Feedforward control Implemetation

Grishma Tathe

Hi Team,

I am working on the PSIM for the UPS simulation. I want to implement feedback control in converter. Could you please suggest how can we do it?

Below is the block diagram for your reference.

 

Thanks in advance.

Grishma Tathe

Grishma Tathe

Hi Team,

Is there any update on my query? 

 

BR,

Grishma

Albert_Dunford

Grishma Tathe said:

Hi Team,

Is there any update on my query? 

 

BR,

Grishma

i would recommed that you look at one of the many example circuits.

many of the DC-DC, AC-DC, DC-AC feature close loop control

 

Also, these design videos are full close loop designs. Adding in feedforward is very straight forward all of the control elements you need are in the control library.

This tutorial video covers a full PFC design in s and z domain

This tutorial video is a buck inner loop

What topology are you trying to control?

Grishma Tathe

Hello Albert,

I designed single-phase full-bridge inverter. I referred Inverter design with average current and voltage loop control | PSIM tutorial video to build this model. It's working fine at full load and no load using a feedback controller (PI).

I want to implement a feedforward control technique for the same inverter circuit.

How we can set gain C(s) for this controller?

Thanks & Regards,

Grishma Tathe

Albert_Dunford

Grishma Tathe said:

Hello Albert,

I designed single-phase full-bridge inverter. I referred Inverter design with average current and voltage loop control | PSIM tutorial video to build this model. It's working fine at full load and no load using a feedback controller (PI).

I want to implement a feedforward control technique for the same inverter circuit.

How we can set gain C(s) for this controller?

Thanks & Regards,

Grishma Tathe

Hi Grishma,

The answer is in the picture you are showing! simply add back in the reference post PI controller. There is a general s-domain transfer function block here in the library.