LAUNCHXL F28379D + BOOSTXL-DRV8305EVM + PMSM not working in closed loop

Hello, I am using simulink and f28379D launchpad to control PMSM motor for MATLAB examples. hardware description: LAUNCHXL F28379D+ BOOSTXL-DRV8305EVM+Teknic 2310P SPMSM+ 24V,10A Regulated DC Power Supply software description: matlab2020b+simulink+CCS v7.4+Controlsuite3.4.9+Embedded Coder Support Package for Texas Instruments C2000 Processors et.al program description: mcb_pmsm_foc_qep_f28379d and mcb_param_est_f28379D_DRV8305 et.al When I try to run my simulink model on TI launchpad F28379D, it is built into lauchpad sucessfully. but when I try to control the motor by the host model(serial communication between lauchpad and PC), the following is the result.

The host is running and motor starts rotating when the switch is on No feedback signals are coming to host. I think that the motor is running in openLoop and not shifting to closed loop What should be done? And what may be the reason?

[Keyur Mistry]

Hello,

Please share the screenshots of the observations. It will help us to debug the problem.

Regards.

[S Saha]

Here is the screenshot of graphcal observation.....but the motor is running....but not following the ref. command..

[S Saha]

The above is the screenshot of graphical result....but the motor is running....but not following the speed command...

[Keyur Mistry]

I am assuming that motor is running only when you toggle the "Start/Srop Motor" switch, which means communication from host model to hardware is working fine.

Through motor is running, you are observing zero speed in the scope of the host model. Few possible reasons:-

1. Communication from hardware to host model is not working fine.
2. Speed calculation is not happening correctly in hardware.

To elemenate the first possible reason check mask parameters of "mcb_pmsm_foc_host_model_f28379d/Rx/Host Serial Receive/Data_Type_Float/Host Serial Receive" (for floating datatype) or "mcb_pmsm_foc_host_model_f28379d/Rx/Host Serial Receive/Data_Type_Fixed_Point/Host Serial Receive" (for fixedpoint datatype). Value of "Action when data is not available" should be "Output custom value" and value of "Custom value" should not be "4".

If communication from hardware to host model will not work or data is not available then the scope of the host model should give "4".

Let me know if it helps you to narrow down the problem statement.

[S Saha]

The following Figure shows the default mask parametrs of "mcb_pmsm_foc_host_model_f28379d/Rx/Host Serial Receive/Data_Type_Float/Host Serial Receive" (for floating datatype) as suggested by you.

[S Saha]

I have checked the setup according to your suggestion but the SCOPE of the host model is not giving "4" rather it is giving zero signal.

This time I have used f28069M launchpad to control the same PMSM motor and everything is ok and signals are coming to host model as desired.

But the same problem persist with f28379D launchpad.

Answer 1

[Mao Rothdamrong]

I went to get this simulation form you.