Results 241 to 250 of about 14,379,955 (286)

A New Balancing Algorithm of Neutral-Point Potential in the Three-Level NPC Converters

2008 IEEE Industry Applications Society Annual Meeting, 2008
The neutral-point (NP) potential of the three-level neutral-point-clamped converters is needed to maintain balanced. Zero-sequence voltage is the only freedom degree when carrier-based PWM is utilized. Appropriate zero-sequence voltage should be identified to control the NP potential.
Chenchen Wang, Yongdong Li
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A novel modulation strategy providing loss balancing and neutral point potential balancing for three-level active neutral-point-clamped converter

2015 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe), 2015
This paper proposes a novel PWM strategy for three-level active neutral-point-clamped (ANPC) converter, this strategy can balance the power losses of all semiconductors and eliminate the fluctuation in the neutral point voltage over full range of converter output voltage and for all load power factors of ANPC converter.
Bo Zhang, Qiongxuan Ge, Ping Wang, Xiaoxin Wang, Yang Yu   +4 more
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A modulation technique of neutral point clamped converters with common-mode voltage reduction and neutral-point potential balance

2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016
Common mode voltage output is closely associated with switching states in three-phase three-wire neutral-point clamped inverter. Detailed analysis shows avoiding redundant states can effectively improve the common mode voltage, so this paper proposes a pulse width modulation (PWM) technique with zero redundant states to reduce the common mode voltage ...
Meng-jiang Tsai, Meng-ru Tsai, Hsin-chih Chen, Yao-bang Wang, Po-tai Cheng   +4 more
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Neutral point potential balance control strategy of three level inverter

2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA), 2018
The paper analyzes the principle of diode-clamped three-level inverter mainly from the control strategy of three-level midpoint potential balance. It expounds the reason and harm of the point potential imbalance in the three-level inverter and uses the adjustment of the complementary vector relative working time to control the mid — point potential ...
Jun Tong, Jianwei Qiao, Lijun Liu, Yao Lu, Qian Zhang   +4 more
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A neutral-point potential balancing algorithm for five-level ANPC converters

2011 International Conference on Electrical Machines and Systems, 2011
Five-level active neutral-point-clamped (ANPC) converter is a newly emerging topology which can overcome the drawbacks of traditional neutral-point clamped (NPC) converters and flying-capacitor (FC) converters. Its dc-link is subdivided into two equal parts and the main problem is the neutral-point (NP) potential balancing.
Kui Wang, Yongdong Li, Zedong Zheng
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Improved multilevel inverter with neutral point potential balancing for high power application

2015 International Conference on Innovations in Information, Embedded and Communication Systems (ICIIECS), 2015
This paper presents low harmonic distortion and neutral-point potential (NPP) balancing in multilevel inverter using multicarrier pulse width modulation (PWM) for medium-voltage high-power industrial ac drives. This method is applicable for five-level inverters or higher.
null Logapriya J., S. Mohamedyousuf
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Model Predictive Pulse Pattern Control with Integrated Balancing of the Neutral Point Potential

2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe), 2019
A neutral-point-clamped inverter operated with optimized pulse patterns is considered with an induction machine. For this setup, a control method is proposed that achieves high-bandwidth control of the electromagnetic torque and machine magnetization through stator flux trajectory tracking while balancing the inverter's neutral point (NP) potential ...
Tobias Geyer, Vedrana Spudic
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An optimized neutral-point potential balancing algorithm for seven-level ANPC inverters

2017 IEEE Energy Conversion Congress and Exposition (ECCE), 2017
This paper decouples the floating capacitors voltage controlling and the neutral-point potential balancing of Seven-level Active Neutral-point-clamped (ANPC-7L) inverter by using the concept of average state, proposes a neutral-point potential balancing model based on zero-sequence voltage injection and derives the full controllable region of neutral ...
Weihui Sheng, Qiongxuan Ge
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A new interleaved three-level Boost converter and neutral-point potential balancing

2013 2nd International Symposium on Instrumentation and Measurement, Sensor Network and Automation (IMSNA), 2013
Due to a voltage imbalance of the divided capacitors in the output side of three-level Boost photovoltaic grid-connected inverter, a new topology of interleaved three-level Boost converters is presented. The proposed topology can balance the voltage of the divided capacitors through adjusting the duty cycle of the power switches.
Zhou Hao, Zhou Jing-hua, Hu Bing, Tong Chao-nan   +3 more
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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