[GodF@ther]

Can any one please tell me how to wind a Y topology based 3 phase winding into my 36 tooth stator(INRUNNER)

[Arlo]

Originally Posted by GodF@ther

Can any one please tell me how to wind a Y topology based 3 phase winding into my 36 tooth stator(INRUNNER)

WYE meens the end of each phase is conected together.
Delta means the end of one connects to the start of one. http://www.google.ca/imgres?imgurl=h...9QEwAg&dur=300

[GodF@ther]

So tell me how do i Coil the stator;I know what do they means ;But in what sequence they are to be coiled if I am using Y wye topo

[PStechPaul]

I am not too familiar with inrunner motors, but here is one that is good for at least 3 HP for only $50:
http://www.hobbyking.com/hobbyking/s..._Inrunner.html

If you want to rewind the motor as a three phase AC induction motor, for lower voltage, with a 36 slot stator, I did that several years ago:



This was a 1/2 HP single phase 120 VAC PSC motor, and I rewound it as shown as a three phase 8 VAC 12 pole motor, which ran at about 600 RPM at 60 VAC but I overclocked it to 240 Hz for 2400 RPM. It is hard to see, but I used overlapping loops of wire so there were 18 bundles to get 12 poles (6 pole pairs x 3 phase). I was seeking lowest RPM and highest torque. If you want higher speed, you must use fewer poles. There are six wires total, and they can be connected either wye or delta for different voltages. The sequence of winding is not important as long as each winding in a phase goes the same way around each pole. To reverse the motor, just switch any two phases.

It seems like way too much work, and a high risk of failure, to attempt to build a BLDC motor from an induction motor. Why not just generate the three-phase AC and use a standard VF controller?

Here are some possibly helpful resources:
http://ww1.microchip.com/downloads/e...tes/00885a.pdf
http://www.teslamotors.com/blog/indu...ushless-motors
http://www.uiitraining.com/b51a/100/...ind_intro1.htm
http://www.wisc-online.com/Objects/V...px?ID=IAU11808
http://www.freshpatents.com/Three-ph...0060214529.php

HTH!

[Ivansgarage]

[mizlplix]

By using an in-runner design, you must make the magnet retention extremely strong. Or you will have to limit the top RPM, and that defeats your whole plan.

Most ultra high speed BLDC motors use an outrunner design. That way the magnets are inside the outer rotating shell and centrifugal force only seats the magnets more securely.

Your plan is sound and worth doing. Just keep thinking "magnet retention".....

Miz

[GodF@ther]

Smashed off the old wave Winding......Now have a look at the stator

[GodF@ther]

Yeah ;I know that the centrifugal force would through the magnets out of the shell so I would precisely consider the factor....

[PStechPaul]

When I rewound my motor, I used the following sequence for 12 poles:

A C' B A' C B' ... x6

This was easier than having two layers as shown above for the four pole motor, but it runs slower (600 RPM at 60 Hz). However this allows it to be overclocked and thus may be able to provide 6 times the power at 360 Hz and 3600 RPM.

[PStechPaul]

Originally Posted by Arlo

If you watched my video you would see I made a motor not a generator.
Here is a link to help you with winding. http://powerditto.de/bewicklungsrechner.html

I'm not sure that I can agree with the winding schemes proposed by this utility. I understand that it is for an outrunner design, which I have no experience with, but as I understand it, the belts are not wound on individual pole pieces except in the case of 6 slots.

The belts surround several pole pieces, and sometimes have multiple layers with an overlap pattern that provides a smoothly varying phase shift of magnetism which reduces the cogging effect and makes for smoother operation.

In the illustration for 12 slots and two poles, for instance, there are two adjacent pole pieces, each of which has a clockwise winding of N turns. But in the slot between the pole pieces, there are 2N turns, but the current in them cancels, so there is zero net effect. You get the same effect by skipping that slot and winding around both poles.

But this is still very inefficient. In the slots between the poles, you have N windings at phase A, and also N windings at phase B, so the vector sum is actually 1/2 C'. It gets a bit confusing, and I don't claim to understand it fully, but if you examine commercial three phase motors (and also single phase) you will see overlapping belts.

Have you actually wound motors this way? It would be interesting to see if a different winding pattern would be more efficient. At the very least, it should reduce the overall length (and resistance) of the windings, and allow a heavier wire gauge.