Results 171 to 180 of about 2,128 (219)

Single phase ZVS PWM NPC inverter

XI Brazilian Power Electronics Conference, 2011
This paper presents a zero-voltage, pulse width modulated, NPC inverter, with active voltage clamping using only two auxiliary switches. The structure is particularly simple and robust. It is very attractive for high-power applications, single or multiple phases, due to neutral point accessible at the NPC topology.
Eduardo Maldaun Barreto, Marcello Mezaroba, Denis Silva Oliveira   +2 more
openaire   +1 more source

A single-phase asymmetrical NPC inverter topology

2016 13th International Conference on Power Electronics (CIEP), 2016
This paper presents a topology and a modulation scheme for a single-phase multi-level inverter referred as asymmetrical NPC. The proposed topology is formed by two legs, namely, a NPC and a standard two-level leg, where The NPC leg allows access to the middle point of the DC source.
M. J. Lopez-Sanchez, E. I. Pool, R. Cruz-Chan, G. Escobar, Juan F. Martinez-Garcia, A. A. Valdez-Fernandez, C. Villanueva   +6 more
openaire   +1 more source

Algebraic PWM Strategy of a Multilevel NPC Voltage Source Inverter

2007 14th IEEE International Conference on Electronics, Circuits and Systems, 2007
In this paper, the author's present one algorithm of algebraic PWM strategy for nine - level Neutral Point Clamping (NPC) Voltage Source Inverter (VSI) is presented. This algorithm uses a control model of the inverter developed previously by the authors. In the first part, we develop a working model of this inverter, without presumption on its control,
Dalila Boufassa, Farid Bouchafaa, El Madjid Berkouk, Mohamed Seghir Boucherit   +3 more
openaire   +1 more source

Detection of IGBT degradation in NPC inverter based on infrared thermography

Journal of Computational Methods in Sciences and Engineering, 2018
Multilevel inverters have been widely applied in high-voltage and high-power applications. Due to the increasing number of the switching devices in multilevel inverter, the probability of fault is increasing simultaneously. The development of reliable systems for fault detection that enable to diagnose a wide range of faults is a motivation of many ...
Danjiang Chen, Yutian Liu, Wei Zhang, Minhua Zheng, Shaozhong Zhang   +4 more
openaire   +1 more source

A general space-vector modulation technique for multilevel NPC inverter

2016 IEEE International Conference on Industrial Technology (ICIT), 2016
This paper presents a general and yet fast multilevel space-vector modulation technique, based on orientation of reference point in terms of hexagon lines. The main advantage of the proposed algorithm is the reduced volume of calculations that consequently makes it possible for implementing on cheaper microprocessors.
Pouria Qashqai, Hani Vahedi, Abdolreza Sheikholeslami, Kamal Al-Haddad   +3 more
openaire   +1 more source

Zero-voltage switching for the neutral-point-clamped (NPC) inverter

IEEE Transactions on Industrial Electronics, 2002
This paper proposes a transformer-assisted pulsewidth-modulation zero-voltage-switching neutral-point-clamped (NPC) inverter. With the assistance of a transformer-assisted small-rating lossless auxiliary circuit, the main switches work with zero-voltage switching without suffering from any voltage/current spikes, under simple explicit control.
Xiaoming Yuan, Ivo Barbi
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

Control Methods for Tripled Structure NPC Inverter

2013
Voltage waveform of single inverter contains more harmonics. In order to reduce the harmonic content, the H-bridge inverter with multiple structures was used to obtain a low harmonic voltage. However, this paper explored the multiple method based on the neutral point clamped inverter for obtaining the multiple circuit with lower harmonic content than ...
Cheng Zeng, Hong Zheng
openaire   +1 more source

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
openaire   +1 more source