Sensorless BLDC Motor Driver for Drones

Hi everyone, i am Electrical Engineering student at Istanbul Technical University in Turkey.


I've designed a PCB which drives the low voltage Brushless Direct Current Motor used in drones without sensors. With the help of the ASIC microcontroller ML4425, sensing the back EMF and phase currents provided in the PCB. I've added 10k potentiometer for adjusting the speed of BLDC motor. We supply +24 V to the high side MOSFETs and +12 V to the low side MOSFETs. You can add heatsink to the MOSFETs if it is necessary in your project. Here is the schematic:


Here is the Bill of Materials:




Here is the PCB layout:



And here is the 3D:



Since it is my first project, i'll really appreciate support of PCBWAY, thank you for helping me as an engineering student.

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Dec 26,2020
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