how to drive Sinusoidal Sensorless 3-Phase Brushless DC (BLDC) ?

thank you for valuable reply ,
basically i want to drive BLDC ceiling Fan . when i google it i see most of the application note or data used sinusoidal method to drive BLDC fan . And the rpm of fan is up to 400. So i want to drive this fan motor with sinusoidal . i confuse which method used?

Sorry for poor English
thank you
kalpesh