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Waru Djuriatno
Departemen Teknik Elektro, Universitas Brawijaya
Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering

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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
PENGARUH PENGENDALIAN KOMUTASI HALL SENSOR TERHADAP KECEPATAN MOTOR BLDC Batara Helda Firdauzy; Waru Djuriatno; Muhammad Aswin
Jurnal Mahasiswa TEUB Vol. 11 No. 3 (2023)
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A brushless DC motor, also known as a brushless DC motor (BLDC motor), is a type of synchronous motor. The BLDC motor used has advantages over ordinary DC motors, including not causing a brush, higher efficiency, almost no sound, long life, and other advantages. The purpose of this study was to determine the speed of the BLDC motor in steady state when the hall sensor wasdelayed and the torque load changed and to determine the settling time of the BLDC motor speed when the hall sensor was delayed and the torque load was changed. This control uses a delay that is installed on the hall sensor before entering the controller. This system is made with the simulation method on the PSIM application. Tests carried out using delay changes at values of 0 seconds, 0.002 seconds, 0.004 seconds, 0.006 seconds, 0.008 seconds and 0.01 seconds. Tests were also carried outusing changes in torque load on BLDC motors with values of 1 Nm, 2 Nm, 4 Nm, and 8 Nm. Based on the results of testing the change in delay and torque load on the BLDC motor, the delay value at the hall sensor commutation and the torque load value is inversely proportional to the BLDC motor speed and the settling time at BLDC motor speed is directly proportional to the torque load value on the BLDC motor and inversely proportional to the delay on hall sensor commutation in delay conditions 0.008 seconds and 0.01 seconds. Keywords-- BLDC Motor, hall sensor commutation control, delay, settling time. DAFTAR PUSTAKA[1] Kandiban, R., & Arulmozhiyal, R. (2012). Speed control of BLDC motor using adaptive fuzzy PID controller. In Procedia Engineering (Vol. 38, pp. 306–313). Elsevier Ltd. https://doi.org/10.1016/j.proeng.2012.06.039[2] Anugrah, R. F. (2020). Kontrol Kecepatan Motor Brushless DC Menggunakan Six Step Comutation Dengan Kontrol PID (Propotional Integral Derivative ). Jurnal Teknik Elektro Dan Komputer TRIAC, 7(2), 57–63.[3] Zhao, J., & Yangwei, Y. (2011). Brushless DC Motor Fundamentals Application Note. MPS, The Future of Analog IC Technology, (July 2011), 7–8.[4] Asuri, S. K. (2021). Modelling and Control of Sparse Converter Fed Induction Motor Drives, 58–80. Retrieved from https://www.tntech.edu/files/cesr/StudThesis/asuri/Chapter4.pdf[5] Wicaksono, A. S. (2016). Perancangan dan Implementasi Sistem Pengaturan Kecepatan Motor BLDC Menggunakan Kontroler PI Berbasiskan Neural-Fuzzy Hibrida Adaptif. Jurnal Teknik ITS, 5(2), 68–74. https://doi.org/10.12962/j23373539.v5i2.16272[6] Qudsi, O. A., Prasetyono, E., Ferdiansyah, I., Nugraha, S. D., & Purwanto, E. (2020). Soft Starting dengan Redaman Arus Starting Pada Motor BLDC, 2(September), 11.[7] Akbar, D., & Riyadi, S. (2019). Pengaturan Kecepatan Pada Motor Brushless Dc (Bldc) Menggunakan Pwm (Pulse Width Modulation), 255–262. https://doi.org/10.5614/sniko.2018.30[8] Kosanke, R. M. (2019). Performansi Sistem Pengendali Kecepatan Motor BLDC Menggunakan Logika Fuzzy Logic[9] Irawan, D., & Perdana SS, P. (2020). Kontrol Motor Brushless DC (BLDC) Berbasis Algoritma AI - PID. Jurnal Teknik Elektro Dan Komputasi (ELKOM), 2(1), 41–48. https://doi.org/10.32528/elkom.v2i1.3146 [10]Atmel. (2014). AVR1607 : Brushless DC Motor ( BLDC ) Control in Sensor, 1–18.[11]Yedamale, P. (2003). Brushless DC (BLDC) Motor Fundamentals, 1–20.[12]Brown, W. (2011). AN857 Brushless DC Motor Control Made Easy App. Note. Technology, 1–48.[13]Current, B. D., Motor, B., Software, C., & Xmc, I. (n.d.). BLDC motor control software using XMC. Retrieved from www.infineon.com
