Results 21 to 30 of about 661,691 (270)

A VSC transmission system using flying capacitor multilevel converters and selective harmonic elimination pWM control [PDF]

, 2005
A transmission system based on voltage-source three-level flying capacitor (FC) multilevel converters with selective harmonic elimination pulse-width modulation (SHE-PWM) control is presented in this paper.
Lie Xu, Agelidis, V.G., V.G. Agelidis, Xu, L.   +3 more
core   +1 more source

Comparative analysis of principal modulation techniques for modular multilevel converter and a modified reduced switching frequency algorithm for nearest level pulse width modulation

Electrical engineering & Electromechanics
Introduction. The Modular Multilevel Converter (MMC) is an advanced topology widely used in medium and high-power applications, offering significant advantages over other multilevel converters, including high efficiency and superior output waveform ...
M. Benboukous, H. Bahri, M. Talea, M. Bour, K. Abdouni   +4 more
doaj   +1 more source

Carrier-Based PWM Strategy of Three-Level Neutral-Point-Clamped Inverter With Optimal Extension Mode

IEEE Open Journal of Power Electronics
Neutral point voltage ripple is the main technical drawback of the three-level neutral-point-clamped (3L-NPC) inverters. Conventional hybrid PWM strategies, which combine zero sequence voltage injection PWM (ZVI-PWM) with double modulation wave PWM (DMW ...
Guozheng Zhang, Yufei Liu, Xin Gu, Wenhao Huang, Wei Chen   +4 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

IEEE 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, Xinmei Huang, Jinping Wang, Jianing Wang, Jinsong Li   +4 more
doaj   +1 more source

Interleaved Pulse Width Modulation Based on Modified Carrier in Parallel Operation

IEEE Access, 2021
An interleaved pulse width modulation (PWM) can be employed in a parallel operation of three-phase converters because the interleaved PWM increases the equivalent switching frequency and significantly enhances the output current harmonics.
Hyun-Sam Jung
doaj   +1 more source

A Soft-Switching Control for Cascaded Buck-Boost Converters Without Zero-Crossing Detection

IEEE Access, 2019
This paper proposes a novel soft-switching control without zero-crossing detection for the cascaded buck-boost converters (CBBCs). The proposed soft-switching control consists of two parts: soft-switching modulation and closed-loop control.
Jingrong Yu, Maoyun Liu, Dongran Song, Jian Yang, Mei Su   +4 more
doaj   +1 more source

Modified Phase-Shifted PWM for Cascaded Half-Bridges of Photovoltaic Application

IEEE Access, 2020
Photovoltaic power plants are generally far away from loads such as cities and industrial zones. Moreover, long-distance power transmission for renewable energy will become an inevitable trend in the future.
Xiaoguang Diao, Fei Liu, Yuan Song, Yizhan Zhuang, Mengyue Xu, Xiaoming Zha   +5 more
doaj   +1 more source

CONTROL TECHNIQUES FOR VARIOUS BIPOLAR PWM STRATEGIES OF THREE PHASE FIVE LEVEL CASCADED INVERTER [PDF]

Journal of Engineering Science and Technology, 2015
This paper presents different types of bipolar Pulse Width Modulation (PWM) strategies for the chosen Cascaded MultiLevel Inverter (CMLI). The main purpose of MLI is to use power semiconductor devices of lower voltage ratings to realize high voltage ...
C. R. BALAMURUGAN, S. P. NATARAJAN, R. BENSRAJ   +2 more
doaj  

Modified phase-shifted PWM control for flying capacitor multilevel converters [PDF]

, 2007
The issue of voltage imbalance remains a challenge for the flying capacitor multilevel converter. The phase-shifted pulsewidth modulation (PS-PWM) method has a certain degree of self-balancing properties.
Chunmei Feng, Vassilios G. Agelidis, Liang, J., Agelidis, V.G., Jun Liang, Feng, C.   +5 more
core   +2 more sources

Droplet size spectrum, velocity, angle and flow rate of pulse-width-modulated spray nozzles with adjuvants. [PDF]

Pest Manag Sci
Optimizing PWM performance requires not only appropriate duty cycle selection, but also careful choice of adjuvant formulation tailored to each nozzle type. Drift control agents increased droplet size and reduced fine droplets, mitigating PWM‐induced variability. Decreasing the duty cycle consistently narrowed the spray angle.
da Cunha JPAR, Ozkan E, Jeon H, Zhu H.
europepmc   +2 more sources