LAUNCHXL-F280039C: Universal motor control lab - sensored FOC using Encoder

Arun Ashok

Part Number: LAUNCHXL-F280039C
Other Parts Discussed in Thread: MOTORWARE

Hi Team,

I am using CCS12.2 with motorware SDK v4.01.00.00. I was able to run FOC sensorless (DMC_level_4) using Teknik 2310LP-LN-04K motor on F280039C Launchpad and 3 phase GaN INV by following the steps given in the lab guide.

However I am not able to run sensored FOC for the same setup with the encoder settings defined by default for Teknik motor. I have enabled the corresponding predefined symbols as defined in the guide.

In FAST estimator mode my speed feedback matches my reference speed in DMC LEVEL 4 and the angle_FOC_rad keeps changing (angle ENC rad = 0).

However in ENC estimator mode, my speed feedback and angle_ENC_rad parameters are always 0 and the DC power supply consumes way higher current than sensorless FOC. Any help in figuring out what the issue could be? Also with the new structure of UMCL can you point out the code location where QEP GPIOs are set, QEP CLK enabled and QEP Angle is provided to FOC handle?

Thanks,

over 2 years ago

0 Yanming Luo over 2 years ago

TI__Guru** 116090 points

Please take a look at the C2000 F28003x Series LaunchPad Development Kit to connect the encoder to the right header (J12/EQEP1), and set the switch (S5/QEP select) to the J12/J13 side) for mapping the GPIO to J12/J13.

0 Arun Ashok over 2 years ago in reply to Yanming Luo

Prodigy 90 points

S5 switch was already set down to (J12/J13) and encoder connected to J12. I am not sure if connection is the issue.

Also with the new structure of UMCL can you point out the code location where QEP GPIOs are set, QEP CLK enabled and QEP Angle is provided to FOC handle?

0 Yanming Luo over 2 years ago in reply to Arun Ashok

TI__Guru** 116090 points

You may check if the output signals of the encoder are correct on J12.

The QEP and GPIO configuration codes are in the hal.c file, and the definitions for GPIO and QEP in hal.h.

0 Arun Ashok over 2 years ago in reply to Yanming Luo

Prodigy 90 points

I finally figured it out. I am using a USB isolator to power the F280039C launchpad and had disconnected both jumpers in JP2 on launchpad and connected jumper J5 on the 3ph GaN INV board. As a result, the processor was getting 3.3V from the GaNINV board but the connectors J12 and J13 were not getting the required 5V supply. In this configuration sensorless FOC will obviously work.

The solution to get it running was to disconnect J5 on GaNINV board (SLUUBP1A wrongly refers to it as J6 on page 7, unless there is a new board revision) and connect J2 on Launchpad.

0 Yanming Luo over 2 years ago in reply to Arun Ashok

TI__Guru** 116090 points

Good to know. We will add a note for this in lab user's guide if possible. Thanks!.

C2000™︎ microcontrollers

C2000 microcontrollers forum

LAUNCHXL-F280039C: Universal motor control lab - sensored FOC using Encoder