Power supply technology is a basic technology that supports all types of electronic equipment. Switching power supplies, in particular, are characterized by small size, light weight and high efficiency and are the mainstream technology used in power supplies at present. In recent years, with the advent of an advanced information and communications-oriented society, trends toward personalization...

The Analysis of power supply noise on VLSI chips is becoming important. In this paper we propose a new methodology for the estimation of power supply noise, caused by digital switching activity. Using transfer function calculated hierarchically from Fmatrices, this method makes it possible with dramatically reduced computational cost to estimate power supply noise at all the nodes in power supp...

Objective Preferably (in general) electronic circuitry is energized from a voltage source, i.e., a source for which ideally no current flows under open-circuit conditions. Absent the need to maintain the load current stand-by power dissipation will be minimal. In addition a DC (unipolar constant voltage) power supply virtually always is preferable over an AC supply for electronic equipment. An ...

this paper presents the new topology of three phase on line uninterruptible power supply (ups) by employing t-source inverter (tsi) with maximum constant boost pulse width modulation (pwm) control and the results are compared with the conventional uninterruptible power supply (ups). the conventional ups consists of voltage source inverter (vsi) with step up transformer or dc-dc booster which de...

In order to cope with the increasing leakage power and the increasing device variability in VLSI’s, the required control size of both the space-domain and the time-domain is decreasing. This paper shows the several recent fine-grain voltage engineerings for the low power VLSI circuit design. The space-domain fine-grain voltage engineering includes the fine-grain power supply voltage with 3D-str...

this paper presents a new arc starter circuit that is usable in manual metal arc welding (mma) power supplies. the proposed circuit uses an auxiliary circuit and a series coupling transformer for adding high frequency spikes to output dc voltage during arc striking. the proposed circuit is usable in inverter based arc welding supplies and it could result in a decrease of weigh, volume and expen...

At present the demand of electrical power is growing day by day with a very fast rate, so we require much capable transmission and distribution system with the most excellent quality of supply. That’s why power quality is a major issue in the distribution system and this is the area which attracts all electrical engineers. The major impact of poor quality of supply is on the highly loaded distr...

Bring forward a new analytical method in order to evaluate the stability of the process of aluminum alloy pulsed MIG welding. The ratio of the first and the second peak in arc voltage signal probability density was selected to evaluate aluminum alloy pulse MIG welding stability. By calculating the arc voltage signal probability density from 80 sets of welding experiments, the ratio of the two p...

1 Laboratoire d’Etudes en Géophysique et Océanographie Spatiales (UPS/IRD/CNES/CNRS), Toulouse, France, 2 Laboratoire Atmosphères, Milieux, Observations Spatiales (IPSL/UVSQ/UPMC/CNRS), France, Centre National de la Recherche Météorologique/GAME, Météo France and CNRS, Toulouse, France, 4 Laboratoire de Météorologie Dynamique, Palaiseau, France, 5 Institut Pierre Simon Laplace, Palaiseau, Franc...