets are in sections, so realignment must be fairly important. Does anyone know what the alignment should be? In phase? Out of phase?
I can ring Marlec on Tuesday but I'm anxious to get the job finished.
Thanks for any help.
Andrew.
Click to expand...
Is this any good?
Rutland 500 Series Spares
 
Alex_Blackwood said:
Is this any good?
Rutland 500 Series Spares
Click to expand...
Thanks Alex.
Isn't it great that they sell every single piece of it as a spare? I wish more companies did that.
What I need to know is whether the poles in the 2 circular magnets should be aligned or out of phase with each other.
I've actually measured the output in each way and it doesn't seem to make much difference. I'll probably give them a call on Tuesday just to check.
it's beautifully smooth now with the new bearings.
Thanks.
 
ash2020 said:
Thanks Alex.
Isn't it great that they sell every single piece of it as a spare? I wish more companies did that.
What I need to know is whether the poles in the 2 circular magnets should be aligned or out of phase with each other.
I've actually measured the output in each way and it doesn't seem to make much difference. I'll probably give them a call on Tuesday just to check.
it's beautifully smooth now with the new bearings.
Thanks.
Click to expand...
Looking at the spares exploded view I would have thought aligned otherwise they will be 180 deg. out and tend to cancel each other out. I can't think, off the top of my head why you would do that. However, I am not the design engineer. As you say give them a ring or drop them an email. I have dealt with Marlec for some of their other products, in the past. Always found them very helpful. Just a thought, it is not clear from the exploded view but is one section not stationary whilst the other rotates? In which case it won't matter how you reassemble!
 
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Alex_Blackwood said:
Looking at the spares exploded view I would have thought aligned otherwise they will be 180 deg. out and tend to cancel each other out. I can't think, off the top of my head why you would do that. However, I am not the design engineer. As you say give them a ring or drop them an email. I have dealt with Marlec for some of their other products, in the past. Always found them very helpful. Just a thought, it is not clear from the exploded view but is one section not stationary whilst the other rotates? In which case it won't matter how you reassemble!
Click to expand...
It's a rather clever design. The stator is stationary and the 2 circular magnets rotate, like the bread in a sandwich rotating and the filling staying still!
 
ash2020 said:
It's a rather clever design. The stator is stationary and the 2 circular magnets rotate, like the bread in a sandwich rotating and the filling staying still!
Click to expand...
OK Not quite evident from drawing. If that is the case then would they not be assembled at 90 deg. to provide 4 poles (2 Pairs)?

The above is probably a load of ***lox. Looks like it is something called a Halbach Array. Haven't come across that ( will have to do some research!)
Anyway must confess I haven't much idea of how it works with two disks, sort of understand it with one. I can see how the field strength can be concentrated in the centre aperture of the disc. Perhaps the two discs self align with a N/S lock when they start to rotate ???? Lets know what Marlec say I am intrigued! Probably perfectly simple when explained in words of one syllable. Also I now have just seen that I have read the exploded view incorrectly. I mistook the rotor for the second magnet. Anyway still not sure. However you only have three holes so you cannot be 180 deg out however you assemble. Also if for example the fixing holes on both discs are aligned with, say, a North pole piece then you cannot go wrong. Not sure all that makes sense!
 
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Alex_Blackwood said:
But do they have to be correctly marked as per the video??
Click to expand...
I think the two magnet assemblies have to be aligned relative each other so that North poles in one line up with South poles in the other , and vice versa, so that the magnetic flux passing though the stator coils is at its strongest.

Without any marks it may be possible do this by loosely fitting them on to a mandrel and rotating one relative to the other to find a point where the attraction between them is highest and a pair of screw holes line up. Then mark them indelibly and assemble the unit using these marks.

But maybe contacting Marlec for advice is the best way forwrd
 
VicS said:
I think the two magnet assemblies have to be aligned relative each other so that North poles in one line up with South poles in the other , and vice versa, so that the magnetic flux passing though the stator coils is at its strongest.

Without any marks it may be possible do this by loosely fitting them on to a mandrel and rotating one relative to the other to find a point where the attraction between them is highest and a pair of screw holes line up. Then mark them indelibly and assemble the unit using these marks.

But maybe contacting Marlec for advice is the best way forwrd
Click to expand...
I wish I'd thought to do that before I assembled it. I will probably have to do the whole thing again.

I wasn't sure how the stator is wound and whether the magnets need to be N>S or N>N. If you move a spanner around the magnet there appear to be 9 poles but you can't tell the polarity.

I did contact Marlec and they said that the magnets will align themselves. You have to be careful though, they would have your fingers off if you're not careful!
 
ash2020 said:
I wish I'd thought to do that before I assembled it. I will probably have to do the whole thing again.
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I did contact Marlec and they said that the magnets will align themselves. You have to be careful though, they would have your fingers off if you're not careful!
Click to expand...
Aligned as I suggested N to S and S to N then and self aligning with some vigour meaning no need to mess about marking them in the way I suggested earlier

ash2020 said:
That's a 913, but I guess the principle is the same.
Click to expand...
It does not look like a 913. It says 504 on the tail fin
 
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ash2020 said:
I wish I'd thought to do that before I assembled it. I will probably have to do the whole thing again.

I wasn't sure how the stator is wound and whether the magnets need to be N>S or N>N. If you move a spanner around the magnet there appear to be 9 poles but you can't tell the polarity.

I did contact Marlec and they said that the magnets will align themselves. You have to be careful though, they would have your fingers off if you're not careful!
Click to expand...
I refer the honourable gentlemen to my previous answer. Seriously glad you got a result!
 
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