scholarly journals Minimal switching of multiple input multilevel output DC-DC converter

2021 ◽  
Vol 12 (2) ◽  
pp. 968
Author(s):  
Amer A. Chlaihawi ◽  
Ameen Al-Modaffer ◽  
Hur Jedi
Keyword(s):  
Circuit Design ◽  
Low Voltage ◽  
Electric Circuit ◽  
Conversion Ratio ◽  
Power Losses ◽  
Multiple Input ◽  
Voltage Stress ◽  
Reduction Number ◽  
And Performance ◽  
The Cost

This paper proposes a minimal switching multiple input multilevel output (MS-MIMLO) DC-DC converter. Minimizing the cost of operation is an utmost priority of any electric circuit design. Thus, reduction number of switches that control and manage the operation of feeding power into the MIMLO DC-DC convertors is presented. The proposed MS-MIMLO DC-DC converter exerts many advantages, include high voltage transfer ratio with a small size inductor, reduced power losses and low voltage stress across the semiconductor devices. Beside the highly conversion ratio and efficiency, the characteristics of the proposed converter have a simple configuration with low number of components as well. The MATLAB/Simulink software was implemented to simulate the proposed topology in order to verify the performance of the MS-MIMLO DC-DC converter. The result of simulations demonstrated the benefits of reducing the number of switches without affecting the operation and performance of the MIMLO DC-DC converter circuit.

scholarly journals A Novel Modified Switched Inductor Boost Converter with Reduced Switch Voltage Stress

2020 ◽  
Author(s):  
Shima Sadaf ◽  
Nasser Al-Emadi ◽  
Atif Iqbal ◽  
Mohammad Meraj ◽  
Mahajan Sagar Bhaskar
Keyword(s):  
Output Voltage ◽  
Low Voltage ◽  
Electric Utility ◽  
Boost Converter ◽  
Conversion Ratio ◽  
Total Output ◽  
Dc Microgrid ◽  
Power Circuit ◽  
Voltage Stress ◽  
Utility Grid

DC-DC power converters are necessary to step-up the voltage or current with high conversion ratio for many applications e.g. photovoltaic and fuel cell energy conversion, uninterruptible power supply, DC microgrid, automobile, high intensity discharged lamp ballast, hybrid vehicle, etc. in order to use low voltage sources. In this project, a modified SIBC (mSIBC) is proposed with reduced voltage stress across active switches. The proposed mSIBC configuration is transformerless and simply derived by replacing one diode of the classical switched inductor structure with an active switch. As a result, mSIBC required low voltage rating active switches, as the total output voltage is shared between two active switches. Moreover, the proposed mSIBC is low in cost, provides higher efficiency and required the same number of components compared to the classical SIBC. The experimental results are presented which validated the theoretical analysis and functionality, and the efficiency of the designed converter is 97.17%. The proposed mSIBC converter provides higher voltage conversion ratio compared to classical converters e.g. boost, buck-boost, cuk, and SEPIC. The newly designed configurations will aid the intermediate power stage between the renewable sources and utility grid or high voltage DC or AC load. Since, the total output voltage is distributed among the two active switches, low voltage rating switches can be employed to design the power circuit of the proposed converter. The classical boost converter or recently proposed switched inductor based boost converter can be replaced by the proposed mSIBC converter in real-time applications such as DC microgrid, DC-DC charger, battery backup system, UPS, EV, an electric utility grid. The proposed power circuitry is cost effective, compact in size, easily diagnostic, highly efficient and reliable.

scholarly journals A non‐isolated DC‐DC converter with low voltage stress and high step‐down voltage conversion ratio

2021 ◽  
Author(s):  
Stylianos P. Syrigos ◽  
Georgios C. Christidis ◽  
Theodoros P. Mouselinos ◽  
Emmanuel C. Tatakis
Keyword(s):  
Low Voltage ◽  
Conversion Ratio ◽  
Voltage Stress ◽  
Step Down ◽  
Voltage Conversion

Design and Analysis of a High-Efficiency Two-Phase Interleaved Boost Converter with Modified Conversion Ratio and Low Voltage Stress

2021 ◽  
pp. 2150161
Author(s):  
Mriganka Biswas ◽  
Somanath Majhi ◽  
Harshal Nemade
Keyword(s):  
High Efficiency ◽  
Low Voltage ◽  
Load Condition ◽  
Boost Converter ◽  
Conversion Ratio ◽  
Duty Ratio ◽  
Two Phase ◽  
Voltage Stress ◽  
Interleaved Boost Converter ◽  
In Series

The paper presents a two-phase interleaved boost converter (IBC) providing higher step-up conversion ratio compared to the conventional IBC. The circuit consists of a crossly connected diode-capacitor cell which provides the extra boost up. The two identical capacitors of the cell are charged in parallel and discharged in series providing high voltage gain at considerably low duty ratio. Switching operations, ripple and average currents through inductors are analyzed in continuous conduction mode (CCM). Ripple in input current is also improved. The voltage stress across the semiconductor devices is less in the proposed converter. Also, boundary load condition is derived. Small-signal modeling is carried out and a control circuit is enabled in the voltage mode control framework. Power losses are analyzed and 96.53[Formula: see text] efficiency is achieved. Finally, the proposed converter is designed and implemented, and experimental results are provided.

