Results 61 to 70 of about 688 (209)

M3D‐DPWM strategy for three‐phase four‐leg inverter with higher harmonic suppression capability

IET Power Electronics, Volume 17, Issue 15, Page 2369-2379, 25 November 2024.
In this study, a modified 3D discontinuous pulse‐width modulation (M3D‐DPWM) strategy is proposed based on 3D‐SVPWM, By changing the sequence of reference voltage vector synthesis and reducing switching mode, the output phase voltage period is reduced to half of the original without changing the fundamental properties and adding additional circuits ...
Ning Li, Panpan Shen, Jie Li, Jiale Hu, Changjie Zhang   +4 more
wiley   +1 more source

MASH Δ-Σ DPWM based sliding-mode controller dedicating to high frequency SMPS

, 2011
référencé dans IEEE Xplore : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6020263&contentType=Conference+Publications&refinements%3D4294169605%2C4294751995%26sortType%3Ddesc_p_Publication_Year%26queryText%3Dlin-shiInternational ...
Li, Bo, Lin-Shi, Xuefang, Guo, Shuibao, Allard, Bruno   +3 more
core   +2 more sources

Torque ripple suppression in non‐commutation interval of the coreless brushless DC motor based on unipolar PWM predictive control

IET Power Electronics, Volume 17, Issue 13, Page 1621-1631, 14 October 2024.
An incremental predictive control strategy based on unipolar pulse width modulation (PWM) is proposed in the non‐commutation interval to double the current ripple frequency, which can reduce the current ripple. On this basis, the prediction equations of adjacent control periods are subtracted to eliminate the influence of non‐ideal back‐electromotive ...
Chong Zeng, Zhongxin Wan, Song Huang, Jiao He   +3 more
wiley   +1 more source

Novel clamping modulation for three‐phase buck‐boost ac choppers

Electronics Letters, Volume 60, Issue 13, July 2024.
Three‐phase ac choppers feature output voltage amplitude controllability and enable more compact system realizations compared to autotransformers. However, these systems suffer from offset voltage drift, which was so far addressed by means of lossy discharge resistors. This paper proposes and verifies experimentally a novel clamping modulation ensuring
David Menzi, Aobo Yang, Saransh Chhawchharia, Johann. W. Kolar   +3 more
wiley   +1 more source

Sector Subdivision Based SVPWM Strategy of Neutral-Point-Clamped Three-Level Inverter for Current Ripple Reduction

Energies, 2019
This paper presents a sector subdivision based space vector pulse width modulation (SVPWM) strategy with reduced current ripple for a three-level inverter.
Guozheng Zhang, Bingxu Wei, Xin Gu, Xinmin Li, Zhanqing Zhou, Wei Chen   +5 more
doaj   +1 more source

A novel programmed hybrid modulation for electromagnetic interference mitigation and current ripple control in miniaturised synchronous machine drives

IET Electric Power Applications, Volume 18, Issue 5, Page 527-542, May 2024.
A programmed hybrid spreading spectrum modulation method to mitigate electromagnetic interference (EMI) emission in the context of miniaturised and lightweight synchronous machine drives is proposed. The proposed method is well‐suited for controlling synchronous motors using three‐phase two‐level voltage source inverters.
Hongtai Ma, Li Li, Kunpeng Fan, Youguang Guo, Zhihui Jin, Jian Luo   +5 more
wiley   +1 more source

Design of Control System for 5MW Medium Voltage  Direct-Driven Wind Power Converter

Journal of Harbin University of Science and Technology, 2018
The diode threelevel neutralpointclamped (3LNPC) converter with full power is a promising multilevel topology in the application of wind power generation system.
DENG Xiao-xiang, DAI Chao-fan
doaj   +1 more source

New single‐stage bidirectional three‐phase ac‐dc solid‐state transformer

Electronics Letters, Volume 60, Issue 2, January 2024.
This letter extends a new isolated bidirectional three‐phase buck‐boost power‐factor‐correction rectifier concept to medium‐voltage input, resulting in an solid‐state transformer (SST) that performs MVac‐LVdc conversion in a single converter stage and, unlike many modular SST concepts, employs only a single medium‐frequency transformer.
Rafał Kopacz, David Menzi, Florian Krismer, Jacek Rąbkowski, Johann W. Kolar, Jonas Huber   +5 more
wiley   +1 more source

Current fluctuations reduction strategy based on optimal three‐space‐vector pulse‐width modulation for service‐life improvement of DC‐link electrolytic capacitors in three‐phase voltage‐source inverter system

IET Electric Power Applications, Volume 18, Issue 1, Page 128-140, January 2024.
Based on space voltage vector, a voltage vector combination was derived to minimise the capacitor current within a single switching cycle. Compared to the traditional SVPWM, experimental results have shown that the rms value of capacitor current can be reduced by up to 37%.
Peihe Li, Anwen Shen, Qipeng Tang, Xin Luo, Jinbang Xu   +4 more
wiley   +1 more source

Dithered multi-bit sigma-delta modulator based DPWM for DC-DC converters

, 2015
                           Multi-bit sigma-delta based digital pulse width modulators (DPWM) are used in the control of DC-DC converters in order to achieve high resolution and therefore high output voltage accuracy at switching frequencies up to ...
O\u27Brien, Vincent, Mark Halton, PETAR IORDANOV (12351469), Vincent O'Brien, Vincent O'Brien (12581938), Petar Iordanov, Mooney, James, Halton, Mark, James Mooney (4442092), Iordanov, Petar, James Mooney, MARK HALTON (12350410)   +11 more
core   +1 more source