US 11,750,108 B2
Method for controlling output voltage at a multilevel inverter
Hussain Bassi, Jeddah (SA); and Muhyaddin Rawa, Jeddah (SA)
Assigned to King Abdulaziz University, Jeddah (SA)
Filed by King Abdulaziz University, Jeddah (SA)
Filed on Dec. 14, 2020, as Appl. No. 17/121,144.
Application 17/121,144 is a division of application No. 17/010,897, filed on Sep. 3, 2020, granted, now 10,917,021.
Prior Publication US 2022/0069732 A1, Mar. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H02M 7/5387 (2007.01); H02J 1/00 (2006.01); H02M 7/483 (2007.01); H02M 1/12 (2006.01); H02J 1/08 (2006.01); H02M 1/088 (2006.01); H02M 7/537 (2006.01)
CPC H02M 7/483 (2013.01) [H02M 1/088 (2013.01); H02M 7/537 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for controlling an output voltage at a multilevel inverter output terminal of a 15-level multilevel inverter, the 15-level multilevel inverter including five voltage supplies and thirteen unidirectional power switches, wherein each unidirectional power switch is turned ON by providing a control signal to a gate of the unidirectional power switch, comprising:
providing control signals to the gates of each of a first switch, a second switch, and a grounding switch to turn ON the first switch, the second switch, and, the grounding switch, and generate a voltage level of zero at the multilevel inverter output terminal; or
providing control signals to the gates of each of the second switch and a third switch to turn ON the second switch and the third switch, and generate a voltage level of 2Vdc at the multilevel inverter output terminal, where Vdc is selected from the range of 1-30 volts; or
providing control signals to the gates of each of the first switch, the grounding switch, a fourth switch, and a fifth switch to turn ON the first switch, the grounding switch, the fourth switch, and the fifth switch, and generate a voltage level of 3Vdc at the multilevel inverter output terminal, where Vdc is selected from the range of 1-30 volts; or
providing control signals to the gates of each of the second switch, the fourth switch, and the fifth switch to turn ON the second switch, the fourth switch, and the fifth switch, and generate a voltage level of 4Vdc at the multilevel inverter output terminal; or
providing control signals to the gates of each of the first switch, the grounding switch, the fourth switch, a sixth switch, and a seventh switch to turn ON the first switch, the grounding switch, the fourth switch, the sixth switch, and the seventh switch, and generate a voltage level of 5Vdc at the multilevel inverter output terminal; or
providing control signals to the gates of each of the second switch, the fourth switch, the sixth switch, and the seventh switch to turn ON the second switch, the fourth switch, the sixth switch and, the seventh switch, and generate a voltage level of 6Vdc at the multilevel inverter output terminal; or
providing control signals to the gates of each of the first switch, the grounding switch, the fourth switch, the sixth switch, and an eighth switch to turn ON the first switch, the grounding switch, the fourth switch, the sixth switch, and the eighth switch, and generate a voltage level of 7Vdc at the multilevel inverter output terminal; or
providing control signals to the gates of each of the second switch, the fourth switch, the sixth switch, and the eighth switch to turn ON the second switch, the fourth switch, and the seventh switch, and generate a voltage level of 8Vdc at the multilevel inverter output terminal; and
providing control signals to the gates of each of a ninth and a twelfth switch to switch polarity to positive voltage at the multilevel output inverter terminal; or
providing control signals to the gates of each of a tenth and an eleventh switch to switch the polarity to negative voltage at the multilevel inverter output terminal.