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Journal : Journal of Engineering and Technological Sciences

Analysis and Minimization of Output Current Ripple of Multiphase Carrier-Based PWM Inverters Dahono, Pekik Argo
Journal of Engineering and Technological Sciences Vol 42, No 1 (2010)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (274.069 KB) | DOI: 10.5614/itbj.eng.sci.2010.42.1.4

Abstract

Analysis  and  minimization  of  output  current  ripple  of  multiphase carrier-based PWM  inverters are presented in this paper.  Analytical expression of rms value of output current ripple of multiphase PWM inverters as a function of the reference signal is first derived. Based on this expression, it is shown that a pure sinusoidal signal is the optimum reference signal that results in minimum output  current  ripple.  Different  to  three-phase  PWM  inverters,  injection  of harmonics  into  the  sinusoidal  reference  signal  is  neither  necessary  nor  useful. The  rms  values  of  output  current  ripple  of  5-,  7-,  and  9-phase  PWM  inverters under various reference signals are compared. Experimental results are included to show the validity of the analysis method.
A New Control Method to Reduce the Low-Frequency Output Current Ripple of AC-DC Converters by Using Virtual Inductor Dahono, Pekik Argo
Journal of Engineering and Technological Sciences Vol 44, No 1 (2012)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (508.577 KB) | DOI: 10.5614/itbj.eng.sci.2012.44.1.4

Abstract

A new concept of virtual inductor to reduce the low-frequency dc output current ripple of ac-dc converters is introduced in this paper. Virtual inductor is defined as an additional control algorithm that changes the system behavior into the one that has an additional inductor connected on it. The virtual nature of the inductor makes the inductance can be designed without weight and volume restrictions. How to use the virtual inductor to improve the performance of converter current controller is discussed in this paper. Several simulated and experimental results are included to show the validity of the proposed concept.
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.
A New Voltage Control Method for Single-Phase PWM Inverters Dahono, Pekik Argo; Taryana, Een
Journal of Engineering and Technological Sciences Vol 43, No 2 (2011)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (255.179 KB) | DOI: 10.5614/itbj.eng.sci.2011.43.2.5

Abstract

A  new  voltage  control  method  for  single-phase  full-bridge PWM inverters  that having an output LC filter  is proposed in this paper. The proposed voltage  controller has a capability to realize a zero steadystate output voltage error with fast response. The zero steady-state output voltage error is achieved by using a controller that is derived by using the virtual LC resonant circuit. Fast response is obtained by using a virtual resistance  that  is  connected  in  parallel  with  the  filter  capacitor.  The validity of the proposed method is verified by experimental results.
A New Control Method to Reduce the Low-Frequency Output Current Ripple of AC-DC Converters by Using Virtual Inductor Pekik Argo Dahono
Journal of Engineering and Technological Sciences Vol. 44 No. 1 (2012)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.eng.sci.2012.44.1.4

Abstract

A new concept of virtual inductor to reduce the low-frequency dc output current ripple of ac-dc converters is introduced in this paper. Virtual inductor is defined as an additional control algorithm that changes the system behavior into the one that has an additional inductor connected on it. The virtual nature of the inductor makes the inductance can be designed without weight and volume restrictions. How to use the virtual inductor to improve the performance of converter current controller is discussed in this paper. Several simulated and experimental results are included to show the validity of the proposed concept.