[help] bldc motor couldn't start rotating without first trigger

[etiquoe]

hi,
i'm trying to build 3 phases bldc motor driver (24 V). i'm using 3 hall sensors (separated 120 degrees each other) for rotor position detecting. But the motor almost always doesn't start rotating without triggered by hand first. only in few times it can start rotate without hand trigger.

i've checked the commutation sequence. i think that's okay.
i don't know what's the problem,
could anyone help please???

 

[john blue]

Check again your sequence. Sometimes you think it will work that way but it wont =)