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Waru Djuriatno
Departemen Teknik Elektro, Universitas Brawijaya

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PENERAPAN GEOFENCING SEBAGAI SISTEM PENGAWASAN PASIEN Hafidh Hidayat; Waru Djuriatno; Muhammad Aswin
Jurnal Mahasiswa TEUB Vol. 11 No. 1 (2023)
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Surveillance is necessary in the medical world, especially in the case of diseases with high transmission rates. Quarantine is imposed on people who have infected to prevent transmission. In the quarantine process, surveillance plays an important role in keeping the position of people who are under quarantine in the permitted zone, to do that, a device can be used to detect the location of these people and provide warnings if someone leaves the quarantine zone. Geofencing is defined as a perimeter for real-world geographic areas. The term geofencing refers to the technology to draw virtual boundaries on maps and trigger certain actions based on the boundaries. The application of geofencing in this research uses the radius method with a circle-shaped geofencing zone and the center point of the circle as a reference. If the distance of the object from the center point is greater than the radius of the geofencing zone, it indicates that the object is outside the geofencing zone. When the object coordinates exceed the specified radius (radius of the circle) then the system will trigger the apps to bring up a notification, so that the supervisor can act immediately. The application of geofencing can simplify the surveillance process because the supervisor can know exactly the location of the person being surveilled and can quickly take action if someone leaves the geofencing zone. Keyword: Geofencing, Geofence, Surveillance, GPS
PENGGUNAAN SEPIC CONVERTER PADA PENGEREMAN REGENERATIF MOTOR BRUSHLESS DIRECT CURRENT DENGAN SUPERKAPASITOR Rakha Ghilman Fakhruddin Yusuf; Waru Djuriatno; n/a Wijono
Jurnal Mahasiswa TEUB Vol. 11 No. 1 (2023)
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This research is to explain how to use the SEPIC Converter for regeneratif braking using a supercapacitor and its impact on the BLDC motor regeneratif braking process and the supercapacitor charging process. This research was conducted by simulating a BLDC motor regeneratif braking system with a supercapacitor load on the PSIM software. Tests were carried out by varying the duty cycle value of the MOSFET SEPIC converter with a value between 10% to 80% with binding variabels in the form of motor braking time, braking torque, converter input voltage and current, and converter output voltage and current. The results obtained in this study are, the greater the duty cycle value, the faster the braking of the BLDC motor will be. This is indicated by the braking torque which appears to be getting bigger. In addition, the duty cycle value also affects the working system of the converter, where when duty cycle value below 50% making it work as a buck converter or reducing voltage, and if the duty cycle value is below 50% it will make the converter work as a boost converter or voltage booster. Efficiency converters range from 90.8% to99.9% with a maximum efficiency value of 50% duty cycle, and a minimum efficiency value of 80% duty cycle. The duty cycle value also affects the supercapacitor charging process, where the smaller the duty cycle value makes more energy stored in the supercapacitor, due to the greater current flowing.Keywords : BLDC Motor, Regeneratif Braking, SEPIC converter, supercapacitor.
