scholarly journals Optimasi Sistem Photovoltaik Menggunakan Cuk Konverter Berbasis Simple Perturb and Observe Method

2021 ◽  
Vol 2 (01) ◽  
pp. 24-29
Author(s):  
Tatit Sulis ◽  
Fathoni Fathoni ◽  
Ratna Putri
Keyword(s):  
Duty Cycle ◽  
Power Supply ◽  
Perturb And Observe

Mengingat indonesia merupakan negara tropis, ketersediaan energi matahari cukup melimpah di Indonesia karena musim kemarau berlangsung selama 6 bulan. Photovoltaik juga dapat digunakan sebagai sumber energi listrik di daerah terpencil yang masih belum terjangkau oleh PLN. Rancangan Cuk konverter dipilih karena mampu menurunkan dan menaikkan tegangan sumber dari photovoltaik 200WP. Kelebihan cuk konventer mampu mengurangi ripple pada keluaran PV yang dapat menyebabkan tegangan akan lama mencapai konstan. Metode MPP tracking yang terkenal adalah metode perturb and observe (P&O). PWM digunakan untuk mengontrol konverter dan mengontrol tegangan yang di inginkan. Hasil pengujian tegangan masukan power supply 12V. dengan duty cycle 10% menghasilakan tegangan  1.99V. Sementara hasil pengujian masukan power supply 12V, dengan duty cycle 60% menghasilkan tegangan 11.59V. Penerapan P&O pada cuk konverter dirasa cukup efektif pada sistem photovoltaik dengan hasil yang cukup stabil dengan rata-rata keluaran tegangan 23,848 Volt. Kata kunci: Photovoltaik, Cuk Konverter, PWM, P&O.

An Adaptive Perturb and Observe Maximum Power Point Tracking System for Photovoltaic Arrays

Solar Energy ◽  
2005 ◽  
Author(s):  
Mohammad Serhan ◽  
Sami H. Karaki ◽  
Lena R. Chaar
Keyword(s):  
Duty Cycle ◽  
Tracking System ◽  
Sudden Change ◽  
Maximum Power ◽  
Atmospheric Conditions ◽  
Step Size ◽  
Maximum Power Point ◽  
Perturb And Observe ◽  
Large Perturbation ◽  
Power Point

This paper presents a maximum power point (MPP) hardware tracking system based on an adaptive Perturb and Observe (PAO) algorithm. Under a given solar and temperature condition the search for the MPP starts with a large perturbation step. When a drop in the delivered power is detected, the size of the step is halved and the direction of duty cycle change is reversed. Eventually the MPP will be tracked by small perturbation step (e.g. 1/ 255). When tracking at a maximum and a sudden change occurs in the atmospheric conditions, the system will try to reach the new MPP, with an adaptive perturbation step size that is allowed to increase after 4 consecutive increases or decrease in the duty cycle leading to increase in power delivery. This adaptive PAO algorithm forces the system to respond fairly quickly to any changes in the solar radiation or temperature level irrespective of where the previous operating point MPP was and without deteriorating the tracking efficiency. A tracking efficiency of about 96% was achieved using a very simple controller.

Effect of PWM Duty Cycle and Frequency of Power Supply to the LED Bulb Efficacy

2017 ◽  
Vol 8 (3) ◽  
pp. 1011
Author(s):  
Andi Pawawoi ◽  
Wahyu Prabowo
Keyword(s):  
Duty Cycle ◽  
Power Supply ◽  
Light Flux ◽  
Luminous Flux ◽  
Light Bulb ◽  
A Value ◽  
Specific Frequency

In this paper described the effect of frequency and duty cycle of the PWM power supply LED bulb light efficacy. Efficacy LED bulb is measured by measuring the light flux and power consumed at standard conditions, the bulb is supplied directly from the network. Then efficacy, the luminous flux and power the bulb is also measured under the conditions given PWM power supply at some frequency and duty cycle value. In the same light flux levels between the two treatment, the use of PWM power supply can increase the efficacy of the light bulb up to 66.2%, with a value of 117.52 light efficacy lumen / Watt. At the level of light flux which is slightly lower, the use of PWM power supply to the LED bulb with a specific frequency and power supply can achieve the efficacy of 397.14 lumens / Watt

Designing of a High Voltage Power Supply for Electrospinning Apparatus Using a High Voltage Flyback Transformer (HVFBT)

