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ARCPI resonant snubber for the neutral-point-clamped (NPC) inverter
Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370), 2003This paper reports a resonant snubber for the neutral-point-clamped (NPC) inverter using the auxiliary resonant commutated pole inverter (ARCPI) technique. The proposal guarantees zero-voltage switching of the main switches and zero-current switching of the auxiliary switches without incurring any voltage or current spikes across or through the main ...
null Xiaoming Yuan +2 more
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Optimal power control strategies for neutral point clamped (NPC) inverter topology
IEEE Transactions on Industry Applications, 1992A programmed pulsewidth modulation (PWM) technique for selectively eliminating several lower-order harmonics at the output of a neutral point clamped (NPC) inverter topology is investigated. The switching function approach is utilized to derive relevant analytical expressions for input/output variables.
P. Enjeti, R. Jakkli
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A New Three-Level Active Neutral-Point-Clamped (A-NPC) Multilevel Converter Topology
IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019This paper proposes a new three-level active neutral-point-clamped (A-NPC) converter topology. The classic three-level A-NPC converter's phase-leg (per-phase) comprises the four line-frequency (LF) and two full-cycle-switched high-frequency (HF) pulse-width-modulation (PWM) power switches such as the insulated-gate bipolar transistors (IGBTs).
Vahid Dargahi +2 more
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Model of three level neutral point clamped converter (NPC) for grid connected photovoltaic systems
2015 38th International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO), 2015Photovoltaic modules as direct converters of solar energy into electrical energy are typically connected to the power grid trough standard two level converters. A photovoltaic system can be connected to the power grid if it can satisfy the IEEE standardized conditions set by the power grid operator.
Novak, Mateja +2 more
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A soft commutated neutral-point-clamped (NPC) inverter: theory and experimentation
APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition, 2002A soft commutation circuit aimed to substitute for the conventional snubber in a GTO NPC inverter is presented in this paper. The small rating lossless auxiliary branch creates soft switching conditions for the main devices without having to subject them to extra voltage/current spikes or any modulation constraints.
null Xiaoming Yuan, I. Barbi
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Evaluation of soft switching techniques for the neutral-point-clamped (NPC) inverter
30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321), 2003This paper evaluates the topological variants of the soft switching NPC inverter based on the resonant pole techniques. Conventional dissipative and regenerative snubbers as well as soft switching techniques for NPC inverter discussed in the past decade are reviewed first.
X. Yuan, H. Stemmler, I. Barbi
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A neutral point clamped multilevel topology flow graph and space NPC multilevel topology
2015 IEEE Energy Conversion Congress and Exposition (ECCE), 2015Neutral-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 +2 more
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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 +3 more
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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 +3 more
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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
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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
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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), 1999This 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
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