scholarly journals PENGISIAN AKI DENGAN BUCK CONVERTER

2013 ◽  
Vol 5 (1) ◽  
pp. 29-34
Author(s):  
Yul Antonisfia ◽  
Era Madona
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
Input Voltage ◽  
Buck Converter ◽  
Flow Sensor ◽  
Voltage Output ◽  
Charging Current ◽  
Lower Voltage

Buck converter is one of DC chopper which has the function of stabilizing the voltage to lower voltage where the output voltage is lower than the input voltage without having to remove power is relatively large. By using a buck converter is a high voltage can be reduced to lower as you wish without losing power is relatively large. The voltage output of the buck converter is able to charge the battery. The magnitude of the output voltage depends dutycyle switching generated by the microcontroller. This tool is also equipped with a flow sensor is used to detect the charging current into the battery. If the charging current is reduced, the buzzer will sound. The tool is based microcontrollers using BASCOM ATMEGA8535, which can generate a PWM with dutycyle specified. Dutycyle determined the size of the input voltage and the desired output.

scholarly journals Design Method of Double-Boost DC/DC Converter with High Voltage Gain for Electric Vehicles

2020 ◽  
Vol 11 (4) ◽  
pp. 64 ◽  
Author(s):  
Zhengxin Liu ◽  
Jiuyu Du ◽  
Boyang Yu
Keyword(s):  
Electric Vehicles ◽  
High Voltage ◽  
Direct Current ◽  
Output Voltage ◽  
Input Voltage ◽  
Maximum Efficiency ◽  
Voltage Gain ◽  
Current Feedback ◽  
Voltage Ripple ◽  
High Voltage Gain

Direct current to direct current (DC/DC) converters are required to have higher voltage gains in some applications for electric vehicles, high-voltage level charging systems and fuel cell electric vehicles. Therefore, it is greatly important to carry out research on high voltage gain DC/DC converters. To improve the efficiency of high voltage gain DC/DC converters and solve the problems of output voltage ripple and robustness, this paper proposes a double-boost DC/DC converter. Based on the small-signal model of the proposed converter, a double closed-loop controller with voltage–current feedback and input voltage feedforward is designed. The experimental results show that the maximum efficiency of the proposed converter exceeds 95%, and the output voltage ripple factor is 0.01. Compared with the traditional boost converter and multi-phase interleaved DC/DC converter, the proposed topology has certain advantages in terms of voltage gain, device stress, number of devices, and application of control algorithms.

Analysis of a Novel Isolated Input-Series and Output-Series Full-Bridge Bidirectional DC/DC Converter

2013 ◽  
Vol 273 ◽  
pp. 399-403
Author(s):  
Xiao Yu Zhao ◽  
Cong Wang ◽  
Feng Yang ◽  
Su Ke Wang
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
Power Conversion ◽  
Input Voltage ◽  
Soft Switching ◽  
High Power Density ◽  
High Input ◽  
Working Principle ◽  
High Output Voltage ◽  
High Output

A novel topology of isolated input-series and output-series (ISOS) full-bridge bidirectional DC/DC converter is described in this paper for the application requirement of high input voltage and high output voltage, which can be used in the next generation medium and high voltage power conversion systems. The proposed novel isolated bidirectional DC/DC converter not only can apparently decrease the stress of the switches, but also have the advantages, such as galvanic isolation, ease of realizing soft-switching control, high power density, and so on. In this paper, working principle of the proposed DC/DC converter is discussed in detail, the corresponding equations are derived, and the soft switching implementation is discussed too. In the end, simulation is done through PSIM to certify the feasibility of the proposed DC/DC converter and accuracy of the criterion.

Switching Power Supply Control Strategy Based on Monitoring Configuration

2021 ◽  
Vol 16 (5) ◽  
pp. 766-772
Author(s):  
Le Luo ◽  
Ming-Zhong Yang
Keyword(s):  
Predictive Control ◽  
Output Voltage ◽  
Distribution Systems ◽  
Control Method ◽  
Sliding Mode ◽  
Input Voltage ◽  
Buck Converter ◽  
Switching Power Supply ◽  
Switching Power ◽  
Overshoot And Undershoot

In this paper, a new discrete-time sliding mode predictive control (DSMPC) strategy with a PID sliding function is proposed for synchronous DC-DC Buck converter. The model predictive control, along with digital sliding mode control (DSMC) is able to further reducing the chattering phenomenon, steady-state error, overshoot, and undershoot of the converter output voltage. The proposed control method implementation only requires output error voltage evaluation. The effectiveness of the proposed DSMPC is proved through simulation results executed by the MATLAB/SIMULINK software. These results demonstrate its performance is superior to DSMC. The selected synchronous Buck converter in this paper has 380 V input voltage and 48 V output voltage that can be applied in sections of DC distribution systems.

