BLDC Sensorless initial position HELP

i am doing a project on sensorless control of bldc motor for anna universty. i want to know how to find the initial position of bldc motor while using sensorless drive. right now in my circuit am giving the initial position myself but i want it to detect it automatically plz help me out.........

Answer 1

[Walter Roberson]

<http://ieeexplore.ieee.org/Xplore/login.jsp?url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel5%2F4079749%2F4454722%2F04454728.pdf%3Farnumber%3D4454728&authDecision=-203>

http://www.ijcas.com/admin/paper/files/IJCAS_v6_n4_pp.477-487.pdf

Answer 2

[Toan Thanh Nguyen]

It name align and go method to detect initial rotor position, you can easy search for method