Results 141 to 150 of about 2,459 (175)
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Reduction of line-current total harmonic distortion (THD) of a Valley Fill electronic ballast
2011 International Conference on Electronic Devices, Systems and Applications (ICEDSA), 2011This paper presents a modified Valley-Fill (VF) ballast circuit to combine with a current fed resonant inverter as the power circuit for a high power factor VF electronic ballast. The original VF circuit permit input current conduction from 30° to 150°, and then from 210° to 330°.
M Ziaur Rahman Khan
exaly +2 more sources
IEEE Transactions on Industrial Electronics, 2008
In this paper, a modified valley fill (VF) circuit is employed to combine with a current-fed resonant inverter as a passive high power factor (PF) electronic ballast. A conventional VF circuit limits the line current to conduct when the conduction angles are: 30deg les omegat les 150deg and 210deg les omegat les 330deg during the line period, which ...
J.C.W. Lam, P.K. Jain
exaly +2 more sources
In this paper, a modified valley fill (VF) circuit is employed to combine with a current-fed resonant inverter as a passive high power factor (PF) electronic ballast. A conventional VF circuit limits the line current to conduct when the conduction angles are: 30deg les omegat les 150deg and 210deg les omegat les 330deg during the line period, which ...
J.C.W. Lam, P.K. Jain
exaly +2 more sources
Pengaruh Total Harmonic Distortion (THD) Terhadap Pembacaan kWh Meter Semi Digital
JURNAL AMPLIFIER : JURNAL ILMIAH BIDANG TEKNIK ELEKTRO DAN KOMPUTER, 2022AbstrakEnergy measurement using a kWh meter must have good accuracy. The increasing use of non-linear electrical equipment causes harmonics in the network. This study aims to measure and analyze voltage, current, power, power factor and the percentage of Total Harmonic Distortion (THD).
Alex Surapati +2 more
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ANALIS PENGUKURAN DAN PERHITUNGAN TOTAL HARMONIC DISTORTION (THD) PADA BEBAN NON LINIER
Jurnal Sains & Teknologi Fakultas Teknik Universitas Darma Persada, 2022Harmonisa mengakibatkan terjadinya distorsi gelombang arus dan tegangan. Harmonisa terjadi karena adanya beban non linier, dimana akan terbentuk gelombang yang berfrekuensi tinggi yang merupakan kelipatan dari frekuensi fundamentalnya. Frekuensi harmonik yang lebih tinggi daripada frekuensi operasi memiliki efek mengurangi efisiensi atau menyebabkan ...
Tomy Nugroho, Istoni Reza
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Predicting total harmonic distortion (THD) in ADSL transformers using behavioural modeling
Proceedings of the 2003 IEEE International Workshop on Behavioral Modeling and Simulation, 2004As a design application, the ADSL broadband line transformer offers interesting challenges somewhat different to those in power supply design. The aspect of total harmonic distortion (THD) as affected by the nonlinear behaviour of the magnetic material in a line transformer is analysed using simulation.
P.R. Wilson, J.N. Ross, A.D. Brown
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Renewable Energy Focus, 2021
The non linear characteristic of transformer magnetizing core leads more current/voltage signal distortion in the event of system disturbance/fault. The harmonic penetration in the current signal depends of the transformer core, characteristic of load and abnormal conditions.
Maulik Raichura +3 more
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The non linear characteristic of transformer magnetizing core leads more current/voltage signal distortion in the event of system disturbance/fault. The harmonic penetration in the current signal depends of the transformer core, characteristic of load and abnormal conditions.
Maulik Raichura +3 more
openaire +1 more source
A Cost Effective Method of Reducing Total Harmonic Distortion (THD) in Single-Phase Boost Rectifier
2007 7th International Conference on Power Electronics and Drive Systems, 2007Due to its simplicity, the discontinuous conduction mode boost rectifier is potentially the least expensive active line-harmonics reducing circuit. The line current however, shows considerable distortion when the peak input voltage is close to the output voltage. This paper proposes a simple, low-cost method to reduce the line harmonics.
Hussain S. Athab, P. K. Shadhu Khan
openaire +1 more source
2013 IEEE ECCE Asia Downunder, 2013
A single phase transformerless semi-Z-source inverter topology is presented in this paper in order to incorporate distributed photovoltaic generators to the grid with reduced total harmonic distortion (THD) and DC current injection. These proposed inverter topologies are capable of achieving the sinusoidal output voltage by using only two active ...
Tofael Ahmed +2 more
openaire +1 more source
A single phase transformerless semi-Z-source inverter topology is presented in this paper in order to incorporate distributed photovoltaic generators to the grid with reduced total harmonic distortion (THD) and DC current injection. These proposed inverter topologies are capable of achieving the sinusoidal output voltage by using only two active ...
Tofael Ahmed +2 more
openaire +1 more source
Microprocessors and Microsystems, 2020
Abstract Multilevel inverter, switching points at the essential frequency are gained by measuring the total harmonics distortion (THD) in line – line voltage. In this work, an advancement procedure is proposed to register switching angles at basic frequency switching plan by implementing Nonlinear Transformational Optimization (NTO) technique, a like
R. Gunasekaran, C. Karthikeyan
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Abstract Multilevel inverter, switching points at the essential frequency are gained by measuring the total harmonics distortion (THD) in line – line voltage. In this work, an advancement procedure is proposed to register switching angles at basic frequency switching plan by implementing Nonlinear Transformational Optimization (NTO) technique, a like
R. Gunasekaran, C. Karthikeyan
openaire +1 more source