scholarly journals Comparison between PI, PR+HC, and modified PR+HC current controller in inverter system

2019 ◽  
Vol 13 (3) ◽  
pp. 1167
Author(s):  
S. Salimin ◽  
M. Armstrong ◽  
S.A. Jumaat ◽  
R. Hamdan
Keyword(s):  
Power Electronic ◽  
Power Network ◽  
Compensation Scheme ◽  
Electronic Components ◽  
Harmonic Compensation ◽  
Proportional Integral ◽  
Current Controller ◽  
System Power ◽  
Study Development

<span>This paper presents the comparison between proportional integral (PI) current controller, proportional resonance and harmonic compensator (PR+HC) current controller and modified PR+HC current controller in the inverter system. Power electronic components like inverter and current controller uses in the system produce unwanted harmonics that affect the quality of distribution power network. In this study, development and simulation of current controller using conventional proportional integral (PI), the selective harmonic compensation scheme (PR+HC), and modified version of the latter are considered so to overcome these harmonics injection. Modification is by adding control parameter randomisation technique to the PR+HC scheme. Results compare the three controllers and proved that with modification to the selective harmonic compensation scheme, the overall current THD can be reduced</span>

Impacts of Current and Voltage Harmonics for Industrial Power Network

2019 ◽  
Vol 891 ◽  
pp. 239-245
Author(s):  
Nattachote Rugthaicharoencheep
Keyword(s):  
Power Quality ◽  
Medical Devices ◽  
Voltage Sags ◽  
Power Network ◽  
Equipment Manufacturing ◽  
The Subject ◽  
Voltage Harmonics ◽  
Domestic Appliances ◽  
System Power

Power quality (PQ) has become a more important issue recently due to the use of more sophisticated and sensitive equipment. Medical devices, telecommunication servers and equipment, manufacturing and domestic appliances rely on a good supply of power. This paper presents the review of the power quality in power system. Power quality has always been important for customers, but with increasing applications of electronic loads and controllers sensitive to the power quality, the subject has attracted renewed interest in recent times. Power quality encompasses several aspects: harmonics, over voltage, flicker voltage sags and swells interruptions etc. A major factor contributing to the importance of the quality of power is the deregulation of the power industry. Customers will demand higher levels of power quality to ensure the proper and continued operation of sensitive equipment and processes.

Study on the Die-Attach Voids Distribution With X-Ray and Image Processing Techniques

2019 ◽  
Vol 141 (2) ◽  
Author(s):  
Aleksander Sesek ◽  
Olga Chambers ◽  
Janez Trontelj
Keyword(s):  
Image Processing ◽  
Power Electronic ◽  
Electronic Components ◽  
Power Transistor ◽  
X Ray ◽  
Die Attach ◽  
Void Area ◽  
Manual Interaction ◽  
Processing Techniques

Power electronic components' reliability depends, to a great extent, on the quality of die-attach technology. The voids appearance in the die-attach regions is almost unavoidable during the manufacturing process. The aim of this paper is to demonstrate that image processing tools enable fast and accurate void segmentation, while reducing manual interaction for X-ray monitoring of imperfect power transistor die soldering. The most common void parameters such as void area, void distribution, and shape roundness were extracted and used for statistical analysis.

Performance Improvement of SVPWM-Based Three-Phase Grid-Connected Inverters

2013 ◽  
Vol 732-733 ◽  
pp. 1261-1264
Author(s):  
Zhi Lei Yao ◽  
Lan Xiao ◽  
Jing Xu
Keyword(s):  
Dynamic Response ◽  
Control Strategy ◽  
Pulse Width Modulation ◽  
Control Method ◽  
Grid Current ◽  
Current Controller ◽  
Three Phase ◽  
Reference Grid ◽  
Grid Connected Inverter

An improved control strategy for three-phase grid-connected inverters with space vector pulse width modulation (SVPWM) is proposed. When the grid current contains harmonics, the d-and q-axes grid currents is interacted in the traditional control method, and the waveform quality of the grid current is poor. As the reference output voltage cannot directly reflect the change of the reference grid current with the traditional control strategy, the dynamic response of the grid-connected inverter is slow. In order to solve the aforementioned problems, the d-and q-axes grid currents in the decoupled components of the grid current controller are substituted by the d-and q-axes reference grid currents, respectively. The operating principles of the traditional and proposed control methods are illustrated. Experimental results show that the grid-connected inverter with the improved control strategy has high waveform quality of the grid current and fast dynamic response.

