CCS/DRV8312-C2-KIT: C2000-DIGITAL-CONTROL-LIBRARY

Chen Li7

Prodigy 90 points

Part Number: DRV8312-C2-KIT

Tool/software: Code Composer Studio

I have some confusions about the coefficients of PID controller in the BLDC_Sensorless code.

pid1_idc.param.Kp = _IQ(3.176*BASE_CURRENT/BASE_VOLTAGE);

pid1_idc.param.Ki = _IQ(T/0.0005);

pid1_spd.param.Kp = _IQ(0.75);

pid1_spd.param.Ki = _IQ(T/0.3);

Could you tell why there is a coefficient of 3.176 in Kp, and why Ki is set as T/0.0005? Do you have some derivations about these?

Thanks

Chen Li

over 6 years ago

0 Ramesh Ramamoorthy over 6 years ago

TI__Mastermind 27240 points

This is a old code and the engineers that wrote this are not around. If I were to make a guess, these are direct values of various parameters, and while representing in digital domain and that too in per unit, such equations needed to be written.

0 Ramesh Ramamoorthy over 6 years ago in reply to Ramesh Ramamoorthy

TI__Mastermind 27240 points

Let us know if you are able to proceed further with this. If the issue is resolved, pls close the thread.

0 Ramesh Ramamoorthy over 6 years ago in reply to Ramesh Ramamoorthy

TI__Mastermind 27240 points

Am closing the thread for lack of response.

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