Equivalent series resistance

About: Equivalent series resistance is a research topic. Over the lifetime, 5335 publications have been published within this topic receiving 83362 citations. The topic is also known as: ESR.

Simple parameter extraction method for non-ideal Schottky barrier diodes

Abstract: Simple, on-site parameter extraction methods are proposed; the ideality factor, series resistance, leakage resistance and saturation current are determined from the current-voltage characteristics of a Schottky barrier diode.

Z-source Dc circuit breakers with coupled inductors

Abstract: This paper considers design details of the z-source breaker. Specifically, the effect of coupled inductors on the z-source breaker is studied. It is shown that the inductor weight can be reduced by 30% and the inductor volume can be reduced by about 25% when coupled inductors are used. Furthermore, the coupling plays a part in the commutation process meaning that the breaker can operate with one capacitor instead of two. These results mean that the major components of the z-source breaker can be greatly reduced. Simulations are carried out to verify the results.

Influence of electrolyte characteristics on the electrochemical parameters of electrical double layer capacitors

Abstract: Electrical double layer capacitors based on ideally polarizable nanoporous carbon electrodes in propylene carbonate with the addition of different 1 M Me3EtNBF4, Me2Et2NBF4, MeEt3NBF4, Et4NBF4, Et3PrNBF4 and Et3BuNBF4 electrolytes have been tested by cyclic voltammetry, chronoamperometry and electrochemical impedance methods. The limits of ideal polarizability, low-frequency limiting capacitance and series resistance, time constant, Ragone plots (energy density vs. power density dependencies) and other characteristics have been discussed. The influence of the electrolyte molar mass on the electrochemical characteristics of the nanoporous carbon electrode cells has been established. The applicability limits of the Srinivasan and Weidner model have been tested.

Equivalent Circuit Analysis of Dye-Sensitized Solar Cell by Using One-Diode Model: Effect of Carboxylic Acid Treatment of TiO2 Electrode

Abstract: For the improvement of dye-sensitized solar cell performance, it is important to analyze the electric mechanism of cells and to employ an effective treatment. Equivalent circuit analysis using a one-diode model was carried out for a dye-sensitized solar cell consisting of a TiO2 electrode treated with carboxylic acid. Carboxylic acid treatment, especially using acetic acid, was effective in increasing the short-circuit current (Isc) of the cell. As a result of the equivalent circuit analysis, the shunt resistance (Rsh) value tended to increase due to carboxylic acid treatment. In contrast, the series resistance (Rs) value of the treated cell was smaller than that of the nontreated cell. Carboxylic acid treatment was effective not only in improving the electrical contact between TiO2 particles but also in blocking the leakage current from the TiO2 surface to electrolyte. Thus, this analytical method using a one-diode equivalent circuit is useful for evaluating the effect of dye-sensitized solar cell treatment.

Improvement in LED circuits, especially for vehicles, signalisation lights and control panels

Abstract: The illumination circuit includes three parallel branches of LEDs forming "i" lines and "j" columns. The network is connected with each branch connected in series and individual LEDs paralleled up, forming a total of "ij" LEDs. Some of the branches have resistors in parallel (22,23). Each LED circuit has a series resistance and zener diode (Ri) placed in series with it.