Entry 3 : FYP2 Reflection of Progress 3

by AIMAN RUSYAIDI BIN ABD RAHMAN

This entry will described the results obtained from Matlab Simulink for both symmetrical and asymmetrical cascaded multilevel inverter using multiple carrier SPWM technique.

Gantt chart for FYP2

gantt chart fyp2.PNG

Circuit configuration


.                                                                                        circuit configuration.PNG

Symmetrical cascaded multilevel inverter

symmetric circuit.PNG

R = 70 ohm   ,   L = 55 mH

pwm symmetric.PNG

Multiple carrier SPWM output

Ma = 1     ,       Mf = 5 kHz

 

Vinput symmetrical.PNG

Voltage input waveform

 

ouput symmetrical.PNG

Output waveforms of symmetrical cascaded multilevel inverter

Number of voltage levels = 11

 

thd voltage symmetrical.PNG

THD for voltage is 16.26%

 

thd current symmetrical.PNG

THD for current is 5.12%

Asymmetrical cascaded multilevel inverter

asymmetric circuit.PNG

R = 70 ohm    ,      L = 55 mH

 

pwm asymmetric.PNG

Multiple carrier SPWM output 

Ma = 1    ,      Mf = 5 kHz

 

Vinput asymmetrical.PNG

Voltage input waveform

 

output asymmetrical.PNG

Output waveform of asymmetrical cascaded multilevel inverter

Number of voltage levels = 21

 

thd voltage asymmetrical.PNG

THD for voltage is 8.39%

 

thd current asymmetrical.PNG

THD for current is 6.41%

Analysis

  Symmetrical cascaded multilevel inverter Asymmetrical cascaded multilevel inverter
Voltage output 100 V 180 V
No. of voltage levels 11 21
Output voltage THD value 16.26% 8.39%
Output current THD value 5.12% 6.41%
Number of IGBT 14 14
Updated on 02 January 2021, 9:33 PM; 321 page visits from 1 June 2020 to 5 February 2026