Results 21 to 30 of about 6,265,379 (293)

Neutral-Point Voltage Balancing Method for Three-Phase Three-Level Dual-Active-Bridge Converters

open access: yesEnergies, 2022
Three-phase three-level dual-active-bridge (3L-DAB3) converters are a potential topology for high-voltage and high-power applications. Neutral-point voltage balancing is a complex and important issue for three-level (3L) circuits.
Xinmi Wu, Yu Zhang, Jiawen Yang
doaj   +1 more source

Neutral Point in the Pendulum [PDF]

open access: yesNature, 1892
IN the theory of the pendulum the position of the neutral point of support is a matter of practical importance, which is, nevertheless, quite disregarded.
openaire   +2 more sources

A MODIFIED VIRTUAL SPACE VECTOR MODULATION TECHNIQUE FOR Z-SOURCE NPC INVERTERS [PDF]

open access: yesCarpathian Journal of Electrical Engineering, 2018
A modified virtual space vector modulation approach for the control of a Z-source neutral point clamped inverter is presented in this paper. This approach works perfectly for the traditional neutral point clamped inverter.
Francis EFFAH   +4 more
doaj  

Analysis of loss distribution for power devices of active neutral point clamped three-level inverter

open access: yesGong-kuang zidonghua, 2014
In view of problem of uneven loss distribution of power devices in running process of traditional neutral point clamped three level inverter, this paper introduced working principle and basic modulation strategy of active neutral point clamped three ...
ZHAO Xia   +4 more
doaj   +1 more source

Experimental Study of Negative Skin Friction of Pile Group Foundations for Offshore Wind Turbines on Artificial Islands

open access: yesJournal of Marine Science and Engineering
Constructing offshore wind turbines on artificial islands is considered a viable option, but negative skin friction (NSF) is a significant adverse factor that cannot be ignored.
Yeyu Yan   +5 more
doaj   +1 more source

Negative friction of single pile under different supporting conditions

open access: yesShuiwen dizhi gongcheng dizhi
The wetting-induced settlement and deformation of collapsible loess can generate negative pile–soil friction, thereby reducing the bearing capacity of the pile foundations and posing a threat to the superstructures.
Juan GUO   +4 more
doaj   +1 more source

A Novel Neutral Point Voltage Control Strategy for Three-Level NPC APF Based on SVPWM

open access: yesMATEC Web of Conferences, 2015
The unbalance of the neutral point voltage is an inherent problem of three-level neutral-point-clamped (NPC) Active Power Filter (APF); this paper analyzes the causes of unbalanced neutral point voltage and studies the reason of the unbalance of the ...
Yao Xiaolong   +3 more
doaj   +1 more source

A Carrier-Based PWM Strategy Providing Neutral-Point Voltage Oscillation Elimination for Multi-Phase Neutral Point Clamped 3-Level Inverter

open access: yesIEEE Access, 2019
General pulse width modulation (PWM) model for multi-phase neutral point (NP) clamped (NPC) 3-level inverter (3LI) is described. A novel PWM strategy for N -phase NPC 3LI with unconditional NP voltage balance is proposed as well as its carrier-based ...
Weidong Jiang   +4 more
doaj   +1 more source

Retrospective Analysis of Donor Lymphocyte Infusions in Pediatric Patients With Mixed Chimerism After Hematopoietic Stem Cell Transplantation

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Allogeneic hematopoietic stem cell transplantation (alloHSCT) is an essential therapy for several malignant and nonmalignant diseases, but relapse and graft loss remain the principal threats to its success. Routine monitoring of chimerism and minimal residual disease (MRD) enables early detection of imminent recurrence and guides ...
Carmen Junk   +10 more
wiley   +1 more source

Harmonic Analysis and Neutral-Point Potential Control of Interleaved Parallel Three-Level Inverters for Flywheel Energy Storage System

open access: yesFrontiers in Energy Research, 2022
Flywheel energy storage system is a popular energy storage technology, in which inverters are the center of electrical energy conversion, directly affecting the power capacity.
Zhongrui Li   +4 more
doaj   +1 more source

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