TMS320F28052F Instaspin algorithm migration

Alexandre BALDINO

Other Parts Discussed in Thread: TMS320F28052F, DRV8301, TMS320F28027F

Hi,

I've designed a board with a TMS320F28052F microcontroller.

I've taken the InstaSpin code example which corresponds to this microcontroller (lab03a), and I've added some functions taken from the lab02c dedicated to the TMS320F28027F (I know this works well as I've tested it on the BOOSTXL DRV8301 with TMS320F28027F launchpad).

Among these functions are the SPI driver and the DRV8301 driver.

Parameters of the motor are well estimated (inductance and resistance), so are the bias currents, but bias voltages are different from each phase: 0.1V phase A, 0.5V phase B and 0.15V phase C.

And the motor doesn't spin.

I think the two problems are linked, and if I succeed in resolving the bias voltages, may be motor will goes on.

Please have you got an idea about what happens?

Thank you, Best regards

over 9 years ago

0 ChrisClearman over 9 years ago

TI__Guru** 119680 points

something is wrong with your voltage circuit or the ADC configuration of the 52F. and the motor parameters shouldn't be correct.

which project are you starting with?

0 Alexandre BALDINO over 9 years ago in reply to ChrisClearman

Intellectual 530 points

Hi Chris,

I started with the 52F LAB03a project, comparing it with 27F lab02c project.

I finally found the AFE wasn't initialized, and I had some ADC with PGA connected to the voltage circuit.

As I have designed analog voltage sensing with redundancy, I have changed the ADC channels to run without PGA.

Now it works!

We also have modified some software parts, like linker file, and added some functions that didn't exist.

I've tried two different brushless motors, both spin.

Thank you for your support.

Best regards

0 ChrisClearman over 9 years ago in reply to Alexandre BALDINO

TI__Guru** 119680 points

glad to hear!

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TMS320F28052F Instaspin algorithm migration