The LM27402 is a synchronous voltage mode DC/DC buck controller with inductor DCR current sense capability. Sensing the inductor current eliminates the need to add resistive powertrain elements which increases overall efficiency and facilitates accurate continuous current limit sensing. A 0.6V ±1% voltage reference enables high accuracy and low voltage capability at the output. An input operati...

This study aimed at indexing crash worthiness capability of 20 most frequently used car brands in Iran. Since rollover crashes are one of the most important crash types due to their high impact on crash severity, they were chosen as the case study of the current research. In this regard, the data of 42,118 rollover crashes of urban and rural roads of Iran which occurred from 2009 to 2012 was us...

One of the most important case in humanoid robot designing is hand, which it consider as an country development. High percentage of robot work quality depend on hand capability. A robot function increase with hand movement. One of important movement in artificial hand capability relate to fingers lateral movement. This case has more effect intake of special objects such as round shape or moving...

The single-phase transformerless grid-connected photovoltaic (PV) systems, mainly the low-power single-phase systems, require high efficiency, small size, lightweight, and low-cost grid-connected inverters. However, problems such as leakage current, the DC current injection and safety issues are incorporated with transformerless grid-connected PV inverters. Besides, the new standards such as Lo...

Software Process Improvement (SPI) ‘best practice’ models such as ISO 9000 and the Capability Maturity Model Integrated (CMMI) have been developed to assist software development organisations by harnessing their experience and providing them with support so that they can produce software products on time, within budget and to a high level of quality. However there is increasing evidence that th...

Although fertility capability classification (FCC) has high performance in land evaluation and soil maps interpretation, so far it has been less attended in land evaluation studies. Therefore, qualitative (FCC method) and quantitative (Riquer index) land fertility capability evaluation for Wheat and Rice cultivation and comparison of Soil Taxonomy and WRB classification with FCC were chosen as ...

The purpose of this study is to provide a model with a dynamic system method to investigate the factors affecting the technological capabilities enhancement in the high-tech industries of high-speed train of the rail transportation system. For this purpose, after reviewing the literature and conducting several meetings with experts in the rail transportation industry, a conceptual and qualitati...

This paper presents a vector current controller (in the synchronous reference, or dq, frame) with negative-sequence injection capability for three-phase grid-connected converters. is desired operation of converter during unbalanced conditions and also certain type islanding detection. The proposed first determines double-frequency references then uses sixth-order two-input two-output proportion...

This paper reports on the measured dc characteristics of a SiC JFET device from room temperature up to 450◦C in order to evaluate the device’s capability for high-temperature operation. The authors packaged SiC JFET bare die into a dedicated high-temperature package to be able to perform experiments under extremely high ambient temperatures. The experimental results show that the device can ope...

We present an algorithm for compressible Large Eddy Simulation (LES) using unstructured tetrahe-dral grids. Two methods for simulation of the sub-grid scale stresses are examined. The rst method is the Monotone Integrated Large Eddy Simulation (MILES) technique of Boris, Oran and Grinstein, whereby the energy transfer from the resolved scales to the subgrid scales is modeled using the inherent ...