TMS320F28377S: How to calculate the natural frequency(the parameter of DDSRF-PLL's loop filter)

Yale Li 李耀先

Part Number: TMS320F28377S

sprabt4 -- Software Phased-Locked Loop Design Using C2000 Microcontrollers for Three Phase Grid Connected Applications

Thanks & Regards

Yale

0 Pawan Nayak over 1 year ago

Hi Yale,

I need to look into the calculations. Will get back to you by end of this week.

Thanks and regards, Pawan

+1 Pawan Nayak over 1 year ago in reply to Pawan Nayak

Hi Yale,

The below equation can be further expanded

The below term is equal to error band

After substituting error band 5% = 0.05, damping of 0.7, t equals settling time of 30ms, you can get the natural frequency.

Thanks and regards, Pawan

C2000 microcontrollers forum