State Feedback Controller Using Pole Placement Method for Linear Buck Converter to Improve Overshoot and Settling Time

2015 ◽  
Vol 793 ◽  
pp. 211-215
Author(s):  
Mazwin Mazlan ◽  
Noor Haqkimi ◽  
Chanuri Charin ◽  
Nur Fairuz ◽  
Nurul Izni ◽  
...  
Keyword(s):  
Output Voltage ◽  
State Feedback ◽  
Input Voltage ◽  
Buck Converter ◽  
Pole Placement ◽  
Electronic Circuits ◽  
Solution Approach ◽  
Placement Method ◽  
Lqr Controller ◽  
Step Down

Switched mode DC-DC converters are electronic circuits which convert a voltage from one level to a higher or lower level voltage. This paper presents a new solution approach to controller and observer controller of DC-DC Buck converter. The designs in this paper of DC-DC Buck converter is input voltage 20V step down to 12V output voltage. For control the system simulation investigation into development of controller and observer controller using MATLAB Simulink® software. The simulation develops of the controller and observer controller with mathematical model of DC-DC Buck converter. This paper also providing LQR controller to compare the performance of the system. Finally, the performance output voltage of DC-DC Buck converter is analyzed in terms of time response, overshoot and steady state error.

scholarly journals Dynamic analysis of the input-controlled buck converter fed by a photovoltaic array

2008 ◽  
Vol 19 (4) ◽  
pp. 463-474 ◽  
Author(s):  
Marcelo Gradella Villalva ◽  
Ernesto Ruppert Filho
Keyword(s):  
Dynamic Analysis ◽  
Output Voltage ◽  
Input Voltage ◽  
Buck Converter ◽  
Special Situation ◽  
Photovoltaic Array ◽  
Photovoltaic Applications ◽  
Constant Output

The control of the input voltage of DC-DC converters is frequently required in photovoltaic applications. In this special situation, unlike conventional converters, the output voltage is constant and the input voltage is controlled. This paper deals with the analysis and the control of the buck converter with constant output voltage and variable input.

scholarly journals Closed-Form Formulas for Automated Design of SiC-Based Phase-Shifted Full Bridge Converters in Charger Applications

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5380
Author(s):  
Kornel Wolski ◽  
Piotr Grzejszczak ◽  
Marek Szymczak ◽  
Roman Barlik
Keyword(s):  
High Voltage ◽  
High Power ◽  
Output Voltage ◽  
Design Procedure ◽  
Automated Design ◽  
Design Parameters ◽  
Switching Frequency ◽  
Voltage Level ◽  
Voltage Output ◽  
The Impact

Phase-Shifted Full Bridge (PSFB) topology in its four-diode variant is the choice with the lowest part count in applications that demand high power, high voltage, and galvanic isolation, such as in Electric Vehicle (EV) chargers. Even though the topology is prevalent in power electronics applications, no single, unified analytical model has been proposed for the design process of four-diode PSFB converters. As a result, engineers must rely on simulations and empirical results obtained from previously built converters when selecting components to properly match the DC source voltage level with the DC load voltage requirements. In this work, the authors provide a design-oriented analysis approach for obtaining the output voltage and semiconductor current values, ready for implementation in a spreadsheet- or MATLAB-type software to automate design optimization. The proposed formulas account for all the first-order nonlinear dependencies by considering the impact of each of the following eight design parameters: DC-link voltage, load resistance, phase-shift ratio, switching frequency, transformer turns ratio, magnetizing inductance, series inductance, and output inductance. The results are verified through experiments at the power level of 10 kW and the DC-link voltage level of 800 V by using a grid simulator and a SiC-based two-level Active Front End (AFE) with a DC–DC stage based on the PSFB topology. The accuracy of the output voltage formula is determined to be around 99.6% in experiments and 100.0% in simulations. Based on this exact model, an automated design procedure for high-power high-voltage SiC-based PSFB converters is developed. By providing the desired DC-link voltage, output voltage, output power, output current ripple factor, maximum temperatures, and semiconductor and heatsink databases, the algorithm calculates a set of feasible designs and points to the one with the lowest semiconductor losses, dimensions, or cost.

scholarly journals Vertical Stacked LEGO-PoL CPU Voltage Regulator

2021 ◽  
Author(s):  
Minjie Chen
Keyword(s):  
Output Voltage ◽  
Input Voltage ◽  
Voltage Regulator ◽  
Switched Capacitor ◽  
Switched Capacitor Circuits ◽  
Coupled Inductors ◽  
Current Sharing ◽  
Charging Current ◽  
In Series ◽  
Switched Capacitor Converter

