EMI Happens When Nobody's Looking EMC Management

Chapter 17 - EMC management

The design, implementation and integration of distributed systems such as a railway signaling system (or rolling stock) requires the assessment of the electromagnetic compatibility of the whole system and the evaluation of the interference between the sub-systems and components. The successful delivery of such systems is usually achieved through a well structured system engineering process. To assure system level electromagnetic compatibility, it is important to fully understand the design requirements, the electromagnetic environment in which the system will be used, the system interfaces-and their ability to influence the system EMC, the system EMC requirement and documentation requirements to demonstrate system compliance as well as the safety functionality of the system (or sub-system). EMC system engineering is therefore required throughout the life cycle of the system. This paper deals with the principles of EMC assurance and management within a system engineering approach to system design. (8 pages)

To design a highly reliable data center, it requires careful consideration of many factors. In this paper, the importance of EMC, acoustics, and thermal management and the relationships between them are discussed. The basic design guidelines of each, and their important role within the data center space to achieve high availability especially from a thermal management viewpoint and its interaction with EMC are carefully reviewed.

<div class="section abstract"><div class="htmlview paragraph">Shielding of the high voltage cabling is a cost effective method for reducing unwanted EMI in hybrid and electric vehicles. Ensuring the shielding effectiveness (SE) of the high voltage (HV) cabling and connectors is critical at the component and subsystem level. The effectiveness of the shielding must also be proven for the useful life of the vehicle. This paper will examine some of the critical aspects of ensuring good SE of HV cabling and connectors in hybrid and electric vehicles. This paper will also review some of the test methods utilized to make these measurements.</div></div>

With the formal release of railway applicable European EMC standard, EN-50121:2000, EMC assurance for the railway industry has reached a matured stage. This paper describes the current EMC management methodology and lifecycle developed to manage the EMC aspects of the West Rail project, one of the largest railway projects in Hong Kong. The key activities and tools developed for each phase of the lifecycle are discussed. Practical issues encountered and the solutions adopted are elaborated The EMC management lifecycle approach has been found to be an effective framework to achieve EMC assurance for a complex railway project comprising both heavy electrical systems and sensitive computerised control and communication systems.

In this chapter, some EMC basics are explained - in particular, how interferences couple from their sources along wires or via fields to the victims (sinks), where and how they are generated, how victims are influenced by electromagnetic interference (EMI) and how countermeasures generally work; special countermeasures are discussed in later chapters. For a deeper understanding, textbooks dedicated to the fundamentals of EMC or even electrodynamics are recommended, e.g. [64] from a theoretical perspective, [10,19,203] from a mathematical/numerical perspective and [174,188] from a practical perspective. Together with EMC, signal integrity and power integrity (SIPI) are also considered. It is important to consider EMC early in the development process. We will pick up the design flow with EMC management, EMC analysis and EMC control in subsequent chapters - in particular, Chapters 6 and 7. We lay foundations for simulation in

<div class="section abstract"><div class="htmlview paragraph">The application of power electronics in aircraft is increasing in the latest aircraft developments. This contribution focuses on the recent advances of activities at Liebherr-Elektronik GmbH linked to power electronics: active power filter based on fast silicon carbide switches, open box design for unpressurized area, light weight housing, EMC management, partial discharge detection and mitigation, arc-fault detection and standardized innovative power cores with optimized sensors. These topics are derived from a roadmap based on beforehand identified key drivers. These key drivers will enable the future More Electric Aircraft (MEA) by focusing on weight, reliability and cost. New technologies as Silicon Carbide (SiC) and advanced integration will support this strategy.</div></div>

The article reviews the latest scientific achievements in the field of electromagnetic compatibility, presented at the international regional symposium on electromagnetic compatibility "EMC Europe 24" by the leading EMC research organizations, European, Asian, African and South American universities, as well as the largest companies, microelectronics manufacturers, automotive and aviation companies. The symposium "EMC Europe" is the leading international regional symposium on electromagnetic compatibility and continues a long tradition of regular international symposiums on EMC, organized in Europe. The symposium considered the following issues: EMC of 5G, 6G networks and the Internet of Things (IoT); standards and rules, EMC management, EMC education; risk-based EMC, electromagnetic immunity; EMC in safety and security applications, in industrial environments and in military applications; Electromagnetic environment, lightning protection, intentional EMF and EMP, high-power electromagnetic interference, electrostatic discharges; wired and wireless communications, UWB, power line communications, spectrum management; automotive, rail, naval, aviation and space systems. The article presents the results of studies on the EMC impact assessment of Wi-Fi device transmitters (RLAN networks) on 5G radio receivers, the application of models developed for the assessment of shielding properties of a wide range of products made of composite materials, the study of characteristics and the development of nonlinearity models of radio frequency amplifiers (RFAs) of the FR1 range of 5G networks for their subsequent application in solving EMC problems of mobile (cellular) radio equipment in complex EMO created in the 4G/5G frequency bands, etc.

