scholarly journals Analisa Perancangan Filter LCL Pada Penyearah PWM Satu Fasa Full Bridge

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Hari Anna Lastya
Keyword(s):  
Direct Current ◽  
Power Supply ◽  
Single Phase ◽  
Alternating Current ◽  
Power Source ◽  
The Other ◽  
Lcl Filter ◽  
The Third ◽  
Pwm Rectifiers

Electronics devices need a direct current power supply although now only one alternating current power supply is available. Therefore, ac-dc converters which can convert an alternating current power supply to a direct current power supply will be needed. However, the use of this ac-dc converters will cause distortion in the form of current waves which are called harmonics. This harmonics can fault the work of the other electric devices which are attached to the same power source. Therefore, it is recommended that the harmonics generated by rectifiers should be under IEC 61000-3-2 standard. In this research will the reduction of harmonics by using LCL filter. At load of 2 kW, R of 5 , L of 0,05 H at PWM rectifiers single phase full bridge with RL load produce the third harmonics current of 2.57 amperes, the installed LCL filter produces the third harmonics current of 1.26 amperes. According to IEC-61000-3-2 standard, the allowed third harmonics current is 2.3 amperes.

Improving the Efficiency of High-Speed AC Contact Suspension

2021 ◽  
Vol 5 (5) ◽  
pp. 39-43
Author(s):  
Maksim V. SHEVLYUGIN ◽  
◽  
Daria V. SEMENOVA ◽  
Keyword(s):  
Power Supply ◽  
High Speed ◽  
Single Phase ◽  
New Technologies ◽  
Alternating Current ◽  
Rolling Stock ◽  
New Materials ◽  
High Speed Railway ◽  
Electric Rolling Stock ◽  
Electrified Railways

When developing a high-speed contact suspension for railways electrified with alternating current, it is important to ensure that the electric rolling stock passes the neutral insert without turning off the current and without reducing the speed of movement. The article provides an analysis of previously developed devices in the field of power supply of electrified railways of single-phase alternating current, in which an attempt was made to pass an electric rolling stock of a neutral insert without disconnecting the load. The device of isolating coupling of a catenary and a neutral insert for high-speed railway lines electrified on alternating current is described. In this case, the passage of the neutral insert is carried out under current and braking of the electric rolling stock will not occur. Among other things, to improve the efficiency of high-speed contact suspension for railways electrified with alternating current, it is proposed to use new materials and new technologies that can be used in the device of insulating coupling of the catenary

Simulation of Three Levels Single Phase Inverter Using Proteus Software

2015 ◽  
Vol 793 ◽  
pp. 315-319
Author(s):  
M. Zhafarina ◽  
M. Irwanto ◽  
A.H. Haziah ◽  
N. Gomesh ◽  
Y.M. Irwan ◽  
...  
Keyword(s):  
Direct Current ◽  
Output Voltage ◽  
Single Phase ◽  
Pulse Wave ◽  
Input Voltage ◽  
Alternating Current ◽  
Exact Simulation ◽  
Phase Inverter ◽  
Single Phase Inverter

Photovoltaic is use to supply electricity from sunlight. Inverter is used to convert the direct current (DC) from photovoltaic to alternating current (AC). This project is to design and develop a single phase inverter that able to invert the input voltage of DC to output voltage of AC using PROTEUS software. The inverter based on 8 bits for one cycle of a driver pulse wave. This simulation used before doing the hardware. This software can save a lot of time on this exact simulation of the prototype.

A System for Characterizing Batteries and their Charging-Discharging Properties

2015 ◽  
Vol 771 ◽  
pp. 96-99
Author(s):  
Muhammad Miftahul Munir ◽  
Syamsudin Nur Wahid ◽  
Ferry Iskandar ◽  
Khairurrijal
Keyword(s):  
Power Supply ◽  
Electronic Devices ◽  
Electronic System ◽  
Power Source ◽  
The Other ◽  
Nimh Battery

Currently, battery is very indispensable as a power supply of various electronic devices. Therefore, research on batteries has developed rapidly and their charging-discharging properties must be characterized. This paper reports the development of an electronic system used to characterize batteries. The system consists of a programmable power source (PPS), a programmable load (PL), an amperemeter, a voltmeter, and a computer. The PPS and PL are used interchangeably, one for charging and the other for discharging. A battery under test (BUT) is directly connected to the PPS and PL interchangeably. A 1.2 V NiMH battery with a capacity of 750mAh has been characterized their charging-discharging properties. It has been found that the curves of charge and discharge are in accordance with the theories.

scholarly journals Design and construction of an inverter using solar cell as a source of charger