PENGARUH PENURUNAN TEGANGAN BATERAI TERHADAP EFISIENSI KOMPONEN SWITCHING PADA PENERAPAN APLIKASI BLDC MOTOR CONTROLLER Audrey Devi Anggraeni; Waru Djuriatno; Muhammad Aswin
Jurnal Mahasiswa TEUB Vol. 11 No. 3 (2023)
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3-Phase Inverter is a type of electronic device that converts a DC voltage source into a 3-Phase AC voltage source, which there are 6 switching components works alternately are used as input power in the operation of a BLDC Motor. MOSFET is a type of switching components that is usually used because it has high efficiency at low voltage levels and has advantages at high switching speeds. The purpose of this study is to design and simulate a system to determine the effect of a decrease in battery voltage on the resulting losses which affect the efficiency of the switching in the speed control applications of BLDC Motor Controller. The test was carried out by simulating a circuit to control the speed of BLDC Motor in one battery discharge cycle using the MATLAB Simulink application. In this test, the State of Chargae (SoC) is recorded, the voltage and current are generated by the battery, the VDS and IDS flowing through the MOSFET, also the results of PIN and POUT. Recording is done in a range of SoC values of 100%, 80%, 60%, 40%, and 20%. Speed control on BLDC Motors is designed using a controller that has feedback with a setpoint of 200 RPM. Based on the results of the testing the voltage drop due to power consumption in the operation of the BLDC Motor, obtained an increase in losses in the switching components. So that the voltage drop is inversely proportional to the losses of the switching components, and the greater the power dissipation generated, the efficiency of the switching components will decrease. Index terms : MOSFET, SoC, Power Dissipation, Efficiency, BLDC Motor
SIMULASI KINERJA RANGKAIAN POWER DECOUPLING TIPE BUCK-BOOST UNTUK MEMPERKECIL DIMENSI KAPASITOR DC LINK DALAM SISTEM PROPULSI KERETA API Hansel Daerendra Mahardhika Elsam; Waru Djuriatno; Rini Nur Hasanah
Jurnal Mahasiswa TEUB Vol. 11 No. 3 (2023)
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This research explains the rectifier system in a train propulsion system that uses a capacitor as a filter (referred to as a DC link capacitor), which generally has a large capacitance and requires the addition of a power decoupling circuit to assist the capacitor in energy storage. The power decoupling circuit is connected in parallel between the rectifier system and the load side, and the topology used is a buck-boost type. The circuit consists of several components such as capacitors, inductors, and switch components (MOSFETs). The objective of this research is to obtain a small capacitance value for the DC link capacitor by using a power decoupling circuit. Testing is carried out using Simulink software in MATLAB as a simulation tool to control the power decoupling circuit and enable energy storage. In this research, testing is also conducted on the rectifier system without using the power decoupling circuit to determine the comparison of capacitor capacitance values used between the two systems. The results obtained in this study are as follows: for the system without using a power decoupling circuit, it requires a DC link capacitor of 70 µF. On the other hand, the system that uses a power decoupling circuit requires a DC link capacitor of 2 µF, with the same resistive load of 100 Ω. This is achieved by adding a decoupling capacitor of 10 µF and a decoupling inductor of 1mH in the power decoupling circuit. Keywords: Performance, Buck-Boost Power Decoupling, Capacitor, Propulsion System.
