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Whenever I purchase a used motor, I plug it into the nearest ESC to check that it works properly. Well this time that process didn't go so well.
I powered on the ESC, checked that steering worked, and then gave about 50% throttle. The naked motor shaft started spinning for 1-2 seconds and then poof. Lots of smoke and sizzling noises from the ESC. I quickly unplugged everything and threw the car and battery in the yard.
ESC damage: two motor bullets completely detached. The negative battery wire detached from the ESC and the positive battery wire detached from the connector. All were clean breaks - it got hot enough to melt the solder.
Motor damage: a little charring near the bullets. Nothing serious. I can't find anything wrong inside the motor.
Battery damage: none that I can tell. It was warm but cooled down quickly. Cells are balanced at 3.8V.
56113 780kv motor
MMX6S ESC
HRB 6S 5ah 60C
EC5 connectors
I have some questions about what to do next:
1. I assumed the current demand would be minimal under no load and therefore safe for that ESC (even with a huge motor) - was that assumption wrong?
2. Can a defective motor cause this problem? How should I inspect the motor?
3. Can a defective battery cause this problem?
4. How can I troubleshoot further without risking another ESC?
I powered on the ESC, checked that steering worked, and then gave about 50% throttle. The naked motor shaft started spinning for 1-2 seconds and then poof. Lots of smoke and sizzling noises from the ESC. I quickly unplugged everything and threw the car and battery in the yard.
ESC damage: two motor bullets completely detached. The negative battery wire detached from the ESC and the positive battery wire detached from the connector. All were clean breaks - it got hot enough to melt the solder.
Motor damage: a little charring near the bullets. Nothing serious. I can't find anything wrong inside the motor.
Battery damage: none that I can tell. It was warm but cooled down quickly. Cells are balanced at 3.8V.
56113 780kv motor
MMX6S ESC
HRB 6S 5ah 60C
EC5 connectors
I have some questions about what to do next:
1. I assumed the current demand would be minimal under no load and therefore safe for that ESC (even with a huge motor) - was that assumption wrong?
2. Can a defective motor cause this problem? How should I inspect the motor?
3. Can a defective battery cause this problem?
4. How can I troubleshoot further without risking another ESC?
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