• 한국정보통신설비학회:학술대회논문집
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• 2006.08a
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• pp.170-174
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• 2006

In this paper electromagnetic topology (EMT) is used to analyze the lumped components on printed circuit boards (PCBs). It is difficult to obtain desirable results about the electromagnetic coupling problems by using a numerical or an experimental method on complex systems. The EMT can be considered as a helpful method to the analysis of electromagnetic interference / electromagnetic compatibility (EMI/EMC) problems in the complex system. To verify the validity of this method, three types of the PCBs mounting a simple circuit are fabricated and experimented.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.57 no.5
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• pp.821-826
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• 2008

Recently as a progress of electric technology, modern electric systems become more and more complicated. Thus, it is difficult to use a classical method to analyze responses of the systems in complicated electromagnetic environments because there are so many coupling phenomena. The electromagnetic topology (EMT) is a helpful solution to analyze electromagnetic interference / electromagnetic compatibility (EMI/EMC) of the large complex system. In this paper, EMT is applied to analyze an active element. And then to prove the validity of this analysis, a detector circuit including Schottky barrier diode is analyzed by EMT when input power is given directly.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.25 no.3
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• pp.311-318
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• 2014

Electromagnetic compatibility(EMC) performance of the first Korea space launch vehicle(KSLV-I) should be ensured and verified in order to guarantee the normal operation among the spacecraft, ground facilities which are installed in the space center, and other wireless communication networks. For the purpose of the EMC performance verification, pertinent EMC test specifications, methods, and procedures for both the subsystems and the system should be established in consideration of operational properties and electromagnetic environmental effects. And it is required to maintain and control the EMC properties consistently in accordance with the determined specifications up to the program closing phase. In this paper, sequential management work conducted during the overall development process of the KSLV-I is explained, and not only the phased EMC test plan for each model of the KSLV-I and its subsystem but also test method, specification, and results of the verification tests are presented. And also, multipaction analysis results are presented.

• Journal of the Korea Society of Computer and Information
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• v.13 no.7
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• pp.207-212
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• 2008

In EMC(electromagnetic compatibility) certification, the facilities and equipments have been considered as important qualification for registration of EMC certification business. In future, the certification environment is also supposed to be restricted Strictly. Many organizations have made on attempt to establish, certification environment as a international standard. Therefore, in order to enhance the competitive powers of domestic certification industry, a real-time system which can be measure automatically and remotely the temperature, humidity, illumination, CO/CO2, magnetic field, and human sensing is proposed in this paper. This system can also maintain the appropriate measurement environment by using USN (ubiquitous sensor network). The availabilities are confirmed through the experiment.

• Journal of the Korea Convergence Society
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• v.7 no.6
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• pp.23-28
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• 2016

In this study, an investigation study on EMC(Electromagnetic Compatibility) is presented for power converter circuit. A DC-DC power converter circuit using LT3652 chip is designed and fabricated. The simulation results using ANSYS SIwave for far field radiation and unwanted emissions are presented. To minimize the unwanted emissions, we design a optimized circuit by using capacitors and ground posts. The conducted and radiation emissions are measured in the EMC test chamber based on standardized testing procedures of CISPR 22. The measured EMI emission values for a power converter circuit are presented and compared with the original circuit. The results show that the unwanted emissions from the circuit are tremendously diminished due to the applied EMI reduction techniques. The results proposed here can be usefully applied on designing power converter modules.

• Journal of Multimedia Information System
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• v.1 no.2
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• pp.127-132
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• 2014

The transverse electromagnetic (TEM) cells are widely used for electromagnetic compatibility (EMC) testing and field probe calibrations. We propose the verification of TEM mode with statistical method using a four-port TEM cell. The verification results are compared with Normal, Rayleigh, and Gamma distribution. As a result, the 75 % quantile of the Rayleigh distribution is excellent agreement with the true quantiles for a number of calibration points.

• Nuclear Engineering and Technology
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• v.55 no.7
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• pp.2407-2418
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• 2023

Internal replaceable electronic module substitutions can impact EMC (ElectroMagnetic Compatibility) qualification testing and results if EMC testing is conducted at the cabinet level. The impact of component substitutions on EMC qualification results therefore should be evaluated. If a qualitative evaluation is not adequate to ensure that the modified product will not impact the cabinet level EMC qualification results, a new qualification testing should be conducted. Component level retesting should be conducted under electromagnetically equivalent conditions with the cabinet level test. This paper analyzes the propagation of conducted susceptibility test waveforms in a representative cabinet and evaluates the impact of component substitutions on cabinet level EMC qualification results according to the location of the replacement items. A guideline for a qualitative evaluation of the impact of component substitutions is described based on the propagation of the conducted susceptibility test waveforms. A module level test method is also described based on an analysis of the shielding effectiveness of the cabinet.

• Journal of Advanced Navigation Technology
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• v.24 no.5
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• pp.423-429
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• 2020

In this paper, the electromagnetic compatibility (EMC) test standard is described, and the purpose and test configuration for the electromagnetic susceptibility (EMS) test of the missile component and the missile system are confirmed. The test configuration and specifications are suggested by the configuration of the missile component and the missile system based on the US military standards MIL-STD-461F and MIL-STD-464C, and explained that the ungrounded state, the final operating state of the missile component and the missile system, was constructed. In addition, the methods for checking the steady state and the points to be considered during the immunity test were introduced.

• Journal of the Korea Institute of Military Science and Technology
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• v.17 no.5
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• pp.569-576
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• 2014

There were overwhelming high-frequency electromagnetic noises in 200kW-class hybrid electric vehicle(HEV) although EMC control strategy had been applied to cope with the electromagnetic noises during the development of HEV. This paper investigates the characteristics of the conducted and radiated emission noises, the source and path of noises, and the effects of EMI on the electronics. Finally the design concept of noise control is proposed.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2005.05a
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• pp.372-377
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• 2005

EMC(Electromagnetic Compatibility) is the ability of an electronic device that operates properly in its intended electromagnetic environment and not be a source of pollution to that environment. The designer anticipates EMC problems at beginning of the process and finds remaining problems in early prototype stages, and tests the final prototypes for EMC as thoroughly as possible. This is a more cost-effective method. In this paper, it analyzes EMC problems that were appeared in actual measurement of electric power control device and presents reduction technique of these problems.