BRUSHLESS EMERGENCY
02-14-2005, 12:39 AM
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BRUSHLESS EMERGENCY
well this is my sad history...
today at the morning i was hovering my plane, in my Club, just like another day, then when i finished, i did others things, and forgot disconnect the batterie (TP 3s 1320, i bought it 5 days ago) from the ESC(e-flite 20amp.).
i took notice of this 6 hours later. when i connected it to the charger, it didn´t recognize the battery,(i was very scare), the batterie was completly dead, i checked it whit my voltimetter and it marked around 4 volts (i was almost crying). after that, i remembered that my charger(e-flite celectra) has an option to charge batteries even when they are over discharged... after some minutes i stopped it and test it whit the voltimetter
and it showed 11.1 volts (a big smiley was in my face), i charged it normally whit the charger... when it was completly charged, i connected them to the plane and tested them, the motor(PJS 3D 500) was running perfect but a few seconds later i detected that some smoke was going out from my brushless(i can´t believe it) the motor was very very hot, i disconnected the batterie and let the airplane in a fresh place, now i´m waiting it get cool, i´m very concern about this situation, now we are talking about my batterie and my brushless... i won´t use that batteries, but can you tell me if the motor is damaged, what should i do..?
today at the morning i was hovering my plane, in my Club, just like another day, then when i finished, i did others things, and forgot disconnect the batterie (TP 3s 1320, i bought it 5 days ago) from the ESC(e-flite 20amp.).
i took notice of this 6 hours later. when i connected it to the charger, it didn´t recognize the battery,(i was very scare), the batterie was completly dead, i checked it whit my voltimetter and it marked around 4 volts (i was almost crying). after that, i remembered that my charger(e-flite celectra) has an option to charge batteries even when they are over discharged... after some minutes i stopped it and test it whit the voltimetter
and it showed 11.1 volts (a big smiley was in my face), i charged it normally whit the charger... when it was completly charged, i connected them to the plane and tested them, the motor(PJS 3D 500) was running perfect but a few seconds later i detected that some smoke was going out from my brushless(i can´t believe it) the motor was very very hot, i disconnected the batterie and let the airplane in a fresh place, now i´m waiting it get cool, i´m very concern about this situation, now we are talking about my batterie and my brushless... i won´t use that batteries, but can you tell me if the motor is damaged, what should i do..?
02-14-2005, 12:48 AM
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RE: BRUSHLESS EMERGENCY
if smoke was coming out of your motor, that means you were melting the enamel coating on the wires and are risking a short.
however, NEVER charge a lipo that has been over-discharged. i dont know what it is that those chargers do, but i have heard a lot of bad things about re-juvinating batteries that way. what type of motor is it? maybe you can re-wind it or something?
however, NEVER charge a lipo that has been over-discharged. i dont know what it is that those chargers do, but i have heard a lot of bad things about re-juvinating batteries that way. what type of motor is it? maybe you can re-wind it or something?
02-14-2005, 11:33 AM
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RE: BRUSHLESS EMERGENCY
Yes, smoke is usually fatal for electronic components. You will probably need a new motor.
Perhaps leaving the pack connected for a long period of time caused one of the windings to heat up just enough to damage it, and normal use overstressed it. Or, it was just a coincedence...
Two things to remember:
1. ALWAYS disconnect the pack after EVERY flight.
2. NEVER do extended runs on the ground. That causes the motor to overheat.
Perhaps leaving the pack connected for a long period of time caused one of the windings to heat up just enough to damage it, and normal use overstressed it. Or, it was just a coincedence...
Two things to remember:
1. ALWAYS disconnect the pack after EVERY flight.
2. NEVER do extended runs on the ground. That causes the motor to overheat.