DESAIN KONVERTER SEPIC UNTUK METODE PENGEREMAN REGENERATIF EKSITASI MANDIRI PADA MOTOR INDUKSI 3 FASA SEBAGAI PENGISIAN BATERAI Muhammad Alman Wadi; Waru Djuriatno; Rini Nur Hasanah
Jurnal Mahasiswa TEUB Vol. 11 No. 1 (2023)
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Today the development of electric vehicles is starting to be widely used compared to fossil fuel vehicles, one example is the electric train. An electric train is a train whose propulsion system is an electric motor. An induction motor is an alternating current (AC) electric motor that operates on the basis of induction of the stator's magnetic field into the stator. Here the motor rotor current causes a magnetic field generated by the rotation of the rotor and the stator current. One of the important parameters contained in the vehicle is braking. The regenerative braking method was used in this study where the rotor of the induction motor rotates faster than the stator rotating field so that negative slip occurs and the machine supplies energy. Thus, we need a device that can increase and decrease the voltage of this energy so that it can be stored in the battery. Therefore, in this study the SEPIC topology converter will be used. SEPIC (Single Ended Primary Inductor Converter) is a type of converter that can work step up or step down by setting the duty cycle on the gate switch. By conducting research on the design of the SEPIC converter as a battery charger using PID control which has a function so that the system achieves the desired response, it is hoped that charging can be carried out whose output can match the battery specifications. In this study, software was used to test the system, namely MATLAB/Simulink with the grid frequency as the independent variable. The test results show that the input from the SEPIC converter has varying values such as the voltage above or below 14V. The output of the SEPIC converter voltage has an error and the battery SoC also varies at each grid frequency that supplies the induction motor with a range of 10 Hz – 100 Hz. Keywords: Regenerative Braking, Three-Phase Induction Motor, SEPIC Converter, PID Control, State of Charge (SoC), MATLAB/Simulink
DESAIN KONVERTER CUK PADA METODE PENGEREMAN REGENERATIF EKSITASI MANDIRI PADA MOTOR INDUKSI 3 FASA Ayatullah Farhan; Waru Djuriatno; Rini Nur Hasanah
Jurnal Mahasiswa TEUB Vol. 11 No. 1 (2023)
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The existence of transportation in Indonesia plays a very important role in facilitating human mobility to move from one place to another. The use of electric vehicles is one of the developments that is currently experiencing a lot of progress, including electric trains (KRL). As the name implies, KRL is sourced from electricity which is supplied to the train system, which is mainly used as a motor drive. When using a motorbike, the important parameter to consider is braking. One type of electric braking that is widelydeveloped is regenerative braking. Self-excitation method regenerative braking using a capacitor is one of the branches of regenerative braking. This type of braking uses motor excitation which will be stored in a capacitor. The resulting regeneration energy will be stored in a battery so that it is not wasted as heat alone, therefore to transfer power a DC-DC converter is needed to adjust the battery voltage. The CUK converter is selected to buck/boost the voltage to match the battery specifications. This research was carried out by simulating using Simulink/MATLAB software which is useful for analyzing the input and output of theconverter and the state of charge (SoC) on the battery. Based on the simulation, it shows that the output of the converter produces a voltage of 13.40 V at a grid frequency of 50 Hz with a SoC increase of 0.006426%. The test was carried out over the grid frequency range of 10-100 Hz which resulted in varying voltage errors and SoC increases.Kata Kunci— Things Three Phase Induction Motor, Regenerative Braking, DC-DC Converter, Capacitor, Frequency, State of Charge (SoC)
GUIDANCE SYSTEM MENGGUNAKAN SEGMENTASI RESNET-50 UNTUK KENDARAAN LISTRIK OTONOM Alfian Fitrayansyah; Waru Djuriatno; Eka Maulana
Jurnal Mahasiswa TEUB Vol. 11 No. 1 (2023)