scholarly journals A Method for Determining Customers’ Energy Shrinkage Cost

2020 ◽  
Vol 8 (3) ◽  
pp. 672
Author(s):  
CONNY KURNIAWAN WACHJOE ◽  
HERMAGASANTOS ZEIN ◽  
SITI SAODAH
Keyword(s):  
Power Flow ◽  
Optimal Power Flow ◽  
Cost Allocation ◽  
Low Voltage ◽  
Equivalent Circuit Model ◽  
Power Losses ◽  
Network Efficiency ◽  
Loss Allocation ◽  
Cost Of Energy ◽  
The Cost

ABSTRAKPenyusutan energi adalah salah satu komponen biaya-biaya listrik yang harus dibayar oleh pelanggan-pelanggan pada tegangan sistem dari jaringan yang berbeda, jaringan tegangan tinggi, sedang dan rendah. Meskipun biaya bahan bakar campuran adalah sama untuk semua pelanggan, alokasi kerugian berbeda untuk setiap jaringan tersebut. Makalah ini mengusulkan suatu metode untuk menentukan alokasi biaya penyusutan energi untuk pelanggan-pelanggan dalam suatu model rangkaian ekivalen, dengan beban dikumpulkan pada setiap jaringan. Formulasi-formulasinya diturunkan untuk  mendapatkan alokasi kerugian yang adil di antara pelanggan-pelanggan berdasarkan hukum-hukum listrik. Hasil simulasi menunjukkan bahwa alokasi biaya penyusutan energi adalah 31%, 33% dan 36% untuk pelanggan tegangan tinggi, sedang dan rendah. Selain itu, efisiensi jaringan akan mempengaruhi total biaya penyusutan energi. Jika perhitungan kerugian daya menggunaka metode Aliran Daya Optimal, maka metoda ini dapat mengurangi kerugian sebesar ±3% atau setara dengan pengurangan biaya penyusutan energi sebesar 16%.Kata kunci: komponen biaya-biaya listrik, tegangan sistem, model rangkaian ekivalen, hukum-hukum listrik, alokasi biaya kerugian energi. ABSTRACTEnergy shrinkage is one component of electrical costs that must be paid by customers on the system voltage in different networks, high, medium, and low voltage networks. Although the fuel-mix costs are flat for all customers, loss allocation is different for each network. This paper proposes a method for determining the cost allocation of energy shrinkage to customers in an equivalent circuit model, with the loads collected for each network. Formulations are derived to get a fair allocation of losses among customers based on electric laws. The simulation results show that the cost allocation of energy shrinkage is 31%, 33%, and 36% for high, medium, and low voltage customers. Besides, network efficiency will affect the total cost of energy shrinkage. If power losses calculation uses the Optimal Power Flow method, it can reduce power losses by ±3% or equivalent to a reduction in the cost of energy shrinkage of 16%.Keywords: component of electrical costs, system voltage, eqivqlent sircuit model, electric laws, cost allocation of energy shrinkage

Angular Resolved Electron Spectroscopy with Parallel Recording

1990 ◽  
Vol 48 (2) ◽  
pp. 370-371
Author(s):  
Huang Min ◽  
P.S. Flora ◽  
C.J. Harland ◽  
J.A. Venables
Keyword(s):  
Electron Spectroscopy ◽  
Low Voltage ◽  
Solid Angle ◽  
Detection System ◽  
Voltage Electron ◽  
Cylindrical Mirror ◽  
Inner Radius ◽  
Channel Plate ◽  
And Performance ◽  
Type Detector

A cylindrical mirror analyser (CMA) has been built with a parallel recording detection system. It is being used for angular resolved electron spectroscopy (ARES) within a SEM. The CMA has been optimised for imaging applications; the inner cylinder contains a magnetically focused and scanned, 30kV, SEM electron-optical column. The CMA has a large inner radius (50.8mm) and a large collection solid angle (Ω > 1sterad). An energy resolution (ΔE/E) of 1-2% has been achieved. The design and performance of the combination SEM/CMA instrument has been described previously and the CMA and detector system has been used for low voltage electron spectroscopy. Here we discuss the use of the CMA for ARES and present some preliminary results.The CMA has been designed for an axis-to-ring focus and uses an annular type detector. This detector consists of a channel-plate/YAG/mirror assembly which is optically coupled to either a photomultiplier for spectroscopy or a TV camera for parallel detection.

REDUCTION OF ACTIVE POWER LOSSES IN LOW VOLTAGE NETWORKS WITH THE RECTIFIER LOAD

2017 ◽  
Vol 2017 (3) ◽  
pp. 65-70
Author(s):  
A.F. Zharkin ◽  
◽  
V.A. Novskyi ◽  
N.N. Kaplychnyi ◽  
A.V. Kozlov ◽  
...  
Keyword(s):  
Low Voltage ◽  
Active Power ◽  
Power Losses ◽  
Active Power Losses
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