What phase wires to use for QS205 at 10k-14kW and what to halls I mean cross section. Currently I have 10AWG but unfortunately at 10kW they heat up it is not some high temperature something around 50-60 degrees. Currently I have ordered for Halls 24,26,30AWG but I am wondering about the phase ones what cross section will enter the maximum in the AX without major problems.
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What AWG cross section for QS205 10KW
- Thread starter Artenidas
- Start date
Sounds like you're considering replacing or upgrading the phase cables, yes? If that's the case, the answer is, "as thick as possible while still squeezing through the axle."
Yes but I'm waiting for some suggestions that someone installed and there was no major problem whether 7AWG will not be a problem to squeeze through
Gotcha. I haven't used that motor myself, unfortunately. Would it be possible to scrounge around your work area or borrow cables of known sizes to see what works, before you purchase?
Hello,
If you are taking about a qs205 50h you can upgrade the phase wires but will not do much, you have 4mm to 6mm inside the windings, the motor will overheat way quicker than the phase wires.
That been said more copper means less heat, but I don’t think will make any difference inside the motor. Also exchanging the cable for a bigger one and pass it inside the axle is a pain, probably you will also have to have less isolation on each cable than the stock cable.
Maybe you can publish some photo or more info on your build.
If you are taking about a qs205 50h you can upgrade the phase wires but will not do much, you have 4mm to 6mm inside the windings, the motor will overheat way quicker than the phase wires.
That been said more copper means less heat, but I don’t think will make any difference inside the motor. Also exchanging the cable for a bigger one and pass it inside the axle is a pain, probably you will also have to have less isolation on each cable than the stock cable.
Maybe you can publish some photo or more info on your build.
Here the current setup. I also need to replace halls wires, because here I have 0.75, and such thick az are not needed. Halls wires I have already ordered, but I'm still thinking about phase wires I currently have 10AWG
The engine is currently flooded with oil, made a hole in the cover, everything is tight but I noticed that the phase wires began to heat up.
Attachments
Many thanks for the photos.
So let me see if I understand.
1st you are cooling the inside of the motor with oil? Correct?
2nd the wires you have are 10awg to the motor not the 10mm stock ones (2x +\- 10awg)
If these 2 point bellow are correct, yes you would gain a lot by using a bigger phase wire.
Also if I understood correctly and you use oil to keep heat under control you would also benefit from using some king of heat sinks on the motor like “turbinators” or something similar to help cool down the motor and help the oil not keep getting hotter and hotter.
If 10ga is the biggest that will fit through the axle, one approach is to splice them to larger wires as close as possible to the exit point. This will help carry away heat from the wires inside the axle.
Not related to the topic but looks like you are using a 220mm rear brake disk. I have been trying to find the rear adaptor to mount a 220mm disk on a bike like this. can you tell me where you got it? Many thanks
1. Yep transfomator oil
2. 10AWG = 5.5mm 1x
All in all, now I'm wondering because the cables started to heat up after the engine was flooded with oil, because all in all, if then the core itself was heating up, and now the oil transfers the temperature to the housing, then all in all, maybe they are heating up because of that....
I use 100A 20s battery
I am from Poland and normally 203mm/220mm are available at my place
The oil will remove the heat from the windings and dissipate it all over the motor, making everything have a similar temperature, that's why you would get a big improvement from some heat skins like "turbinates", you have a good conductivity from windings to the shell now you need better dissipation on the shell to the air.
I would upgrade the cables, the stock ones are 2x +/-10awg, for a total of 10mm, you seem to have half of it. will help the with the heat.
I think when you say 100amps you mean battery amps. that would mean probably less than 250 phase. I don't see this motor overheating at this power at all.
350 phase from controller.
and the temperature sensor says what for temperature? you say on your initial post about 60 celsius but on the cables.
I ask this because maybe due to your motor being filled with oil the temperature is the same around all motor parts, and 60 celsius on all the motor is not high temperature.
anyway, I would install the stock phase cables as they are bigger 10mm2 per phase
