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TMS320F28069: DRV 8312 Pm Sensorless Project

Part Number: TMS320F28069
Other Parts Discussed in Thread: DRV8312, STRIKE, DRV8412, CONTROLSUITE

I am trying to run PM Sensorless project with TMS320F28069 on DRV8312 and facing following issue.

1. at project level 1 when I am checking the PWM A, B and C on oscilloscope I don't get any pwm on DRV8312 board however when I mount my TMS320F28069 on seperate docking station I am Getting PWMB and C but PWM A is not coming ( I see a pwm like waveform on PWM A as well but amplitude is very low)

I am unable to make any conclusions and would require some help how to debug this issue.

Just to strike down any issue with DRV8312 I have successfully ran other bldc project and I am getting all pwm and motor is running.

One solution that I am trying to evaluate is follows and have following question

1. I am trying to replace pwm module of PWM a in SW with some other module for that what hardware changes will be required?

2. When I open PM sensorless project I see a comment at top mentioning software is developed for DRV8412 but project document and all refer to DRV8312

kindly guide me so that I can debug my issue.

Thanking in advance

  • Please take a look at the user's guide of the DRV8312 board, make sure that you add the right power supply to the board and set the related switches on the board correctly.

    1. I am trying to replace pwm module of PWM a in SW with some other module for that what hardware changes will be required?

    Not necessary. You can just use the example in C:\ti\controlSUITE\development_kits\DRV8312-C2-KIT_v128\PM_Sensorless that works for this kit.

    2. When I open PM sensorless project I see a comment at top mentioning software is developed for DRV8412 but project document and all refer to DRV8312

    Seems like the two examples shared the same file without changing the comments.