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Forum: Analog Circuits Z-Source-Inverter


Author: Sven (Guest)
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Hello all together,

I have a question about the Z-Source-Inverter.
Can somebody give me some good links, where the Z-Source-Inverter is 
described very good?
I have a project, in which I have to integrate the Z-Source-Inverter. 
But I didn't understand the function of this circuit.

Thanks a lot!

Author: Bascomfehler (Guest)
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Author: Exe (Guest)
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Hi Sven.
Here we go. It absolutely makes sense to use a
z-source-power-inverter instead of conventional pwm-systems based on 
regularly variation in the pulse-width of a switched dc-power-supply as 
for example a car battery.
OK, the gain in efficiency is not that tremendous but even 0.01 is a lot 
at a power level of, lets say, 75KW.
The principle of function is briefly explained in this link originated 
by Bascom. To follow up and to understand the principle of mathematics 
used in this link might not be the easiest thing on earth but it is 
highly satisfying.

Author: Bene (Guest)
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I don't know, wether this topic is dead or not.

I also want to know, how a Z-Source-Inverter works, but the formulas 
mentioned in the link by Bascomfehler are really hard.
Is there also an other link, in which it is easier explained?
However, thanks to Bascomfehler and Exe for the link although Sven 
opened the topic and you wrote the link to him.

Author: Exe (Guest)
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Hi Bene
The link is indeed not the easiest thing to understand but I will try to 
explain the formal sequences as far as possible.
Do not think that here are no freaks and well-informed guys but 
sometimes they are just lazy to merge and discuss.
So give me short while.
This is a tremendous interesting theme.

Author: Exe (Guest)
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Hi Bene,
here we go.
I did not follow up those equations in the link as sometimes it is so 
special that it exceeds my resources. This is something for spec 
ialists.
Roughly the bare facts.
The losses in a standard PWM are equated by the sum of
Pv = sum of ((Rdon x (Imax)²))
where Rdon is the minimal on-resistance of the switching FET and we have 
to add all FETS for the total losses as far as they are in the
1-state.
The sense of boosting PWM is to provide a higher voltage at the motor 
than the 250V of a standard car battery.
It tells about 420V.
If the maximal average voltage is higher the motor needs a lower current 
and so the losses are tending down.
The Z-mechanism is to use 2-4 inductors instead of just 1-2 inductor and 
to get more voltage than those named 420V. It is not shown how much 
more.
This slows down the Imax and therefore the losses.
At higher power-ratings as i.e. 75KW they promise a lot of gain in 
efficiency up to 20%.
Whether this is true or not: God only knows.

Author: Bene (Guest)
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Okay,

really a big thank you to you! Sometimes it's a little bit hard to 
understand such a complicated circle in English (I'm German).
So thanks a lot, that you tried to explain it to me very simple!

Author: julio (Guest)
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i got simulations on matlab simulink, do you want it ?.

Author: Axel Düsendieb (axel_jeromin)
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Hi julio,
I am also intrested in the simulation.
Please post it here in the forum.

Thanks
Axel

Author: Tonky Just tonky (tonky)
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Hi Julio,

Kindly send the simulations to me. So far I know that Z-source inverter 
could be controlled using some strategies, i.e simple control, maximum 
boost control, constant maximum boost control, as well as modified PWM 
control. Do you have simulations using those strategies? If you could 
send me all you have, I will appreciate it very much. Thanks a lot.

Author: Mfn Tajuddin (Guest)
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Can I have the simulation for z-source inverter. TQ

Author: Mfn Tajuddin (Guest)
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julio wrote:
> i got simulations on matlab simulink, do you want it ?.

Can I have that simulation? TQ

Author: Dave J (Guest)
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Hi, I also request the simulation and any info on component types, 
values and measured values on built system

Author: Mfn Tajuddin (Guest)
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Axel Düsendieb wrote:
> Hi julio,
> I am also intrested in the simulation.
> Please post it here in the forum.
>
> Thanks
> Axel

Hi Axel

Have you got the simulation for z source inverter from julio? If yes can 
you send it to me . TQVM!

Author: Mfn Tajuddin (Guest)
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Tonky Just tonky wrote:
> Hi Julio,
>
> Kindly send the simulations to me. So far I know that Z-source inverter
> could be controlled using some strategies, i.e simple control, maximum
> boost control, constant maximum boost control, as well as modified PWM
> control. Do you have simulations using those strategies? If you could
> send me all you have, I will appreciate it very much. Thanks a lot.

Hi Tonky

Do you have any good link or resources on z-source inverter. If possible 
can I have them. TQ

Author: Axel Düsendieb (Guest)
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Hi Faridun,
sorry, I havend reveived the simulation for z source inverter.


Axel

Author: Mfn Tajuddin (Guest)
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Axel Düsendieb wrote:
> Hi Faridun,
> sorry, I havend reveived the simulation for z source inverter.
>
>
> Axel

Hi Axel,

Do you works on z source inverter? If yes, can I have any materials that 
good for me to understand faster on this inverter. TQ

Author: Thangaprakash_India (Guest)
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Hi all,

I have attached the matlab/simulink files of carrier based control 
strategies simple boost control, maximum boost control and constant 
boost control. All in open loop.
If it would help to somebody to carry over their research/project, I 
would be very happy.
Post me if you have more doubts on this.

