Garuda - Garba Rujukan Digital

RANCANG BANGUN SISTEM ELEKTROPORATOR UNTUK ALAT PASTEURISASI SUSU MENGGUNAKAN PULSED ELECTRIC FIELD Zuhal Azmiy Dwi Rachman; Ponco Siwindarto; n/a Wijono
Jurnal Mahasiswa TEUB Vol. 10 No. 4 (2022)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Milk is a highly nutritious food ingredient because fresh milk contains a variety of complete and balanced food substances such as protein, fat, carbohydrates, minerals, and vitamins. Dairy products that have high nutritional value can easily become a place for the development of microorganisms. Microorganisms that breed in milk can cause changes in the color, aroma, and taste of the milk, eventually spoiling the milk. Pasteurization of milk used in the dairy industry uses the LTST (Low Temperature Long Time) and HTST (High Temperature Short Time) methods. Pasteurization by heating milk can reduce the nutritional content of milk. Pulse Electric Field (PEF) is a non-thermal food processing method that provides electric shocks in the form of high-voltage pulses to foodstuffs for a certain time at room temperature. In this study, the design of an electroporator system for milk pasteurization using PEF was carried out. The results of the pasteurization process using an electroporator are considered to be able to reduce the amount of bacteria contained in milk. The highest field strength produced by this tool is able to touch the figure of 32 kV/cm with a maximum voltage of 48 kV. By setting the pump motor duty cycle of 14% and the pasteurization time of 3 minutes, the milk condition has a longer shelf life than unpasteurized fresh milk. These results are evidenced by the methylene blue reductase test in milk, where 100 ml of milk is homogenized with 1 ml of methylene blue and then waited until the milk turns white. Keywords: Milk, Pasteurization, PEF, Duty Cycle, Methylene Blue, Reductase

KARAKTERISTIK KECEPATAN DAN ARUS MOTOR DC TERHADAP VARIASI TORSI PADA SISTEM PASTEURISASI SUSU Aldian Ferdiansyah Mahendra; Ponco Siwindarto; n/a Wijono
Jurnal Mahasiswa TEUB Vol. 10 No. 5 (2022)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Continuous pasteurization system is a pasteurization system where the material goes to the pasteurization site and is pasteurized in a short time. Continuous pasteurization is widely used in industrial scale. In a continuous pasteurization system, a motor and pump system is needed to move milk from one process to another. One type of motor that can be used as a pump is a separate-excited DC motor. DC motors can provide large torque and are easy to control so that DC motors are often found in various applications such as pumps, conveyors, and others. In this study, a simulation will be carried out using MATLAB/SIMULINK r2017a to determine the characteristics of the separately-excited DC motor when given a change in the duty cycle of the armature voltage to the rotor speed and the armature current when given load torque variation and nominal load torque. It was found that at zero load and nominal load torque, speed of the motor is directly proportional to the increase in the duty cycle of the armature voltage. Meanwhile, when the motor is given a nominal torque load so that it rotates at the nominal speed and then the load is increased until it reaches 5 times th

ANALISIS KUAT MEDAN ELEKTRODA DENGAN VARIASI DUTY CYCLE PADA ALAT PASTEURISASI SUSU Ihsan Ahmad Badrianto; Ponco Siwindarto; n/a Wijono
Jurnal Mahasiswa TEUB Vol. 10 No. 5 (2022)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Medan listrik merupakan suatu daerah di sekitar muatan yang dipengaruhi oleh gaya listrik. Tingkat keseragaman medan tidak terlepas dari karakteristik geometris pada elektroda dan jarak sela antara kedua elektroda. Semakin elektroda simeteris memiliki tingkat keseragaman lebih tinggi daripada elektroda asimetris. Pada penelitian ini dilakukan proses simulasi kuat medan pada elektroda pelat sejajar menggunakan perangkat lunak FEMM 4.2. Elektroda pelat sejajar mempunyai tingkat keseragaman tinggi daripada bentuk elektroda lain. Masukan tegangan pada perangkat lunak FEMM 4.2. diperoleh dari hasil pengukuran tegangan tinggi. Pengukuran tegangan tinggi dilakukan pada alat pasteurisasi susu dengan variasi duty cycle 10% sampai dengan 70% dengan kenaikan 10% dan dihasilkan grafik tegangan tinggi pada masing-masing duty cycle. Tegangan tinggi hasil pengukuran dimasukkan pada simulasi sehingga diperoleh data distribusi medan. Kuat medan yang dihasilkan berkisar dari 3,4 kV/cm s.d. 32,5 kV/cm. Intensitas medan tersebut berhasil untuk mengurangi jumlah mikroba yang terkandung dalam susu.Kata Kunci: Elektroda, Medan Listrik, Duty Cycle, Tegangan Tinggi, FEMM.

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)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

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 MODIFIKASI TRANSFORMATOR PADA ISOLATED DC-DC BOOST CONVERTER DENGAN TOPOLOGI FULL BRIDGE MENGGUNAKAN APLIKASI FEMM Vinsensius Anggara Paramayuda; n/a Wijono; Waru Djuriatno
Jurnal Mahasiswa TEUB Vol. 11 No. 6 (2023)
Publisher : Jurnal Mahasiswa TEUB

Show Abstract | Download Original | Original Source | Check in Google Scholar

DC-DC converters are an important component in modern 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. By using an isolated DC-DC full bridge converter, a transformer is needed as a separator between the input and output parts as well as a voltage booster in the boost converter. However, when the primary current flowing is high, the ferrite core of the transformer is easier to saturate, so in this study the authors designed a transformer modification by dividing the transformer into two (split). In addition to reducing the risk of saturation due to current, with the split transformer, it also reduces the vertical dimensions of the transformer (more flat), so that heat dissipation is also getting better. With the two transformers divided, the two transformers are paralleled on the primary side and serialized on the secondary side, this causes the difference in current ratio in the transformer before and after the split. Before the split, the winding ratio was 3:10 while after the split it became 3:5. From simulations and calculations performed on FEMM and Octave, on the secondary AWG 24, the comparison of the simulated primary current with the AWG maximum current in the maximum winding before the split is 0.47%, while in the transformer after the split is 0.2%, on the secondary AWG 22, before the split is 0.9% and after the split is 0.59%, on the secondary AWG 20, before the split is 1.78% and after the split is 0.7%. For the resulting primary copper loss, it shows that the transformer after the split shows a smaller copper loss. For core loss in one transformer before the split is lower with an average of 15 Watts, while core loss in two transformers after the split is greater with an average of 28 Watts. Keywords: Transformer, split, current ratio, copper loss, core loss.

Title

Found 5 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 5 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 5 Documents
Search