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A thermal camera can function well in various environmental conditions with low visibility and high contrast. Thermal cameras can be used to identify objects through semantic segmentation. The image obtained by the thermal camera on the Autonomous Electric Vehicle (AEV) can be used to segment the location of cars, roads, trees, buildings, etc. at each pixel. Fully Convolutional Network (FCN)-ResNet-50 is one of the ResNet models that can be used to segment roads. The results of the AEV route segmentation are then used to determine the steering direction. The process takes place by utilizing the OpenCV library to determine the Region of Interest (ROI), changing the HueSturation-Value (HSV) value. This process is used to change the road segmentation to white, while the other segmentation will change color to black. Because the white color has a value of 255, andthe black color has a value of 0, it can be calculated and obtained as a comparison of the values of each pixel of the road segmentation image between the right and left sides of the road segmentation image. From the research results, the guidance system through determining the direction of the steering based on the results of road segmentation using the results of deploying the FCN-Resnet-50 model was successfully carried out through several stages, such as determining the Region of Interest (ROI), changing the Hue-Sturation-Value (HSV) value, etc. The error in giving steering recommendations is caused by the FCN-Resnet-50 model used which still has a lot of segmentation faults.Keywords: Autonomous electric vehicles, Guidance System, FCN-Resnet-50, Steering, Semantic Segmentation
ANALISIS PENGARUH KAPASITANSI KAPASITOR TERHADAP TORSI, TEGANGAN, DAN ARUS PADA SISTEM PENGEREMAN REGENERATIF EKSITASI MANDIRI PADA MOTOR INDUKSI 3 FASA teub elektro teub; Muhammad Rifqi Nur Sabilillah; Waru Djuriatno; Rini Nur Hasanah
Jurnal Mahasiswa TEUB Vol. 11 No. 2 (2023)
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The transportations have important role in facilitating population mobility, one of the transportations are the train. In order to decrease mass, speed up the movement, and decrease carbon emission, electrification has been done, so that electrical train was created. Three-phase induction motor is chosen as a mover because of its sturdiness, lack of brush and commutator, and also shock wave. Three-phase induction motor works using induction principle therefore the excitation can be obtained from stator induction to rotor. One of the most important parameters on the transportations is braking. Regenerative braking becomes an excellent option since it can obtain energy from braking process, it converts kinetic energy to electrical energy, in that case the motor act as a generator. It can occur when the slip is negative. Negative slip can be obtained when the synchronous speed is under the rotor speed. The testing to analyze capacitors capacitance for motor excitation is needed before applying to the real condition. The test has been done in two steps, there are noload test and loaded test using dc to dc converter and battery. The result from Simulink MATLAB 2022a simulation shows that the bigger capacitors capacitance, the lower regeneration frequency produced, so that the synchronous speed will be lower, then negative slip will be bigger that can inflict bigger braking torqueand bigger regeneration voltage. Keywords–– Capacitor Capacitance, Rotor Rotating Speed, Regeneration Voltage, Regenerative Braking, Synchronous Speed, Three-Phase Induction Motor, Torque
RANCANG BANGUN INTERKONEKSI RANGKAIAN BERBASIS CROSSBAR SWITCH DAN APLIKASI WEB Taqiy Asyam Listyawan; Waru Djuriatno; Raden Arief Setyawan
Jurnal Mahasiswa TEUB Vol. 11 No. 2 (2023)
