Precision tests verify the dc equivalent circuit used by Ricketts and Kemeny to describe a quantum Hall effect device in terms of electrical circuit elements. The tests employ the use of cryogenic current comparators and the double-series and triple-series connection techniques of Delahaye. Verification of the dc equivalent circuit in double-series and triple-series connections is a necessary s...

In this paper, a feasibility study of shuntless coulomb counting method for estimating the state charge (SOC) battery is presented. Contrary to conventional counting, proposed does not require an external resistive shunt; it instead only requires voltage measurements performed on under test while operating. The current measured indirectly using battery’s equivalent series resistance (ESR). cons...

Supercapacitor aging is mainly related to thermal and voltage constraints. This aging causes degradation in the supercapacitor performances which can lead to the failure of this component. To avoid this failure, it is necessary to determine the supercapacitor state of health. The aim of this study is the supercapacitor diagnosis. In this paper, aging tests of supercapacitor subjected to calenda...

Reduced equivalent series resistance (ESR) is necessary, particularly at a high current density, for high performance supercapacitors, and the interface resistance between the current collector and electrode material is one of the main components of ESR. In this report, we have optimized chemical vapor deposition-grown graphene (CVD-G) on a current collector (Ni-foil) using reduced graphene oxi...

This document presents a method of on-line fault diagnosis for iron core of induction motor stator based on adaptive observer. Due to the equivalent resistance is directly affected by the stator core fault, while the iron loss is considered in the series iron loss model of the induction motor, so we can determine the core fault state by identifying equivalent iron consumption resistance. In thi...

Power electronic converters are an important element in the interaction between source and load. In fact, failures this system often lead to bigger problems. Therefore, it is necessary monitor converter components that have most failures. work, we present estimation of three parameters, which are, turn, degradation indicators power converters: equivalent series resistance, capacitance on-state ...