effect of feedback on inverter circuit

8/16/2019 Effect of Feedback on Inverter Circuit

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Simulation on MATLAB to

study the effect of feedback on Inverter circuit

(Term Paper Project

Mentor!"r# M#M# Tripathi

Submitted by

"hruv Paul

$%&'))*+$


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Introduction

",!A, inverters have become the key component of the

po-er system net-ork in last fe- years# .ith the increase in

number of ",!A, inverters in po-er system/ better operation

of inverters has been emer0ed as priority for po-er system

en0ineers# The operation of these inverters are controlled by

0ate si0nals and thus the output/ harmonic/ efficiency and

other factors can be controlled by controllin0 0ate si0nal#

A proper s-itchin0 strate0y can 0ive an efficient and better control over output of ",!A, inverters# Several factors of

A,!", inverter operation that must be taken care -hile

developin0 the s-itchin0 strate0y are as follo-s 1&2!132 #

& 4utput 5MS volta0e and current#

$ 4utput peak volta0e and current

3 Total harmonic distortion (T6"#

' S-itchin0 losses#

+ Practical implementation#

In Past decade several s-itchin0 strate0ies have been

developed to tackle the issue# S7uare pulse s-itchin0/ pulse

-idth modulation (P.M/ random P.M (5P.M/ selected

harmonic elimination (S6)/ delta modulation/ hysteresis 8

variable band/ optimal P.M etc# are the fe- -ell kno-ns-itchin0 techni7ues#


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M4")LLI9: A9"

SIM;LATI49Simulation has been performed usin0 SIM;LI9% facility

of MATLAB 5$*&&b/ on the &!ph '!pulse 6!brid0e volta0e

source ",!A, inverter# The SIM;LI9% model of the circuit

is sho-n in fi0#'# The -avelet modulation has been

implemented usin0 S!function block of SIM;LI9% 1&&2#

Pro0rammin0 of S!function is done usin0 , lan0ua0e# Theinverter is based on ' s-itch topolo0y usin0 the I:BT as the

s-itch and controlled by 0ate si0nals#

The all four I:BT s-itches operate accordin0 to the 0ate

pulses provided to them# .hen I:BT#& and I:BT#$ both are

conductin0 then they 0enerates positive cycle across the load

and similarly ne0ative cycle 0ets 0enerated by operatin0

I:BT#3 and I:BT#'#

,ircuit "ia0ram


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Specifications


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The simulation is performed for the load current of +* 6< at output

terminal# All the -aveforms presented in the paper are recorded

under steady state condition# The various loadin0 condition and

other parameter for simulation is as follo-s#

& Source volta0e (=s > $**=

$ Source impedance (?s > *#& @

3 Modulatin0 inde for P.M > *#

' Modulation fre7uency for P.M > $%6<

+ 5CL load > &+D jE#'$+ @ F Motor load

a =olt!ampere (=A > *#$+ G H'F -att

b 5esistance main -indin0 stator > $#*$ @

main -indin0 rotor > '#&$ @

auiliary -indin0 stator > H#&' @

c Inductance main -indin0 stator > H#'e!' 6

main -indin0 rotor > +#Fe!3 6

auiliary -indin0 stator > #+e!3 6

main -indin0 mutual inductance> *#&HH$6

4utput


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Jello- .ave >5efernce Si0nal

Purple .ave > 4utput Si0nal

:reen .ave > )rror Si0nal

,onclusion


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The 0raphs of output /input and error si0nal -ere

obtained#

The error is about &+#$F K

effect of feedback on inverter circuit

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