TY - GEN
T1 - Enhanced Pulse Width Modulation Methods for 1-ϕ Five-Level Neutral Point Clamped Inverter
AU - Chamarthi, Phani Kumar
AU - El Moursi, Mohamed Shawky
AU - Al Durra, Ahmed
AU - Al Hosani, Khalifa Hassan
AU - Al Sumaiti, Ameena
N1 - Funding Information:
This work is funded by the Advanced Power and Energy Centre (APEC) at Khalifa University. The authors want to thank APEC for supporting this valuable work.
Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - This paper proposes enhanced pulse width modulation (PWM) techniques for the single-phase five level neutral point clamped inverter. In comparison with the traditional modulation techniques such as level shifted PWM (LS-PWM) and phase shifted PWM (PS-PWM), the proposed PWM techniques can guarantee enhanced power quality and the power balance between the two-legs of the inverter. With traditional modulation techniques, the losses between both legs of the inverter are not equal due to unequal utilization rate of the switches which reduces the efficiency of the inverter. Further, the unequal power loss distribution will result in unequal junction temperatures of the semiconductor devices which causes the failure of the power devices. Hence the reliability of inverter reduces. To tackle these issues, two enhanced PWM techniques that rely on modified/improved modulating waves and re-arranged triangular waves are introduced in this paper. By using the proposed PWM techniques, the power can be uniformly allocated between the two legs of the inverter. In addition, the switch's utilization rate is the identical with less switching times resulted in reducing the junction temperatures and enhancing the efficiency of the inverter. The proposed modulation techniques are verified through MATLAB simulations and experimentally validated on a 1kVA laboratory prototype of five level inverter.
AB - This paper proposes enhanced pulse width modulation (PWM) techniques for the single-phase five level neutral point clamped inverter. In comparison with the traditional modulation techniques such as level shifted PWM (LS-PWM) and phase shifted PWM (PS-PWM), the proposed PWM techniques can guarantee enhanced power quality and the power balance between the two-legs of the inverter. With traditional modulation techniques, the losses between both legs of the inverter are not equal due to unequal utilization rate of the switches which reduces the efficiency of the inverter. Further, the unequal power loss distribution will result in unequal junction temperatures of the semiconductor devices which causes the failure of the power devices. Hence the reliability of inverter reduces. To tackle these issues, two enhanced PWM techniques that rely on modified/improved modulating waves and re-arranged triangular waves are introduced in this paper. By using the proposed PWM techniques, the power can be uniformly allocated between the two legs of the inverter. In addition, the switch's utilization rate is the identical with less switching times resulted in reducing the junction temperatures and enhancing the efficiency of the inverter. The proposed modulation techniques are verified through MATLAB simulations and experimentally validated on a 1kVA laboratory prototype of five level inverter.
KW - 1-ϕ inverter
KW - Five-level inverter
KW - junction temperature
KW - power losses
KW - pulse width modulation technique
UR - https://www.scopus.com/pages/publications/85144010207
U2 - 10.1109/ECCE50734.2022.9947633
DO - 10.1109/ECCE50734.2022.9947633
M3 - Conference contribution
AN - SCOPUS:85144010207
T3 - 2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
BT - 2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
Y2 - 9 October 2022 through 13 October 2022
ER -