In this paper, a robust adaptive nonlinear dynamic controller is designed to achieve practical stabilization for position tracking error of a voltage-fed permanentmagnet stepper motor. The control design is an outputfeedback design that utilizes only rotor position and velocity measurements. Currents are not available for feedback. Adaptations are utilized so that no knowledge of motor paramete...

This Paper presents the orientation procedure for diagnosing the power quality problems in different fault occurring conditions by using Distribution STATCOM (DSTATCOM) with linear loads. Here the resistance switching is used to get the pure sinusoidal voltage compensation. This modelling and simulation of D-STATCOM is achieved by using pure sinusoidal Pulse Width Modulation Technique. The majo...

This paper proposed a new approach to achieve full characteristic of highly non-linear current density–electric field (J-E) curve, which depends on various key factors in terms filler concentration, temperature, input voltage level, and structuration ZnO particles (i.e. aligned or randomly dispersed). The homogeneity particle distribution within the polymer matrix, together with chain-like stru...

The brushless doubly-fed machine (BDFM) has two stator windings with different pole numbers, supplied frequencies. Therefore, the distribution of magnetic fields in and rotor iron is complex. In addition, flux density non-sinusoidal a DC offset at natural speed. This makes use conventional hysteresis models utilised for sinusoidal impractical BDFM. this paper new model proposed BDFM based on sc...

In this experiment effect of two full and half width sinusoidal inner tubes in triplex-tube heat exchanger with phase change material (PCM) was investigated. Length and diameter of the tubes have been chosen such that the area of each tube to be the same. Charging and discharging processes were carried out by inner tube, outer tube and both. Results indicated, PCM melting and solidification tim...

In this contribution we describe the results of a study into the thermal and thermo-mechanical behavior of a high temperature micro gas reactor for investigation of the intrinsic reaction kinetics of rhodium-catalyzed direct catalytic partial oxidation (CPO) of methane into synthesis gas. The chip comprises a flow channel etched in silicon, capped with a thin composite membrane of heavily boron...

The performance of a solid oxide fuel cell (SOFC) was examined using 3D computational fluid dynamics to model mass and heat flows inside the channels. In present investigation, SOFC with new flow field based on sinusoidal has been studied. latter tested compared single ANSYS FLUENT. obtained results showed that at given operating voltage, maximum power for fields were 1.43 1.35 W/cm 2 , respect...