motor temps

[studysession]

What is considered to hot for an electric motor? I have a Lehner brushless motor and want to know what temp is to hot?

[Dave Treacy]

if you can hold it for 2 secs after its run then it's about right!

[marcoski]

Brushless motors should not really get too hot, as it is damaging to the magnets on the rotor - I would say 50 degrees would be a maximum limit.

[MikeS]

Keith, a suitably gear BL motor should never get HOT to the touch, warm yes but not hot! If it is you are over geared.

<Edit> Sorry, Marcus got there first.

[marcoski]

LOL!!! You seen the size of that motor, in another thread he states its 700W @ 55A - what a monster!

[WHL]

I've got a Novak BL system and although the motor gets only warm, the speedo gets VERY hot. Especially when your doing alot of braking.

Is this normal for the Novak system? ???

[marcoski]

If you do lots of braking, then yes it will get warm, its got a lot of work to do driving the three windings at the same time. I installed a mini fan onto my heatsink to combat that effect.

[studysession]

Thanks for the info - Are fans easy to install on the car? Can you post a pic of what it looks like when it is installed?

I have a long stretch of road next to work that I will be doing my tests on. I am going to do some speed test and learn what gearing does what and how many batteries do what.

I have a couple of temp guns, so I can check temp easily. I ordered a Venom Speed Meter to get acurate speed measurements. So I think this will be interesting when the speed meter arrives.

[marcoski]

Here it is...

[studysession]

Cool! Thanks!