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Breadboards are often used in electronics prototyping which have a construction with several IO pins that each pin has several interconnected points to IO. To connect these pins, jumper cables are used at the pin points are connected. The construction is similar to the crossbar switch. Crossbar switches have two lines, namely horizontal and vertical with a relay at each intersection.The construction can be used as a circuit interconnect programmatically through a web application. In this design, the design is divided into five parts, including: crossbar switch module design, control module, disconnect function and connect function. The result of this design is the vertical crossbar switch lines are used as IO pins while the horizontal lines are used as line like a jumper cable. BL155 is used for relay. In this test, the relay resistance between IO and the line around 0.2Ohm – 0.3Ohm. The voltage drop on the relay is not found. Application test shows that the application is able to make the steps of disconnection, connection, and changing the address on the application to the address on the device. Keywords : Breadboard, Crossbar Switch, Web Application, Electronic Prototyping, BL1555 DAFTAR PUSTAKAFaudin, A. (2017, Juli 24). Memahami dengan mudah apa itu breadboard atau project board. Diambil kembali dari Nyebarilmu.com: https://www.nyebarilmu.com/memahami-dengan-mudah-apa-itu-breadboardatau-project-board/Freeman, R. L. (2004). Telecommunication System Engineering, Fourth Edition. New Jersey: Wiley.Wijayanti, N. N. (2021, Januari 2021). Website vs Web Application : Pilih yang Mana Ya? Diambil kembali dari Niaga Hoster:https://www.niagahoster.co.id/blog/web site-vs-web-app/Switch Analog
IMPLEMENTASI ALGORITMA KONTROL PROPORTIONAL INTEGRAL (PI) DC-DC FLYBACK CONVERTER MENGGUNAKAN ARDUINO NANO UNTUK FUEL CELL Alkafi Dimitri Sukmana; Waru Djuriatno; Panca Mudjirahardjo
Jurnal Mahasiswa TEUB Vol. 11 No. 2 (2023)
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Energy plays a very important role in human life. Every year, the demand for energy needs continues to increase and the majority of energy generation uses fossil fuels. So an environmentally friendly energy source is needed. One of the environmentally friendly energy sources is fuel cells. Themain problem with fuel cells is that the output voltage is unstable and changes depending on the pressure, temperature, and use of the fuel cell's composition. So one of the electronic equipment that can increase and stabilize the output voltage in the fuel cell is needed, namely the Dc-Dc flyback converter using PI (Proportional Integral) Control. The use of a flyback converter with a designed PI control has a role to set the PWM on the flyback converter switch. In this study, the Implementation of the PI Control Algorithm on the Dc-Dc flyback converter used voltage feedback. The purpose of this study is to design and analyze the performance characteristics of the PI controller in stabilizing the output voltage of the flyback converter even though there are changes in load and input voltage. In this study, there were two tests on the design results, namely testing the response of the flyback converter on the open loop and the close loop which was given PI control with the direct synthesis method. The results showed that the flyback converter has been successfully created and is able to produce an output voltage of 2-3x from an input voltage of 24Vdc. The converter is capable of producing a voltage of 63.6 Vdc with a duty cycle of 50% with an efficiency of 83.57%. From the close loop test, there will be variations in input voltage and load, the flyback converter output voltage can be kept constant at 72 volts with steady state error and relatively small settling time values. Sothe performance of the PI controller with Dc-Dc flyback converter in regulating the dc-dc output voltage of the flyback conveterter can respond to changes in input voltage, load, and setpoint stably and effectively. DAFTAR PUSTAKA[1] International Energy Agency (IEA), “International Energy Agency (IEA)- Report,” 2018.[2] Idham F, Halimi S, dan Latifah S. 2009. Alternatif Baru Sumber Pembangkit Listrik dengan Menggunakan Sedimen Laut Tropika Melalui Teknologi Microbial Fuel Cell. Teknologi Hasil Perikanan Institut Pertanian Bogor.[3] I. A. Safitri dkk., “UJI KINERJA SMART GRID FUEL CELL TIPE PROTON EXCHANGE MEMBRANE (PEM) DENGAN PENAMBAHANHIDROGEN,” 2016.[4] S. K. Rajasekaran, G. Uma, and K. Vijayakumar, "Design of Flyback Converter with PI Controller for Power Factor Correction,"International Journal of Engineering and Technology, vol. 8, no. 3, pp. 1216-1223, 2016.[5] Erni, Y. (2019). Sistem Kontrol. Bandung: Informatika.[6] Erni, Y. (2021). Sistem Kontrol Lanjut. Bandung: Informatika.[7] Ogata, K. (2010). Modern Control Engineering. New Jersey: Prentice Hall.
