Hello,
Can anyone help on this request?
BLDC Shorting out microcontroller
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BLDC Shorting out microcontroller
ElectromechanicalMotors, Actuators, Solenoids and Drivers
1 / 1
Nov 25
I am currently working on a BLDC motor controller board with an STM32. Right now the STM32, the gate driver and the BLDC power are all powered by the same battery. I have an LED indicator which turns on when it is currently working, but as I turn it on, the LED immediately shuts off, with a couple of the MOSFETs’ flyback diodes blowing.
I’m sure my design works, since I used a very similar design with an arduino and gate driver powered externally.
I did later realise that in the datasheet it says the MCU should be powered by an external supply.
I have a couple questions about this.
- Why does the motor short it? Just because it is high current doesn’t necessarily mean its a short circuit?
- How do ESCs power a motor using one power supply for mcu, gate driver and bldc without having this issue? Is there any way to do this?
There is more in the actual post