CCS/LAUNCHXL-F28069M: Replace align and go startup method for lab12b

Kalpesh Mhase

Tool/software: Code Composer Studio

Hello,

I am running our motor using Lab12b with a quadrature encoder (AMT-103v) and everything is working fine.

But initially, the motor has to align to its zero angle. So the motor rotates for some time and stops. Then the motor stars running normally.

This is an unwanted phenomenon for our application and we want the motor to start directly with torque control with very less or no delay.

I was checking about IPD & HFI algorithm mentioned in lab21 but our motor is non-salient pole motor and according to this post if the motor does not have any saliency, the HFI technique will not be successful.

So is there any way out?

Please help.

over 6 years ago

0 Kalpesh Mhase over 6 years ago

Intellectual 825 points

Please, can anyone help..!!!

0 Yanming Luo over 6 years ago in reply to Kalpesh Mhase

TI__Guru** 111130 points

HFI can's support all PMSM, especially SPM. For incremental encoder, you have to use the align method for zero offset calibration when the first power on. Unless you use the absolute encoder or incremental encoder with U/V/W signal output.

0 Kalpesh Mhase over 6 years ago in reply to Yanming Luo

Intellectual 825 points

Really thank you for the reply Yanming,

Is it HFI can't support all PMSM?

And also wanted to clear that can it be solved by sin/cos encoder?

If yes then what I might need to do(i.e. use TIDUA05A) to make it work?

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CCS/LAUNCHXL-F28069M: Replace align and go startup method for lab12b