Saturation Limit for Speed and Current Control in IPMSM

9 次查看(过去 30 天)
Hi,
I am working on FOC of IPMSM. I am using three PI controllers. One for speed control and two for current control (id and iq).
My question is:
  1. How to design practical saturation limit of PI control for speed control and
  2. How to design practical saturation limit of PI control for id and iq control

回答(1 个)

Dakai Hu
Dakai Hu 2021-5-28
Hello Sanjeev,
Here is something to consider for the questions you asked:
  1. How to design practical saturation limit of PI control for speed control
The output of your speed loop's PI controller is a current command for Iq, or for both Id and Iq. Particularly for IPMSM, Id current command should always be negative (or 0). If you know the current constraint Ismax for your current loop, then a practical saturation limit for the speed loop's PI should be Iq: [-Ismax, Ismax]. Id: [-Ismax, 0].
  1. How to design practical saturation limit of PI control for id and iq control
The output of your current loop's PI is voltage reference Vd and Vq. If you are not using a per-unitized system, then the constraint for Vd and Vq depends on the PWM strategy you are adopting. For SVPWM, the linear maximum modulation voltage is calculated by Vdc/sqrt(3). Therefore the saturation limit for both current loop PI controllers should be [-Vdc/sqrt(3), Vdc/sqrt(3)].

类别

Help CenterFile Exchange 中查找有关 Control Algorithm Design 的更多信息

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by