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750 twin stator
- AllanB
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Any way its on its way back to the USA and I'm on the hunt - I do have a second hand one (in theory it will be OK) but figure I'd rather put a new or rebuilt one on.
So does anyone know of anywhere in the world these stators can be rebuilt/wound? No one in New Zealand apparently.
Thanks
Allan
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- steell
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KD9JUR
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- steell
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KD9JUR
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- Wolfman@SparksAmerica
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- steell
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I think that kills the swap idea, but I hope Lou (Loudhvx, AKA the electrical guru) will post to either confirm or deny my conclusion.
I PM'd Lou, so hopefully he will post his opinion on the subject the next time he is online.
Post edited by: steell, at: 2005/10/23 15:09
KD9JUR
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- AllanB
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Allan
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- Biquetoast
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- King Jeremy The Wicked
I have a link to a company in the USA who rebuilts them but as of yet no reply to my e-mail. Will keep posted.
Allan
Since you mentioned companies that rebuild, I used a company in Canada that did a great job. Quick turn-around, too.
I got my stator rewound at R.M Moto Électronique ... wow, it looks like they just re-did their website...
Post edited by: biquetoast, at: 2005/10/25 08:41
(1.) '75/'76 KZ400D - Commuter
(2.) '78 KZ750B3 Twin - Commuter
(3.) '78 KZ750B3 Twin - Commuter
(4.) '75 KZ400D - Sold
kz750twins.com
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- loudhvx
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I just compared a 83 GPz750 stator (same size as a 2 wire 650 stator) to a 750B stator, and the bolt holes line up, but unfortunately the GPz750 stator is about 3/8" smaller in outer diameter (eyeballing it, GPz stator laying on top of 750B stator).
I think that kills the swap idea, but I hope Lou (Loudhvx, AKA the electrical guru) will post to either confirm or deny my conclusion.
I PM'd Lou, so hopefully he will post his opinion on the subject the next time he is online.<br><br>Post edited by: steell, at: 2005/10/23 15:09
Oops. Sorry, I didn't know I had a PM til today.
If the GPZ stator is smaller, then I assume it will fit inside the rotor, unless there is some other interference. Then the only issues are the gap between stator and rotor, and the number of pole-pieces on the stators.
I am only familiar with the 3 phase 550 alternators, but the concept is the same.
The gap is self explanatory. Bigger gap... weaker output. But how much weaker? :huh:
As far as pole pieces:
The 3-phase 550 has 6 magnets producing 12 poles on the rotor (6-north, 6 south, evenly-spaced and alternating). Think of it as 6-pairs of poles. On a 3-phase stator, each phase must have a pole-piece for each pair of poles on the rotor. Therefore, there are 18 pole-pieces on the stator. A pole-piece looks like a coil (or a spoke) on the stator. That means there should be 18 coils on the stator.
On a single-phase stator, there must be 2 pole-pieces for each pair of poles on the rotor. In this case, that would mean a single-phase stator would need 12 pole-pieces (coils) to work with the same rotor.
So, here's what you want to look for: Assuming you are keeping the same rotor, then the number of pole pieces on a 1-phase stator should be 2/3 of the number of pole pieces on the 3-phase stator.
On the 550, it is 12 to 18. (2:3)
Let's say you have a rotor with 5 magnets. Then the 1-phase stator will have 10 pole-pieces and the 3-phase stator will have 15 pole-pieces. (still 2:3)
If your 1-phase and 3-phase stators don't have a 2:3 ratio on pole pieces, then that means they were meant for rotors with different numbers of magnets and are not compatible.
Post edited by: loudhvx, at: 2005/10/27 00:37
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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