Three-phase SRF phase-locked loop problem

Annie Liu

HI Team,

There is derivation process of Software Phase Locked Loop Design in the reference manual. The customer would like to know how to get the formula inside the blue circle?

over 6 years ago

0 LeonardEllis over 6 years ago

TI__Guru 71526 points

Hi Annie,

What Reference Manual you referred to is this from?

~Leonard

0 Annie Liu over 6 years ago in reply to LeonardEllis

TI__Genius 10295 points

Hi Leonard,

Customer referenced below document.
www.ti.com/.../sprabt4a.pdf

Thanks.

Rgds
Annie

0 Pierre Bouchet1 over 6 years ago

Expert 2605 points

Hi Annie,

If you are looking for the origin of the expression inside the blue circle the wikipedia entry for the bilinear transform describes all the calculation steps. It's a useful tool to synthesize a discrete-time controller from a continuous-time transfer function.

Regards,

0 Manish Bhardwaj over 6 years ago in reply to Pierre Bouchet1

TI__Mastermind 43730 points

As pierre mentioned, it is standard blinear transformation.

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Three-phase SRF phase-locked loop problem