Author: Thangaprakash_India (Guest)
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Hi refer above posting

Author: Mfn Tajuddin (Guest)
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Thank you very much Thangaprakash_India. Hope I can ask you further if 
I'm facing any problem.

Author: Anand Akkara (Company: BITS-PILANI) (aak)
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hi all,

any body having simulinlk(MATLAB) of closed loop control of z-source 
inverter

ple.. post.very imp

AAK

Author: Jayasree Venkat (jayasree)
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hi,

Iam in need to design controller for z-source inverter in simulink, 
matlab.

suggest me how to do?. or if anybody has already worked on it. kindly 
send those simulations

Author: Mfn Tajuddin (Guest)
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Jayasree Venkat wrote:
> hi,
>
> Iam in need to design controller for z-source inverter in simulink,
> matlab.
>
> suggest me how to do?. or if anybody has already worked on it. kindly
> send those simulations



Hi all,

I'm also need simulation for closed loop control of z-source inverter or 
any other material regarding this matter. Anybody here can help. TQ

Author: Mfn Tajuddin (Guest)
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Jayasree Venkat wrote:
> hi,
>
> Iam in need to design controller for z-source inverter in simulink,
> matlab.
>
> suggest me how to do?. or if anybody has already worked on it. kindly
> send those simulations


Hi Jayasree Venkat,

Have you found any material on closed loop system for z-source inverter? 
If yes can you send to me. TQ

Author: nitewind (Guest)
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I am also interested in Z-source inverter.Can anyone share something 
about simulation in matlab simulink or its layout?
Thanks for your help. :D

Author: SANDIPAN P. (sandipan_p)
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@ Thangaprakash_India

CAN U PLEASE TELL ME HOW OUTPUT VOLTAGE VARIES IN THIS SIMULATION WHICH 
U HAVE ATTACHED ... & WHICH TYPE OF CONTROL TECHNIQUE U HAVE USED 4 GATE 
PULSE ..

Author: Sadam H. (sadam_h)
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How to apply maximum boost control using simulink
I have applied third harmonics and triangular wave as input  to a 
relational operator and pulse are generated and no i have provide a 
shootthrough input for this output pulse but the output pulse is not 
clear and distortion occurs plz if u have simulation for maximum boost 
control of z- source plz mail to diz id sadam06husen@gmail.com

Author: Pradeep sp (Guest)
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Hi,here i had a doubt in design feature of Z source network...How to 
choose the values of inductor and capacitor in the network..I can't 
understand from the basic ideas...So,i need a detailed information about 
Z source network..

Author: Disturbed L. (disturbed_l)
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Thangaprakash_India wrote:
> Hi all,
>
> I have attached the matlab/simulink files of carrier based control
> strategies simple boost control, maximum boost control and constant
> boost control. All in open loop.
> If it would help to somebody to carry over their research/project, I
> would be very happy.
> Post me if you have more doubts on this.

Hi sir,

I am trying to run the simulations you have posted and getting these
errors

''Warning: Input port 2 of 'ZSI_SBC_Open_Loop_Perfect/Scope4' is not
connected.

Warning: The specified buffer for 'ZSI_SBC_Open_Loop_Perfect/RMS1/T' was
too small.

During simulation, the buffer size was temporarily increased to 17408.
In order to generate code, you need to update the buffer size parameter

Warning: The specified buffer for 'ZSI_SBC_Open_Loop_Perfect/RMS2/T' was
too small.
During simulation, the buffer size was temporarily increased to 17408.
In order to generate code, you need to update the buffer size parameter

Warning: The specified buffer for 'ZSI_SBC_Open_Loop_Perfect/Mean
Value/Transport Delay' was too small. During simulation, the buffer size
was temporarily increased to 17408. In order to generate code, you need
to update the buffer size parameter ''

Please help sir..i am using them for my thesis ..I really need ur help

Author: Masoud Ghodsi (masoud)
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Thangaprakash_India wrote:
> Thangaprakash


Hi!
my name is masoud. I read your papers about zsi . my thesis is about 
this field. I appreciate that  you would help me. would you send me 
simulation  about controler design for quasi-z -source?
thanks!

Author: pratibha (Guest)
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Hello sir,
I was trying to generate input pulses for the generator by comparing 
triangular wave with constant dc. I changed the configuration parameters 
to get triangulation wave at 500 hz and then I used relational operator 
to generate pulses. The problem arising is that the relational operator 
are not working properly in the changed parameters please help
The change in configuration parameters was fixed step and solver I did 
was discrete

Author: kiwi (Guest)
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Thangaprakash_India wrote:
> Hi all,
>
> I have attached the matlab/simulink files of carrier based control
> strategies simple boost control, maximum boost control and constant
> boost control. All in open loop.
> If it would help to somebody to carry over their research/project, I
> would be very happy.
> Post me if you have more doubts on this.

Hi

I gonna connect to you on email, I could not find that...

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