This paper analyses two schemes of single-stage diode-switched active filters used in new switching power supplies designs to improve the power factor. From the point of view of the power flow, the distortion reduction is based on the improvement of the power conversion processes. Most of the ca/cc switching power supplies consists of two separated parts: a rectifier – in most cases a diode bri...

Auxiliary power supplies are required to have low standby power consumption at light-load conditions. These power supplies also require features such as low cost, high efficiency, and a Line Under-Voltage Lockout (UVLO) function to detect the input voltage so the main power supply does not operate at low input voltage ranges. Fairchild’s FSQ510 has been specifically designed for low standby pow...

Estimation of Productivity in Korean Electric Power Plants: A Semiparametric Smooth Coefficient Model This paper analyzes the impact of load factor, facility and generator types on the productivity of Korean electric power plants. In order to capture important differences in the effect of load policy on power output, we use a semiparametric smooth coefficient (SPSC) model that allows us to mode...

Abstract We present a high-flux source of cold ytterbium atoms that is robust, lightweight and low-maintenance. Our apparatus delivers 1 × 10 9 s −1 into 3D magneto-optical trap without requiring water cooling or high current power supplies. achieve this by employing Zeeman slower 2D fully based on permanent magnets in Halbach configurations. This strategy minimizes mechanical complexity, stray...

Original scientifica paper Recently, there has been an increasing interest in using distributed generators (DG) not only to inject power into the grid, but also to enhance the power quality. In this study, a space voltage pulse width modulation (SVPWM) control method is proposed for a synchronous grid-connected controller in a wind-solar-storage micro grid. This method is based on the appropria...

The inherent performance advantage of power MOSFETs makes their use very attractive in switched mode power supplies. The fundamental advantage of the power MOSFET is the operation at fast switching speeds and high frequencies. Higher operating frequency allows further reduction in the size of the filter and magnetic components. The recent introduction of Fairchild Semiconductor’s QFET power MOS...

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