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All Journal Widya Teknik Jurnal Ilmiah Teknik Elektro Komputer dan Informatika (JITEKI) Proceeding of the Electrical Engineering Computer Science and Informatics Proceeding of the Electrical Engineering Computer Science and Informatics International Journal of Applied Sciences and Smart Technologies Abdimas Altruis: Jurnal Pengabdian Kepada Masyarakat Jurnal Nasional Teknik Elektro dan Teknologi Informasi

Bernadeta Wuri Harini

Universitas Sanata Dharma

Author-ID : 2989750

Humanities Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Social Sciences Other

Published : 12 Documents Claim Missing Document

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

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 SimulinkÂ®. 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 Wicaksono, Nanda Avianto; Harini, Bernadeta Wuri; Yusivar, Feri
Proceeding of the Electrical Engineering Computer Science and Informatics Vol 5: EECSI 2018
Publisher : IAES Indonesia Section

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.

Some Permanent Magnet Synchronous Motor (PMSM) Sensorless Control Methods based on Operation Speed Area Bernadeta Wuri Harini
Jurnal Ilmiah Teknik Elektro Komputer dan Informatika Vol 7, No 1 (2021): April
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/jiteki.v7i1.20519

This paper compares some sensorless Permanent Magnet Synchronous Motor (PMSM) controls for driving an electric vehicle in terms of operating speed. Sensorless control is a type of control method in which sensors, such as speed and position sensors, are not used to measure controlled variables.Â The controlled variable value is estimated from the stator current measurement. Sensorless control performance is not as good as a sensor-based system. This paper aims are to recommend a control method for the PMSM sensorless controls that would be used to drive an electric vehicle. The methods that we will discuss are divided into four categories based on the operation speed area.Â They are a startup, low speed, high speed, and low and high-speed areas. The low and high-speed area will be divided into with and without switching.Â If PMSM more work at high speed, the most speed area that is used, we prefer to choose the method that works at high speed, that is, the modification or combination of two or more conventional methods.

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

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

PELATIHAN PEMBUATAN MEDIA AJAR DAN SIMULASI UJIAN ANBK BERBASIS DARING Vittalis Ayu; Bambang Soelistijanto; Henricus Agung Hernawan; J.B. Budi Darmawan; Bernadeta Wuri Harini; Martanto Martanto
ABDIMAS ALTRUIS: Jurnal Pengabdian Kepada Masyarakat Vol 5, No 1 (2022): April 2022
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/aa.v5i1.3910

The education sector is one of the most impacted areas of the COVID-19 pandemic. Schools, which generally hold offline meetings, now have to transform into online sessions. With this pandemic, the teaching process must be "forced" to be online. The assignment model is usually given in physical mode (questions on paper, done and collected) is no longer relevant because of the limitations of physical meetings. On the other hand, students need an explanation from the teacher directly because they are familiar with the context of offline learning. Judging from the lack of computer ownership, whether owned by students or their parents, the technological literacy of the student and the teacher is required to carry out this teaching and learning process properly. To answer this problem, the Informatics and Electrical Study Program at Sanata Dharma University held training activities for making teaching media for SD Negeri Sawah teachers, who ultimately played an important role in improving teachers' technological literacy in carrying out online learning. In addition, at the school's request, we also held a phase 2 training targeting fourth-graders in preparation for the ANBK, a computer-based national exam they had to pass in the following year, which successfully increased the student's confidence to sit the test.

Pengaruh Parameter Motor pada Sistem Kendali tanpa Sensor Putaran Bernadeta Wuri Harini
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 10 No 3: Agustus 2021
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

In controlling permanent magnet synchronous motor (PMSM) without using a rotation sensor (sensorless control), some motor parameter data is needed. Among the motor parameters used in the control are stator resistance, inductance, and magnetic flux. This paper will analyze the effect of these parameter values in sensorless motor control. The parameter values will be varied so that the motor parameter values in the controller are different from the actual motor parameter values. The percentage of variation for each parameter varies depending on the influence of these parameters on control. The desired motor speed is 100 rad / second with controlling constants KP = 0.5, KI = 0.9, and KD = 100. The controller gain values (KP, KI, and KD) are obtained by the heuristic tuning method. Simulations are carried out for several differences in parameter values using Simulink. From the simulation results, it is found that the motor parameter values of the controller that are not the same as the actual motor parameter values will affect the control process. The difference in the motor parameter value between the controller and the actual value causes the motor not to rotate as the desired value.