<div>This paper presents a 48 V–1 V merged-two-stage hybrid-switched-capacitor converter with a Linear Extendable Group Operated Point-of-Load (LEGO-PoL) architecture for ultra-high-current microprocessors, featuring 3-D stacked packaging and coupled inductors for miniaturized size and vertical power delivery. The architecture is highly modular and scalable. The switched capacitor circuits are connected in series on the input side to split the high input voltage into multiple stacked voltage domains. The multiphase buck circuits are connected in parallel to distribute the high output current into multiple parallel current paths. It leverages the advantages of switched capacitor circuits and multiphase buck circuits to achieve soft charging, current sharing, and voltage balancing. The inductors of the multiphase buck converters are used as current sources to soft-charge and soft-switch the switched-capacitor circuits, and the switched-capacitor circuits are utilized to ensure current sharing among the multiphase buck circuits. A 780 A vertical stacked CPU voltage regulator with a peak efficiency of 91.1% and a full load efficiency of 79.2% at an output voltage of 1 V with liquid cooling is built and tested. This is the first demonstration of a 48 V–1 V CPU voltage regulator to achieve over 1 A/mm2 current density and the first to achieve 1,000 W/in3 power density. It regulates output voltage between 0.8 V and 1.5 V through the entire 780 A current range.</div>

scholarly journals Rancang bangun driver inverter 1000 Watt dengan kendali EGS - 002

JURNAL ELTEK ◽  
2021 ◽  
Vol 19 (1) ◽  
pp. 94
Author(s):  
Mohammad Luqman ◽  
Herwandi Herwandi ◽  
Donny Radianto
Keyword(s):  
Output Power ◽  
Output Voltage ◽  
Input Voltage ◽  
Sine Wave ◽  
Signal Generator ◽  
Switching Device ◽  
Input Terminal ◽  
Switching Transistor ◽  
Voltage Output ◽  
Sinusoidal Waveform

Abstrak Penelitian ini dimulai dengan penentuan spesifikasi sistem yang akan dibuat, yaitu sebuah inverter sinusoida pada tegangan output 220Vac pada  frekuensi 50 Hz dengan daya sekitar 1000 Watt. Kontrol utama menggunakan EGS-002 sebagai pembangkit sinyal SPWM dan sekaligus driver transistor switching. Sebagai peranti switching adalah 8 buah transistor MOSFET IRF 3205 dengan konfigurasi full-bridge. Sebagai pengubah sinyal SPWM menjadi sinyal sinusoida sekaligus penaik tegangan output digunakan trafo step-up 24V/220V 10A. Hasilnya berupa inverter dengan luaran berupa gelombang sinusoida dengan spesifikasi sebagai berikut: Tegangan masukan 24 VDC. Tegangan luaran 221 VAC dengan bentuk gelombang sinusoida murni pada frekuensi 50 Hz. Daya luaran sampai dengan 905 Watt. Dimensi alat adalah: Panjang 30,5 cm x Lebar 18,5 cm x tinggi 12 cm, dengan berat kurang lebih 3 kg, yang dilengkapi dengan terminal masukan 24Vdc dan 2 buah terminal output 220 Vac (stop kontak).   Abstract This research begins with determining the specifications of the system to be made, namely a sinusoidal inverter at an output voltage of 220Vac at a frequency of 50 Hz with a power of about 1000 Watts. The main control uses the EGS-002 as the SPWM signal generator as well as the switching transistor driver. As a switching device are 8 MOSFET transistors IRF 3205 with a full-bridge configuration. To convert the SPWM signal into a sinusoidal signal as well as to increase the output voltage, a 24V / 220V 10A step-up transformer is used. The result is an inverter with a sine wave output with the following specifications: 24 VDC input voltage. Output voltage 221 VAC with pure sinusoidal waveform at a frequency of 50 Hz. Output power up to 905 Watts. The dimensions of the tool are: Length 30.5 cm x Width 18.5 cm x height 12 cm, weighing approximately 3 kg, equipped with a 24Vdc input terminal and 2 220 Vac output terminals (electric socket).

scholarly journals Design and Implementation of Buck Converter for Fast Charging with Fuzzy Logic

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Indhana Sudiharto ◽  
Moch. Igam Rahadyan ◽  
Ony Asrarul Qudsi
Keyword(s):  
Output Voltage ◽  
Buck Converter ◽  
Constant Current ◽  
Constant Voltage ◽  
Battery Charger ◽  
Output Current ◽  
Charging Rate ◽  
Battery Capacity ◽  
Fast Charging ◽  
Charging Current

This research presents a battery charger design that can charge faster than using a PWM type solar charge controller (SCC). SCC is often operated when the battery capacity is 80% so that the charging current that can be provided is only 10% to 20% of the battery capacity. The battery charging method applied in this study uses the principle of fast charging by adjusting the value of the current and the output voltage value of the buck converter. Fast charging has its own characteristic, obviously, the charging rate that is greater than the usual charging method, which is up to 1C of the battery capacity. The principle of fast charging in this study uses the constant current / constant voltage method. This converter is designed with the ability to produce current by the charging rate of 1C from a 12Ah battery capacity of 12 A and an output voltage of 16.8 V. To ensure that the output of the converter matches the setpoint, the duty cycle value is adjusted using fuzzy control. Based on the results obtained from the simulation, the control of this study obtained an output current 12  Amperes with error ripple current around 8.3%. The SOC on this battery increased by 75.74% in 45 minutes.

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