scholarly journals The Influence Factor Analysis of Symmetrical Half-Bridge Power Converter through Regression, Rough Set and GM(1,N) Model

Axioms ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 18
Author(s):  
Shih-Kuen Changchien ◽  
Kun-Li Wen
Keyword(s):  
Rough Set ◽  
Power Converters ◽  
Influence Factor ◽  
Power Conversion ◽  
Power Converter ◽  
Conversion Ratio ◽  
Efficiency Improvement ◽  
Affecting Factors ◽  
Output Efficiency ◽  
Voltage Conversion

Analysis of power converter performance has tended to be engineering-oriented, focusing mainly on voltage stability, output power and efficiency improvement. However, there has been little discussion about the weight relations between these factors. In view of the previous inadequacy, this study employs regression, rough set and GM(1,N) to analyze the relations among the factors that affect the converter, with a symmetrical half-bridge power converter serving as an example. The four related affecting factors, including the current conversion ratio, voltage conversion ratio, power conversion ratio and output efficiency, are firstly analyzed and calculated. The respective relative relations between output efficiency and the other three factors are obtained. This research can be referred to by engineers in their design of symmetrical half-bridge power converters.

Theoretical Analysis of Prospects of Organic Photovoltaics as a Multi-Functional Solar Cell and Laser Power Converter for Wireless Power Transfer

2020 ◽  
Vol 20 (8) ◽  
pp. 4878-4883
Author(s):  
Premkumar Vincent ◽  
Jaewon Jang ◽  
In Man Kang ◽  
Philippe Lang ◽  
Hyeok Kim ◽  
...  
Keyword(s):  
Laser Power ◽  
Power Converters ◽  
Power Conversion ◽  
Wireless Power Transfer ◽  
Power Converter ◽  
Potential Candidate ◽  
Power Transfer ◽  
Wireless Power ◽  
Power Harvesting ◽  
Single Junction

Few reports have researched on utilization of laser power conversion systems for wireless power transfer in aeronautical applications. III–V compound semiconductors are commonly used as photovoltaic (PV) power converters in the previous studies. We propose the prospects of using organic absorbers as PV power converters. For laser power conversion to be applied for portable devices, the PV module should be easily processable, thin, low-weight, and printable on flexible substrates. Organic PVs provide all the above advantages, and thus, could serve as a potential candidate for laser power harvesting applications. Moreover, they can also be made transparent, which could be utilized in power harvesting lamination coatings and windows. We had simulated the possibility of using single-junction and tandem photovoltaic structures for 670 nm and 850 nm laser power harvesting. FDTD simulations were conducted to optimize the PV structure in order to maximize the absorption at the laser wavelengths. A maximum PCE of 16.17% for single-junction PV and 24.85% for tandem PV was theoretically obtained.

scholarly journals Improvement of Static Voltage Gain of a Non-Isolated Positive Output Single-Switch DC-DC Converter Structure Using a Diode-Capacitor Cell

2021 ◽  
Vol 8 (4) ◽  
pp. 583-590
Author(s):  
D. Murali ◽  
S. Annapurani
Keyword(s):  
High Voltage ◽  
High Gain ◽  
Power Converter ◽  
Conversion Ratio ◽  
Voltage Gain ◽  
Dc Voltage ◽  
Energy Applications ◽  
Input Side ◽  
Voltage Conversion ◽  
Capacitor Cell

There are different low switching stress non-isolated DC-DC power converter structures developed for Photo-Voltaic (PV) applications with a view to achieve high voltage conversion ratio. The work proposed in this research article investigates the performance analysis of a coupled inductor and diode-capacitor multiplier cell based non-isolated high gain single-switch DC–DC conversion scheme with a single-ended primary-inductor on the input side. The presented converter suitable for renewable energy applications has the merits such as continuous input current, high voltage conversion ratio, and reduced voltage stress across the power switch. The multiplier cell consisting of two diodes and two capacitors is mainly used to enhance the converter output voltage level. A MATLAB / SIMULINK model of the suggested topology has been developed to validate its performance. During the simulation of the converter, a DC voltage of 50 V was given at the input side. The load end received a DC voltage of approximately 900 V. Thus, through this study, it was found that the addition of diode-capacitor cell can significantly improve the static gain of the suggested converter. The findings of this research may serve as a base for future studies on improvement of voltage gain of DC-DC converters.

