how hot is too hot for a motor?

dtbaker said:

I just happened to check temp on motor today w/ infrared sensor (el cheapo from harbor freight0 after driving around for errands.... ambient was about 85F, motor was about 125-130F. ok?

how about controller? hot spot on casing was about 110 ....

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as usual it depends on several factors.

the weak part in a BLDC-motor are the magnets.
when they get to hot, they will be unmagnetized...

there are different magnets on the market...the cheapest start to unmagnetize @80°C and the best can hold up 200°C

dtbaker said:

I just happened to check temp on motor today w/ infrared sensor (el cheapo from harbor freight0 after driving around for errands.... ambient was about 85F, motor was about 125-130F. ok?

how about controller? hot spot on casing was about 110 ....

Click to expand...

IF its a DCBL motor the magnets are starting to getting damaged after 170 Degrees(F)

Pirape said:

IF its a DCBL motor the magnets are starting to getting damaged after 170 Degrees(F)

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100-140 is perfect for electric motors