Kikuchi-Fujimoto Disease

Soedibyo, Soepardi

doi:10.13181/mji.v14i2.178

Cited by 4 publications

(4 citation statements)

References 18 publications

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“…There are many reviews and comparisons of DC-DC converters [25][26][27]. However, we have only found two articles that include both Sheppard-Taylor and Cuk converters [28,29].…”

Section: Introductionmentioning

confidence: 99%

A Critical Comparison of the Cuk and the Sheppard–Taylor Converter

Alvarez-Diazcomas

Rodríguez‐Reséndiz

Carrillo-Serrano

et al. 2023

WEVJ

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The use of and interest in renewable energy have increased in recent years due to the environmental impact of the technologies currently used to generate electricity. Switched converters play a fundamental role in renewable energy systems. The main goal is to manipulate the output signal of the renewable energy source to meet the requirements of different loads. Therefore, the increase in research on renewable energy sources has resulted in an increase in studies on switched converters. However, many DC–DC converters can be used in a particular application, and there is no clear guidance on which converter to use. The choice of whether to use one converter over another is highly reliant on the expertise of the researcher. Two examples of DC–DC converters are the Sheppard–Taylor converter and the Cuk converter. In this work, a critical comparison is made between these converters. The parameters considered in this comparison are the number of components, gain, stress on parts, and others. The simulation results were obtained to evaluate the performance of the converters in different scenarios. Finally, we conclude that the only application for which the use of the Sheppard–Taylor converter is justified are those that require high specific power and power density.

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“…There are many reviews and comparisons of DC-DC converters [25][26][27]. However, we have only found two articles that include both Sheppard-Taylor and Cuk converters [28,29].…”

Section: Introductionmentioning

confidence: 99%

A Critical Comparison of the Cuk and the Sheppard–Taylor Converter

Alvarez-Diazcomas

Rodríguez‐Reséndiz

Carrillo-Serrano

et al. 2023

WEVJ

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“…The Boost converter has some advantages like its simplicity, reduced number of components, and simple control system, regarding Buck-Boost, Cuk, Zeta/Sepic, and Sepic/Zeta. Meanwhile, these last three converters stand out due to their capacity of operating as step-up or step-down converters and lower input (Cuk and Sepic/Zeta) or output (Zeta/Sepic) current and voltage oscillations regarding the Boost converter [16]. Nevertheless, these four converters (Boost, Buck-Boost, Cuk, Zeta/Sepic, Sepic/Zeta) have limited voltage gains; consequently, v b must be close to v bus , which is achieved by connecting batteries in series.…”

Section: Introductionmentioning

confidence: 99%

Double Adaptive PI-Structure for Regulating a Microgrid DC Bus Using a Flyback-Based Battery Charger/Discharger Converter

2022

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DC microgrids are composed of loads, renewable sources, and storage devices that require control and protection to operate safely. The flyback converter is an alternative to connect paralleled batteries with nominal voltage DC buses; however, until now, complex controllers have been proposed, making difficult their implementation. On the other hand, when the voltage of a DC microgrid is not properly controlled, the loads may be damaged due to the voltage outside of the safe range. Therefore, proposed in this paper are two adaptive PI-structures to control a battery charger based on a flyback converter to be used in DC microgrids. The first adaptive current controller regulates the magnetizing current for stabilizing the system, and the second adaptive voltage controller regulates the voltage of the DC bus to protect the elements of the microgrid. The methodology to design the adaptive parameters of the PI-structures is developed as follows: first, the power stage of the flyback converter is introduced to derive a control-oriented model. The battery and the DC bus of the microgrid, which are interfaced by the flyback converter, are represented with widely accepted approaches. The second step is focused on modeling the system. The flyback converter, which includes a capacitance to model the DC microgrid, is represented by a dynamic model. The differential equations are averaged, and several transfer functions of the main variables are obtained. In the third step, the transfer functions are used to design the PI adaptive current controller and the PI adaptive voltage controller. In the last step, several recommendations are made to implement the power and control stages in low-cost hardware. An application example with realistic parameters is carried out in PSIM to validate the controller loops design. A battery of 12 V is connected to a DC microgrid of 48 V through a flyback converter with a switching frequency of 50 kHz. The settling time and deviation of the DC microgrid voltage, after a perturbation, are 0.845 ms and 2.04 V respectively, while the maximum values are adjusted to be 1 ms and 2.4 V. The simulation results validate the proposed procedure and the effectiveness of the PI-structures in regulating the magnetizing current and the DC bus voltage.

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“…Another structure with a reduced input current ripple and higher step-up capabilities is presented in [44]. In [45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60], different structures of nonisolated SEPIC converters with some examples of design, analysis and control are presented. In [61], the classical SEPIC with isolation is presented, analyzed, and implemented.…”

Section: Introductionmentioning

confidence: 99%

A New SEPIC-Based DC-DC Converter with Coupled Inductors Suitable for High Step-Up Applications

2021

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In this paper, a new hybrid SEPIC dc-dc converter with coupled inductors suitable for photovoltaic applications is presented. First, how the new topology was derived will be presented, continuing with its analysis and design equation as a standalone dc-dc topology. The analysis will consist of a steady-state equations derivation, a static conversion ratio calculation based on which the semiconductor voltage and current stresses are evaluated and states the continuous conduction mode (CCM) operation conditions. The converter will then be simulated as a first validation of the theory using the dedicated Caspoc power electronics package. To finally validate the theoretical design, a prototype will be built in order to practically demonstrate the feasibility of the proposed solution and to reveal its main practical features and limitations. A comparative study to several other similar topologies will be carried out to identify its most desirable feature. Finally, an application of the new hybrid converter will consist of a complete solar energy conversion system using a photovoltaic panel. The maximum power point tracking (MPPT) algorithm will be elaborated. The solar system together with the MPPT will first be modeled, then simulated and practically implemented and tested.

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Kikuchi-Fujimoto Disease

Abstract: Kikuchi-Fujimoto disease (KFD) was first reported by 2 Japanese pathologists, Kikuchi and Fujimoto, independently in 1972

Cited by 4 publications

References 18 publications

A Critical Comparison of the Cuk and the Sheppard–Taylor Converter

A Critical Comparison of the Cuk and the Sheppard–Taylor Converter

Double Adaptive PI-Structure for Regulating a Microgrid DC Bus Using a Flyback-Based Battery Charger/Discharger Converter

A New SEPIC-Based DC-DC Converter with Coupled Inductors Suitable for High Step-Up Applications

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