Results 11 to 20 of about 7,633,646 (255)

Research on the Time-Domain Dielectric Response of Multiple Impulse Voltage Aging Oil-Film Dielectrics

Energies, 2021
Power capacitors suffer multiple impulse voltages during their lifetime. With the multiple impulse voltage aging, the internal insulation, oil-film dielectric may deteriorate and even fail in the early stage, which is called accumulative effect.
Chenmeng Zhang, Kailin Zhao, Shijun Xie, Can Hu, Yu Zhang, Nanxi Jiang   +5 more
doaj   +2 more sources

Evaluation of Lightning Impulse Test by Frequency Response Analysis [PDF]

, 2006
In this work are presented the basis for improving the interpretation of transformer lightning impulse test and the development of a graphical user interface system, which allows comparisons of time domain data and frequency response.
Jorge Ramirez, Baudilio Valecillos, Valecillos, Baudilio, Ramírez, Jorge   +3 more
core   +3 more sources

Improved multiple vector model predictive torque control of permanent magnet synchronous motor for reducing torque ripple

IET Electric Power Applications, 2021
The two‐voltage‐vector (2VV) model predictive torque control (MPTC) has been widely discussed and compared to the conventional single‐voltage‐vector (1VV) MPTC in permanent magnet synchronous motor drive applications, where it was shown to have quick ...
Jianzhen Qu, Juri Jatskevich, Chengning Zhang, Shuo Zhang   +3 more
doaj   +1 more source

Application of Non-Destructive Condition Monitoring Techniques on Irradiated Low Voltage Unshielded Nuclear Power Cables

IEEE Access, 2020
In this paper, the effect of radiation stress on the overall degradation of jacket and insulation of low voltage unshielded power cable used in nuclear power plants is discussed.
Ehtasham Mustafa, Ramy S. A. Afia, Zoltan Adam Tamus   +2 more
doaj   +1 more source

A hybrid multilevel converter for medium and high voltage applications [PDF]

, 2010
This paper investigates the suitability of the hybrid multilevel converter for medium and high voltage application. The converter operation, modulation, and capacitor voltage balancing method are described in detail.
Ahmed, Khaled, Adam, Grain Philip, Finney, Stephen, Singh, N.K., Williams, Barry   +4 more
core   +3 more sources

Multi-Target Control Strategy of DFIG Using Virtual Synchronous Generator Based on Extended Power Resonance Control under Unbalanced Power Grid

Energies, 2020
Virtual synchronous generator control is considered as an effective solution to optimize the frequency response characteristics of doubly fed induction generator.
Dan Sun, Yangming Wang, Tianlong Jiang, Xiaohe Wang, Jun Sun, Heng Nian   +5 more
doaj   +1 more source

Extended Application for the Impulse-Based Frequency Response Analysis: Preliminary Diagnosis of Partial Discharges in Transformer

IEEE Access, 2020
Frequency response analysis (FRA) with low impulse voltage signals (IFRA) is useful in diagnosing faults like the mechanical displacements and inter-turn shorts in transformers.
Kamalaselvan Arunachalam, Balasubramanian Madanmohan, Rajesh Rajamani   +2 more
doaj   +1 more source

Diagnosis of Multiple-Voltage Design with Bridge Defect [PDF]

, 2009
Multiple voltage is an effective dynamic power reduction design technique commonly used in low-power ICs. To the best of our knowledge, there is no reported work for diagnosing multiple-voltage enabled ICs, and the aim of this paper is to propose a ...
Harrod, Peter, S.M. Reddy, Al-Hashimi, Bashir M, S. Khursheed, B.M. Al-Hashimi, Khursheed, Saqib, P. Harrod, Reddy, Sudhakar M, Reddy, Sudhakar M., Khursheed, Syed Saqib, Al-Hashimi, Bashir   +10 more
core   +2 more sources

Vector control of the single-phase inverter based on the extended and virtual circuits

CES Transactions on Electrical Machines and Systems, 2018
A vector control based on the extended equivalent circuit and virtual circuits is proposed for the single-phase inverter. By the extended circuit, the other two phase voltages can be extended by the output voltage of the single-phase inverter so as to ...
Tao Xu, Ming Yang, Naizhe Diao, Xianrui Sun, Suliang Wu, Zhuangzhuang Shen, Hongzhi Chen, Chonghui Song   +7 more
doaj   +1 more source

An Extended-State Observer Based on Smooth Super-Twisting Sliding-Mode Controller for DC-DC Buck Converters

Mathematics, 2023
This paper designs a novel smooth super-twisting extended-state observer (SSTESO)-based smooth super-twisting sliding-mode control (SSTSMC) scheme to promote the robust ability and voltage-tracking performance of DC-DC buck converters.
Dian Jiang, Yunmei Fang, Juntao Fei
doaj   +1 more source