Papers by Keyword: SMPS

Abstract: Retracted paper: In recent years, much research has been devoted to the analysis of 128 bit architectures; on the other hand, few have evaluated the construction of wide-area networks. In fact, few cyberneticists would disagree with the understanding of IPv6. This is an important point to understand. we describe an autonomous tool for developing compilers, which we call ADZ.

Abstract: The rapidly increasing usage of high-powered devices and the high specification in personal and industrial/medical devices has led to a greater demand for a SMPS for high-powered devices. A stable and reliable power source for such devices and research on power quality monitoring systems are needed. To these ends, this paper introduces a SMPS monitoring system based on ZigBee communication. The SMPS monitoring system uses ZigBee to collect the voltage, current, and temperature data from SPMS in real time. The collected data are visually synchronized and the current power supply status is displayed to the operator. In addition, to prevent any decline in the quality of the power, the system gives feedback via smartphone to the operator if errors are detected.

Abstract: Advances in scientific research in the field of nanotechnology sparked an increase in technological and industrial applications involving nanoparticles, Moreover, there was increasing concern about the control of nanoscale particles released to the atmosphere, driven by concerns over air quality and human health. In this context, this study aims to determine the size distribution of TiO₂ nanoparticles generated by the commercial TSI Atomizer Aerosol Generator model 3079 for different solution concentrations and air flow rates. The concentrations of the TiO₂ solutions used in the generator were 0.0125, 0.025 and 0.05 g.L^-1, while the aerosol flow rates were 1.27, 2.55 and 3.82 L.min^-1. The size distribution was measured with the TSI Scanning Mobility Particle Sizer (SMPS) equipment, which provides the number of particles per size range. The results showed that even changing the concentration of TiO₂ in solution, peak concentrations of nanoparticles remained in the same range between 15 to 45 nm. Moreover, it was observed that particle concentration in the gas stream decreased with increasing flow rate.

Abstract: This paper proposes a new estimation for the eddy-current loss of MnZn ferrite cores. The eddy-current loss plays a critical role in the frequency range of 100-500 kHz, whereas the amount of the hysteresis loss dominates the core loss of magnetic devices below 100 kHz. However, the definition and calculation of eddy-current loss are not as easy or accurate. In the proposed estimation, the equivalent electrical circuit method is conducted for determining the grain conductivity and the driving current to replace the induced magnetic flux density in order to simplify measurement. The related electrical and magnetic characteristics are measured by an HP-4294 impedance analyzer. Finally, an EI30 (PC40 material system from TDK) MnZn ferrite core is used as an example to prove that this model can effectively estimate the eddy-current loss of MnZn ferrite cores at different frequencies and driving currents

Abstract: This SiC diodes and switches provide greatly enhanced performance at higher operating voltage, but the base material provides a high barrier to adoption in commercial systems. Commercial adoption has not occurred by adopting SiC components in place of Si devices, but only when the characteristics of SiC components can successfully leverage system performance and cost. Doing so requires a close look at current roadblocks and examining topologies and techniques that can bring more optimal system performance (density, efficiency, cost) with SiC components. High density converters using conventional components are becoming limited by the volume and cost of passive components, particularly the EMI filters and bulk filter capacitors. To address this and demonstrate the performance capabilities of SiC in SMPS, a PWM isolation converter is proposed using the resonant reset forward converter in an interleaved configuration. This topology can extend energy recovery from the primary bulk bus capacitor used for hold up time, as well as minimizing filtering requirements for input and output capacitors. The interleaved converter is developed from cascode switches using experimental SiC JFETs, in a configuration derived from previous work with a single switch converter. Overall performance as well as design issues will be discussed.