Articles
<![CDATA[Analysis and Minimization of Output Current Ripple of Multiphase Carrier-Based PWM Inverters ]]>
<![CDATA[Dahono, Pekik Argo]]>
<![CDATA[ Journal of Engineering and Technological Sciences Vol 42, No 1 (2010) ]]>
Publisher : <![CDATA[ITB Journal Publisher, LPPM ITB ]]>
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DOI: 10.5614/itbj.eng.sci.2010.42.1.4
<![CDATA[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.]]>
<![CDATA[A New Control Method to Reduce the Low-Frequency Output Current Ripple of AC-DC Converters by Using Virtual Inductor ]]>
<![CDATA[Dahono, Pekik Argo]]>
<![CDATA[ Journal of Engineering and Technological Sciences Vol 44, No 1 (2012) ]]>
Publisher : <![CDATA[ITB Journal Publisher, LPPM ITB ]]>
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DOI: 10.5614/itbj.eng.sci.2012.44.1.4
<![CDATA[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.]]>
<![CDATA[Analysis of Input and Output Ripples of PWM AC Choppers ]]>
<![CDATA[Dahono, Pekik Argo]]>;
<![CDATA[Amirudin, Dessy]]>;
<![CDATA[Rizqiawan, Arwindra]]>;
<![CDATA[Deni, Deni]]>
<![CDATA[ Journal of Engineering and Technological Sciences Vol 40, No 2 (2008) ]]>
Publisher : <![CDATA[ITB Journal Publisher, LPPM ITB ]]>
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DOI: 10.5614/itbj.eng.sci.2008.40.2.2
<![CDATA[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.]]>
<![CDATA[A New Voltage Control Method for Single-Phase PWM Inverters ]]>
<![CDATA[Dahono, Pekik Argo]]>;
<![CDATA[Taryana, Een]]>
<![CDATA[ Journal of Engineering and Technological Sciences Vol 43, No 2 (2011) ]]>
Publisher : <![CDATA[ITB Journal Publisher, LPPM ITB ]]>
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DOI: 10.5614/itbj.eng.sci.2011.43.2.5
<![CDATA[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.]]>
<![CDATA[A current control method for bidirectional multiphase DC-DC boost-buck converter ]]>
<![CDATA[Gifari Iswandi Hasyim]]>;
<![CDATA[Sulistyo Wijanarko]]>;
<![CDATA[Jihad Furqani]]>;
<![CDATA[Arwindra Rizqiawan]]>;
<![CDATA[Pekik Argo Dahono]]>
<![CDATA[ International Journal of Electrical and Computer Engineering (IJECE) Vol 12, No 3: June 2022 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/ijece.v12i3.pp2363-2377
<![CDATA[In the future, more and more electric vehicle (EV) batteries are connected to the direct current (DC) microgrid. Depending on the battery state of charge, the battery voltage can be higher or lower than the DC microgrid voltage. A converter that is aimed to fulfil such function must be capable of working in both charging and discharging regardless the voltage level of the battery and DC microgrid. Battery performance degradation due to ripple current entering the battery is also a concern. In this paper, a converter that can minimize ripple current that entering battery and operate in two power-flow directions regardless of battery and DC microgrid voltage level is presented. A current control method for this kind of converter was proposed. Experiment on a prototype was conducted to prove the proposed converter current control method.]]>
<![CDATA[New bidirectional step-up DC-DC converter derived from buck- boost DC-DC converter ]]>
<![CDATA[Ridha D. N. Aditama]]>;
<![CDATA[Naqita Ramadhani]]>;
<![CDATA[Jihad Furqani]]>;
<![CDATA[Arwindra Rizqiawan]]>;
<![CDATA[Pekik Argo Dahono]]>
<![CDATA[ International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 12, No 3: September 2021 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/ijpeds.v12.i3.pp1699-1707
<![CDATA[This paper proposes a new bidirectional step-up DC-DC converter, namely modified buck-boost DC-DC converter. The proposed DC-DC converter was derived from the conventional buck-boost DC-DC converter. Output voltage expression of the proposed converter was derived by considering the voltage drops across inductors and switching devices. The results have shown that with the same parameter of input LC filter, proposed DC-DC converter has lower conduction losses. Moreover, the proposed DC-DC converter has lower rated voltage of filter capacitor than the conventional boost DC-DC converter which lead to cost efficiency. Finally, a scaled-down prototype of laboratory experiment was used to verify its theoretical analysis.]]>
