Results 171 to 180 of about 7,459 (224)

Cascaded Transformers-Based Multilevel Inverters With NPC

IEEE Transactions on Industrial Electronics, 2022
The basic structure and generalization of two cascaded transformer multilevel inverters (CTMIs) are proposed in this paper. Such configurations are based on cascaded symmetrical transformers coupled to two-level (2L) legs and three-level (3L) neutral-point clamped (NPC) legs. One configuration has a shared 2L leg, connected to all transformers.
Amanda Pereira Monteiro, Filipe Antonio da Costa Bahia, Cursino Brandao Jacobina, Reuben Palmer Rezende de Sousa   +3 more
openaire   +1 more source

Optimal design of NPC and Active-NPC transformerless PV inverters

2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2012
Targeting at a cost-effective deployment of grid-connected PhotoVoltaic (PV) systems, this paper presents a new methodology for the optimal design of transformerless PV inverters, which are based on the Neutral Point Clamped (NPC) and the Active-Neutral Point Clamped (ANPC) topologies. The design optimization results demonstrate that a different set of
S. Saridakis, E. Koutroulis, F. Blaabjerg   +2 more
openaire   +2 more sources

Cascaded impedance networks for NPC inverter

2010 Conference Proceedings IPEC, 2010
Multilevel inverters are getting more and more attracted because they have better output waveform quality and lower semiconductor voltage stress. The Z-source NPC is a kind of single stage multilevel inverter which has the ability of voltage boost. But the boost capability is relatively low when they are subject to the renewable sources. To date, three
Li, Ding, Gao, Feng, Loh, Poh Chiang, Zhu, Miao, Blaabjerg, Frede; id_orcid 0000-0001-8311-7412   +4 more
openaire   +3 more sources

Thirteen level cascaded NPC inverter

2010 IEEE 26-th Convention of Electrical and Electronics Engineers in Israel, 2010
The paper presents a novel, thirteen level, and cascaded, neutral point clamped inverter. The inverter is modulated by phase disposition (PD) carrier based PWM method. The load of the inverter is a synchronous machine. The simulation results for different voltage levels, different modulation frequencies, and different carrier frequencies are presented.
Raul Rabinovici, Dmitry Baimel, Jacek Tomasik, Adrian Zuckerberger   +3 more
openaire   +1 more source

A 30kW transformer-less PV NPC inverter

2012 15th International Power Electronics and Motion Control Conference (EPE/PEMC), 2012
Conventional PV power converters are usually based on configurations that include DC-DC boost converter stage, voltage source inverter stage, passive filter stage and grid interface isolation transformer, whose presence implies less efficiency and higher costs, in particular for medium size power PV converters.
CRESCIMBINI, Fabio, LIDOZZI, ALESSANDRO, E. Rovelli, A. Salvadore, SOLERO, LUCA   +4 more
openaire   +2 more sources

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

Experimental development of a hysteresis modulated NPC inverter

Proceedings of 2003 IEEE Conference on Control Applications, 2003. CCA 2003., 2004
The paper presents the laboratory prototype realization of a system constituted by an IGBT based neutral point clamped (NPC) inverter, a driver stage and a digital control circuit board. A hysteresis control technique, developed by authors in previous papers, suitable for the current control of the NPC inverter is implemented in the control system. The
BELLINI A., BIFARETTI S., COSTANTINI, FIGALLI, Gennaro   +3 more
openaire   +2 more sources

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

SVM algorithm of three-level NPC inverter

2008 3rd IEEE Conference on Industrial Electronics and Applications, 2008
On the basis of presenting the principles of space vector modulation (svm) of three-level neutral point clamped (NPC) inverter, an approach to implementation of SVM is proposed. The dwell times of vectors are calculated according to the volt-second balancing. A triangle is adopted to compare with three switching points.
null Shanmei Cheng, null Yajun Liu, null Bing Wu   +2 more
openaire   +1 more source

Supraharmonics reduction in NPC inverter with random PWM

2017 IEEE 26th International Symposium on Industrial Electronics (ISIE), 2017
The international standardization community is currently reviewing the harmonic distortion limits in the frequency range 2 to 150 kHz, referred to as supraharmonics. Power electronics has emerged as a ubiquitous technology, which also plays a critical role in this subject.
Aurora Gil-de Castro, Antonio Moreno-Munoz, Joaquin Garrido, Sarah K. Ronnberg, Emilio J. Palacios-Garcia, Tomas Morales   +5 more
openaire   +1 more source