Results 141 to 150 of about 631 (184)
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2013 Fourth International Conference on Intelligent Control and Information Processing (ICICIP), 2013
Diode neutral-point-clamped(NPC) three-level inverter has more significant characteristics than traditional two-level inverter, such as high utilization rate on voltage of the DC side, low harmonics output, small switching stress etc. There has no mature products of three-level inverter with control system until now.
Ping Li, Qingxiao Zhang
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Diode neutral-point-clamped(NPC) three-level inverter has more significant characteristics than traditional two-level inverter, such as high utilization rate on voltage of the DC side, low harmonics output, small switching stress etc. There has no mature products of three-level inverter with control system until now.
Ping Li, Qingxiao Zhang
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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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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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IECON'99. Conference Proceedings. 25th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.99CH37029), 2003
To compensate for the zero sequence current arising from asymmetrical operation of a transmission line, a neutral point clamped (NPC) inverter with a fourth wire must be employed. The most significant challenge arising from controlling of the four-wire NPC inverter consists in stabilizing the neutral point potential at the DC link middle value.
null Xioming Yuan +2 more
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To compensate for the zero sequence current arising from asymmetrical operation of a transmission line, a neutral point clamped (NPC) inverter with a fourth wire must be employed. The most significant challenge arising from controlling of the four-wire NPC inverter consists in stabilizing the neutral point potential at the DC link middle value.
null Xioming Yuan +2 more
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2015 IEEE Energy Conversion Congress and Exposition (ECCE), 2015
This paper studies the modeling, switching strategy and control scheme for NPC three-level (NPC-3L) inverter fed dual-three-phase permanent magnet synchronous motor (PMSM) drives. Firstly, the dynamic modeling of the system is described and analyzed.
Zheng Wang, Jian Chen, Ming Cheng
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This paper studies the modeling, switching strategy and control scheme for NPC three-level (NPC-3L) inverter fed dual-three-phase permanent magnet synchronous motor (PMSM) drives. Firstly, the dynamic modeling of the system is described and analyzed.
Zheng Wang, Jian Chen, Ming Cheng
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IEEE Transactions on Power Electronics, 2016
A simplified pulse width modulation (PWM) strategy for a neutral-point-clamped three-level converter with unbalanced dc links is proposed in this paper to achieve high-quality line-to-line output voltages and to maximize the linear modulation range. The simplified strategy takes the direct output voltage modulation by calculating the special solutions ...
Zongbin Ye +5 more
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A simplified pulse width modulation (PWM) strategy for a neutral-point-clamped three-level converter with unbalanced dc links is proposed in this paper to achieve high-quality line-to-line output voltages and to maximize the linear modulation range. The simplified strategy takes the direct output voltage modulation by calculating the special solutions ...
Zongbin Ye +5 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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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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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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IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
This paper is to study the control scheme for neutral-point-clamping three-level (NPC-3L) inverters fed dual three-phase permanent magnet synchronous motor (PMSM) drives based on vector space decomposition (VSD). The key is to propose a novel VSD based space vector modulation (SVM) strategy for the dual-three phase drives.
Zheng Wang +3 more
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This paper is to study the control scheme for neutral-point-clamping three-level (NPC-3L) inverters fed dual three-phase permanent magnet synchronous motor (PMSM) drives based on vector space decomposition (VSD). The key is to propose a novel VSD based space vector modulation (SVM) strategy for the dual-three phase drives.
Zheng Wang +3 more
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