Results 141 to 150 of about 587 (183)

The Research and Simulation of Three-Level NPC Inverter

2016
Compared with the commonly used sine-wave pulse width modulation (SPWM) method, the space vector pulse width modulation (SVPWM) method has higher utilization rate of DC voltage and smaller output waveform distortion. This paper describes the basic principle and control algorithm of three-level SVPWM.
Yuan Deng, Guangyao Jin
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Transformerless Three Phase NPC Inverter with Reduced Switches

2018 IEEE Energy Conversion Congress and Exposition (ECCE), 2018
In a photovoltaic grid connected system, the attenuation of the common mode voltage is one of the main issues. Many single phase inverters have been proposed to improve the common mode characteristic. However, few studies have been focused on the topological improvement for common mode behavior of the three phase inverter. This paper proposed two types
Liwei Zhou, Feng Gao, Weiqi Wang, Matthias Preindl   +3 more
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Analysis and simulation of a multilevel inverter converter NPC Cascade

2007 International Conference on Computer Engineering & Systems, 2007
This paper describes the control and regulation of input DC voltages of nine-level NPC voltage source inverter. The analysis and simulation of a cascade constituted by three phase's five-level PWM rectifier-nine levels NPC voltage source inverter (VSI). In the first part, the authors present the five-level PWM rectifier. After, we present a topology of
F. Bouchafaa, E.M. Berkouk, M.S. Boucherit   +2 more
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Predictive voltage controller for T-type NPC inverter

2016 IEEE Region 10 Conference (TENCON), 2016
The objective of this paper is to present a new method to control the TNPC inverter with output LC filter based on the Predictive controller. Furthermore, the balance voltage capacitors is also obtained with the proposed method. The model of the system is used to establish the equations, which can be applied to calculate the future values of the load ...
Hai N. Tran, Tuyen D. Nguyen
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A SVPWM control strategy for NPC three-level inverter

2011 IEEE Power Engineering and Automation Conference, 2011
Based on six divided regions of space vectors, the potential position of the reference voltage vectors is firstly determined according to the principle of rotating vector normalization method. Then the effective time of three synthesized vectors is calculated by the principle of the volt-second balance principle.
null Keqing Qu, null Xi Jin, null Yuehong Xing, null Zuojin Ding, Wendong Chen   +4 more
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Optimization of SiC-Based H5 and Conergy-NPC Transformerless PV Inverters

IEEE Journal of Emerging and Selected Topics in Power Electronics, 2013
The transformerless dc/ac inverters are critical components in the rapidly growing market of grid-connected photovoltaic (PV) applications. They are synthesized by combining available solutions in terms of the power-section topology, power-semiconductors manufacturing technology, and structure of the output filter. In addition, the silicon carbide (SiC)
Saridakis, Stefanos, Koutroulis, Eftichios, Blaabjerg, Frede; id_orcid 0000-0001-8311-7412   +2 more
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Fault Diagnosis of NPC Inverter Based on Multi-layer SVM

2012
This paper presents a fault diagnosis method to diagnose varieties of faults of neutral point clamped (NPC) inverter, including the open- circuit fault occurring in one single device or more devices. Because of the difficulties in isolating some fault modes, the upper, middle and down bridge voltages are adopted the test signals.
Danjiang Chen, Yinzhong Ye, Rong Hua
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Neutral Point Clamped Inverter (NPC)

This technical note details the implementation of a closed-loop current control and grid synchronization system for a three-phase, three-wire Neutral Point Clamped (NPC) inverter. Serving as a core subsystem in a fast electric vehicle charging topology with intermediate storage, the grid-tied NPC inverter manages bidirectional power flow between the DC
François Ledent, Gabriel Fernandez
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Transformerless interleaving multilevel NPC inverter for photovoltaic systems

2015 IEEE 13th Brazilian Power Electronics Conference and 1st Southern Power Electronics Conference (COBEP/SPEC), 2015
This paper proposes a transformerless multilevel NPC (Neutral Point Clamped) inverter for grid-connected photovoltaic systems, applying the concept of high power density, using Gallium Nitride power transistors and employing interleaving strategy for reducing the weight/volume of the passive filter elements.
Gustavo Finamor, Marcel Dall Pai, Humberto Pinheiro, Luciano Schuch   +3 more
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A new approach to hysteresis modulation techniques for NPC inverters

Industrial Electronics, 2002. ISIE 2002. Proceedings of the 2002 IEEE International Symposium on, 2002
High power IGBT devices have improved their performances more and more over the last decade. However, the maximum supported voltage by available high-voltage IGBTs does not allow the employment of standard voltage source inverters in some high power applications, such as high-speed traction drives.
A. Bellini, S. Bifaretti, S. Costantini
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