Conference Agenda

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Session Overview
O_We_B_Room3: Standards & Regulations
Wednesday, 04/Sep/2019:
11:20am - 12:40pm

Session Chair: Luis Nuño
Location: Room 3

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Far Field Region of Radiated Emissions from Wind Energy Conversion Systems

Sven Fisahn1, Hoang Duc Pham1, Sebastian Koj2, Sergei Sandmann1, Heyno Garbe1

1Leibniz Universität Hannover, Germany; 2IAV GmbH, Gifhorn

Wind energy conversion systems (WECS) or wind turbines (WTs), respectively, radiate electromagnetic (EM) emissions unintentionally. In order to ensure that radio broadcasting services or terrestrial navigation systems are not disturbed by WTs, the radiated EM emissions have to be measured and assessed according to the corresponding standards. Due to the enormous size of a WT, it seem to be reasonable to evaluate, whether the emission measurement is be carried out in the far field region. For this reason, numerical field calculations are carried out by means of an simplified WT model. It points out, that far field region of the radiated emissions is not located in the standardized measurement distance of 30 m, but a distance of more than 3 km with respect to the WT. Assuming that a real world WT behaves similarly than simulation model used for the numerical field calculations, the measuring locations defined in the corresponding standards are only conditionally suitable for electrical large radiators like wind turbines.

Analysis on the Correlation Between Vehicle RFI and Component EMI Tests Using BCI and RI Methods

Younghun Lee1, Keunsu Kim1, Jeonggil Heo1, Youngduk Park1, Ickjae Yoon2

1Hanonsystems, Korea, Republic of (South Korea); 2Chungnam National University

Even though component Electromagnetic Interference (EMI) test has been passed for a product, it often happens that the actual vehicle Radio Frequency Interference (RFI) test fails. Because of the different result of tests, many vehicle and component makers should spend more time for the later works, and consequently cost of the product and the vehicle development increase. There are several types of difference between component EMI and vehicle RFI. First is the difference of level between them. Second is the difference of resonance frequency. Third is the difference of the specification. The last is no types of component EMI tests matches to the vehicle RFI test result. In this paper, we introduced Radiated Immunity (RI) and Bulk Current Injection (BCI) methods to analyze the difference between component EMI test and vehicle RFI test. Using these methods, we could have analyzed the difference between each component EMI level and the vehicle RFI level, and we expect that vehicle and product makers can reduce the development schedule and cost at the same time by introducing the proper component EMI specification.

Radiated Disturbance Measurements in SAC and on OATS for Wireless Power Transfer System

Tetsu Shijo, Kenichirou Ogawa, Masatoshi Suzuki, Kazuhiro Inoue, Yasuhiro Kanekiyo, Koji Ogura, Shuichi Obayashi, Masaaki Ishida

Toshiba Corporation, Japan

Measurement methods and suppression techniques for radiated disturbances from high-power wireless power transfer (WPT) systems are being developed. Magnetic field strength measurements of the radiated disturbance in the frequency range 9 kHz to 30 MHz at a measurement distance of 10 m were performed in a semi-anechoic chamber (SAC), the walls of which were treated as sound-reflecting structures. Measurements were also performed at an open-area test site (OATS), where ambient noise was considered. In this pater, the effective of the measurements in the SAC is verified at a nominal distance of 10 m in the frequency range 9 kHz to 30 MHz. Then, the suppression techniques for the radiated disturbances at the operating frequency are evaluated in the WPT system with a transmitting power of 5 kW.

Use of the Goal Structuring Notation (GSN) as Generic Notation for an “EMC Assurance Case”

Davy Pissoort, Jeroen Boydens, Johan Catrysse, Theresa Bultinck

KU Leuven, Belgium

In this paper, the use of Goal Structuring Notation for an EMC Assurance Case is explored for the first time. Over the years, Goal Structuring Notation has become the standard-ized notation for so-called Safety Assurance Cases and has a large supporting community. Use of Goal Structuring Nota-tion for the technical documentation related to compliance to the EMC Directive leads to argumentation in a clearer for-mat than plain text. The basic elements of Goal Structuring Notation are explained and applied to two EMC-related use-cases: (i) a generic EMC assurance case for equipment that can be tested in an EMC test lab and (ii) the specific case of large machines, for which in-situ testing is often the only economically viable option.