Advantages of double or tripple winding

[Jules]

Hi

I have wound alot of motors but I have to admit I dont understand the theory behind it all. Can someone please explain the advantges of double winding or triple winding, and if there is any advantge of using multi winds over using thicker wire.
I have wound alot of 8-9 double turn wye motors and they work great.
Iam I wasting my time double winding them.
Is it the magnets that limit the motors power or is it the EMF force that limits the power.

Sorry for my ignorance.

Every day is a school day and as I took no notice at school I have alot of catching up to do.

Cheers,

Jules.

[spoke2570]

The advantages of thin wire over thick are long debatable, and the suposed gain/loss is small; If you have a bunch of thinner or thicker stuff that is doing the trick, you may as well use it.

Changing the fixed magnets will have tremenously less effect on the output than changing the magnetic force exerted on them by the stator.

pete

[spoke2570]

Here is a great comparison:

DadHavHi Guys, On one of my first motors I had a wind that would have ended up at the shoe of the leg. I tried something different. I tied the wire up against the leg with dental floss and stared my wind from the top. This was a little tricky to get it started, but the motor ran as strong as any I've built. Maybe another way to do it would to use the shrink tubing method of insulating the leg, but run the wire to the top under the insulation. Actually I solved that problem by winding three or four strands of thinner wire. This way you can get to where you wand without any trouble. Just a though. Have a good day.
John Back to top

[Jules]

Hi Pete,

Thanks for the advise. Sounds like I have been wasting my time with double winds. Even though it is very easy to do as I wind them both at the same time.

I am guessing what you are saying is that the number of winds makes the biggest difference. Just like at school the resistance drops ie less wire for the smoke to run though so if the volts stay the same the amps go up which means the EMF goes up. Is it as simple as that, or is there more to it than that.
Sorry for my ignorance once again,

Cheers,

Jules.

[spoke2570]

I don't think that you have been wasting your time. It is easier to get more copper on a leg with smaller wire than larger. More copper means either more turns or more current capacity. Either way the motor gets more power.

A higher turn count motor will take more voltage to achieve a given rpm, but will spin a bigger prop at a lower amperage and need a smaller wire guage. Fewer turns will need more amperage and less voltage for the same prop and a bigger wire guage. Fifty watts is fifty watts no matter how you slice it.

The next limiter is the amount of iron that you have to carry the magnetic flux that you are making. The 22.7 stators are good for about fifty watts in per stator. A tripple stack will take about onehundredfifty watts.

The fixed magnets are what the stator is pushing against and has two effects on the system; First, they give a more or less firm thing to push against. Like paddling a boat with a wimpy or stiff oars. Second, they are like a spur gear if the stator is a pinon. More poles lower gear ratio. A six pole can will spin a little prop really fast on fifty watts while a twelve pole can will turn a big prop pretty slowly on the same wattage.

There is virtually no end to how tight these things can be engineered to their given output, but I think that adequately generalizes the relationships of the parts in the motor. The speed control is another story left to someone who is better at laying down the programing codes better than me...

pete