Results 251 to 260 of about 733,251 (300)

Elimination of harmonic distortion in Vibroseis data

Geophysics, 1994
Abstract We present a new approach to eliminate the harmonic distortion in vibroseis data. This technique is based on the definition of the sweep for the case where the instantaneous frequency varies linearly with time. The method requires no more than the computation of a purely deterministic phase-shift filter that has the phase ...
Li, Xiao-Ping, Soellner, Walter, Hubral, Peter   +2 more
openaire   +1 more source

A Selective Harmonic Elimination Method for Five-Level Converters for Distributed Generation

IEEE Journal of Emerging and Selected Topics in Power Electronics, 2017
In distributed generation, high power capability and high efficiency are very important requirements. For this reason, this paper proposes a new analytical procedure for selective harmonic elimination in five-level inverters operating at fundamental ...
Carlo Cecati, Amarendra Edpuganti, Maria Gabriella Cimoroni   +2 more
exaly   +2 more sources

Harmonic elimination for PWM inverter

2017 International Conference on Consumer Electronics and Devices (ICCED), 2017
For a PWM inverter system, the output ac current is expected to be a sinusoidal waveform after filtering; however, PWM inverters have two drawbacks causing distortion of output waveform. One is the presence of harmonics, and the other is the variations of the system parameters.
Bo-Han Wang, Ruei-Yu Huang, An-Chen Lee
openaire   +1 more source

Harmonic Elimination

International Journal of Electrical Engineering & Education, 1982
A review of the techniques presently available for the control of harmonic content in three-phase a.c.-d.c. convertors is presented. It includes increased pulse numbers, harmonic filters and harmonic injection. Recent trends and main problem areas encountered in filter design are given special consideration.
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A new method for harmonic elimination

2011 Annual IEEE India Conference, 2011
A new filter strategy for harmonic elimination is introduced in this paper. The proposed approach eliminates all harmonics component from the signal (current or voltage) and it requires only knowledge of fundamental frequency of the signal. The proposed active series filter eliminates undesirable harmonics from periodic signal.
Sandeep V. Rode, Siddharth A. Ladhake
openaire   +1 more source

Review on the Methods of Harmonic Elimination

Advanced Materials Research, 2012
This paper describes the methods of Harmonic Elimination, with the development of power electronic equipment, harmonic pollution of power system is more and more serious traditional method for harmonic elimination and reactive power compensation is the LC power filter based on resonance principle, but this method can only eliminate the specified order ...
Xue Song Zhou, Guang Zhu Chen, You Jie Ma   +2 more
openaire   +1 more source

Optimal harmonic elimination control

2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551), 2004
Harmonic elimination and control has been a widely researched alternative to traditional PWM techniques. The equations that govern harmonic elimination have multiple solutions based on different switching angles. Each solution will result in the uncontrolled harmonic content having a unique distribution of energy. To determine which solution is optimal,
J.R. Wells, B.M. Nee, P.L. Chapman, P.T. Krein   +3 more
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Simulation of surplus harmonics in selective harmonic elimination technique

2016 IEEE International Conference on Mechatronics and Automation, 2016
Selective harmonic elimination technique can eliminate any order harmonics theoretically, but it is restricted by the initial value of switching angles and the switching speed of power device, therefore, it has surplus high-order harmonics. The surplus harmonics exist in the form of harmonics group, there is a window which harmonic wave amplitude close
Wenyi Zhang, Fangxin Guo, Ting Song, Qiang Zhang   +3 more
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Quantitative perturbation theory by successive elimination of harmonics

Celestial Mechanics & Dynamical Astronomy, 1993
This paper establishes the theoretical basis for the method presented by the first author [see the previous review, ibid., 101-130 (1993)]. Two theorems are proved. The first one proves the ``almost invariantness within the limit \(T\) in time'' of tori constructed by the method. These tori fill up in the phase space an open set \(A\), say.
A. Morbidelli, A. Giorgilli
openaire   +3 more sources

FIR bi notch filters as harmonics eliminators

Proceedings of the International Conference and Workshop on Emerging Trends in Technology, 2010
A methodology for designing FIR bi notch filters derived from second order prototype IIR notch filters is suggested. Rejection bandwidth for the designed filter can be controlled by suitable choice of 'r', the pole radius of the IIR prototype notch filters.
Rohini Deshpande, Balbir Kumar, Shail Bala Jain   +2 more
openaire   +1 more source