IGBT BASED 180 DEGREE CONDUCTION MODE VSI

版本 1.0.0 (32.8 KB) 作者: Dr. Madhusudhan M
Detailed design of IGBT-based VSI inverter with 180-degree conduction mode technique.
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Switching logic for 180 degree conduction Mode for VSI
In this circuit we have 6 mosfets and we group it into positive and negative group
Positive Group are S1 S3 S5
Negative Group are S4 S6 S2
Three Legs
Leg1 Leg2 Leg3
S1 S3 S5
S4 S6 S2
Note: Two switch of same leg shoud not conduct thats why we use NOT gate
Switching logic for 180 degree conduction Mode for VSI
180 degree means out of full cycle(360 degree T=50 Sec) each switch will conduct for 180 degree,
which is nothing but it will conducts for every half period(180 degreeT/2= 25 sec).
Therefore duty cycle is 50 percentage which i substitute in the pulse generator.
T=1/50= 20msec
m=milli=0.001=10^(-3)=E-03
Delay Calculation for pulse generator
Pulse generator 1 starts from zero
Xdelay1=0 sec
Pulse generator 2 starts from
360 degree= 20msec
60 degree=x=xdelay2
xdelay2=(60*20*0.001)/(360)=3.3333*10^(-3)=3.3333*E-03= Which i substitute in pulse generator two
Xdelay2=3.3333*E-03sec
360 degree= 20msec
120 degree=x=xdelay3
xdelay3=(120*20*0.001)/(360)=6.666*10^(-3)=6.666E-03= Which i substitute in pulse generator three
xdelay3=6.666E-03
Opertion mode
At every instant three switch will conduct for 60 degree= 360/6 switch= 60 degree
mode1: S1 S6 S5 mode conducts for 60 degree 0 degree<wt<60 degree
0sec<t< 3.333msec
mode2:S1 S6 S2 mode conducts for 60 degree from 60 degree<wt<120 degree
3.333msec<t< 6.666msec
mode3:S1 S3 S2 mode conducts for 60 degree from 120 degree<wt<180 degree
6.666msec<t< 10msec
mode4:S4 S3 S2 mode conducts for 60 degree from 180 degree<wt<240 degree
10msec<t< 13.333msec
mode4:S4 S3 S5 mode conducts for 60 degree from 240 degree<wt<300 degree
13.333msec<t< 16.666msec
mode6:S4 S6 S5 mode conducts for 60 degree from 300 degree<wt<360 degree
16.666msec<t< 20msec
From Mode 1 to Mode 3 common switch is S1 will conduct for 60 degree+60 degree+60 degree= 180 degree ,hence the name 180 degree conduction mode.

引用格式

Dr. Madhusudhan M (2024). IGBT BASED 180 DEGREE CONDUCTION MODE VSI (https://www.mathworks.com/matlabcentral/fileexchange/110500-igbt-based-180-degree-conduction-mode-vsi), MATLAB Central File Exchange. 检索来源 .

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