I am puzzled about this concept of...

[J3cubfan]

xx turn motor? [8)] What is that? All I have are RS540 motors what they?[:0] Does a 20 turn motor run faster than a 10 turn[?] Inquiring minds want to know...

John

[wldnas]

Im no expert on Modified motors but.....

I believe that the "TURN" number refers to the number of times the wire is wraped around the field coils on the armatures and generally the lower the number the faster and more torquey the motor will be, but as for double winds????

[SJoerD]

No, it's the other way round. A 10 turn goes faster than a 20 turn. Huh? [] I'll explain. []

The less turns a motor has, the more power it consumes and the faster it goes. This has to do with the resistance (in Ohm) of the motor's coil. Less resistance leads to a higher current and reduced power loss. Therefore a minimal resistance of the ESC is desired.

Now all that electric current running though those wires and speed controller cause a lot of heat as well, and you require a (better) ESC to handle it. You will also need a battery with a greater capacity because more motor-power drains obviously more power from the battery. It's mostly the current and not the voltage that causes a lot of heat. That's why power cables have 50.000V or more: If you would let the power go through it at 230V (like you recieve it in your house) there would be a masive power loss because of the high current.

You can't just fit in a big motor without having the equipment to handle it's powerdrainage. I think it's quite obvious, actually, it makes sense to me... [|)] You can't put a 600hp engine in a Rover Mini, image what would happen to the gearbox... [xx(] In addition to RC car story: you might want to have some spare gearboxes when fitting an 8-turn motor...

As far as I know the standard 540 sized motors are 27-turns. I hope this story is a bit clear to you. There is so much more to tell but you'd probably get bored... []

Sjoerd

[J3cubfan]

Cool thanks a bunch Sjoerd[^]. That makes sense.

[WillyChang]

Mabuchi RS540SH, Johnson 05 & "stock" motors have to be 27-turn Single winds. (nb: "540" and "05" also refer to the standard industrial physical size of the motors that we use)

There is only a limited volume on the motor's armature, so you can fill it only with a limited amount of copper. So for the stocker, a single piece of wire goes around each armature leg 27 times.

If you use a thicker single wire then you can go around the same windings a lesser number of times... eg a 10 turn 'single'.

You can also do the winding with multiple wires at the same time... eg a 10-turn quad wind. You'd use 4 skinnier wires, put them side-by-side and then wind this around each leg 10 times. Double, triple & quads are common, higher multiples probably not worth doing.

Each style gives different performance characteristics, general one being the lesser the turns, its usually got fatter & shorter amount of wire between brushes thus you get more power & heat with higher current flows.