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There are a number of factors that may affect the validity in measuring radiated emission test parameters in electromagnetic compatibility (EMC) testing. This research observes the effect of the placement of video pattern generator on the validity of measurement results of radiated emission parameter. The radiated emission measurement with the location of video pattern generator inside and outside...
An automotive application can see several perturbations during his life. In this paper we study how the LIN communication under ESD stress behaves and what sort of failures could be observed. We proposed a characterisation method in order to quantify soft failures. These different failures are classified following a criteria defined in the document. A susceptibility level for the LIN communication...
The equivalent circuits modeling method is developed for the EMP(Electromagnetic pulse) generators of the equipment-level immunity test. On the double-exponential function of EMP waveform, the corresponding circuit structure is introduced, and the calculation method is given to obtain the circuit RLC parameters. For the generators of EFT(Electrical Fast Transient/Burst), surge combination wave, and...
In regard to the influence of AC mains cable termination on radiated emission, we compared and analyzed the simulation results in single-wire and 3-wire line configuration by round-robin testing with a comb generator and tower PC. The analysis result demonstrates that the deviation with 25-ohm and 150-ohm termination and the deviation with a comb generator and a tower PC using a very high frequency...
This paper addresses the question of modelling voltage source terms when applying Agrawal's Field-to-transmission Line model in a numerical procedure involving a 3D full wave solver and Multiconductor Transmission-line Network solver based on the BLT equation. It particularly stresses the fact that the prima facie model consisting in integrating voltage sources along cells larger than usual criterion...
Todays installed multi-megawatt wind turbines (WT) form highly diverse system due to very complex control devices. Thus, special attention has to be paid to the electromagnetic compatibility (EMC) of the wind turbine. This contribution deals with different electromagnetic interference (EMI) and susceptibility (EMS) effects within the wind turbine. A well-known susceptibility problem of constructions...
The paper describes one of several possible uses dual high-frequency generator. This generator has been previously described by [1] and presented at several conferences. Here are described and tested measurement using the thermal imager. Generator irradiated suitable material. Material changes electromagnetic energy to heat. Thermal imager track is recorded. Thermal track is processed in the “Therma...
In this letter, we propose a methodology to include contact bounce, unavoidably occurring in a pulse generator, in the modeling of a transient electromagnetic compatibility (EMC) test. An example of such an EMC test is the RI 130 test, well known in the automotive sector and used as case study in this letter. First, a detailed study of contact bounce of an electromagnetic relay is performed, leading...
Switch mode power supplies generated a wide range of conductive and inductive interference. Moreover, the spectrum dominated by discrete components with a switching frequency of a power transistor and its harmonics. To ensure the electromagnetic compatibility of devices necessary to reduce the amplitude of these spectral components. In this paper the questions of usage of spread spectrum technology...
A test set-up has been developed to examine immunity of electronic circuits exposed to the nearby flash magnetic field component. The test set-up generates an impulse current to simulate the nearby flash, and the impulse waveform is determined by the standard AECTP 250, in compliance with the military standardNO-16-A002:2015.
Continuing currents, besides the main short duration return strokes, are ones of the basic components of lightning. Open air experiments were conducted to examine the distribution of continuing current components in lightning protection system, supplying cable and electrical installation of the test house equipped with household appliances. The lightning continuing current was physically simulated...
A comparison of currents and fields calculated for two models of a lightning strike to a lightning protection system is presented. One model is a simulation of a real lightning strike, taking into account the length of the lightning channel. The second one simulates the experimental setup with a lumped generator of surge currents. Differences resulting from disregarding of the lightning channel length...
In this paper we propose a computational procedure to evaluate the performances of inductive blocking devices used for the mitigation of indirect lightning effects on electrical and electronic equipment in the avionic environment. The non linear behavior of the blocking devices are simulated using a finite difference scheme in time domain. Computations and experimental results are compared and discussed.
This paper introduces the design of a Marx Generator that can generate high attitude pulses up to 25 kV and 2.5 kA. The pulses have a wave shape representative of that used to test High-altitude ElectroMagnetic (HEMP) filters against the pulse current injection (PCI) requirements. The rise time is 20 ns and the pulse width is 230 ns on a 10 Ω resistor. In the design, it was found that parasitic effect...
In this work, basic principles of an alternative test procedure exploiting crosstalk to reproduce in the terminal loads of a wiring structure the same disturbances that would be induced by traditional radiated susceptibility (RS) tests are presented. Equivalence with radiation is achieved by the use of a generator circuit properly fed with two synchronized RF generators, and holds for whatever loads...
The paper presents method for assessing immunity electronic equipment for high power electromagnetic pulses carried out by employees of the LAB-KEM MUT. Assessment immunity of electronic equipment will help you understand the susceptibility threshold of these devices on the high power electromagnetic pulses environment (called High Power Electromagnetic - HPEM). This assessment focuses on determining...
The article deals EMC research of 18-pulse circuit consisting of three level neutral point clamped (3L-NPC) converters with selective harmonic elimination (SHE) algorithm. Main object of research is power circuit of wind-driven electric plants based on 18-pulse circuit consisting of three 3L back-to-back (BtB) converters. A review of contemporary condition of power electronics for application in wind...
Apart from ESD tests at system level, e.g. according to IEC 61000-4-2, the investigation of the EMC immunity of individual ICs is becoming increasingly important: an ESD sensitive IC could cause problems in subsequent system level tests when in use. Knowing in advance what to expect from an IC can help save time and money in the design process. An appropriate component level test bench is therefore...
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