SPRUHJ1I January 2013 – October 2021 TMS320F2802-Q1 , TMS320F28026-Q1 , TMS320F28026F , TMS320F28027-Q1 , TMS320F28027F , TMS320F28027F-Q1 , TMS320F28052-Q1 , TMS320F28052F , TMS320F28052F-Q1 , TMS320F28052M , TMS320F28052M-Q1 , TMS320F28054-Q1 , TMS320F28054F , TMS320F28054F-Q1 , TMS320F28054M , TMS320F28054M-Q1 , TMS320F2806-Q1 , TMS320F28062-Q1 , TMS320F28062F , TMS320F28062F-Q1 , TMS320F28068F , TMS320F28068M , TMS320F28069-Q1 , TMS320F28069F , TMS320F28069F-Q1 , TMS320F28069M , TMS320F28069M-Q1
Let's see how the different PI tuning topics we have discussed so far apply to Field-Oriented Control (FOC) systems. Figure 12-18 shows a typical field oriented system which utilizes three PI controllers: two for controlling the quadrature components of current, and one for controlling the speed.
The design of the speed controller doesn't change much in a field oriented system compared to other control algorithms. Just make sure to use the q-axis current controller values when calculating the coefficients for the speed controller. But there a subtle differences which affect how the current controllers should be designed, which are covered next.