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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Mechatronics, Electrical Power, and Vehicular Technology Proceeding of the Electrical Engineering Computer Science and Informatics Jurnal Nasional Teknik Elektro dan Teknologi Informasi Makara Journal of Technology International Journal of Electrical, Computer, and Biomedical Engineering (IJECBE)
Feri Yusivar
Department Of Electrical Engineering, Universitas Indonesia
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology

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Stator Flux Oriented Control of Three-Phase Induction Motor with Improved Decoupling Scheme Irvan Arif; Bernadeta Wuri Harini; Feri Yusivar
Proceeding of the Electrical Engineering Computer Science and Informatics Vol 5: EECSI 2018
Publisher : IAES Indonesia Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1357.296 KB) | DOI: 10.11591/eecsi.v5.1662

Abstract

This paper proposes an improved decoupling scheme of stator flux-oriented control for three-phase induction motor. The simulation software used in this paper is MATLAB Simulink®. The result of the simulation indicates that this stator flux-oriented control can control the speed of the rotor angle and stator magnetization current successfully. The angular velocity of 120 rad/s achieved by settling time 2 seconds in critically-damped response and steady-state error 0.083%. The controller can overcome the external disturbance in the form of load torque of 5 Nm which has been simulated in this paper. The proposed stator voltage decoupling scheme which is used in this simulation is correct and become one of success factor of this control method.
Sensorless PMSM Control using Fifth Order EKF in Electric Vehicle Application Nanda Avianto Wicaksono; Bernadeta Wuri Harini; Feri Yusivar
Proceeding of the Electrical Engineering Computer Science and Informatics Vol 5: EECSI 2018
Publisher : IAES Indonesia Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (481.817 KB) | DOI: 10.11591/eecsi.v5.1667

Abstract

This paper is intended to design a controller and an observer of a sensorless PMSM (permanent magnet synchronous motor) in electric vehicle application. The controller uses the field orientation control (FOC) method and the observer type is the fifth order extended Kalman filter (EKF). The designed controller and observer are tested by varying the elevation angle of the route that is several times abruptly changed. The simulation result shows that the designed controller and observer can respond to the elevation angles given.
Design of Induction Motor Drive Without Velocity Sensor Using Current Vector Controller with Full and Reduced Observer Moving to DQ Axis Gunawan, Ridwan; Yusivar, Feri; Wahab, Wahidin; Kadir, Zuhal A.
Makara Journal of Technology Vol. 10, No. 1
Publisher : UI Scholars Hub

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Abstract

Design of Induction Motor Drive Without Velocity Sensor Using Current Vector Controller with Full and Reduced Observer Moving to DQ Axis. The observer is used in estimation velocity sensor usually in α-β axis, therefore this situation will need an extra transformation when we want to add compensator because the flux model is in direct and quadrature-axis dq. Every used the transformation to make possible emerge an error. So in this simulation is used a method to estimate the velocity of induction motor drive with observer that is moved to dq-axis. The model of actual motor used is in alfa-beta axis, but the observer use the motor models in rotor flux oriented control (RFOC).This matter, also to prove that the different models of motor drives can be used between the actual and estimated one. The simulation results with C-MEX S-function Matlab/Simulink 6.5 to show that the full order observer in dq axis gives better performance than the reduced order observer.
Modeling of a New Structure of Precision Air Conditioning System Using Secondary Condenser for Rh Regulation Subiantoro, Aries; Nasruddin, Nasruddin; Yusivar, Feri; Al-Hamid, Muhammad Idrus; Budiardjo, Bagio
Makara Journal of Technology Vol. 16, No. 1
Publisher : UI Scholars Hub

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Abstract

A dynamic mathematical model for a new structure of precision air conditioning (PAC) has been developed. The proposed PAC uses an additional secondary condenser for relative humidity regulation compared to a basic refrigeration system. The work mechanism for this system and a vapour-compression cycle process of the system are illustrated using psychrometric chart and pressure-enthalpy diagram. A non-linear system model is derived based on the conservation of mass and energy balance principles and then linearized at steady state operating point for developing a 8th-order state space model suited for multivariable controller design. The quality of linearized model is analyzed in terms of transient response, controllability, observability, and interaction between input-output variables. The developed model is verified through simulation showing its ability for imitating the nonlinear behavior and the interaction of input-output variables.
Simulasi Mesin Induksi Tanpa Sensor Kecepatan Menggunakan Pengendali Orientasi Vektor Feri Yusivar; Nanda Avianto Wicaksono
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 4 No 4: November 2015
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (537.755 KB)

Abstract

This research is intended to develop a speed sensorless induction machine model of wind turbine applications using vector orientation control method. This research is expected to use the results of previous research in induction motor applications, such as the development of adaptive vector control of sensorless induction motor for estimating the actual speed. The system in this paper consists of a wind turbine mechanical model, an induction machine model, and a vector orientation controller. The system is developed in S-Function C-MEX programs, and simulated using the MATLAB/Simulink. The system is tested in the condition that the wind speed and the reference rotor speed varies as step function. The results of the simulation show that the vector orientation controller is able to maintain the actual speed according to its reference, and the observer is able to estimate the actual rotor speed.
Simulasi dan Analisis Sistem Pengatur Tegangan DC Menggunakan Rangkaian Push-Pull Converter Feri Yusivar; Lintang Hapsari Wilujeng
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 3 No 4: November 2014
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (220.37 KB)

