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Amit Tiwari (view profile)



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this SIMULINK MODEL presents A "Z SOURCE INVERTER" performance analysis and simulation of maximum constant boost-control with third harmonic injection methods for the Z-source inverter, which can obtain maximum voltage boost for a fixed modulation index. The Z-source inverter is a recently invented a new power conversion concept mainly developed for fuel cell vehicular applications. The Z-source inverter is very advantageous over traditional inverters and it can be employed in all ac and dc power conversion applications. All traditional PWM methods can be used to control Z-source inverter. Maximum constant boost control methods eliminates the low-frequency ripples in the inductor current and capacitor voltage by maintaining the shoot-through duty cycle constant, and minimize the voltage stresses of switching devices at the same time. The Maximum boost control method is suitable for relatively high output frequency only, but in the maximum constant boost control method the Z-source network design is independent of the output frequency and determined only by the switching frequency. In thisSIMULATION Z-source inverter parameters such as boost factor, output dc link voltage, capacitor voltage, output ac voltage, voltage gain etc. are determined for maximum constant boost control method for a fixed modulation index and these results are verified by SIMULATION results.

Required Products Simulink
MATLAB release MATLAB 7.8 (R2009a)
Other requirements WINDOWS XP OR ABOVE, 512 MB RAM (MIN)
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Comments and Ratings (8)
05 Nov 2014 Tejaswi Sai

Hello! Where have you uploaded the newer version which includes the shoot through states? And also please state the boost control method that you use. Thank you!

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10 Sep 2014 mayuresh

how to find the values of inductor and capacitor for this z source inverter

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11 Aug 2014 Amalnath Krishnan Sivadasan

where is the feedback circuit?

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11 Aug 2014 Amalnath Krishnan Sivadasan

even the paper presented in IEEE can be said a partially successful one. It shows a large overshoot in voltage(ie speed of motor) in < 1 second. The motor can't withstand this speed.

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31 May 2014 Amalnath Krishnan Sivadasan

you have not included shoot through state pulses.This model is not an Z-source inverter, because of the absence of shoot through pulses. The impedenze network is correct.Without shoot through stste, it works as a SPWM inverter.
Shoot through pulses can't be generated along with the SPWM signals. It has to be generated seperately and added to the SPWM whenever it is necessary to boost the output voltage.The need for shoot through pulse is only when speed of motor falls below set speed. So a feedback system is needed to sense the speed and it has to be coupled with the shoot through pulse generator.
In this model there is no feed back circuit and speed comparator. In fact a PID controller is enough to do it. It will be better if we use microprocessor. There is no information about the THD also.
Needs a lot of more additions. I am trying to do it.

12 Apr 2014 omer

omer (view profile)

i thank you very much

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13 Apr 2013 Amit Tiwari

Amit Tiwari (view profile)

with refrence to this suggestion a newer version of same model has been uploaded,however this model will proove to be helpful to students in learning the basic concept of z source inverter.

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21 Mar 2013 poonam bhor

i saw dis simulation..but i found it quite irrelavant. u have not done anything related to shoot through state and that is what the idea behind z source inverter. do something to ralated that..which can be useful about z source inverter.

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