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Motor Overheating

Mattcity

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Hi All,

I have the Hobbywing MAX8 Plus/Supras Taurus Rocket 1950Kv 4274 combo in my EB48 2.0.
For the past 2 race meeting I suspect I have overheated in the finals. Motor stops but steering still functions. Not a battery issue as plenty of charge in them. not an issue in 6 min heats, only after 8-9mins running.
How can I diagnose and how can I overcome.
Racing in the UK so it was warm these last two weeks (20C maybe) but not excessive.

cheers

Matt
 

Matthew_Armeni

Tekno RC Staff
Tekno RC Staff
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Are you sure it's the motor and not the esc? A 74mm long motor should have plenty of power. And 20C is not warm enough to cause any issues. Check your esc and see if you have any settings for motor and esc Temps, they may be set too low.

You could also be hitting low voltage cutoff. HW escs have a sensitive LVC and if you're only racing for 10 minutes you can probably safely disable it. Just make sure you know that your batteries are good enough.

Also what pinion are you running?
 

crashr30

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I am interested to see where this goes. I had the same problem in my Truggy. I have raced it for over 2 years and all of a sudden it started overheating as well. I went through the entire drive train and changed bearings and rebuilt diffs. I went both up and down in pinions and it helped a little but I still had motor temps about 230 F. I have changed motors two different times and I have changed speed controls as well. I had to have missed something because it never did get corrected. Just out of curiosity do you use a Futaba transmitter and if so do you use the 70/30 throttle configuration? I am not saying that is it but that is what I am doing and I wonder if it could somehow contribute to the issue. Yes, I am digging into minute details at this point.
 

PaDDy Killer

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I'm also interested where this goes. I am also having heating issues with the new to me 48 2.0. Two Tekin gen 3 esc down in two weekends. 2050 tekin to a 16t pinion. I have also checked the drivetrain for binding. Installing a hobbywing tonight.
 

Mattcity

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Managed to get some great help from one of the UK team drivers.
See the attached screen shot.
Might help.
IMG_0101.jpeg
 
Last edited:

Mattcity

Member
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I am interested to see where this goes. I had the same problem in my Truggy. I have raced it for over 2 years and all of a sudden it started overheating as well. I went through the entire drive train and changed bearings and rebuilt diffs. I went both up and down in pinions and it helped a little but I still had motor temps about 230 F. I have changed motors two different times and I have changed speed controls as well. I had to have missed something because it never did get corrected. Just out of curiosity do you use a Futaba transmitter and if so do you use the 70/30 throttle configuration? I am not saying that is it but that is what I am doing and I wonder if it could somehow contribute to the issue. Yes, I am digging into minute details at this point.
Sorry using the Flysky NB4.
 

Mattcity

Member
Messages
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Are you sure it's the motor and not the esc? A 74mm long motor should have plenty of power. And 20C is not warm enough to cause any issues. Check your esc and see if you have any settings for motor and esc Temps, they may be set too low.

You could also be hitting low voltage cutoff. HW escs have a sensitive LVC and if you're only racing for 10 minutes you can probably safely disable it. Just make sure you know that your batteries are good enough.

Also what pinion are you running?
Don't think its the ESC, ran several XR8 plus with HW Motors, in a couple of JQs, with same settings, no issues. Only seen this with the HW/Taurus combo so might be the Taurus just runs hotter as per the advice I got.
 

Mustang76

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I'm also interested where this goes. I am also having heating issues with the new to me 48 2.0. Two Tekin gen 3 esc down in two weekends. 2050 tekin to a 16t pinion. I have also checked the drivetrain for binding. Installing a hobbywing tonight.
Are you running in sensored or sensorless mode?
 

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