<![CDATA[Simplified cascade multiphase DC-DC boost power converters for high voltage-gain and low-ripple applications ]]>
<![CDATA[Pekik Argo Dahono]]>
<![CDATA[ International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 12, No 1: March 2021 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/ijpeds.v12.i1.pp273-285
<![CDATA[This paper proposes two new simplified cascade multiphase DC-DC boost power converters with high voltage-gain and low ripple. All simplifications reduce the number of active switching devices from 2N into N, where N is the phase number. The first simplification reduces the number of inductors from 2N into N+1 and increases the number of diodes from 2N into (2N+1). The second simplification reduces the number of inductors from 2N into N+1 and increases the number of diodes from 2N into (3N+1). The second simplification needs inductors with smaller current rating than the first simplification. The expressions of output voltage as a function of load current are derived by taking into account the voltage drops across the inductors and switching power devices. Simulated and experimental results are included to show the basic performance of the proposed cascade multiphase DC-DC boost power converters.]]>
<![CDATA[Study of current ripple characteristics of inverter-fed multiple three-phase AC motors ]]>
<![CDATA[Anwar Muqorobin]]>;
<![CDATA[Pekik Argo Dahono]]>
<![CDATA[ International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 13, No 1: March 2022 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/ijpeds.v13.i1.pp68-83
<![CDATA[The need of higher power and more reliable applications have promoted the use of multiphase alternating current (AC) drives. Mostly the motors are used in wide speed operation range. To control the motors, in the low speed region the motors are operated under pulse width modulation (PWM) mode and in the high speed region, they use square wave mode. In this paper, the current ripple characteristics of inverter-fed multiple three-phase AC motors that are operated under dual mode operation (PWM and square wave modes) are investigated. The optimal motor stator winding configuration will be optimized from the viewpoint of inverter input and motor current ripples. Six-phase motor is used as the representative of even-phase motors and nine-phase motor for odd-phase motors. It is found that nine-phase motor is better than six-phase motor if dual mode operation is desired. Experimental results are incorporated to support the analytical results.]]>
<![CDATA[Input Current Ripple Analysis of Multiphase PWM Inverters ]]>
<![CDATA[Anwar Muqorobin]]>;
<![CDATA[Pekik Argo Dahono]]>
<![CDATA[ International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 9, No 3: September 2018 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/ijpeds.v9.i3.pp1432-1444
<![CDATA[This paper investigates the relationship between inverter phase number and inverter input current ripple. Analysis results show that increasing the phase number more than nine cannot provide significant input current ripple reduction. The input current ripple is not affected by the switching frequency. Simulation and experimental results are included in this paper to show the validity of the proposed analysis method.]]>
<![CDATA[A modified Cuk DC-DC converter for DC microgrid systems ]]>
<![CDATA[Andriazis Dahono]]>;
<![CDATA[Arwindra Rizqiawan]]>;
<![CDATA[Pekik Argo Dahono]]>
<![CDATA[ TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 18, No 6: December 2020 ]]>
Publisher : <![CDATA[Universitas Ahmad Dahlan ]]>
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DOI: 10.12928/telkomnika.v18i6.16466
<![CDATA[A new efficient step-updirect current-direct current (DC-DC) power converter that is suitable for DC microgrid systems is proposed in this paper. The proposed step-up DC-DC converter is derived from the conventional Cuk DC-DC power converter. Output voltage analysis that is useful to predict the conduction losses is presented. It is shown that the proposed step-up DC-DC converter is more efficient than the conventional DC-DC boost power converter. Current ripple analysis that is useful to determine the required inductors and capacitors is also presented. Experimental results are included to show the validity of the proposed step-up DC-DC power converter.]]>
