Background: Worldwide Intra-Uterine Growth Restriction carries out high rate of fetal and neonatal morbidity and mortality. Perinatal mortality rates are 4-8 times higher for growth-retarded infants. IUGR are subdivided into symmetrical and asymmetrical subtypes. Aim of Study: To focus on the actual incidence of each subtype of IUGR and disparities. Methods: Across-sectional descriptive study a...

Power quality difficulties arise as a result of Renewable Energy Sources (RES) integrating with the grid. Voltage swell, sag, and harmonic distortion occur on grid due to power issues, which have an impact customers. An inexpensive series compensator, like Dynamic Restorer (DVR), is best solution for overcoming aforementioned problems. In this article, solar PV integrated DVR novel multilevel i...

In this paper, a non isolated multi-input multi-output dc–dc boost converter is proposed. This converter is used to implant alternative energy sources in electric vehicles. However, advantages of different sources of energy are achievable by the implant energy sources. This converter has many outputs with different voltage levels, which can be interfaced with multilevel inverters. In this conve...

In this paper a developed symmetric and asymmetric cascaded multilevel inverter is proposed. In asymmetric mode, the values of DC voltage sources are defined in a way that the number of output levels gets more than the condition when the symmetrical DC sources are used. In this regards, to calculate the required magnitudes of DC links several solutions are proposed. It’s obvious that the propos...

The next generation light sources such as energy recovery linac (ERL) light sources and X-ray FEL oscillator require high brightness electron gun with megahertz repetition rate. We have developed a DC photoemission electron gun at JAEA for the Japanese ERL light source project. This DC gun employs a segmented insulator with guard rings to protect the insulator from field emission generated from...

This paper proposes a new solar power generation system, which is composed of a DC/DC power converter and a new seven-level inverter. The DC/DC power converter integrates a DC-DC boost converter and a transformer to convert the output voltage of the solar cell array into two independent voltage sources with multiple relationships. This new seven-level inverter is configured using a capacitor se...

Conventional hybrid vehicles with two energy sources require separate on-board DC/DC converters to connect the battery and fuel cell, which have disadvantages of large size, high cost, losses few applicable operating conditions. To address this situation, paper proposes an optimized integrated converter a non-isolated multi-port scheme that integrates unidirectional port for cell bidirectional ...

MOSFET is the most commonly used devices in DC-DC power converters, and its performance is important to the prognosis and health management of power. The paper proposes a degradation analysis model for MOSFET in DC-DC power converters. A method for detecting the degradation of MOSFET is also introduced. Simulations have shown that the method can predict deterioration in the performance of MOSFE...

High-voltage cascaded H-bridge multilevel (CHBML) inverters usually include many isolated dc voltage sources. Some dc source faults result in a drop in the dc voltage, thereby leading to unequal cell dc voltages. On the other hand, the differences in cell dc source parameters result in unequal dc voltages too. At present, riding through the faults of dc sources and operating under the condition...

The component count for the multilevel inverter has been a research topic last few decades. higher number of power semiconductor devices and sources leads to loss with complex control requirement. A new topology employing concept half-Bridge modules is suggested in this paper. It requires lower dc components. controlled using fundamental frequency switching scheme. With basic unit being able pr...