2015 ◽  
Vol 771 ◽  
pp. 145-148 ◽  
Author(s):  
Muhammad Miftahul Munir ◽  
Dian Ahmad Hapidin ◽  
Khairurrijal
Keyword(s):  
High Voltage ◽  
Duty Cycle ◽  
Power Supply ◽  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Experimental Results ◽  
High Voltage Power Supply ◽  
Electrospinning Technique ◽  
The World

Research on nanofiber materials is actively done around the world today. Various types of nanofibers have been synthesized using an electrospinning technique. The most important component when synthesizing nanofibers using the electrospinning technique is a DC high voltage power supply. Some requirements must be fulfilled by the high voltage power supply, i.e., it must be adjustable and its output voltage reaches tens of kilovolts. This paper discusses the design and development of a high voltage power supply using a diode-split transformer (DST)-type high voltage flyback transformer (HVFBT). The DST HVFBT was chosen because of its simplicity, compactness, inexpensiveness, and easiness of finding it. A pulse-width modulation (PWM) circuit with controlling frequency and duty cycle was fed to the DST HVFBT. The high voltage power supply was characterized by the frequency and duty cycle dependences of its output voltage. Experimental results showed that the frequency and duty cycle affect the output voltage. The output voltage could be set from 1 to 18 kV by changing the duty cycle. Therefore, the nanofibers could be synthesized by employing the developed high voltage power supply.

scholarly journals Rancang Bangun Sistem Catu Daya dengan Metode Switching Mode Power Supply (SMPS) Berbasis Arduino untuk Aplikasi Electrospinner

2020 ◽  
Vol 8 (1) ◽  
pp. 25-34
Author(s):  
Khoirul Effendi ◽  
◽  
Junaidi Junaidi ◽  
Sri Wahyu Suciyati ◽  
◽  
...  
Keyword(s):  
High Voltage ◽  
Duty Cycle ◽  
Power Supply ◽  
Output Voltage ◽  
Electronic Devices ◽  
Laboratory Scale ◽  
Power Supplies ◽  
Syringe Pump ◽  
Switching Mode Power Supply ◽  
Switching Mode

Research about power supplies has been developed for various requirement. The power supply is used to supply electronic devices and laboratory-scale equipment, one of which is electrospinner. Electrospinner is an instrument used to make nanofibers consisting of several components, namely: power supply, high voltage, syringe pump, and collector drum. Electrospinner requires a stable supply of voltage so that the system can work well and requires a lot of voltage supply to supply components from the electrospinner. Arduino-based switching mode power supply (SMPS) is designed in this research. Arduino-based SMPS makes it possible to produce a stable supply with many outputs. Arduino as a PWM generator is used to control the power supply output voltage based on duty cycle. The results of the study addressed the duty cycle affecting the output of the power supply. The output voltage generated by the power supply can be set from 0-100 V with an accuracy of 98.19%, an error of 1.81% and a precision of 0.02% which is stated by the variation of the coefficient. The power supply produced also has an extra output voltage of 15 VCT and 15 V.

scholarly journals Development and testing of a light dimming control using arduino uno

2022 ◽  
Vol 1212 (1) ◽  
pp. 012043
Author(s):  
Waluyo ◽  
F Hadiatna ◽  
A Widura ◽  
P Setiana
Keyword(s):  
Duty Cycle ◽  
Power Supply ◽  
Output Voltage ◽  
Electrical Energy ◽  
Voltage Source ◽  
Lighting System ◽  
Human Needs ◽  
Dimming Control ◽  
Arduino Uno ◽  
Maximum Voltage

Abstract Increasing population and human needs have an impact on increasing the need for electrical energy. One of them is for lighting needs. Therefore, it is necessary to save the lighting system so that energy consumption is minimum and the need for lighting is optimal, by controlling light dimming. This paper presents an implementation and testing of a dimming light control using an Arduino Uno microcontroller. The circuit used a 12-volt power supply, as a voltage source, to increase to 42 volts, to meet a lamp voltage, through a dc-dc converter. After obtaining the maximum voltage, a MOSFET cut off the voltage according to the desired light or performance level. The duty cycle was directly proportional to the output voltage, using a PWM coding to get the necessary light intensity. Some testing was conducted, including the measurement point shifting to the side. The testing results show that PMW and LDR decreased as the duty cycle increased. Nevertheless, both decreasing are different, the PWM decreased linearly with a gradient of -2.55 and the LDR decreased hyperbolically. While, the illuminance, current, and power rose as the duty cycle increased. The illuminance increased, tent to be saturated, as the power increased. However, the illuminance was reduced as the PWM and LDR increased. The illuminance decreased slightly as the measurement points shifted to the side.

