wire used for power harness?
- Thread starter johnathan
- Start date
Jackson
USA member at large
All wire is pretty much the same, resistance is a function of both gauge and length. 14 AWG makes more sense for your main battery lead. For the rest of your wiring it's overkill and will be quite cumbersome.
6" of 16 AWG> Resistance: 0.002 ohms
6" of 18 AWG> Resistance:0.003 ohms
Those numbers are rather insignificant, I image your multimeter can't even measure them.
6" of 16 AWG> Resistance: 0.002 ohms
6" of 18 AWG> Resistance:0.003 ohms
Those numbers are rather insignificant, I image your multimeter can't even measure them.
tylorwashere
Well-Known Member
That limber wire you are talking about is silicone wire, it makes things much easier
Resistance in it'self in not usually a problem, but heat generated from the resistance is. Just use a little wire gauge calculator. Normally you have MUCH longer runs, so you'll find that you don't need a very big wire, the sizes Jackson listed would work just fine. You can buy stranded aluminum wire for this type of stuff. I think you'll find it to be very 'limber'.
andy bards
Well-Known Member
wire and its flexability is important to reduce vibration transfer..
i use silicone wire to connect to flight controller and main chassis = no vibrations (or less) are transferred through wire because of its flexability, the multi strands also allow for more amps to travel down the wire rarther than one single copper strand wire. (not sure if the last bit true)
harder wire I would try to avoid, unless there is no vibration issues.. try your local rc model shop and buy some silicone motor wire..
good luck Andy
i use silicone wire to connect to flight controller and main chassis = no vibrations (or less) are transferred through wire because of its flexability, the multi strands also allow for more amps to travel down the wire rarther than one single copper strand wire. (not sure if the last bit true)
harder wire I would try to avoid, unless there is no vibration issues.. try your local rc model shop and buy some silicone motor wire..
good luck Andy
The silicone refers to the 'plastic' coating on the wire. Silicone it is a pain to work with due to the low heat tolerance, but very flexible. As for stranded carrying more current it is not really noticeable on 100' runs of AC, and only really matters when you experience the skin effect at UHF(a lot higher than the 50/60Hz you get in your house), so you could say the effects are non existent for lower voltage DC in such short runs
andy bards
Well-Known Member
the amount of wires used on a motor winding have a big difference to the currents and basic acceleraton properties,,, ie 17x1 motor to a 17x4 motor ...
the single core winding motor would have a quick acceleration whereas the quad turn motor would have slower acceleration but a higher top end...(I was allways under the belief that the more strands used allows for more amps rarther than a single strand the same thickness as the four strands)
if there was no difference in the amount of strands,, why do single core windings differ so much to quad core windings ....
the single core winding motor would have a quick acceleration whereas the quad turn motor would have slower acceleration but a higher top end...(I was allways under the belief that the more strands used allows for more amps rarther than a single strand the same thickness as the four strands)
if there was no difference in the amount of strands,, why do single core windings differ so much to quad core windings ....
Well for a start that is 3 phase AC, so the skin affect has a small play, but that is not the real reason. the reason comes down to the length of the amount of wire. Two parallel wires carry more current than 1 wire, try doubling the size and you'll find that it is nearly impossible to wind, and is a lot less efficient. The more length of wire you have the more torque, and precise you'll be (take a look at a gimbals motor), but shorter runs are going to have higher kv, smaller wire is going to carry less load, and bigger wire is going to take up a lot more room to wind, so if you wanted more amperage you could wind 3 thinner wires paralel and take up more flat space without getting thicker, so you'd fit more wire.
This might provide a lot of incite to that hahaha.
https://www.reddit.com/r/Multicopter/comments/2c3rha/what_if_anything_is_the_difference_between_the/
andy bards
Well-Known Member
not AC --
- a DC motor has or can have more than one set of windings,,, ,,, the armature on a brca brushed motor usually has three sets of windings .. ie.. old 1/10 rc brca stock motor is 27x1 (7.2volt) == but has three set of windings of (27x1)on the armature..
not sure on brushless motors,, I gave up racing/building motors 20 years ago..
as for the wire in question,, would you build your quad with it,,, or would you buy in my opinion the better silicone motor/battery wire....
the wire in the picture I would use in commercial buildings to push down conduit (tube),, silicone wire with its flexability would not be suitable for conduit ..
so to build a better quad and minimise vibration transfer around the quad,, silicone wire would be better, but the wire johnathan has will be able to handle thel currents involved.
A vibration free quad would be ideal for flight controller calculations,, but as we know its hard to get rid of all vibrations.. Every step to reduce vibrations and the transfer of them results in a more stable flight..
I would buy silicone wire, but as the wire you have can handle the currents, it will work
same as a prop will work, but will also work better if balanced.
andy
- a DC motor has or can have more than one set of windings,,, ,,, the armature on a brca brushed motor usually has three sets of windings .. ie.. old 1/10 rc brca stock motor is 27x1 (7.2volt) == but has three set of windings of (27x1)on the armature..
not sure on brushless motors,, I gave up racing/building motors 20 years ago..
as for the wire in question,, would you build your quad with it,,, or would you buy in my opinion the better silicone motor/battery wire....
the wire in the picture I would use in commercial buildings to push down conduit (tube),, silicone wire with its flexability would not be suitable for conduit ..
so to build a better quad and minimise vibration transfer around the quad,, silicone wire would be better, but the wire johnathan has will be able to handle thel currents involved.
A vibration free quad would be ideal for flight controller calculations,, but as we know its hard to get rid of all vibrations.. Every step to reduce vibrations and the transfer of them results in a more stable flight..
I would buy silicone wire, but as the wire you have can handle the currents, it will work
same as a prop will work, but will also work better if balanced.
andy
I have some 14AWG stranded wire on my big wooden hex build. Though it is in a much longer run I also have some CAT6 cable which uses 24AWG solid wire. I run it to provide data and 5v to all of my electronics. Cable vibrations were not a problem here, but it is more than triple the size of a 250, so the wires won't transfer much in the way of vibrations to the FCB. I'd try it with what you have, and then upgrade if vibrations become a problem.