CCS: sensorless control of PMSM

user4866655

Other Parts Discussed in Thread: TMS320F2812, TMS320F28075, TMS320F28377S, CONTROLSUITE

Tool/software: Code Composer Studio

I am doing research on sensorless control of PMSM. I am using TIF2812. What is given in TI document is
sliding mode observer for back emf estimation. It requires low pass filter, I wanted to know how to
calculate cut off frequency of LPF and how to find compensation for theta. Pls if anybody can help me.

over 7 years ago

0 Yanming Luo over 7 years ago

TI__Guru** 115470 points

Calculate a compensate coefficient based on LPF cut off frequency and pwm frequency, and then multiply estimated motor electrical frequency to get the compensated angle. TMS320F2812 is not a recommend device for new design, TMS320F28075 or TMS320F28377S/D has higher performance to replace TMS320F2812.

0 user4866655 over 7 years ago in reply to Yanming Luo

Intellectual 370 points

now, What I actually use is DRV8312-C2-KIT_v128 . mcu is TMS28035. I'm confused with Sliding Mode Current Observer.I want to know the derivation.

0 Luiz Ramelan over 7 years ago in reply to user4866655

Prodigy 190 points

You can check the documentation of math_blocks on controlSUITE\libs\app_libs\motor_control\math_blocks\v4.3\~Docs
particularly on SMO section.

regards
Luiz

0 user4866655 over 7 years ago in reply to Luiz Ramelan

Intellectual 370 points

Thanks a lot ,I found it. It helps me a lot.

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CCS: sensorless control of PMSM