Results 111 to 120 of about 7,564 (188)

A neutral point clamped multilevel topology flow graph and space NPC multilevel topology

2015 IEEE Energy Conversion Congress and Exposition (ECCE), 2015
Neutral-Point Clamped (NPC), such as diode-clamped, multilevel inverter technology has emerged recently as a very important alternative in the area of high-power medium-voltage energy control. However, the NPC Multilevel topology also has variable type of structure which cannot be found due to lack of systematic derivation methodology.
Hongliang Wang, Yan-Fei Liu, Paresh C. Sen   +2 more
openaire   +1 more source

Phase current reconstruction of three-level Neutral-Point-Clamped(NPC) inverter with a neutral shunt resistor

2017 IEEE Applied Power Electronics Conference and Exposition (APEC), 2017
This paper presents the reconstruction method of three phase current for AC motor by inserting a shunt resistor at the neutral point of a 3-level Neutral Point Clamped(NPC) inverter. To precisely acquire the phase currents from the shunt resistor, the switching time of the effective voltage vectors needs to secure the minimum time. For this reason, the
Jae-Jun You, Jun-Hyung Jung, Chang-Hwan Park, Jang-Mok Kim   +3 more
openaire   +1 more source

A neutral-point potential balancing method for Z-source neutral-point-clamped (NPC) inverters by adding the shoot-through offset

2014 International Power Electronics and Application Conference and Exposition, 2014
Compared with the conventional buck-boost three-level inverters, the Z-source neutral-point-clamped (NPC) inverters have more simple structure with improved output waveform quality. But the neutral-point potential unbalance problem is still a drawback for their applications. Based on the research of SPWM modulation method and the analysis of the effect
Xiuyan Shi, Alian Chen, Chenghui Zhang
openaire   +1 more source

Voltage Balancing of Series Connected Clamping Diodes in Medium Voltage NPC Converter enabled by Gen-3 10 kV SiC MOSFETs for Asynchronous Micro-Grid Power Conditioning System (AMPCS)

European Conference on Cognitive Ergonomics, 2019
Asynchronous micro-grid power conditioning system (AMPCS) had been proposed for integrating two medium voltage nonsynchronous grids. Neutral point clamped (NPC) converter based active front-end converters (AFECs) and three-phase dual active bridge (DAB ...
Venkat N. Jakka, Ashish Kumar, Sanket Parashar, S. Rastogi, Nithin Kolli, Ronak Jaiswal, S. Bhattacharya   +6 more
semanticscholar   +1 more source

A transformer assisted zero voltage switching scheme for the neutral-point-clamped (NPC) inverter

APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285), 1999
This paper proposes a transformer assisted PWM 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.
null Xiaoming Yuan, I. Barbi
openaire   +1 more source

An FPGA-based Dead-time Computation Technique for Neutral Point Clamped Multilevel Inverter (NPC-MLI)

2020 IEEE 17th India Council International Conference (INDICON), 2020
In order to prevent the occurrence of the short circuit between the identical phase-leg semiconductor switches, dead-time is injected in the pulse width modulation (PWM) voltage source multilevel inverters (MLIs). This paper proposes a mathematically formulated dead-time computation technique for neutral-point clamped multilevel inverters (NPC-MLIs ...
Rishiraj Sarker, Asim Datta
openaire   +1 more source

Active Thermal Control and Power Loss Reduction Scheme for Three-Level Active Neutral-Point-Clamped Inverters With Hybrid Modulation

IEEE Journal of Emerging and Selected Topics in Power Electronics
High power density and long service life are always the development requirements of power converters. This purpose has affected the selection of the power converter stage.
Wensheng Song, Wenjun He, Zhiwei Zhang, Chenwei Ma, Jiayao Li   +4 more
semanticscholar   +1 more source

Leakage Current Minimization Using NPC DC Decoupling Method for Three-Phase Cascaded Multilevel PV Inverter

IEEE Transactions on Circuits and Systems - II - Express Briefs, 2020
This brief presents a new neutral point clamped (NPC) DC decoupling method based three-phase three-level cascaded multi-level inverter (CMLI) for the minimization of leakage current in PV systems. The proposed CMLI reduces the transitions in the terminal
V. Sonti, Sachin Jain, Bhagya Sai Kumar Reddy Pothu   +2 more
semanticscholar   +1 more source

Design Optimization of the Snubber circuit for Three- level NPC Converter pole for Hard switching Application

European Conference on Cognitive Ergonomics, 2020
This paper describes the design and selection criteria of RC snubber circuit for the Three level Neutral Point Clamped (NPC) converter pole with series connected SiC MOSFETs and clamping diodes.
Sanket Parashar, Nithin Kolli, Raj Kumar Kokkonda, S. Bhattacharya   +3 more
semanticscholar   +1 more source

The balancing properties of DC link compensation for 3-phase Neutral Point Clamped (NPC) Converter

Proceedings of The 7th International Power Electronics and Motion Control Conference, 2012
One of the major benefits of a three level NPC multilevel converter is that it requires only one DC source. However, the intermediate Neutral Point (NP) voltage of the converter must be maintained midway between the two outer dc-bus voltages, to avoid semiconductor device overvoltage stress and output modulation distortion. Various approaches have been
Z. Mohzani, B. P. McGrath, D. G. Holmes
openaire   +1 more source