RANCANG BANGUN DC-DC FLYBACK KONVERTER PADA FUEL CELL MENGGUNAKAN MODE DCM (DISCONTINUOUS CONDUCTION MODE) Haidar Taqy; Waru Djuriatno; Panca Mudjirahardjo
Jurnal Mahasiswa TEUB Vol. 11 No. 2 (2023)
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Energy is one of the main sources in human daily life, the resources are divided into two part, it is renewable and non-renewable resources. In the 21st century, fuel cells has been known as a technology which can produce electrical energy and heat energy efficiently and cleanly. This fuel cell is a renewable energy category, therefore it will be environmentally friendly. Then, to support the performance of fuel cell, it requires a tool namely DC-DC converter. DC-DC converter is an electronic circuit that is used to increase or decrease the DC voltage value. There are many kind of topologies for this converter, one of them is the flyback topology. The flyback topology is a relatively simple topology than the other topologies, especially for the low power category. In this flyback converter circuit there is a transistor controlled ignition circuit, namely Pulse Width Modulation (PWM). The function of PWM is to compare the DC reference signal waveform with a triangle. There are variation of duty cycle value in the PWM control circuit which is regulated by the Arduino microcontroller. In this converter there is a transfomator to increase the DC voltage valueas it was expected. The sensors used in this flyback converter are current sensors and voltage sensors, in order to display data results accurately. Keywords : Fuel Cell, DC-DC converter, DC Voltage, Flyback, Pulse Width Modulation, Duty Cycle, Transformer, Microcontroller DAFTAR PUSTAKA[1] H. Suhada, “Fuel Cell Sebagai Penghasil Energi Abad 21,” 2001. [Online]. Available: http://puslit.petra.ac.id/journals/mechanical/92[2] “Fuel Cell Handbook (Seventh Edition),” 2004.[3] G. C. Nugroho, T. Andromeda, and Y. Christyono, “PERANCANGAN KONVERTER ARUS SEARAH TIPE FLYBACK SEBAGAI CATUDAYA RANGKAIAN DRIVER DAN MICROCONTROLLER PADA KONVERTER TIPE ZETA,” TRANSIENT, vol. 7, no. 4, p. 897, May 2019, doi:10.14710/transient.7.4.897-903.[4] S. S. Deswal, “Application of Boost Converter for Ride-through Capability of Adjustable Speed Drives during Sag and SwellConditions Biological evaluation of Lagenaria siceraria View project Antiulcer Product Standardization View project.” [Online]. Available: https://www.researchgate.net/publication/242582788[5] B. Rudiyanto, A. Susanto, and Y. Susmiati, “Aplikasi Kontrol PI (Proportional Integral) pada Katup Ekspansi Mesin Pendingin,” 2016. [Online]. Available: http://www.jurnal.unsyiah.ac.id/RTP[6] A. A. Kurniawan, B. Fatkhurrozi, and R. A. Wibowo, “DESAIN FLYBACK CONVERTER MENGGUNAKAN KLEM AKTIF UNTUK SISTEMPHOTOVOLTAIC 500W,” Theta Omega: Journal of Electrical Engineering.[7] S. Noor and N. Saputera, “EFISIENSI PEMAKAIAN DAYA LISTRIK MENGGUNAKAN KAPASITOR BANK,” 2014.
RANCANG BANGUN DC-DC FLYBACK CONVERTER DENGAN MODE CCM (CONTINUOUS CONDUCTION MODE) UNTUK APLIKASI FUEL CELL Ahmad Syafiq Kanzul Fikri; Waru Djuriatno; Panca Mudjirahardjo
Jurnal Mahasiswa TEUB Vol. 11 No. 3 (2023)
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Advances in technology and science are rapidly increasing the need for energy. In an effort to meet the increasing demand for energy, a qualified energy source is needed. The biggest source of energy today still comes from fossil fuels which must be reduced dependency to reduce global warming and prevent energy crises in the future. Therefore, a clean and renewable alternative energy source is needed which has great potential to be developed such as fuel cells. As an alternative energy, fuel cells still have problems with their low output DC voltage, so to support fuel cell performance a power electronics device is needed. The flyback topology is a relatively simple power electronics topology compared to other topologies for the low to medium power category. The advantage of the flyback topology is its ability to provide isolation between the input and load sections, with the presence of a transformer (coupled inductor) between the input and output sections. One of the operating modes of the flyback converter is the CCM (Continuous Conduction Mode) operation mode which has the advantage of having a smaller primary current value thereby reducing the conduction losses and switching losses of the flyback converter. This research was carried out by simulating and designing a flyback converter in CCM mode to increase the fuel cell voltage from 24 V to 72 V. In testing the DC-DC flyback converter close loop CCM mode using PI (Proportional Integral) control it has been able to increase the voltage from 24 V to 72 V constantly with an average power efficiency above 80%. The device also always works in CCM mode as indicated by the transformer primary current (Ip) waveform or MOSFET drain-source current (IDS) waveform which is in the shape of a trapezoid. Keywords: Fuel Cell, DC-DC Flyback Converter, Continuous Conduction Mode, Transformator, Coupled inductor, Proportional Integral, Close Loop