do brushless motors lose performance over time?
#1
do brushless motors lose performance over time?
I tried doing a search first, however could not find what I was looking for.
Do brushless motors deteriorate over time?
I'm thinking of buying 2nd hand brushless motors rather than new ones.
Do brushless motors deteriorate over time?
I'm thinking of buying 2nd hand brushless motors rather than new ones.
#2
they can lose some performance overtime... but the last a loooonnnggg time!
#4
Tech Initiate
the bearings can go, so check to see if there crunchy. The rotor is a magnet, and magnets can loose there strength over time and when exposed to heat. that being said, the symptoms would be a less torquey motor that runs a bit hotter, which would be impossible to diagnose.
generally if it runs, its ok.
generally if it runs, its ok.
#5
Tech Lord
iTrader: (21)
The thing you want to avoid are ones that have been run hot. You can run a brushless, not really knowing what you're doing and get it so hot that you demag the magnet and it's finished. Heat is also hard on the brgs.
Avoid anything that looks like its been hot. Check how well it spins - its its nor smmoth, I wouldn't consider it. I've had mixed results with used - 50%, one was good the other was short lived and didn't last a month. I buy new unless its someone I know or get to try it or see it run 1st.
Avoid anything that looks like its been hot. Check how well it spins - its its nor smmoth, I wouldn't consider it. I've had mixed results with used - 50%, one was good the other was short lived and didn't last a month. I buy new unless its someone I know or get to try it or see it run 1st.
#6
i had a bearing on my BL motor totally seized. it got really hot and caused the speedie to thermal. i thought it was a terminal failure but after a quick bearing swop, everything was good to go
if the rotor is the magnet, does that mean a rotor replacement = new lease of life? equivalent to replacing the brushed motor comm?
if the rotor is the magnet, does that mean a rotor replacement = new lease of life? equivalent to replacing the brushed motor comm?
#7
Tech Fanatic
iTrader: (1)
I really wouldn't worry about heat on a brushless. Has your brushless motor ever gotten weaker or slower after an extended run where it got really hot? None of mine have!! A sintered neodymium rotor has to get pretty hot--hotter than you would run a motor even in summer under a big load to lose any appreciable magnet strength. A bonded rotor might start falling apart but a good sintered heat really isn't an issue.
Keep fresh bearings in the motor and in theory you shouldn't lose any strength. The resistance in the windings shouldn't change.
Keep fresh bearings in the motor and in theory you shouldn't lose any strength. The resistance in the windings shouldn't change.
#8
Tech Fanatic
iTrader: (1)
Yes and not. New rotor helps to bring new life to motor if winds in can aren't damaged. And it's not completely equivalent to replacing comm in brushed motor - in brushed motor magnets degrade faster and you can't change them, more equivalent is comm change and magnets zap - but that's almost new motor
#13
Since we're at this topic,
is it a good idea to pull out the rotor for cleaning? Will it affect the magnetism or something?
With all the off-road we ran, and my motor being a Orion (with open ventilation slots), I believe quite a bit of dust will be trapped inside the motor.
Also, just want to find out how often you guys clean n lube the bearings?
is it a good idea to pull out the rotor for cleaning? Will it affect the magnetism or something?
With all the off-road we ran, and my motor being a Orion (with open ventilation slots), I believe quite a bit of dust will be trapped inside the motor.
Also, just want to find out how often you guys clean n lube the bearings?
#14
Tech Regular
How hot is too hot? 180F?