SINKRONISASI SWITCHING DAN PENGATURAN DUTY CYCLE PADA DUA INVERTER MOTOR BLDC DENGAN SUMBER TEGANGAN JAMAK Afiyah Mahirah Rahman; Waru Djuriatno; Muhammad Aswin
Jurnal Mahasiswa TEUB Vol. 11 No. 3 (2023)
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Current technological developments continue to increase in various fields, especially in the field of transportation. The emergence of electric vehicles is the most highlighted today. Electric vehicles are vehicles sourced from electric power that are supplied into the main system as motor drives, one of which is the BLDC Motor. One of the most important things on this system is the voltage source. One of the widely used and developed voltage sources is lithium-ion batteries. However, the use of a single voltage source has several disadvantages, one of which is charging the battery too long, causing too frequent charging and resulting in reduced capability on the battery. The use of multiple voltage sources was chosen in order to reduce the intensity of charging too often. To regulate the use of both voltage sources alternately when the motor is working, two inverters are used to regulate the change of the voltage source. Control of both inverters is regulated by the commutation logic of both inverters and control through the duty cycle on each inverter with different values in the range of State of Charge values of the predetermined battery 1. This research was conducted by simulation using Simulink software which is useful for running simulations in real time and knowing the success of changing voltage sources in the system. Based on simulations, the replacement of the voltage source can be done under the condition that the system is still working and the two inverters are able to work alternately. The test was conducted when battery SoC 1 was at a value of 50% with a duty cycle value of 0.6 for each system. Kata Kunci — Motor BLDC, Sumber Tegangan Jamak, Half Bridge Inverter 3 Fasa, Penggunaan Dua Inverter.
ANALISIS SWITCH MULTIPLEXING POWER DECOUPLING DENGAN PWM RECTIFIER DALAM MEREDUKSI DIMENSI KAPASITOR DC-LINK PADA PENGGERAK TRAKSI KERETA API LISTRIK Farhan Afif Hanip; Waru Djuriatno; Tri Nurwati
Jurnal Mahasiswa TEUB Vol. 11 No. 4 (2023)
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Dampak dari perkembangan teknologi salah satunya adalah semakin mudahnya mobilisasi yang terjadi pada saat ini. Manusia dengan mudahnya menjangkau beberapa titik di dunia ini dengan teknologi saat ini. Salah satu yang menguatkan kondisi tersebut adalah keberadaan kereta api listrik. Daya listrik yang dibutuhkan Kereta Rel Listrik (KRL) ini akan disuplai dari sebuah gardu traksi menggunakan kawat konduktor yang membentang di bagian atas sepanjang rute KRL tersebut yang disebut dengan sistem catenary atau Listrik Aliran Atas (LAA). Rectifier yang ada pada kereta listrik akan merubah tegangan AC menjadi DC yang tentunya akan dipengaruhi oleh penggunaan kapasitor sebagai penyimpan energi. Kapasitor pun menjadi salah satu hal yang seharusnya diperhatikan. Jika kapasitas yang diperlukan besar untuk mengatasi tentunya akan berakibat ke dimensi kapasitor itu sendiri. Apalagi kapasitor dengan kapasitas yang besar sangat terbatas jenisnya. Maka dari itu penggunaan prinsip power decoupling digunakan. Dengan mengkombinasikan power decoupling dan PWM Rectifier mampu memperoleh kapasitor yang lebih kecil sekitar 10 kali lipat dari kebutuhan seharusnya tanpa mengurangi keefektifannya dalam mengatasi ripple yang dihasilkan yaitu 10%. Penggunaan komponen switching yang berfungsi ganda pada rectifier dan power decoupling diajukan sehingga penggunaan switching tambahan bisa diminimalisir. Pengontrolan tertentu diperlukan untuk kerja switchmultiplexing power decoupling dengan PWM Rectifier. Kata kunci— Kereta Rel Listrik, PWM Rectifier, Switchmultiplexing Power Decoupling, Ripple, Kapasitor
