November 7th, 2008
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Abstract We studied EL properties of organic light-emitting diodes using a semi-transparent metal anode and conductive polymer instead of indium tin oxide. A metal anode and conductive polymer are thought to be more suitable for flexible organic light-emitting diodes than indium tin oxide. We fabricated organic light-emitting diodes using a semi-transparent metal anode and conductive [...]
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Abstract The commercial potential of small format, bright, low power consumptialn displays drives Kodak’s investment in thin-film, low-molecular weight organic electroluminescenl devices. The prototypical small-molecule organic light emitting diode (OLED) consists of a transparent hole-injecting electrode, indium tin oxide (ITO), followed in sequence by the hole-transport layer :N,N-bis( 1 -Naphthyl)-N,N’- bis(pheny1)benzidine (abbreviated NPB), the electron [...]
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Abstract THE SUPERIORITY OF LIGHT-EMITting diodes (LEDs) over incandescent lights, due to long life expectancy, high tolerance to humidity, low power consumption, and minimal heat generation, is well supported. LEDs are used in message display boards, signal devices, and many other means of illumination. One important characteristic of LEDs is that they are semiconductor devices [...]
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Abstract In this paper, we propose the wireless optical communication system with white colored LEDs for wireless home link (WHL). The white colored LEDs have a high power output and are regarded as lamps for the next generation. In the proposed system, this device is used for wireless home link. The proposed system is suitable [...]
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Abstract The paper presents a way of solving the electromagnetic interference (EMI) problem for an electric power system with power line communication, supplied from an autonomous power source. Theoretical results include a mathematical model of the system with power line communication derived from the recently introduced multi-phase bridge-element concept. Numerical experiments are performed in two [...]
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Abstract Power line noise is known to affect the performance of broadband power-line communications significantly. This paper presents a frequency-domain approach to characterize and model the statistical variation of power-line noise. The model considers both the background noise and the impulsive noise. The background noise model is based on statistical analysis of the results from [...]
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Abstract A new hybrid fuzzy controller for direct torque control (DTC) induction motor drives will be presented in this paper. The newly developed hybrid fuzzy control law consists of proportional-integral (PI) control at steady state, PI-type fuzzy logic control at transient state, and a simple switching mechanism between steady and transient states, to achieve satisfied [...]
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Abstract Fuzzy Logic control is considered for speed of wound rotor induction motors with slip energy recovery. The speed is limited at some range of sub-synchronous speed of the rotating magnetic field. Control speed by adjusting resistance value in the rotor circuit that occurs the efficiency of power are reduced, because of the slip energy [...]
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Abstract This paper presents an application of fuzzy logic control to the distributed collector field of a solar power plant. The major characteristic of a solar power plant is that the primary energy source, solar radiation, cannot be manipulated. Solar radiation varies throughout the day, causing changes in plant dynamics and strong perturbations in the [...]
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Abstract This paper presents an application of a fuzzy logic control scheme for switched series capacitor modules to enhance overall stability of electric power systems. Through the signal conditioning of the measured real power flow at the location of the series capacitor modules, the phase/speed state of the electric power system is obtained to determine [...]
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Abstract A non-destructive estimation of the state-of-charge SoC. of batteries facilitates optimum utilization of the battery for a given application, as well as evaluation of its state-of-health. Among various methods, a.c. impedance spectroscopy over a wide range of frequencies provides a variety of parameters which are functions of the SoC of a given battery. These [...]
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Abstract A new method is presented that is capable of resolving the parameters in a double-exponential model with which the electrical characteristics of a crystalline-silicon solar cell are analysed. This method gives not only opencircuit voltage, short-circuit current, fill factor and efficiency, but also diode saturation currents, light-generated current, series resistance and shunt resistance, all [...]
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