Thermal inspection of solder quality of electronic components

1999 ◽  
Author(s):  
Jussi Varis ◽  
Reijo K. Lehtiniemi ◽  
Reijo Vuohelainen
Keyword(s):  
Electronic Components ◽  
Thermal Inspection

Regulator Circuit Transformer Voltage-Second Product Analysis

2014 ◽  
Vol 529 ◽  
pp. 501-505
Author(s):  
Chi Zhang ◽  
Ming Zhi He
Keyword(s):  
Power Supply ◽  
Power Electronic ◽  
Product Analysis ◽  
Power Regulator ◽  
Current Voltage ◽  
Three Phase ◽  
The Impact ◽  
Power Electronic Technology ◽  
Primary Current

With the continuous development of power electronic technology, the advantages of thyristor power regulator circuit gradually get more and more applications. It improves the quality of power supply, makes the equipment efficiency and power factor higher and so saves a lot of electricity. Through the calculation of the primary current when thyristor turns off in three-phase power regulator circuit with transformer load, the impact of the thyristors turn-off order on the transformer primary current voltage-second product is analysised, and through simulation the exactness is verified.

scholarly journals A Modified Modular Multilevel Converter with Reduced Number of Power Electronic Components

2015 ◽  
Vol 38 (1) ◽  
pp. 1-8
Author(s):  
I.A. Harbi ◽  
Haitham Z. Azazi ◽  
Azza E. Lashine ◽  
Awad. Elsabbe
Keyword(s):  
Modular Multilevel Converter ◽  
Power Electronic ◽  
Multilevel Converter ◽  
Electronic Components

scholarly journals Direct Ink Writing of Materials for Electronics-Related Applications: A Mini Review

2021 ◽  
Vol 8 ◽  
Author(s):  
Zhenzhong Hou ◽  
Hai Lu ◽  
Ying Li ◽  
Laixia Yang ◽  
Yang Gao
Keyword(s):  
Human Life ◽  
Electronic Devices ◽  
Electronic Components ◽  
Direct Ink Writing ◽  
Recent Developments ◽  
Print Materials ◽  
On Chip ◽  
Functional Components ◽  
Printing Techniques

Recently, the fabrication of electronics-related components via direct ink writing (DIW) has attracted much attention. Compared to the conventionally fabricated electronic components, DIW-printed ones have more complicated structures, higher accuracy, improved efficiency, and even enhanced performances that arise from well-designed architectures. The DIW technology allows directly print materials on a variety of flat substrates, even a conformal one, well suiting them to applications such as wearable devices and on-chip integrations. Here, recent developments in DIW printing of emerging components for electronics-related applications are briefly reviewed, including electrodes, electronic circuits, and functional components. The printing techniques, processes, ink materials, advantages, and properties of DIW-printed architectures are discussed. Finally, the challenges and outlooks on the manufacture of 3D structured electronic devices by DIW are outlined, pointing out future designs and developments of DIW technology for electronics-related applications. The combination of DIW and electronic devices will help to improve the quality of human life and promote the development of science and society.

scholarly journals Designing Automatic Meter Reading System Using Open Source Hardware and Software

2017 ◽  
Vol 7 (6) ◽  
pp. 3282 ◽  
Author(s):  
Dragan Mlakić ◽  
Srete Nikolovski ◽  
Emir Alibašić
Keyword(s):  
Open Source ◽  
Low Voltage ◽  
Electronic Components ◽  
Unlimited Number ◽  
Automatic Meter Reading ◽  
Automatic Meter Reading System ◽  
Reading System ◽  
Open Source Hardware ◽  
Physical Quantities

The importance of quality of the measured values is very dependent on the device that measures these values: the size of the sample, the time of measurement, periods of measurement, the mobility and the robustness of the device, etc. Contemporary devices intended for the measurement of physical quantities that are on the market vary in price, as well as and the quality of the measured values. The rule "the more expensive the better" is not necessarily always a rule that is valid because it all depends on the characteristics and capabilities of the device, and the customer’s needs. In this paper, a device based on "Open Source" components of hardware and software will be presented. Device was used to measure voltages and currents on low voltage networks, on which a virtually unlimited number of sensors can be added, and the device is assembled of components available on electronic components Internet.

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