Modified PWM control method for neutral point clamped multilevel inverters

2017 ◽  
Author(s):  
Taher Ahmadzadeh ◽  
Mehran Sabahi ◽  
Ebrahim Babaei
Keyword(s):  
Control Method ◽  
Neutral Point ◽  
Pwm Control ◽  
Multilevel Inverters

scholarly journals Improved Neutral-Point Voltage-Shifting Strategy for Power Balancing in Cascaded NPC/H-Bridge Inverter

Electronics ◽  
2018 ◽  
Vol 7 (9) ◽  
pp. 167 ◽  
Author(s):  
Jin-Wook Kang ◽  
Seung-Wook Hyun ◽  
Jae-Ok Ha ◽  
Chung-Yuen Won
Keyword(s):  
Phase Equilibrium ◽  
Fault Tolerance ◽  
Output Power ◽  
Control Method ◽  
Neutral Point ◽  
Voltage Range ◽  
Multilevel Inverters ◽  
Three Phase ◽  
Power Balancing ◽  
Tolerance Control

This paper investigates the fault-tolerance control of a multilevel cascaded NPC/H-bridge (CNHB) inverter. The fault-tolerance control method has been widely used for multilevel inverters, such as the neutral-point voltage-shifting control, which can operate for a certain period of time by compensating for the phase voltage of a faulty stack even if one stack is broken. Even though the three-phase equilibrium is maintained in the case of failure by using the conventional neutral-point voltage-shifting control, an imbalance in the output power occurs between each stack, which causes problems for maintenance and lifetime. Therefore, this paper proposes a fault-tolerance control that can maintain three-phase equilibrium in a case of stack failures and minimize power imbalances between the stacks. The problem of the conventional neutral-point voltage-shifting control is presented based on the output power. In addition, the power imbalance is improved by performing selective neutral-point voltage-shifting control according to the reference voltage range. To verify the principle and feasibility of the proposed neutral-point voltage-shifting control method, a simulation and an experiment are implemented with the CNHB inverter.

scholarly journals PWM Control Method suitable for High Voltage Multilevel Inverters

2001 ◽  
Vol 121 (4) ◽  
pp. 476-483 ◽  
Author(s):  
Yoshitaka Iwaji ◽  
Toshiaki Okuyama ◽  
Daigo Kaneko ◽  
Shigetoshi Okamatsu
Keyword(s):  
High Voltage ◽  
Control Method ◽  
Pwm Control ◽  
Multilevel Inverters

A Novel PWM Control Method for Hybrid-Clamped Multilevel Inverters

2010 ◽  
Vol 57 (7) ◽  
pp. 2365-2373 ◽  
Author(s):  
Jing Zhao ◽  
Xiangning He ◽  
Rongxiang Zhao
Keyword(s):  
Control Method ◽  
Pwm Control ◽  
Multilevel Inverters

scholarly journals Consideration on PWM Control for Neutral Point Clamped Inverter.

1992 ◽  
Vol 112 (6) ◽  
pp. 553-560 ◽  
Author(s):  
Shigeru Tanaka ◽  
Kazutoshi Miura ◽  
Tetuo Watanabe ◽  
Susumu Tadakuma ◽  
Haruo Ikeda
Keyword(s):  
Neutral Point ◽  
Pwm Control

Comparison of Neutral-Point-Clamped, Symmetrical, and Hybrid Asymmetrical Multilevel Inverters

2010 ◽  
Vol 57 (7) ◽  
pp. 2297-2306 ◽  
Author(s):  
Diorge A B Zambra ◽  
Cassiano Rech ◽  
José Renes Pinheiro
Keyword(s):  
Neutral Point ◽  
Multilevel Inverters
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