Other Parts Discussed in Thread: C2000WARE, MOTORWARE, C2000WARE-MOTORCONTROL-SDK
We have been developing a controller for an e-bike for about a year and have had many challenges using Instaspin-FOC. Our hardware has a TMS320F28069M and a DRV8353RS driving a 60V 65A inverter. Most of our challenges involve the FAST observer losing stability at high current and the speed estimate diverging from reality. This causes the current PI controller to spike and triggers DRV overcurrent protection faults. We are wondering if we could improve the stability of our controller by switching our hardware to the TMS320F28004x family of microcontrollers.
We have read through "SPRT731A - TMS320F28004x Microcontroller: A Comparison to the TMS320F2806x Microcontrollers" and determined that the hardware changes could potentially make small improvements to our sampling. This document has limited insight into changes to the TI provided software.
We are mostly interested in updates to the FAST observer in ROM and if this has become more robust. Can TI comment if there have been improvements to FAST?
We are also considering migrating to the newer chip if TI is prioritizing design support over the older generation of chips.
At the time of writing this post, the newer generation of microcontrollers including the TMS320F28004x are out of stock from legitimate vendors. Our other thought is to port the latest version of C2000ware for our system since there are improvements over the older MOTORware software (e.g. automatic field weakening is now in a PI loop). Is there any ongoing effort to make C2000ware compatible with the F28069?