Hi, i want to make my own version of brushless gimbal. For first step i want to know how to control brushless motor, especially for direction control. Is there any reference that i can learn?
The direction control per se comes from commutating the ends of the three windings in such order that the rotor can only follow it in one direction. Three phase brushless DC motors like the one you're planning on using can turn in either direction - basically, you can switch the direction by connecting it's leads like A-C-B instead of A-B-C .
For a general reference on how to drive these in a position - holding mode, such as what will be needed for the gimball project, you can check out this b
rushless DC driving animation/diagram here.
Thank you for the link to the motor, by the way - I had no idea brushless DC gimballs - an absolutely obscure and unique item only 6 months ago - have become so mainstream that there are already specialized high-Ohm motors for that.
I don't have the ready-to-go software for driving gimballs specifically but I can refer you to this post here where I describe
software and hardware for driving brushless DC motors with PWM - this is the technique that was used in the BLDC gimball implementations I've seen so far. You can use it to adapt to the gimball application.
I am very interested in learning how you did with the project and will be happy to help you along any way I can. be sure to post more about your progress!
Cheers!