ANALISIS PENGARUH PENINGKATAN PASOKAN OKSIGEN PADA OPEN CATHODE PEMFC (PROTON EXCHANGE MEMBRANE FUEL CELL) DENGAN MENINGKATKAN KADAR OKSIGEN UNTUK MENCAPAI UNJUK KERJA FUEL CELL YANG OPTIMAL Patrick Commanevendi; Waru Djuriatno; Eka Maulana
Jurnal Mahasiswa TEUB Vol. 11 No. 4 (2023)
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The performance of PEMFC is highly dependent on the level of oxygen supply to the cathode. The diffusion rate of oxygen through the cathode catalyst layer is influenced by factors such as the thickness and porosity of the layer, the oxygen concentration in the gas flow, as well as the temperature and pressure of the fuel cell. The level and quality of oxygen supply to the cathode play a crucial role in the fuel cell's performance. This research will discuss the analysis of the influence of increasing oxygen supply by increasing the oxygen content to the cathode and examine its effects on the performance of the Open Cathode PEMFC. This study utilizes a specialized system to support the measurement and reading of oxygen content values in the air using an oxygen sensor, as well as automation using a solenoid valve from a pure oxygen gas cylinder to achieve optimal oxygen content for the performance of the Open Cathode PEMFC. The research will be conducted by performing several experiments to increase the oxygen content in the vicinity of the fuel cell, which has been provided with a box-shaped space with a constant flow of hydrogen gas pressure into the fuel cell. Then, a hose will fill the space with pure oxygen gas mixed with ambient air from an air compressor to obtain the desired oxygen content value. The pressure of the oxygen gas and ambient air from this compressor is controlled by a solenoid valve. Subsequently, the voltage, current, and power output of the fuel cell will be measured from several experiments of increased oxygen content, which will be read using an oxygen sensor.
ANALISIS PENGARUH EXTERNAL HUMIDIFIER TERHADAP KINERJA OPEN CATHODE PROTON EXCHANGE MEMBRANE FUEL CELL Adrio Irfan Fauzi; Waru Djuriatno; Eka Maulana
Jurnal Mahasiswa TEUB Vol. 11 No. 4 (2023)
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Fuel cell is one of the environmentally friendly renewable energy generators. The fuel cell requires oxygen and hydrogen which act in the membrane so that it can generate electricity. The results of the reaction that occurs in the fuel cell are electricity, heat and water so that it is more environmentally friendly. However, as a generator of renewable electrical energy, fuel cells have several drawbacks, including the need for balanced oxygen and hydrogen pressure, proper working temperature and proper humidity in order to maintain the performance of the fuel cell itself. This fuel cell stack requires optimal humidity in order to maintain the performance of the fuel cell itself. An external humidifier is one of the solutions to keep fuel cell moisture in order to make its performance more efficient. In this study, a humidifier system is applied which utilizes vibrations from an ultrasonic humidifier to convert water into a gas phase and a fan as a medium for transporting water vapor to the fuel cell. Water in the gas phase will mix with the surrounding air which will be absorbed by the open cathode fuel cell. In this system, DHT 22 functions as a moisture detector around the fuel cell as feedback so that the controller can maintain the ambient humidity value.
