BLDC motor beeps hard, heats up and then smokes

November 7, 2024, 10:18

_krazy.

Hey, I've been in the last month making a drone using ESP32, I've a BLDC motor 1100kv, ESC 30A and a li-po 2200mA 40C, everything used to work, but after buying a power distribution board from Ali Express (unsoldered) I soldered the banana plug T60 or wrong :), plugged the power dist board 3 times with ESC soldered with motor and burned the power dist board on the first time, got sad and went to purchase another, after ~2 weeks tried the new power dist board and it worked but the beeping is so hard and doesn't stop even after receiving PWM signal from microcontroller, and heats up quite fast and then smokes a bit after ~15s, tried it about 3 times, then diagnosed the power dist board using a multimeter and everything works as intended, even the integrated UBEC 5V, I believe the motor or ESC is bad, so which one it is? I'm afraid to try the motor and then it breaks the ESC or the opposite and break good parts. The power distribution board used is the one in the image.

oops.se

Without measuring or using a power supply with current limiting capability it is impossible to say if it is the motor or the motor controller!

_krazy.

The ESC was bad, the motor works now!