Hot Motor wires

[neweuser]

Ok, so i ran the lipo. couldn't get distance for some reason, not sure why. Anywho, my motor wires ran real hot. Never had that problem before? Any ideas?:mad:1
Other than that...WOW! Talk about fast!

[SpEEdyBL]

high resistance and current are the only two factors that can contribute to wire heat. Bad solder joints have a lot of restance and thin wires have more resistance than thicker ones. Heat loss is ristance x current^2 so you need wires that are twice as thick in dia. if you double the current.

There should be less current draw now though, with the lipos being lighter, unless you have increased voltage?

[squeeforever]

He's running 5S vs. 16 cells. So its about the same...I think its a bad solder though...

[BrianG]

To add to what SpeedyBL said; the fact that the wires are hot does indicate high current and some resistance on the wire. It also indicates a voltage drop on the wire itself, which means less voltage is getting to the motor reducing speed somewhat.

Which part of the wire is hot? If there is a bad solder joint, that part should be the hottest, while the rest of the wire will be warm just from the heat-sinking effect. What gauge wire are you using for the motor wires?

[coolhandcountry]

I chatted to troy. He says the motor is hot as well. I wonder if it is heat transfer to motor wires. Not sure on accual temp.

[BrianG]

I guess the only way to tell is if the wires are hotter near the motor. Like I said, there will be some heatsinking effect on the wires, but there obviously should be a higher temperature near the source of heat.

[neweuser]

Well, i think bad solder joint guys.....i found that the connectors are definately hotter than the rest....will put 5.5 staright thru. i had 3.5 to 5.5 adaptors from running the LMT...will get new 5.5's and try that
thanks!!!

[BrianG]

Well, what about direct soldering then? If it's not the solder job, it may be the constact resistance of the connectors themselves.

[neweuser]

My thoughts exactly. direct solder would limit my options in motors as my lead wires from the controller are getting short!!! LOL, but i can cut them one more time and solder on some 5.5's??? LOL i think! I'll get ' er done!