switching scheme
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Author(s):  
Oscar Morales Chacon ◽  
J Jacob Wikner ◽  
Atila Alvandpour ◽  
Liter Siek

2021 ◽  
Vol 92 (10) ◽  
pp. 103702
Author(s):  
Jiahao Yan ◽  
Jiajun Ma ◽  
Aiwei Wang ◽  
Ruisong Ma ◽  
Liangmei Wu ◽  
...  

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5535
Author(s):  
Kangsoon Ahn ◽  
Yongseung Oh ◽  
Wonseok Oh ◽  
Kyumin Cho

This study presents a novel switching scheme for three-level neutral point clamped (NPC) inverters. The proposed switching method independently drives the upper- and lower-arm elements of the inverter based on the polarity information of the reference current. The proposed switching scheme does not require the inclusion of dead-time for each switching, except when the current polarity changes. Therefore, unlike the conventional inverter switching method, dead-time compensation is not needed, and the possibility of an arm-short accident is prevented. In this study, a switching procedure is detailed, and the operation mode analysis of the proposed switching scheme is presented. The effectiveness of the proposed switching method is verified experimentally by application to a grid-connected inverter that requires inverter current control.


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