TMS320F280049: 3 phase ac input - software phase locked loop

Jack Tan80

Part Number: TMS320F280049
Other Parts Discussed in Thread: C2000WARE

Dear C2000 expert,

This docs(http://www.ti.com/lit/an/sprabt4a/sprabt4a.pdf) described about using software phased locked loop for 3 phase input AC. And I'd like to use this spll to reform 3 phases voltage in order to filter out the harmonics and imbalanced.

One of my application, the AC frequency range from 50Hz Tto 200Hz, and the frequency change rate can be reached to 200Hz/s in worst case, is it possible to use this software phase locked loop to reform the voltages signals?

over 5 years ago

0 Manish Bhardwaj over 5 years ago

TI__Mastermind 43730 points

Jack,

We have the MATLAB code in the document pointed above, you can use that to test the PLL under those conditions. This is not something we did on our end.

200Hz/sec is a very fast change for frequency, what is the application here? Are you trying to use this for motor control?

The PLL module is designed for grid connection where the frequency cannot change that fast.

On single phase PLL I did design an FLL based PLL which is available in the C2000ware_digitalpower_sdk

C:/ti/C2000Ware_DigitalPower_SDK_<ver>/docs/html/dplib_html/group___s_p_l_l__1_p_h___s_o_g_i___f_l_l.html

But that wil also not work for a very fast frequency change, though it has frequency locking capability.

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TMS320F280049: 3 phase ac input - software phase locked loop