The Effect of Motor Parameters on the Induction Motor Speed Sensorless Control System using Luenberger Observer Bernadeta Wuri Harini
International Journal of Applied Sciences and Smart Technologies Volume 04, Issue 01, June 2022
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v4i1.4518

The sensorless control system is a control system without a controlled variable sensor. The controlled variable is estimated using an observer. In this investigation, the sensorless control system is used to control induction motor speed. The observer that is used is the Luenberger observer. One of the drawbacks of the sensorless control system is precision motor parameter values. In this research, the effect of induction motor parameters in a speed sensorless control system, i.e. resistance and inductance motor, will be investigated. The differences in induction motor parameters between the controller and the actual value affect the system response. The value differences of Rr and Rs that can be applied are a maximum of 50%. However, the small differences in the inductance value greatly affect the system response. To get a good response, the value differences of Ls and Lr are between -5% to +5%, while the difference in the value of Lm is between -3% to +3%.

Perbandingan Dua Observer Kecepatan Motor Arus Searah pada Sistem Kendali tanpa Sensor Kecepatan Bernadeta Wuri Harini; Martanto; Tjendro
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 11 No 4: November 2022
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jnteti.v11i4.5019

In a sensorless motor speed control system, the motor speed is not directly measured using a speed sensor, but it is estimated using an observer. The sensorless speed control systems are mostly applied to AC motors, while they have not been widely applied to DC motors. Therefore, this paper presents simple observers to estimate the DC motor speed. The observers used were based on the DC motor electric equation. Two methods were used in this research. The first method was the observer estimating the speed based on the resistance inductance values (L-R method), while the second was the observer estimating the motor’s speed only based on the motor’s resistance value (R method). The speed was estimated using armature current (ia) and voltage (va). Therefore, a current and voltage sensor was used. Not only was the observer estimated, but it was also implemented on a real DC motor. An Arduino microcontroller was used to calculate the speed. The LN298 was used as a DC motor drive. Even though the R method is simpler, the test result showed that its speed estimation was less precise than the L-R method. By manual calculation, the motor speed estimation result in the L-R method had an error of 0.14%, while the motor speed estimation results in the R method had an error of 5.03%. The estimation results of motor speed implemented on a real DC motor and microcontroller system in the L-R method had an error of 3.98%, while the result of the estimation of motor speed in the R method had an error of 4.87%.

PELATIHAN GEOGEBRA UNTUK GURU-GURU SMA DI KALIMANTAN BARAT Bernadeta Wuri Harini; Djoko Untoro Suwarno; Martanto Martanto; Wiwien Widyastuti; Theresia Prima Ari Setiyani; Lusia Krismiyati Budiasih
ABDIMAS ALTRUIS: Jurnal Pengabdian Kepada Masyarakat Vol 5, No 2 (2022): Oktober 2022
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/aa.v5i2.4589

Mathematics and Physics are subjects that are not only difficult for students but also difficult for teachers. To make it easier to understand the material, Geogebra software is used. In this community service, Geogebra training was provided for high school teachers who are Mathematics and Physics teachers in West Kalimantan. The training was conducted online involving 10 lecturers and 5 assistants. The training consisted of 4 sessions carried out over 2 days which was attended by 31 teachers of Mathematics and Physics. The training is divided into 2 classes to be more effective. From the training results, there was an increase in the ability to use Geogebra by 38.05%. The average level of participant satisfaction with the implementation of the study is 4.15 on (a scale of 5)

Co-Authors Arif, Irvan Ayu, Vittalis Bambang Soelistijanto Djoko Untoro Suwarno Feri Yusivar Henricus Agung Hernawan Ignasius Eko Yuliyanto Irvan Arif J.B. Budi Darmawan Lusia Krismiyati Budiasih Martanto Martanto Martanto Martanto Martanto Nanda Avianto Wicaksono Rini Dwiastuti Theresia Prima Ari Setiyani Tjendro Tjendro Tjendro Wicaksono, Nanda Avianto Wiwien Widyastuti Y. B. Savio Surya Amanda Yusivar, Feri

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