scholarly journals A Wide Voltage-Ratio Dual-Output DC Converter for Charging Series-Connected Batteries

Energies ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1650
Author(s):  
Yu Lin Juan
Keyword(s):  
Power Conversion ◽  
Input Voltage ◽  
Conversion Ratio ◽  
Design Criteria ◽  
Voltage Range ◽  
Voltage Ratio ◽  
Operation Stability ◽  
Step Down ◽  
Voltage Conversion ◽  
Conduction Mode

In this study, a dual-output converter with a wide input voltage range is proposed for directly equalized charging of series-connected batteries without additional power conversion losses. Compared with most of the equalized charging topologies, such as the those with a multi-winding transformer or voltage multiplier, the proposed converter could be applied to different voltage conversion ratio applications. The proposed converter is capable not only of step-down but also step-up/down power conversions for different input voltage levels. By operating in discontinuous conduction mode, the diode reverse recovery losses can be eliminated and operation stability can also be enhanced. The operation principles and design criteria are both illustrated. A prototype of charging two series-connected LiFePO4 batteries is constructed. Corresponding experimental results of different input voltage levels are provided to verify the performance and validity.

scholarly journals Gate Drives generating EMI in the absence of Power Converter loading

2021 ◽  
Author(s):  
Arnold de Beer
Keyword(s):  
Low Power ◽  
Electromagnetic Interference ◽  
Power Converters ◽  
Power Conversion ◽  
Power Converter ◽  
Load Current ◽  
Conducted Emission ◽  
Absence Of Power ◽  
Gate Drives

This paper shows how a power converter can generate electromagnetic interference (EMI) through the operation of gate drives only - in the absence of any power conversion. This is due to parasitic capacitances connecting the power semiconductor’s gate to the main circuit. A half bridge converter is used to illustrate this concept. Practical measurements are compared to simulations for an energized and non-energized converter. Even without loading, a converter can exceed regulatory conducted emission EMI limits. This effect is important to consider during the design of converter EMI mitigation - especially for low power converters where the load current is not dominant.

scholarly journals Gate Drives generating EMI in the absence of Power Converter loading

2021 ◽  
Author(s):  
Arnold de Beer
Keyword(s):  
Low Power ◽  
Electromagnetic Interference ◽  
Power Converters ◽  
Power Conversion ◽  
Power Converter ◽  
Load Current ◽  
Conducted Emission ◽  
Absence Of Power ◽  
Gate Drives

This paper shows how a power converter can generate electromagnetic interference (EMI) through the operation of gate drives only - in the absence of any power conversion. This is due to parasitic capacitances connecting the power semiconductor’s gate to the main circuit. A half bridge converter is used to illustrate this concept. Practical measurements are compared to simulations for an energized and non-energized converter. Even without loading, a converter can exceed regulatory conducted emission EMI limits. This effect is important to consider during the design of converter EMI mitigation - especially for low power converters where the load current is not dominant.

scholarly journals EMC Component Modeling and System-Level Simulations of Power Converters: AC Motor Drives

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1568
Author(s):  
Bernhard Wunsch ◽  
Stanislav Skibin ◽  
Ville Forsström ◽  
Ivica Stevanovic
Keyword(s):  
Power Converters ◽  
Filter Design ◽  
Magnetic Coupling ◽  
Power Converter ◽  
System Level ◽  
Noise Propagation ◽  
Ac Motor ◽  
Input Side ◽  
Indispensable Tool ◽  
Set Up

EMC simulations are an indispensable tool to analyze EMC noise propagation in power converters and to assess the best filtering options. In this paper, we first show how to set up EMC simulations of power converters and then we demonstrate their use on the example of an industrial AC motor drive. Broadband models of key power converter components are reviewed and combined into a circuit model of the complete power converter setup enabling detailed EMC analysis. The approach is demonstrated by analyzing the conducted noise emissions of a 75 kW power converter driving a 45 kW motor. Based on the simulations, the critical impedances, the dominant noise propagation, and the most efficient filter component and location within the system are identified. For the analyzed system, maxima of EMC noise are caused by resonances of the long motor cable and can be accurately predicted as functions of type, length, and layout of the motor cable. The common-mode noise at the LISN is shown to have a dominant contribution caused by magnetic coupling between the noisy motor side and the AC input side of the drive. All the predictions are validated by measurements and highlight the benefit of simulation-based EMC analysis and filter design.

Sign in / Sign up

Export Citation Format

Share Document