Results 141 to 150 of about 5,356,859 (173)
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2013 IEEE Energy Conversion Congress and Exposition, 2013
The neutral-point balancing of 3L-NPC converter has been studied in many works in the past. However, all state-of-the-art methods have in common that the information of the energy-flow direction is needed. Recently, Direct Dead-time Control (DDTC) has been presented which controls the converter dead-times to balance the dc-link independent from the ...
Michael Sprenger +4 more
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The neutral-point balancing of 3L-NPC converter has been studied in many works in the past. However, all state-of-the-art methods have in common that the information of the energy-flow direction is needed. Recently, Direct Dead-time Control (DDTC) has been presented which controls the converter dead-times to balance the dc-link independent from the ...
Michael Sprenger +4 more
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IEEE Transactions on Industrial Electronics, 2013
A new pulse width modulation (PWM) strategy which is an alternative approach of the discontinuous PWM (DPWM) for a three-level neutral-point-clamped (NPC) inverter is developed and presented in this paper. The proposed PWM scheme not only takes advantage of the special properties available in NPC inverters, but also reduces the switching loss of the ...
Zhe Zhang 0002 +2 more
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A new pulse width modulation (PWM) strategy which is an alternative approach of the discontinuous PWM (DPWM) for a three-level neutral-point-clamped (NPC) inverter is developed and presented in this paper. The proposed PWM scheme not only takes advantage of the special properties available in NPC inverters, but also reduces the switching loss of the ...
Zhe Zhang 0002 +2 more
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IEEE Transactions on Power Electronics, 2007
Three-level neutral point clamped (NPC) voltage source converters have recently emerged as important alternatives to conventional two-level converter topologies in high-power medium-voltage energy conversion applications, particularly in high performance ac motor drive systems.
Maryam Saeedifard, Alireza Bakhshai
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Three-level neutral point clamped (NPC) voltage source converters have recently emerged as important alternatives to conventional two-level converter topologies in high-power medium-voltage energy conversion applications, particularly in high performance ac motor drive systems.
Maryam Saeedifard, Alireza Bakhshai
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2015 IEEE International Electric Machines & Drives Conference (IEMDC), 2015
The effects of the three level inverter on the core losses of a SynRM are investigated particularly at the stator yoke and tooth. A comparative study on the effects of space vector pulse width modulated (SV-PWM) two and three level inverter on the iron/core loss are analyzed. A SynRM stator made of silicon steel, M36, 0.35 mm thickness is used.
Lesedi Masisi +2 more
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The effects of the three level inverter on the core losses of a SynRM are investigated particularly at the stator yoke and tooth. A comparative study on the effects of space vector pulse width modulated (SV-PWM) two and three level inverter on the iron/core loss are analyzed. A SynRM stator made of silicon steel, M36, 0.35 mm thickness is used.
Lesedi Masisi +2 more
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Enhanced soft-switched T-type neutral-point clamped (T-NPC) inverter with reduced component number
Review of Scientific InstrumentsThis paper presents an enhanced soft-switched T-type neutral-point clamped inverter featuring a compact active snubber cell that delivers zero-voltage transition turn-on and zero-voltage switching (ZVS) turn-off for the main switches, while auxiliary switches operate with zero-current switching turn-on and ZVS turn-off.
Mehmet Cihat Ozgenel +2 more
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Energy, 2014
This paper is on offshore wind energy conversion systems installed on the deep water and equipped with back-to-back neutral point clamped full-power converter, permanent magnet synchronous generator with an AC link. The model for the drive train is a five-mass model which incorporates the dynamic of the structure and the tower in order to emulate the ...
Seixas, Mafalda +2 more
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This paper is on offshore wind energy conversion systems installed on the deep water and equipped with back-to-back neutral point clamped full-power converter, permanent magnet synchronous generator with an AC link. The model for the drive train is a five-mass model which incorporates the dynamic of the structure and the tower in order to emulate the ...
Seixas, Mafalda +2 more
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2017 Asian Conference on Energy, Power and Transportation Electrification (ACEPT), 2017
A well-known problem of three-level neutral point clamped (NPC) inverter is the voltage imbalance in the dc-link capacitors. This paper proposes the dc-link capacitor voltage balancing method where a common offset voltage is injected. The offset voltage consists of a harmonic voltage and a magnitude difference between the upper and the lower capacitors.
Kyoung-Pil Kang +4 more
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A well-known problem of three-level neutral point clamped (NPC) inverter is the voltage imbalance in the dc-link capacitors. This paper proposes the dc-link capacitor voltage balancing method where a common offset voltage is injected. The offset voltage consists of a harmonic voltage and a magnitude difference between the upper and the lower capacitors.
Kyoung-Pil Kang +4 more
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2019 IEEE Applied Power Electronics Conference and Exposition (APEC), 2019
This paper introduces a new fault-tolerant technique for three-phase three-level inverters based on sinusoidal pulse width modulation (SPWM). The existing fault-tolerant methods mainly depend on using space vector modulation (SVM) to utilize the redundant switching states at low modulation index.
Peter Azer, Saeed Ounie, Mehdi Narimani
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This paper introduces a new fault-tolerant technique for three-phase three-level inverters based on sinusoidal pulse width modulation (SPWM). The existing fault-tolerant methods mainly depend on using space vector modulation (SVM) to utilize the redundant switching states at low modulation index.
Peter Azer, Saeed Ounie, Mehdi Narimani
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IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society, 2014
This paper presents a novel DC-link voltage balancing algorithm for a 3-level DC/AC traction inverter drive. In this topology, two DC-link capacitor voltages and three-phase line currents are measured, to generate the control pulses for the traction inverter, based on space-vector pulse width modulation (SV-PWM) scheme.
Abhijit Choudhury +2 more
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This paper presents a novel DC-link voltage balancing algorithm for a 3-level DC/AC traction inverter drive. In this topology, two DC-link capacitor voltages and three-phase line currents are measured, to generate the control pulses for the traction inverter, based on space-vector pulse width modulation (SV-PWM) scheme.
Abhijit Choudhury +2 more
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2015 IEEE International Electric Machines & Drives Conference (IEMDC), 2015
This paper presents a performance comparison study between the proposed continuous- and discontinuous-hybrid-PWM (C-HPWM, D-HPWM) based techniques used for neutral point clamped (NPC) 3-level inverter. The H-PWM strategy uses both the advantages of carrier and space vector based PWM strategies.
Abhijit Choudhury +2 more
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This paper presents a performance comparison study between the proposed continuous- and discontinuous-hybrid-PWM (C-HPWM, D-HPWM) based techniques used for neutral point clamped (NPC) 3-level inverter. The H-PWM strategy uses both the advantages of carrier and space vector based PWM strategies.
Abhijit Choudhury +2 more
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