Im new to RC however i have a strong electrical and electronics background. I have slash 2wd with a havoc sport esc. Recently out of the blue my 17.5 turn ss pro motor started overheating I also have a 13.5 turn ballistic that started overheating and is stuttering when given throttle on the ballistic it will stutter for a bit then give a locked rotor error. Iv gone through everything in the gearbox cleaned it out put new grease in checked all bearings. Went through both motors did find a bad bearing in the 17.5 but has been replaced. Still overheating i have not started running any different gears either same gears iv been running with tems in the 150* range for a while now. The time period which the overheating is occouring is very short as well less than a minute and just putting around my living room floor. Im pretty sure that the 17.5 turn motor is damaged from it now appears to have heat damage. But the ballistic still looks fine. Iv contacted Novak support and they havent been able to give me any very usefull information. Everything they said i have already done except change the capacitor on the ESC. Entire set up is 2wd slash Havoc sport ESC 17.5 ss pro 28/86 13.5 ballistic 20/86 2s lipo 30C stock size tires. If anyone has had a similar issue or has any ideas i would greatly appreciate the feedback.

Thanks,

Blake

Try a different ESC. If the ESC isn't scavenging Back-EMF properly or is improperly handling phase switching, it could be fighting itself and wasting current as heat.

Well I'd like to do that but unfortunatly I don't have a spare just laying around.

I had the same problem with a 10.5 havok 3s combo sent it back 2 times and they said the fixed the issue but I had the same problems , Now I run Tekin and don't have any problems anymore

That may be what I do I have another motor I can't use with the esc because it dosent have the thermal overload circuitry in it. I would like to get somthing I could use all three with especially since I'm pretty sure the 17.5 motor is done for now. Novak recommended replacing the power cap if that dosent work I'm gonna just save up for a new esc I suppose. Unless I can come up with a better idea.

A poor/broken solder joint could cause the stuttering and overheating issues. Other than that, possibly some internals in the esc are letting go.

I'm pretty sure it's not my solder joints I have to do a lot of soldering at work I'm really leaning towards esc internals at this point it's the only thing I can think of that would affect both motors. I'm not sure what kind of voltage I should be getting phase to phase out of the esc but when given throttle I'm only getting around 200mV right now. My thoughts are its getting low voltage from esc which is causing my issues. Iv seen similar things happen in large 3 phase motors at work. Overheating low torque and general assing up. I'm not sure how brushless differs from brushed in this matter but that's all else I can come up with.