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Precise prediction of battery open circuit voltage (OCV) has significant impacts on the battery state estimation and safe operation. Most of the current prediction methods rely on complex data acquisition and parameter identification that requires complicated calculation or modeling. This paper proposed a fast OCV prediction approach based on exponential recovery voltage. Only three voltage values...
The chip (Integrated circuit) is the most complex element on an HF RFID card which is composed of multiple stages and transistors. The communication between the card and reader is achieved through load modulation. This means that the chip changes its load's value from high to low, thus, modifying the matching of the card and the reflection to the reader. We have determined, in an earlier work, the...
Power electronic components such as busbars, capacitors, and inductors are positioned close to each other when designing a high power density converter. Therefore, the internal near field couplings between these components should be considered when designing a low electromagnetic interference (EMI) converter. In this paper, we propose a new frequency domain model for simulation of EMI in power electronic...
This paper proposes a methodology to characterize Compact Fluorescent Lamp (CFL) and Light Emitting Diodes (LED) lamp, based on measurements and simplified circuital models. The methodology relies on voltage and current measurements to estimate unknown parameters of the corresponding circuital model. The parameters estimation adopts linear least-squares and three optimization methods. The obtained...
Electrical impedance characterization is often used to evaluate the electro-mechanical parameters of Capacitive Micromachined Ultrasonic Transducers (CMUTs). Evaluation is achieved by fitting the measured data with simple equivalent circuit models, which do not account for many parasitic phenomena. Such parasitic phenomena may include resistive and inductive behavior of electrical interconnections,...
Electrical impedance characterization represents a practical way to evaluate the electro-mechanical parameters of Capacitive Micromachined Ultrasonic Transducers (CMUTs). This paper describes an accurate CMUT characterization method able to evaluate the electro-mechanical and parasitic parameters by fitting electrical impedance measurements at several bias voltages with an improved equivalent circuit...
In the paper, sudden short-circuit transients at terminals of an autonomous single-phase induction generator were simulated using field-circuit 2D model of the single-phase induction generator. The transients at terminals were calculated for different configurations of capacitors in stator windings. Some experimental results showing re-excitation of the stator voltage after sudden short-circuit at...
This paper reports a new development in relation to a recently published algorithm by the authors [1]. The algorithm iteratively searches for a minimum number of phasor measurement units to be added into a power system to meet a prescribed synchrophasor availability (SA). SA constraints impose a resilience requirement in the face of random interruptions in both power and data transmissions. Our earlier...
In this paper, we model the inductive current clamp (ICC) method described in the ISO 7637-3 standard, where we apply a broadband transient signal as disturbance. To validate the advocated model, a nonlinear device under test (DUT) is simulated, manufactured and measured under the ISO 7637-3 standard test conditions. Furthermore, it is shown that the proposed model can be used to study the DUT's immunity.
This contribution investigates behavioral MOSFET models used for the simulation of conducted and radiated electromagnetic interferences (EMI) of an automotive inverter. A combined simulation of an equivalent circuit and the 3D geometry for a traction inverter based on 1.2 kV, 40 A SiC MOSFETs is presented. The model considers the MOSFET as a combination of parasitic elements of the package, voltage-dependent...
Silicon photomultiplier (SiPM) detectors are emerging semiconductor devices addressing the challenge of low-light detection for single-photon counting contexts. High-performance SiPM front-end electronics requires availability of reliable electrical models. Many accurate SiPM models have matured in recent years; nevertheless, circuit parameter extraction is fairly burdensome and involves extensive...
The operation of circuit-breakers generates high frequency signals, therefore, a way to capture these signals is a radiometric system to evaluate the operation of the circuit-breaker, the greatest advantage of this method is that it\s possible the analyze the performance of the circuit-breaker without the need of any operational change to insert measuring devices. However, it was necessary to verify...
This paper presents a method to model external capacitors behavior face to continuous and transient events. Temperature and the physical dimensions of the capacitors have been considered in order to predict Electromagnetic Compatibility performances of an equipment or a system. The different tests were performed on ceramic capacitor series X7R from Murata. A model has been developed in Verilog-A....
Induction machines are commonly used in traction applications due to their robustness and lower production costs when compared to the Permanent Magnet Synchronous Motor (PMSM). In such traction applications, the induction machines are mainly operated by field oriented control. This control technique requires an accurate knowledge of the machine's parameters. The accuracy of the parameters influence...
Organic LEDs can be used not only in displays but also in intelligent light sources. Unlike inorganic LEDs, OLEDs do not function as point-like but as surface light sources since manufacturing of large area light sources is more feasible with OLED technologies. Despite their lower luminous efficacy this makes OLEDs still an attractive option especially in high end indoor applications, The major issue...
Although existing standards such as IEC62684 and EN 301 489-34 limit the line frequency common mode (CM) voltages at the output of AC/DC converters, the mechanism and characteristics of line frequency CM voltages at the outputs of AC/DC converters are unclear and the technique to reduce it is not well investigated and developed. In this paper, the line frequency CM voltages at the outputs of AC/DC...
An electronic system will commonly have multiple emission (or noise) sources, some of which are correlated while others are un-correlated. Measuring the contribution to a node voltage or branch current by an individual source with high accuracy in such a multi source inter-coupled system is a fundamental problem. The problem is further amplified when the signal processing following the measurements...
Future naval medium-voltage direct current (MVDC) power systems will contain a large number of power electronic devices. The switching events from these devices will produce undesirable effects, such as common-mode (ground) current through coupling of the power system and the ships hull. Historically, research in the area of electromagnetic characterization provides insight into common-mode and conduction...
For applications such as electrified automotive powertrains, which require high power density and operating voltages, the lithium-ion battery is an ideal candidate. When individual batteries are combined into packs, a battery management system is needed to safely operate packs consisting of hundreds of cells in series and parallel configurations. While much attention has been given to modeling and...
Super-capacitor with the features of high power density and long life is used as a new kind of energy storage methods for electric bus. State of charge (SOC) indicates the remaining power, which is very important for super-capacitor bus. In this paper, a SOC estimate method based on sliding mode observer is studied. The design of sliding mode observer is based on the “two-branch” equivalent circuit...
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