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A novel neutral point potential control for the three-level neutral-point-clamped converter
2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016Three-level neutral-point-clamped (NPC) converters/inverters have become a popular topology for not only medium-voltage (1k–33k) but also low-voltage level industrial application because of its reduced transistor block voltage and lower output current distortion.
Hsin-chih Chen +3 more
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Neutral point voltage control of neutral point clamped converters
2014The most widely used Medium Voltage multilevel converter is the 3-level AC/DC Neutral-Point Clamped (NPC) converter. It provides: a) twice the voltage rating, b) a reduction in the volumetric size and weight over the traditional 2-level converter. However, these benefits are lost when the Neutral Point (NP) drifts away from its ideal value (0 V).The ...
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Elimination of neutral point potential oscillations in the four pole neutral point clamped converter
2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia), 2017This paper investigates the effect of neutral point potential oscillation on four pole neutral point clamped converter. The detailed derivation indicates such oscillation is closely associated with neutral point current, so this paper presents a modulation technique to effectively eliminate this neutral point current. Besides, an offset injected method
null Meng-jiang Tsai, null Po-tai Cheng
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Active Neutral-Point Balancing of Three-Level Neutral-Point-Clamped Traction Inverters
2018 21st International Conference on Electrical Machines and Systems (ICEMS), 2018Recently, electric vehicles have become an integral part of the global mobility system. As the battery voltage of the electric vehicles is a much-discussed topic, the high voltage technology shows several benefits, such as accomplishing the increasing on-board power demand and facilitating the wiring and connectors.
Huihui Xu +3 more
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The Neutral Point on a Likert Scale
The Journal of Psychology, 1977Abstract It was hypothesized that the exclusion of a neutral point will not significantly affect an individual's composite score on a Likert-type scale. A sample of 200 undergraduates at Memphis State University was drawn from upper division sociology courses. Four unique arrangements of the Comrey and Newmeyer Radicalism-Conservatism scale (both forms
Rebecca F. Guy, Melissa Norvell
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Neutral point detection by satellites
Journal of Geophysical Research, 1974The concept of a neutral point depends on the physical phenomena described. The regions with B less than about 1 gamma detected by Schindler and Ness may be interpreted as neutral regions for the ion-tearing process. The assumption of the presence of a multiple neutral point structure (with temporal variations) is still the most promising ...
K. Schindler, N. F. Ness
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1994
In 1968 the journal Nature published a brief article written by the Japanese geneticist Kimura with the title “Evolutionary Rate at the Molecular Level” [6.1]. Kimura laid the foundations of neutral theory, one of the most important theories in modern evolutionary biology.
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In 1968 the journal Nature published a brief article written by the Japanese geneticist Kimura with the title “Evolutionary Rate at the Molecular Level” [6.1]. Kimura laid the foundations of neutral theory, one of the most important theories in modern evolutionary biology.
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An Example of Neutrally Nonwandering Points for the Inner Mappings that are Not Neutrally Recurrent
Ukrainian Mathematical Journal, 2016zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Neutral Point in the Geomagnetic Field
The Physics of Fluids, 1966The neutral point on the boundary of the geomagnetic cavity in the solar wind is discussed. From the equilibrium and stability conditions it is shown that the correct geometry of the neutral point is a cusp.
Harold Grad, Pung Nien Hu
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Neutral Point Discharge Experiment
Journal of the Physical Society of Japan, 1972The behavior of a plasma current through a magnetic neutral point is investigated experimentally. A quasi-steady magnetic field (either cusp or quadrupole magnetic field) is created by a slow capacitor discharge, and the plasma sheet current is excited by a slow capacitor discharge.
Nobuyoshi Ohyabu, Nobuki Kawashima
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