2013 ◽  
Vol 5 (1) ◽  
pp. 30-36
Author(s):  
J. Olakunle Coker ◽  
B. Abdulrahaman Ogunji
Keyword(s):  
Solar Cell ◽  
Developing Country ◽  
Direct Current ◽  
Power Supply ◽  
Electricity Generation ◽  
Alternating Current ◽  
Photovoltaic System ◽  
Generating Set ◽  
Domestic Appliance ◽  
Better Than

The present study is basically on electricity generation in which solar cell or module is used to power an inverter. This can also be called photovoltaic system, because it consists of solar modules, solar charge controller, 24V.d.c battery and an inverter. Solar modules serve as source of charger through solar charge controller to the battery and inverter are used in converting the direct current into an alternating current for the domestic appliance. This study is very useful in electricity generation especially in a developing country such as Nigeria where there is epileptic power supply. It-’s use is far better than generating set because it needs less maintenance, it does not use fuel, it is not heavy, it is rugged, it does not need an alternating current for its charging and it is noiseless.

Uninterruptable Power Supply based on Switching Regulator and Modified Sine Wave

2017 ◽  
Vol 7 (3) ◽  
pp. 1161
Author(s):  
Anna Nur Nazilah Chamim ◽  
Muhammad Heru Gustaman ◽  
Nia Maharani Raharja ◽  
Iswanto Iswanto
Keyword(s):  
Direct Current ◽  
Power Supply ◽  
Alternating Current ◽  
Sine Wave ◽  
Square Wave ◽  
Backup System ◽  
Sudden Failure ◽  
Switching Regulator

The availability of the electricity in doing a job lead to a dependency on it. If there is a sudden failure on electricity, it will result in unfinished works. To overcome the undesired situation because of wasting time, it is advisable to have your power supply. The power supply can serve to replace electricity temporarily, or it could be as a replacement for power supply of PLN’s (State Electricity Company) electricity nets to meet the daily electricity needs. Backup power available can sufficiently replace the source of PLN’s electricity nets with the output of square wave to the ordinary electricity needs. The type of the intended power supply is inverter system as a backup system that supplies daily electricity. In this case, it aims to change the DC (direct current) to AC (alternating current) voltages.

scholarly journals Single Phase AC Current Controller by Using Hysteresis Method

2019 ◽  
Vol 125 ◽  
pp. 14004
Author(s):  
Zulkhairi ◽  
Mochammad Facta ◽  
Trias Andromeda ◽  
Hermawan ◽  
Iwan Setiawan
Keyword(s):  
Power Supply ◽  
Single Phase ◽  
Current Source ◽  
Energy Resource ◽  
Alternating Current ◽  
Voltage Source ◽  
Electric Power Supply ◽  
Current Controller ◽  
Ac Current ◽  
A Current

Generally, the electrical power supply acts as a voltage source only but many applications, current sources are needed. In conventional methods, to provide a current source, an electric power supply with variable voltage is adjusted to give the amount of current. In some electrical applications and devices, there is a demand to have a constant voltage with a variable current. This paper proposes a single phase alternating current controller as a power supply with a current source that can be adjusted using the hysteresis method. The advantage of the hysteresis method is that the electric current can follow changes in setting values and have a good response to any changes in the load given. This method, the actual current can follow the reference flow as needed. During testing, the inverter has succeeded in producing 3 Ampere 50 Hz at the output voltage of 50 Volt which is sent to the load. In applications, the proposed power supply is useful as an inverter to convert DC current into AC current. Furthermore, this proposed inverter has the opportunity as a renewable energy resource converter to convert direct current from photovoltaic to alternating current for various electronic devices in industries and households.

Current and Voltage Choice for North American Railroad Electrifications: 1895-1931

2020 ◽  
Author(s):  
John G. Allen
Keyword(s):  
Direct Current ◽  
North American ◽  
Single Phase ◽  
Low Voltage ◽  
Alternating Current ◽  
Early Adopters ◽  
Medium Voltage ◽  
Medium Voltage Dc

Abstract The variety of currents and voltages adopted by North American railroads between 1895 and 1931 is sometimes seen as confusing. Railroads faced choices between direct current (DC) and alternating current (AC), as well as among different voltages. But closer analysis shows a clear order to the specifications chosen. The technology options available at the time and the intended functions of these installations explain the specifications that railroads chose. Railroads electrifying fell into three basic groups: 1. Early adopters (usually requiring electrification for tunnels), 2. Railroads electrifying after 1910 for commuter service, and 3. Railroads that electrified for, or at least with freight service in mind. Each of these faced very different sets of options, and made their choice of electrical specifications accordingly. There were four basic combinations of current and voltage: 1. Low-voltage DC delivered via third rail, 2. Medium-voltage DC, 3. Higher-voltage DC, and 4. AC (almost always single-phase at 11,000 Volts, 25 Hertz). For railroads in a given category, the practicable choices were in fact limited to one or two options. Contrary to what is sometimes thought, the different electrical specifications reflected an underlying logic, not disorder.

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