scholarly journals Rancang Bangun DC Chopper Satu Kuadran Berbasis Simulink Matlab

2021 ◽  
Vol 2 (2) ◽  
pp. 175-181
Author(s):  
Azar Ihsan ◽  
Muldi Yuhendri
Keyword(s):  
Load Resistor

Catu daya DC merupakan serangkaian komponen elektronik yang dapat menyuplai tegangan DC ke komponen elektronik lainnya. Setiap perangkat elektronik membutuhkan tegangan suplay yang berbeda-beda. Karena penggunaan catu daya yang luas ini, diperlukan suatu sistem yang dapat mengkonversikan tegangan DC dari suatu tingkat tegangan ketingkat tegangan lainnya. Maka salah satu cara untuk mengubah tegangan DC ketegangan DC lainnya digunakan sistem yang dikenal sebagai DC choper. Pada Sistem DC choper satu kuadran nilai rata-rata tegangan keluaran dan arusnya selalu positif dan dayanya selalu mengalir dari sumber ke beban. Paper ini mengusulkan DC chopper satu kuadran berbasis kontroller proportional (P). Sistem kendali diimplementasikan dengan menggunakan mikrokontroller arduino mega 2560 yang diprogram dengan simulink matlab. Peralatan sistem kendali dilengkapi dengan potensiometer sebagai penurunan tegangan input 200 VDC menjadi tegangan yang bervariasi sesuai dengan yang diinginkan yang diinginkan agar tegangan keluaran tetap stabil. Tegangan 200 VDC yang termasuk tegangan tinggi maka dibutuhkan IGBT untuk membuat arus yang lebih besar dan beroperasi dalam tegangan tinggi karena memiliki efesiensi yang lebih baik. Untuk mendeteksi tegangan tersebut dibutuhkan sensor tegangan yang terdiri dua buah resistor yang bernilai 330K dan 6,3K dan sensor arus yang digunakan unyuk mendeteksi arus, sensor arus yang digunakan sensor arus ACS712. Sistem DC choper satu kuadran diverifikasikan melalui percobaan di laboratorium dengan beban load resistor. Hasil pengujian menunjukkan bahwaDC chopper satu kuadran berbasis kontroller proportional yang diusulkan dalam paper ini telah bekerja dengan baik. Hal ini dapat dilihat dari tegangan output yang dihasilkan sesuai dengan tegangan yang diinginkan yang atur melalui pontesiometer.

Soft-error-immune switched-load-resistor memory cell

1988 ◽  
Vol 35 (12) ◽  
pp. 2094-2100 ◽  
Author(s):  
N. Homma ◽  
T. Nakamura ◽  
T. Hayashida ◽  
M. Matsumoto ◽  
K. Nakazato ◽  
...  
Keyword(s):  
Memory Cell ◽  
Soft Error ◽  
Load Resistor

scholarly journals KAJIAN RELIABILITAS PADA SISTEM SERI-PARALEL DENGAN EMPAT KOMPONEN

2018 ◽  
Vol 7 (1) ◽  
pp. 73-83
Author(s):  
Farhah Izzatul Jannah ◽  
Sudarno Sudarno ◽  
Alan Prahutama
Keyword(s):  
Weibull Distribution ◽  
System Reliability ◽  
Failure Time ◽  
Likelihood Estimation ◽  
Parallel System ◽  
Operating Conditions ◽  
Failure Time Data ◽  
Time Data ◽  
Rank Regression ◽  
Load Resistor

Reliability analysis is the analysis of the possibility that the product or service will function properly for a certain period of time under operating conditions without failure. One configuration of components that can be formed is a series-parallel system on a filter capacitor circuit using 4 components consisting of 2 rectifier diodes, 1 capacitor, and 1 load resistor. The data used to obtain the value of system reliability is the time of failure based on the assumption of failure of the independent component. The function of the form on the system can be expressed by Ф(x)= x1x3 + x1x4 + x2x3 + x2x4 - x1x3x4 - x2x3x4 - x1x2x3 - x1x2x4 + x1x2x3x4. The parameter values of each distribution are calculated using the Median Rank Regression Estimation (MRRE) and Maximum Likelihood Estimation (MLE) methods. To test the data following a certain distribution or not, the calculation is manually done with the Anderson-Darling (AD) test so that it is known that the failure time data of rectifier diode 1 follows the weibull distribution with parameters  and , failure time data of rectifier diode 2 follows weibull distribution with parameters  and , failure time data of capacitors follow normal distribution with parameters  and , and the failure time data of the load resistor following the gamma distribution with parameters  and . From the calculation of system reliability, it shows that the higher the intensity of the system fails it will affect the value of reliability to be lower. A serial system from a parallel system functions if there is at least one component j in one subsystem that functions. Keywords: Reliability, Series-Parallel, MRRE, MLE, AD.

Effect of Electromechanical Coupling on Locally Resonant Metastructures for Simultaneous Energy Harvesting and Vibration Attenuation Applications

2020 ◽  
Author(s):  
Mohammad A. Bukhari ◽  
Feng Qian ◽  
Oumar R. Barry ◽  
Lei Zuo
Keyword(s):  
Wave Propagation ◽  
Energy Harvesting ◽  
Band Structure ◽  
Electric Power ◽  
External Load ◽  
Electromechanical Coupling ◽  
Effective Energy ◽  
Coupling Coefficients ◽  
Vibration Attenuation ◽  
Load Resistor

Abstract The study of simultaneous energy harvesting and vibration attenuation has recently been the focus in many acoustic meta-materials investigations. The studies have reported the possibility of harvesting electric power using electromechanical coupling; however, the effect of the electromechanical resonator on the obtained bandgap’s boundaries has not been explored yet. In this paper, we investigate metamaterial coupled to electromechanical resonators to demonstrate the effect of electromechanical coupling on the wave propagation analytically and experimentally. The electromechanical resonator is shunted to an external load resistor to harvest energy. We derive the analytical dispersion curve of the system and show the band structure for different load resistors and electromechanical coupling coefficients. To verify the analytical dispersion relations, we also simulate the system numerically. Furthermore, experiment is carried out to validate the analytical observations. The obtained observations can guide designers in selecting electromechanical resonator parameters for effective energy harvesting from meta-materials.

