Support required on given Vienna Rectifier Simulation: Control inside the PWM Generator

Thank you for providing the Vienna Simulation. The control for this rectifier is easy to understand except the PWM control used inside the PWM generator. It would be a great help, if anyone can suggest me the logic adopted inside the PWM generator block.

The link for the Vienna simulation : https://in.mathworks.com/help/sps/ug/vienna_rectifier.html?s_tid=srchtitle_vienna%20_1

Kindly elucidate the control inside the encircled block that is shown in the attached image.

Thank you!

[shiv singh]

Kindly provide me matlab simulink model for "design of sliding mode controller for single phase quasi impedance source inverter".

Answer 1

[Sabin]

The Vienna Rectifier (PWM Generator) is used to generate the gate signals for Vienna Rectifier and is based on the theory from R. Burgos, R. Lai, Y. Pei, F.Wang, D. Boroyevich, and J. Pou, “Space vector modulation for Vienna-type rectifiers based on the equivalence between two- and three-level converters: A carrier-based implementation”, IEEE Trans. Power Electron., vol. 23, no. 4, pp. 1888–1898, Jul. 2008

It is implemented in a similar fashion with the PWM Generator (Three-phase, Two-level) block. Ineternally the small hexagon is choosen and the reference vector is calculated then the ON and OFF gating times are obtained. I hope this helps.

[ujas patel]

I Understood, Thankyou very much for information.

Answer 2

[Joel Van Sickel]

The help doc here has references to the material used to derive it if you want to dig deeper (see bottom of document): https://www.mathworks.com/help/sps/ref/pwmgeneratorviennarectifier.html

The algorithm is also "white box" meaning you can view the matlab code that impelments it. If you right clock the block and look under mask, you will see a subsystem called "Switching Time Calculation". This is a matlab function block that you can double click on. Inside of it, you will see this line of code:

[TgabcON,TgabcOFF,SmallHexNum] = ee.control.pwm.SwitchingTimeViennaRectifier(Vabc,Iabc,vdc,vneutral,fsw);

if you highlight the following "ee.control.pwm.SwitchingTimeViennaRectifier" you can right click the text and select the option open("ee.control.pwm.SwitchingTimeViennaRectifier")

however, now that I've explained it, you can skip that step and just paste this into your command window ->

open("ee.control.pwm.SwitchingTimeViennaRectifier")

and it will open up the algorithm for you. That will get you started.

[ujas patel]

This information will be great help me to undertand control algorithm...

I am grateful for your support.

Thank you for the Information.