respected sir,
I am M.Tech student, simulating in matlab on field oriented control (vector control) (d,q compensation) of 3- phase IM using multi-level inverter.
In this simulation, direct axis stator current ids (rotor flux producing component) and the quadrature axis stator current iqs (Torque producing component) must be controlled independently.after converting those ids and iqs into votage form Vds and Vqs (say Vds-lin and Vqs-lin) using PI controller, have to DECOUPLE to generate Vds* and Vqs* (transformation for non linear motor model to linear equation),after that this Vds*, Vqs* have to transfer into Vabc using Inverse Park Transformation (dq-abc) as input of PWM generator to generate pulse of Inverter.
Now i am facing a problem in DECOUPLING control portion.I dont know the algorithm of Decoupling control or how to design that algorithm.But i have collected some equation for that from a paper but after design that equation in subsystem ,the output of the inverter is not coming correctly so that machine is not working properly.
(N:B: I have simulated Field oriented control algorithm without Decoupling control )
So Please help me sir "How to calculate or how to design the DECOUPLING Algorithm " for dq compensation of Induction Motor.
Thanks you
Yours Obediently..
Hello my friend.
Look at attached document. I think this would help you.
Brother,
Its better that you should model the equations of the system i,e. transfer function in 's' domain then you can use PSIM and Smartctrl software along with Matlab simulink to plot the obtained transfer function and then you can check the bode plots in smartctrl and select a point where your system is stable. Then you can obtain the Kp, Ki, and Kd values for the PI controller for your system
see
https://www.researchgate.net/publication/222352946_Design_of_a_speed_controller_for_a_squirrel-cage_induction_motor_using_field-oriented_control?ev=prf_pub
Article Design of a speed controller for a squirrel-cage induction m...
u send ur problem at [email protected], i have guided MTech student on this project in session. if u required then i send u my model for FOC for induction motor.
- Badges
- Science topic