TY  - JOUR
T1  - Design and Simulation of a New Seven Levels Inverter for
Renewable Energy Sources
AU - Fawzi Mohammed, Mustafa AU - Husain Ahmad, Ali AU - Thiab Humod, Abdulrahim 
JO  - Journal of Engineering and Applied Sciences
VL  - 13
IS  - 16
SP  - 6866
EP  - 6872
PY  - 2018
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2018.6866.6872
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2018.6866.6872
KW  - Inverter
KW  -multi-levels
KW  -seven levels
KW  -POD
KW  -APOD
KW  -THD
AB  - In multi-level inverters design, the number of DC sources and switching devices are the key factors
for designing of this kind of inverters. This study presents a new design of a seven levels inverter by using of
single DC source with three series connected capacitors that are in parallel with the DC source. Only 8 IGBT
switching devices are required for the design. A new method of modulation is presented to get the logic
expression that makes the required pulses to drive the IGBT switches of the proposed inverter with a prior
assumption that the frequency of each carrier is the same as the frequency of the reference or modulating signal
to get the logic expression for each switching device. Later, the frequency of the carriers can be increased to
a desired level for a proper performance of the inverter. In the proposed research, the fundamental frequency is
50 Hz and the carriers frequency is 3 kHz. The proposed inverter is simulated successfully by using MATLAB
Simulink where low total harmonic distortion was achieved for its output voltage and current.
ER  -