A half-bridge IGBT drive and protection circuit in dielectric barrier discharge power supply

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Xingquan Wang ◽  
Xiuyuan Lu ◽  
Wei Chen ◽  
Fengpeng Wang ◽  
Jun Huang ◽  
...  
Keyword(s):  
Response Time ◽  
Dielectric Barrier Discharge ◽  
Duty Cycle ◽  
Power Supply ◽  
Barrier Discharge ◽  
Discharge Power ◽  
Current Response ◽  
Dielectric Barrier ◽  
Content Type ◽  
Protection Circuit

Purpose This paper aims to improve the general circuit of driving and protection based on insulated gate bipolar transistor (IGBT) in dielectric barrier discharge power supply by designing a novel half-bridge inverter circuit with discrete components. Design/methodology/approach With one SG3524 chip, the structure based on discrete components is used to design the IGBT drive circuit. The driving waveform is isolated and sent out by photo-coupler 6N137. The protection circuit is realized by Hall sensor directly detecting the main circuit current, supplemented by a few components, including diodes, resistors, capacitors and triodes. It improves the reliability of the protection circuit. Findings In the driving circuit, the phase difference of signals from two channels are 180°. Moreover, when the duty cycle is set at 40%, it can ensure sufficient pulse width modulation response time. In the protection circuit, when over-current occurs, an intermittent output signal is automatically sent out. Furthermore, the over-current response time can be controlled independently. The peak voltage can be adjusted continuously from 0 to 30 kV with its frequency from 8 to 25 kHz and the power output up to 150 W. Originality/value The novel circuit of driving and protection makes not only its structure simpler and easier to be realized but also key parameters, such as frequency, the duty cycle and the driving voltage, continuously adjustable. Moreover, the power supply is suitable for other discharges such as corona discharge and jet discharge.

A Study on Pulse Generator for Micro WEDM of Polycrystalline Diamond

2012 ◽  
Vol 516 ◽  
pp. 498-503 ◽  
Author(s):  
Mu Tian Yan ◽  
Yi Ting Liu ◽  
Guan Ren Fang
Keyword(s):  
Surface Finish ◽  
Duty Cycle ◽  
Power Supply ◽  
Pulse Generator ◽  
Control Method ◽  
Polycrystalline Diamond ◽  
Pulse Control ◽  
Peak Current ◽  
Ac Power ◽  
Discharge Duration

This paper presents a new pulse generator for cutting of polycrystalline diamond (PCD) by micro wire-EDM. Three pulse control methods (AC power supply pulse control method, fixed pulse width modulation pulse control method and improved AC power supply pulse control method) have been proposed to achieve high frequency and low energy discharge pulses. The improved AC power supply pulse control method enables the pulse generator to provide a period of 20 μs off duty cycle followed by a period of duty cycle for reionization of the dielectric in the spark. Compared to the other two methods, the improved AC method can provide smaller peak current and discharge duration and thereby achieve a smaller slit width and better surface finish. Tests revealed that the developed power supply using anti-electrolysis circuitry and a digital signal processor-based pulse control circuit can provide very low discharge energy pulses with a frequency of 200 KHz, discharge duration of 0.75 μs and a peak current of 3 A. Experimental results demonstrate that the proposed pulse generator can achieve a feed rate of 0.4 mm/min, a surface finish of 0.53 μm Ra and a damaged layer of 5 μm on PCD surface through proper machining settings.

A Novel Single Source Multiple Output Converter Integrating Buck-Boost and Fly Back Yopology for SMPS Applications

2017 ◽  
Vol 8 (3) ◽  
pp. 733 ◽  
Author(s):  
A. Kalirasu
Keyword(s):  
Duty Cycle ◽  
Power Supply ◽  
Output Voltage ◽  
Pi Controller ◽  
Single Source ◽  
Matlab Simulink ◽  
Boost Converters ◽  
Wide Range ◽  
Input Source ◽  
Switched Mode Power Supply

<p>This paper presents a novel single DC input source and multiple DC output suitable for switched mode power supply (SMPS) applications integrating interleaved boost and sepic converter with fly back topology. The proposed converter can be remodeled for any required output voltage power supply without changing hardware structure because wide range of output voltage can be obtained using sepic and boost converters by changing duty cycle command by implementing a simple voltage input pi controller. Conventional fly back topology is added to interleaved circuit to produce desired dc output voltage this voltage can be controlled by choosing turns ratio of fly back transformer. The proposed multi output DC converter is simulated in MATLAB/Simulink environment and results are presented for verifying merits of the converter.</p>

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