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Sine wave

About: Sine wave is a research topic. Over the lifetime, 12183 publications have been published within this topic receiving 93013 citations. The topic is also known as: sinusoid.


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Proceedings ArticleDOI
20 Jun 2004
TL;DR: In this paper, the ripple component of the single-phase instantaneous active and reactive power is detected and sorted in the AC reactor, and some significant characteristics are verified by means of a simulation with a 200 V/3.7 kW PM motor.
Abstract: This paper deals with a new approach for single to three phase matrix converters. In almost all of these converters, three-phase voltages and currents are distorted because of the inherent fluctuation of single-phase instantaneous power. On the contrary, in our proposed matrix converter, that fluctuation is compensated for and three phase voltages and currents can be controlled to be pure sine wave. Our circuit is composed of the conventional single to three-phase matrix converter circuit, an AC reactor and three bi-directional switches. By using the single-phase instantaneous active and reactive power theory (ps-qs theory), the ripple component of the single-phase instantaneous power is detected and is sorted in the AC reactor. Some significant characteristics are verified by means of a simulation with a 200 V/3.7 kW PM motor.

40 citations

Journal ArticleDOI
TL;DR: This method introduce sine wave is compared with the triangular carrier wave with different phase relationship and the PWM control strategy method for multi level inverter to reduce the total harmonics distortion in the output waveform is proposed.
Abstract: In this paper proposes a SPWM control strategy fifteen level cascaded Hbridge multi level inverter. This method introduce sine wave is compared with the triangular carrier wave with different phase relationship. The carrier based Phase disposition PDPWM, PODPWM, APODPWM have been analyzed in this paper. The PWM control strategy method for multi level inverter to reduce the total harmonics distortion in the output waveform. The simulation is done by matlab / simulink environment.

40 citations

Journal ArticleDOI
TL;DR: In this article, a sine wave is fitted to the normalised differential current by using the least-squares technique for each phase, and the difference between the normalized differential currents and the fitted signals are calculated, which are hereafter named residual signals (RSs).
Abstract: This study deals with a method for discrimination between magnetising inrush and internal fault currents in three-phase transformers based on sine-wave curve fitting. A sine wave is fitted to the normalised differential current by using the least-squares technique for each phase. The difference between the normalised differential currents and the fitted signals are calculated, which are hereafter named residual signals (RSs). Maximum range of the RSs variations is utilised for the definition of a simple criterion. Based on this criterion, the discrimination is realised within less than a half cycle of power frequency. In order to eliminate the impact of the current transformer (CT) saturation on the performance of the proposed technique, the currents are compensated by a CT saturation compensation algorithm in the first step. The proposed method is evaluated and compared with some well-known methods by a large number of simulation and experimental data. Furthermore, the proposed algorithm is evaluated in the case of a transformer, which is fed through a feeder with series capacitors. The results confirm that reliability, accuracy and speed response of the proposed technique is more than the other methods.

40 citations

Journal ArticleDOI
TL;DR: In this paper, an off-shore oscillating water column for producing electricity from sea waves is presented. And a control strategy is developed with the objective of improving the quality of the energy absorbed by the device.

39 citations

Journal ArticleDOI
TL;DR: In this paper, the runup of tsunami waves on the coasts of the barrow bays, channels and straits is studied in the framework of the nonlinear shallow water theory.
Abstract: The runup of tsunami waves on the coasts of the barrow bays, channels and straits is studied in the framework of the nonlinear shallow water theory. Using the narrowness of the water channel, the onedimensional equations are applied; they include the variable cross-section of channel. It is shown that the analytical solutions can be obtained with use of the hodograph (Legendre) transformation similar to the wave runup on the plane beach. As a result, the linear wave equation is derived and all physical variables (water displacement, fluid velocity, coordinate and time) can be determined. The dynamics of the moving shoreline (boundary of the flooding zone) is investigated in details. It is shown that all analytical formulas for the moving shoreline can be obtained explicitly. Two examples of the incident wave shapes are analysed: sine wave and parabolic pulse. The last example demonstrates that even for approaching of the crest only, the flooding can appear very quickly; then water will recede relatively slowly, and then again quickly return to the initial state. Correspondence: Professor Efim Pelinovsky Laboratory of Hydrophysics and Nonlinear Acoustics, Institute of Applied Physics, 46 Uljanov Street, Nizhny Novgorod, 603950 Russia Email: Pelinovsky@hydro.appl.sci-nnov.ru Phone: 007-8312-164839 Fax: 007-8312-365976

39 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202378
2022157
2021138
2020253
2019344
2018336