DESAIN DAN IMPLEMENTASI RANGKAIAN RCD SNUBBER PADA DC-DC FULL BRIDGE CONVERTER Dhika Abiyoso Rahardianto; Waru Djuriatno; Rini Nur Hasanah
Jurnal Mahasiswa TEUB Vol. 11 No. 4 (2023)
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DC-DC Converter is an important component in modern electric power systems. This converter is used to convert DC voltage from one level to another, which is indispensable in various types of applications ranging from everyday electronic equipment to industrial use. DC-DC full bridge converter is one of the commonly used power converter topologies. However, these converters often face challenges in the form of voltage spikes that can damage components and oscillations that interfere with system performance. In this study the authors designed a RCD snubber circuit that could overcome this problem. The RCD snubber circuit consists of resistors, capacitors and diodes which are connected in parallel to each MOSFET. The test results show that before the snubber circuit is installed, there is a voltage spike that reaches 2 times the input voltage to more. In addition, high-frequency oscillations occur which require 1µs and 4µs to reach steady state. After adding the RCD snubber circuit, retesting was carried out and it was found that the voltage surge had reduced to about 1.2 times the input voltage. In addition, the oscillations that occur also require faster time to reach steady state, which is only 0.4µs and 1.5µs. Based on the test results and calculations, the power dissipation on the snubber resistor is also obtained. At an input voltage of 12V, the power dissipation is 2,234% input power, then at an input voltage of 24V, the power dissipation is 2,273% input power and at an input voltage of 36V, the power dissipation is 1,983% input power. From all the test results show that the RCD snubber circuit is able to reduce the voltage spikes and also the oscillations that occur at the moment of transition. Keywords: DC-DC full bridge converter, snubber, spike, oscillation, transition, dissipation
PEMODELAN SLIDING MODE CONTROL UNTUK REGULASI TEGANGAN KELUARAN DC-DC ISOLATED FULL BRIDGE CONVERTER Muhammad Akbar Amran; Mochammad Rusli; Waru Djuriatno
Jurnal Mahasiswa TEUB Vol. 11 No. 4 (2023)
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Technological developments in electronic components and circuits are capable of producing a direct current (DC) power supply system, which is produced by converting the input DC voltage to a higher or lower output DC voltage. To enhance energy conversion efficiency, precise and responsive control is essential. One widely used approach is to employ a DC-DC full bridge converter topology. The objective of this study is to model a Sliding Mode Control (SMC) to regulated the output voltage of a DC-DC full bridge converter. The research involves designing and simulating the converter circuit subsystem, controller design, and specifying the equipment to closely resemble the in real conditions. Through experimentations, it is observed that the designed controller meets the expected specifications allowing the converter to simulate stable output voltage regulation. The SMC methods is chosen for its adaptive and nonlinear nature, enabling it to produce a constant output voltage even when the input voltage from the DC source varies. The input DC voltage specification is 24 V, while the output voltage generates 48 V. MATLAB/Simulink is employed for simulation to design the entire system and present the research result in graphical form. Keyword: Fuel Cell, DC-DC Full Bridge Converter, Sliding Mode Control, Voltage Regulation.
Co-Authors Adharul Muttaqin Adrio Irfan Fauzi Afiyah Mahirah Rahman Ahmad Syafiq Kanzul Fikri Alfian Fitrayansyah Alkafi Dimitri Sukmana Audrey Devi Anggraeni Ayatullah Farhan Batara Helda Firdauzy Bernardino Yudika Soesanto Bob Alvin Sidabutar Dhika Abiyoso Rahardianto Eka Maulana Farhan Afif Hanip Hafidh Hidayat Haidar Taqy Hansel Daerendra Mahardhika Elsam Mudjirahardjo, Panca Muhammad Akbar Amran Muhammad Alman Wadi Muhammad Aswin Muhammad Faqih Alfalah Muhammad Nurhilal Hamdi Muhammad Rifqi Nur Sabilillah n/a Wijono Patrick Commanevendi Raden Arief Setyawan Rahmadwati, n/a Rakha Ghilman Fakhruddin Yusuf Rini Nur Hasanah Rini Nur Hasanah Rusli, Mochammad Shafina Rifdhayanti Zein Taqiy Asyam Listyawan Teofilus R.M. Silalahi teub elektro teub Tri Nurwati Vinsensius Anggara Paramayuda Wijono