The paper discusses the EMC management philosophy, technology trends and perspectives in the system design, testing, maintenance and application of the "readymade recipe" for EMI control measures.

The Applications Technology Satellite-F Spacecraft to be launched in 1974 contains a number of explicit communications functions and related experiment packages involving radiation and reception of frequencies spread over 10 octaves of the RF spectrum. Its configuration was developed directly from program requirements, but numerous special design features were incorporated to enable the various subsystems and components to operate compatibly with one another. Such factors as spacecraft weight limitations, thermal control considerations, and the need to prevent single point failures in critical circuits led to the development and use of these special features. The spacecraft's configuration is one in which a large portion of the subsystems and components are, mounted in a box-like structure at the prime focus of a 30-ft. diameter parabolic reflector. The box-like assemblage is called the earth-viewing module (EVM). In addition, numerous power, signal and sensor cables interconnect the earth-viewing module with space-viewing components mounted above the parabola. Because the Spacecraft's output reaches 180 kw EIRP, its configuration results in formidable EMC challenges.

In this paper, we describe the process utilized to develop a comprehensive EMC management strategy to support engineering and design groups at our San Diego Technology Center- SDTC. The development of a new EMC management program and constructing a supporting facility is key for support of television, computer and computer display's digital cable boxes, digital satellite receivers, digital video recorders and similar product development. Developing our capital and human resource plan to build an efficient EMC lab was approached only after research of other EMC labs recently developed or in actual development and construction phases. The paper attempts to document the process in developing management support for both the development of an expanded internal EMC site and the supporting management structure.

EMC Community is often a distinct minority in the technical population. In an organisational set-up EMC engineers are normally surrounded by designers, manufacturers, quality assurance specialists, computer scientists and managers who have little patience with vagaries of EMC. However, EMI control generally is at the bottom of the list of the design considerations due to focus on schedule commitments, product performance and cost over benefit ratio. This managerial considerations predominantly influence the development of an electronic product in Government and Commercial sectors. The paper discusses the corporate EMC management programme, product flow process, human Resource development, cost concerns in our country. Finally two EMC management organisational set-ups, one each in Defence and Industrial sectors are proposed to cater to design standards, product development, EMI test house responsibility, specification compliance as a part of EMC regulatory efforts.

Is EMC/telecom (CE) testing a business or just another regulatory requirement? Can EMC be a potential trade barrier between Asia and the EU? The following issues are considered. Tricks of the trade in global EMC compliance (CE, MRA, norms, clients). Consequences if manufacturers do not take EMC serious. EMC management (20Y) in small, medium and large EU corporations. Competition in EU (Germany) EMC markets. Why should your lab be ISO/EN 17025? Procedure, cost and benefits. Planning, investing, marketing, operating, staffing and managing labs. Calibration, measurement uncertainty (k = 2) traceability, employee training. First results of the 100 German EMC inter-lab-comparison test. German DAR auditor (10Y) experience in quality and technical assessment. Which common deficiencies in the labs do frequently occur? Illustrative case studies of auditing EU and Asian test labs. Can Asia avoid western world mistakes? This is all embedded in a critical review and analysis of politics, technology, interpretation of norms and lab service quality.

A high-quality EMC lab complies with both the management and the technical requirements of ISO/IEC 17025. Continuous improvement of the laboratory procedures is essential to on-going compliance with ISO/IEC 17025. Personnel training is one of the keys to maintaining a high-quality EMC lab. Test equipment is another key to the successful operation of an EMC lab and its compliance with ISO/IEC 17025 criteria. EMC test equipment must be properly maintained and suitably calibrated on a periodic basis.

It is widely agreed that each electronic hardware product should be found to meet a minimum level of robustness prior to being released for production. To that end, a minimum set of hardware tests along with detailed pass/fail criteria should be employed to verify a product's robustness prior to its release and sale. EMC testing should be viewed not only as a regulatory requirement, but as an integral part of this essential test program as well. This paper details how one company has implemented a standard hardware suite of tests whereby EMC and EMI testing are essential parts of determining if a product is ready to meet the demands that its manufacturing partners, its field organization, and ultimately its customers, place upon it.