Method for Determination of Operating Temperature of Building Photovoltaic Module

2013 ◽  
Vol 591 ◽  
pp. 334-337
Author(s):  
Chen Guang Wei ◽  
Yi Wang Bao ◽  
Xiao Ying Deng ◽  
Liang Jiang
Keyword(s):  
Operating Temperature ◽  
Test Methods ◽  
National Standard ◽  
Photovoltaic Module ◽  
Operation Condition ◽  
Testing Method ◽  
Optimal Load ◽  
Building Integrated Photovoltaic ◽  
Load Resistor

There is no national standard and international standard about nominal module operating temperature (NMOT) test methods for Building Integrated Photovoltaic (BIPV) modules. An in-lab testing method for measuring NMOT of BIPV modules is proposed. Based on the real operation condition of solar cell, the effect of ambient temperature, wind speed and optimal load resistor to operating temperature were analyzed. The surface temperature, interior temperature and back temperature of BIPV module were measured and the NMOT was determined.

Substantial Reduction of Reset Current in CoO RRAM with Ta Bottom Electrode

2008 ◽  
Vol 1071 ◽  
Author(s):  
Hisashi Shima ◽  
Fumiyoshi Takano ◽  
Yukio Tamai ◽  
Hidenobu Muramatsu ◽  
Hiroyuki Akinaga ◽  
...  
Keyword(s):  
Voltage Pulse ◽  
Pulse Width ◽  
High Speed ◽  
Bottom Electrode ◽  
Substantial Reduction ◽  
Resistance Switching ◽  
Forming Process ◽  
Height Dependence ◽  
Load Resistor ◽  
Resistance Component

AbstractThe resistance switching in Pt/Co-O/Pt and Ta/Co-O/Pt has been investigated. Compared to Pt/Co-O/Pt, the reset current was more efficiently decreased in Ta/Co-O/Pt by using the load resistor in the forming process, indicating that the embedded resistance component with little parasitic capacitance effectively limits the current in the forming process. The reset process with the reset current lower than 0.15 mA was successfully demonstrated in Ta/Co-O/Pt. In addition, the high speed resistance switching by the voltage pulse with the pulse width of 20 ns was carried out, by investigating the pulse voltage height dependence of reset speed in Ta/Co-O/Pt.

Autoregressive-Model-Based Fluorescence-Lifetime Measurements by Phase-Modulation Fluorometry Using a Pulsed-Excitation Light Source and a High-Gain Photomultiplier Tube

2009 ◽  
Vol 63 (11) ◽  
pp. 1256-1261 ◽  
Author(s):  
Tetsuo Iwata ◽  
Ritsuki Ito ◽  
Yasuhiro Mizutani ◽  
Tsutomu Araki
Keyword(s):  
Light Source ◽  
Phase Modulation ◽  
High Gain ◽  
Ar Model ◽  
Fluorescence Lifetimes ◽  
Excitation Light ◽  
Pulsed Excitation ◽  
Model Based ◽  
Analysis Technique ◽  
Load Resistor

We propose a novel method for measuring fluorescence lifetimes by use of a pulsed-excitation light source and an ordinary or a high-gain photomultiplier tube (PMT) with a high-load resistor. In order to obtain the values of fluorescence lifetimes, we adopt a normal data-processing procedure used in phase-modulation fluorometry. We apply an autoregressive (AR)-model-based data-analysis technique to fluorescence- and reference-response time-series data obtained from the PMT in order to derive plural values of phase differences at a repetition frequency of the pulsed-excitation light source and its harmonic ones. The connection of the high-load resistor enhances sensitivity in signal detection in a certain condition. Introduction of the AR-model-based data-analysis technique improves precision in estimating the values of fluorescence lifetimes. Depending on the value of the load resistor and that of the repetition frequency, plural values of fluorescence lifetimes are obtained at one time by utilizing the phase information of harmonic frequencies. Because the proposed measurement system is simple to construct, it might be effective when we need to know approximate values of fluorescence lifetimes readily, such as in the field of biochemistry for a screening purpose.

Four Bit Priority Resolution Network Using Current Mode Winner Take all Circuit

2014 ◽  
Vol 889-890 ◽  
pp. 886-889
Author(s):  
Wen Qin Cao ◽  
Hai Yan Zhu ◽  
Guo Ping Tu
Keyword(s):  
Current Mode ◽  
Cmos Process ◽  
Process Technology ◽  
Output Stage ◽  
New Approach ◽  
Input Stage ◽  
Load Resistor ◽  
Winner Takes All ◽  
Winner Take All ◽  
Take All

This paper presents a new approach for making a four bit priority resolution circuit using current mode winner Take all (WTA) analog computation cells, the winner-takes-all circuit is employed to evaluate the highest input among a set of competing inputs and inhibit the others. This circuit consists of an input stage, a current mode Lazzaros WTA circuit and an output stage consisting of current mirror and load resistor. This circuit is compact, consisting of a total of 28 transistors including the input stage, and a good linearity is observed in response. Simulation of proposed circuit is performed on cadence virtuoso software in 0.18 μm CMOS process technology.

Sign in / Sign up

Export Citation Format

Share Document