Stringent emission regulations around the world necessitate the use of high-efficiency catalytic converters in vehicle exhaust systems. Experimental studies are more expensive than computational studies. Also using computational techniques allows one to obtain all the required data for the Catalytic Converter, some of which could not be measured. In the present work, Geometric modeling ceramic ...

Abstract: This paper deals with asymmetric multilevel converter with a single source that can produce greater amount of output voltage waveforms with a reduced number of power electronic components. The power electronic switches play a very important role in designing a multilevel converter because they define the cost, installation area, circuit size and complexity. MOSFETs are used as switche...

At present, electrical network stability is of the utmost importance because increase in electric demand and integration distributed generation deriving from renewable energy. In this paper, we proposed a static reactive power compensator model with common direct current voltage sources. Converter parameters were calculated designed to fulfill specifications. order ascertain device response for...

Sparse wavelength conversion and appropriate routing and wavelength assignment (RWA) algorithms are the two key factors in improving the blocking performance in wavelength-routed all-optical networks. It has been shown that the optimal placement of a limited number of wavelength converters in an arbitrary mesh network is an NP-complete problem. There have been various heuristic algorithms propo...

This brief investigates the use of prior knowledge in the parameter estimation of NARMAX polynomial models. The problem of parameter estimation is then formulated in such a way that the estimated models have specified features. This formulation results in a constrained optimization problem, which is solved using the ellipsoid algorithm. This technique is applied to a real dc–dc Buck converter. ...

This paper presents a new integral control law for a boost converter that ensures the stability of large-signal operation. The integral controller is derived in two steps by means of passivitybased control theory. First, a static law, which ensures global stability, is obtained. Secondly, a combination of the storage function of this static law and a new positive semidefinite storage function r...

The static and dynamic characteristics of buck-type three-phase pulse-width-modulation (PWM) rectifier are fully analyzed based on the dc and ac circuit models developed by the circuit DQ transformation. Various static converter characteristics such as gain, real and reactive power, power factor, and unity power factor conditions are completely analyzed. Transition characteristics are also anal...

In this letter a histogram-based BIST (Built-In Self-Test) approach for deriving the main characteristic parameters of an ADC (Analog to Digital Converter) such as offset, gain and non-linearities is proposed. The BIST uses a ramp signal as an input signal and two counters as a response analyzer to calculate the derived static parameters. Experimental results show that the proposed method reduc...

In this work, a zero static error proportional controller for a two-cell DC-DC buck converter is synthesized and analyzed. Under a traditional proportional control scheme, the system presents a constant error of the current supplying the output load. As the proportional feedback gain is increased, the average static error decreases. However, sub-harmonic oscillations and chaotic behavior emerge...