View Full Version : disconnecting only one motor-esc connector safe?
akshaw
09-03-2010, 09:35 PM
I just got myself curious about this. I've never tried it, but can the motor start up with only one disconnected?
I just got myself curious about this. I've never tried it, but can the motor start up with only one disconnected?
Each pulse though the phase/step still connected should still rotate the motor round, but it will not be smooth or have the speed and power it does with all three phases/steps.
That is, in theory, it's likely that most modern ESC's can detect that and wont run, but I wouldn't just assume that.
Disconnect at least two to be sure of no movement.
Kington99
09-08-2010, 09:50 AM
my stock Algin ESc either can't or won't run with one wire diconeected, I've had a single bullet joint fail a few times and the motor just beeps, whihc makes me think the ESC has sensed this and disabled rather than it just won't work. To be frank you could have found this out a lot quicker just by trying it.
akshaw
09-09-2010, 08:03 PM
Yea, I know. I'm too lazy to actually do it though.
IndyBob
09-11-2010, 09:23 AM
my stock Algin ESc either can't or won't run with one wire diconeected, I've had a single bullet joint fail a few times and the motor just beeps, whihc makes me think the ESC has sensed this and disabled rather than it just won't work. To be frank you could have found this out a lot quicker just by trying it.
People get hurt or break/burn things by "just trying it" sometimes
johnsma22
09-11-2010, 10:35 AM
In my field (hvac tech), I would never work on a three phase motor without making sure that all three legs are disconnected from power. Some manufacturers will cheap out and use a 2 pole contactor to control a 3 phase motor, with one leg being hot at all times. This will keep the motor from running, but it could get you killed if you didn't know that one leg was live.
Also in my trade, losing one leg of a 3 phase power source will cause a single phase condition that can damage components very quickly. That is essentially what you're doing if only removing one lead and then trying to power up the esc. Not a good idea, IMHO.
dfraser
09-14-2010, 03:44 PM
My ESC/motor combo (Scorpion 3026 / MSH/LipoTech ESC) will spin the motor with one lead disconnected. It's not powerful, but it will definitely get the blades moving.