TY - JOUR
T1 - Circuit Configuration and Modulation of a seven-level Switched-Capacitor Multilevel Inverter
AU - Khodaparast, Aryorad
AU - Hassani, Mohammadjavad
AU - Azimi, Erfan
AU - Adabi, M. Ebrahim
AU - Adabi, Jafar
AU - Pouresmaeil, Edris
PY - 2020/11/6
Y1 - 2020/11/6
N2 - In this paper, a step-up seven-level inverter supplied by a single DC source suitable for renewable energy application is presented. Forming the desired output is realized by charging capacitors and synthesizing them based on switched-capacitor concept. This structure is praised for the ability of sensor-less voltage balancing of the capacitors, reducing control complexity to produce a bipolar staircase waveform. It also benefits from regenerative performance, avoiding unwanted capacitors overvoltage. Phase Disposition Pulse Width Modulation technique is utilized to control the circuit operation. Furthermore, a comparison with other recent topologies reveals that losses, number of semiconductor devices, and gate driver circuits are reduced. Theoretical analysis is verified through a laboratory prototype implementation. Experimental results under various types of loads approve the performance of the proposed inverter and validity of the design. Finally, maximum experimental efficiency of 94.3% (115 V, 250 W load) was reached.
AB - In this paper, a step-up seven-level inverter supplied by a single DC source suitable for renewable energy application is presented. Forming the desired output is realized by charging capacitors and synthesizing them based on switched-capacitor concept. This structure is praised for the ability of sensor-less voltage balancing of the capacitors, reducing control complexity to produce a bipolar staircase waveform. It also benefits from regenerative performance, avoiding unwanted capacitors overvoltage. Phase Disposition Pulse Width Modulation technique is utilized to control the circuit operation. Furthermore, a comparison with other recent topologies reveals that losses, number of semiconductor devices, and gate driver circuits are reduced. Theoretical analysis is verified through a laboratory prototype implementation. Experimental results under various types of loads approve the performance of the proposed inverter and validity of the design. Finally, maximum experimental efficiency of 94.3% (115 V, 250 W load) was reached.
KW - Multilevel inverter
KW - Single-source
KW - Switched-capasitor
KW - Step-up converter
KW - Self-balancing
UR - http://www.scopus.com/inward/record.url?scp=85096861139&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2020.3036351
DO - 10.1109/TPEL.2020.3036351
M3 - Article
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
SN - 0885-8993
ER -