Has anyone have any idea about driving a three or four phase brushless DC motor that does NOT has hall sensors using an AVR microcontroller?
I got a three phase brushless DC motor that i scavenged from a Dead Hard Disk Drive and some MCUs like ATMEGA8 and 16
Anyone got any idea how to drive it using the back emf as feedback (I think that's the only way to drive a sensorless BLDC motor
what I found is you need to measure the back emf from the coils to approximate the rotor position and then time your commutation (current supply),also you need to condition the feedback so that it won't blow up your MCU's ADC !But I don't know how to wire it all up
any help would be appreciated