Is normal torque model FOC based?

Hi,

Just trying to understand the closed loop torque mode implementation of the controller. I've read that when using Torque mode with a sensored BLDC motor it actually uses FOC control, is it so?

Can this be explained please? I'm using FBL2360. In torque mode the manual shows a simple torque configuration i.e. Torque Command>>PID>>PWM>>Motor and then current feedback like this .

But in FOC section you have given the following detailed block diagram.


So which implementation is it? If it's the simple one then can a detailed block diagram be shared with Torque input ref to the controller and the feedback. Will appreciate any support on this.

Just to add, the the motor has hall effect sensors connected to FBL2360, the controller is set in Trapezoidal mode. So if anyone can help explain the torque mode implementation with these settings it'll be much appreciated.

syed wrote: Just to add, the the motor has hall effect sensors connected to FBL2360, the controller is set in Trapezoidal mode. So if anyone can help explain the torque mode implementation with these settings it'll be much appreciated.

Just bumping this post with an added question. As per the manual and multiple posts here, the only working parameter seems to be the I-term. Seems like it is a PI controller implemented for the Torque mode. Is this assumption correct ? or is it a PI-PD structure. I'm trying this for a model validation where I have responses from my FBL controllers but they don't seem to match-up well. Any support will be much appreciated....!

Hi syed,
I was surfing through the forum searching for answers for my topic. I have the same application as you, I'm using FBL2360T in trapezoidal mode for brushless motors, and wanted to control them in torque mode. However I'm getting a terrible response even though with very low parameter gains; the motor doesn't rotate properly and oscillates around its target current as well as the current limit. 
I wonder if you got any response to your question or if you figured it out in any way I would much appreciate it!!