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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 International Journal of Applied Sciences and Smart Technologies 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 Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology

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Journal : Makara Journal of Technology

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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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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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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.
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 Putri, Regina Chelinia Erianda 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