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All Journal Journal of Engineering and Technological Sciences Omega: Jurnal Fisika dan Pendidikan Fisika
Dessy Amirudin
School of Electrical Engineering and Informatics. Institute of Technology Bandung
Education Engineering Physics

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Analysis of Input and Output Ripples of PWM AC Choppers Dahono, Pekik Argo; Amirudin, Dessy; Rizqiawan, Arwindra; Deni, Deni
Journal of Engineering and Technological Sciences Vol 40, No 2 (2008)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (372.009 KB) | DOI: 10.5614/itbj.eng.sci.2008.40.2.2

Abstract

This paper presents an analysis  of input and output ripples of PWM AC  choppers.  Expressions  of  input  and  output  current  and  voltage  ripples  of single-phase PWM AC choppers are first derived. The derived expressions are then  extended  to  three-phase  PWM  AC  choppers.  As  input  current and  output voltage ripples specification alone cannot be used to determine the unique values of inductance and capacitance of the LC filters, an additional criterion based on the  minimum reactive  power  is  proposed.  Experimental results  are included  in this paper to show the validity of the proposed analysis method.
Effect of Task Through Test Rankings Based Learning Model REACT to the Achievement of Physics Amirudin, Dessy; Kusdiwelirawan, A.; Soenarto, Y.
Omega: Jurnal Fisika dan Pendidikan Fisika Vol 3 No 2 (2017)
Publisher : Program Studi Pendidikan Fisika UHAMKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31758/OmegaJPhysPhysEduc.v3i2.31

Abstract

The aim of this study is to find out the effect of test-based on the ranking task through the learning model of REACT (relating, experiencing, applying, cooperating, and transferring) toward physics learning achievement. The research is held in 105 Senior High School in Jakarta on the even semester of 2015-2016. The population in this research is around 32 students roommates are all investigated. The sampling technique that use is purposing sampling technique. This research use quantitative research. After the data is distributed normally and the homogeneity based on the normality test and homogeneity, the data that is gained the lcount < ltable (0.11 < 0.156). The hypothesis test is done by using the t-test and the result tcount > ttable (8.575 > 1.689) (on the 0.05 significant extent) or 8.575 > 2.456 (on the 0.01 significant extent) which means H0 is rejected, H1 is therefore accepted. All in all this research could bring the effect of test-based on the ranking task learning model through the REACT toward physics learning achievement.
Co-Authors A. Kusdiwelirawan Arwindra Rizqiawan Deni Deni Pekik Argo Dahono Soenarto, Y.