Abstract

A problem that often encountered in sources voltage especially DC (Direct Current) voltage sources are far below the working voltage levels that are generally used in residential electrical grid system. To handling the problems of the DC voltage source, one way that can be taken is to implement a DC voltage converter circuit or DC-DC Converter. In this paper, a series of isolated type DC-DC Converters, namely Push-Pull Converter, is being promoted. The Selection of Push-Pull Converter based on reliability and quality of generated power among others, ease of applicability and the most important is the robustness of the interference that may occur. The system is controlled by a simple linear controller, such as Proportional Integral (PI) controller or Integral Proportional (IP) controller. System’s stability is also tested using Bode plots. From simulation results and stability analysis, it can be conclude that the Push-Pull converter circuit resists against disturbance.
Effect of Inverter Frequency on Electric Motor-Driven Air Conditioning Systems Repurposed from Combustion Engine Cars for Electric Vehicle Applications Kenny, Jonathan; Yusivar, Feri
International Journal of Electrical, Computer, and Biomedical Engineering Vol. 2 No. 4 (2024)
Publisher : Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62146/ijecbe.v2i4.93

Abstract

This research introduces a framework for the adaptation of conventional automotive air conditioning systems in electric vehicle conversions by modifying them to operate with an electric motor driven by an inverter, aimed at reducing waste and promoting energy efficiency. The experiment was conducted on an AC system from a combustion engine car, tested independently to evaluate the effects of varying inverter frequencies on cooling performance and power consumption. Data were collected using multiple blower fan speeds, with additional alternator integration tested to maintain system efficiency. The results highlight optimal settings for minimizing energy consumption while achieving effective cooling, providing valuable insights for sustainable EV conversions.
Single observer speed sensorless field weakening control of two parallel motors Suprajitno, Agus; Yusivar, Feri; Halim, Abdul
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 15, No 4: December 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v15.i4.pp2058-2067

Abstract

Two induction motors with parallel connected stator windings supplied by a single inverter (single observer) with a field weakening control system. The objective of this study is to propose a torque production speed sensorless vector control technique for each parallel connected rotor by adding field weakening control to improve the performance of each motor and reducing the number of adaptive observers on each motor to a single observer. Design of a rotor flux-oriented control (RFOC) system. Simulation results with the C-MEX S-function of MATLAB/Simulink 2015b show that the proposed method works better and can be operated at speeds that exceed the nominal speed of the motor.
Fault Detection for Low Voltage System in Electric Vehicle Muhammad Anwar Sadat Faidar; Kamlasi, Dava; Yusivar, Feri
International Journal of Electrical, Computer, and Biomedical Engineering Vol. 1 No. 1 (2023)
Publisher : Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62146/ijecbe.v1i1.4

Abstract

With the rapid development of the electric vehicle ecosystem, there are concerns about the electrical safety of electric vehicles. This concern is caused by the problems with electric vehicles, which cannot be used when not used for a long time. This problem is caused by a low voltage rating that is not available when the electric vehicle is in that condition. In this study, an algorithm is proposed to support safety for the availability of low-voltage electrical energy, when electric vehicles are in use or not in use. The results of this research indicate that the created algorithm can provide safety for the availability of low voltage level electrical energy, by adjusting the lead-acid battery charging procedure, monitoring the low voltage level while it not in use, and making existing electric vehicles unable to move as long as problems with the low voltage level charging system cannot be resolved.
Co-Authors A Halim A. Subiantoro Abdul Halim Agus Suprajitno Al-Hamid, Muhammad Idrus Aries Subiantoro Avianto Wicaksono, Nanda Bagio Budiardjo Benyamin Kusumoputro Bernadeta Wuri Harini Budiyanto Budiyanto Canny Dahlia Hade Saputra Haslim Irvan Arif Ivan Husain Kadir, Zuhal A. Kamlasi, Dava Kenny, Jonathan Kusnan Nuryadi Lazarus Stefan Lintang Hapsari Wilujeng M. Shanizal M. Y. Farabi Muhammad Al-Hamid, Muhammad Muhammad Anwar Sadat Faidar Muhammad Rif’an Nanda Avianto Wicaksono Nanda Avianto Wicaksono Nasruddin Nasruddin Ni Luh Dharmaraditya R. Gunawan R. Suryadiningrat Rian Suryadiningrat Ridwan Gunawan Ridwan Gunawan Ridwan Gunawan Rif'an, Muhammad W. W. Ananduta Wahidin Wahab Wilujeng, Lintang Hapsari Y. Syaifudin Yasil Farabi Zuhal Kadir, Zuhal