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An electromagnetic interference (EMI) filter design method for electric vehicle (EV) application is proposed in this paper. By transforming the design problem to an optimization problem, the filter volume, system disturbance level, inverter touch current and filter leakage current are taken into account simultaneously. A topology and order evolution approach is merged into the optimization algorithm...
Electrical Co-design of IC-package-PCB products for Set-Top Box applications has been changing quickly in the past years. The new generation of processors (A53, A57…) is indeed bringing interesting challenges as the business seems to be looking for the most power efficient CPU architectures (DMIPS/W). Moreover standards of high-speed interfaces are being released with increasing speeds (HDMI2.1, USB3...
A discrete optimization using a genetic algorithm (GA) for electromagnetic interference (EMI) f ler design is presented in this paper. Using a macro-model in the frequency domain this approach takes into account the load impedance and the source emissions. The macro-model includes an accurate filter model that takes into account the PCB stray elements and the passive components high frequency complex...
Electromagnetic interference (EMI) and its filtering are important considerations in switching power converter design. It has been recognized that an EMI filter must be sufficiently damped in order to avoid undesirable interactions with the converter or the source, which otherwise may lead to instability and degraded control performance. Optimal damping of single-stage LC filters that achieves maximal...
High frequency (HF) models of electrical motors and converters are of basic importance for Electro Magnetic Compatibility (EMC) characterization of electrical drives and for EMI filters design. In this paper a method for characterizing and tuning HF models (150kHz - 30MHz) for induction motors has been proposed based on experimental measurements of the motor impedance. Impedance measurements have...
Digital networks can be established using the same set of wires that is used to distribute the power signal through our homes, the power-line channel (PLC). This networks have no new wires. However, the PLC channel has highly varying characteristics that need to be taken into account, namely the equivalent transmission line characteristic impedance and input impedance. The impedance seen at the input...
This paper analyzes the electrical parameters of differential-mode (DM) and common-mode (CM) inductors used in EMI filters. To design an EMI filter, it is necessary to identify the various parameters of the passive elements: inductors and capacitors. Because of their major impact on filter efficiency, these elements must be identified with accuracy. In this study, a high frequency model of coupled...
Comparisons of evaluated and actual performances of common mode chokes are presented. The evaluated performances are based on a new behavioural model for common mode chokes and the identification of its uncertainties to evaluate the upper and lower limits of the final attenuation. Results are compared with the final performances of the choke placed in a circuit. The behavioral model is essential in...
Electromagnetic interferences due to on board-devices may differ from what can be expected after unitary on-bench tests. This work deals with the extension to the multipolar case of a previous approach, aiming at ensuring that the on-board device performances will be satisfactory. It is based on the computation of new limits for on-bench tests obtained through a global optimization process.
Piezoelectric transformer (PZT) is a device which transforms voltage by piezoelectric effect and converse piezoelectric effect of ceramic material. Compared with electromagnetic transformer, it has favorable characteristics of miniaturization, electromagnetic-noise free and the variable voltage gain with frequency and impedance. The modeling of piezoelectric transformer is the base of control and...
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