An Improved Two-Coil Configuration for Low-Frequency Magnetic Field Immunity Tests and Its Field Inhomogeneity Analysis

Yang, Yong; Song, Zhiquan; Jiang, Li; Ren, Bo; Zhang, Ming

doi:10.1109/tie.2018.2807420

Cited by 41 publications

(16 citation statements)

References 28 publications

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“…They were able to prove that the two-coil system had similar results as the Helmholtz coil system with reduced mass and lower electrical dissipation. 46…”

Section: Magnetic Field Immunity the Cables And Wiresmentioning

confidence: 99%

Electromagnetic Interference (EMI): Measurement and Reduction Techniques

Mathur

Raman

2020

Journal of Elec Materi

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Electromagnetic interference (EMI) is one of the biggest challenges faced during the production of any electronic device. The effect on the performance of the instrument due to these inevitable interferences must be carefully measured to understand and quantify the electromagnetic compatibility (EMC) of the instrument under test. If the EMI profile of the system does not meet the accepted standards, then it becomes necessary to take measures to reduce the influence of these unwanted interferences so that the equipment can be used in the real world. Unfortunately, research and studies on EMI and EMC have not received their due attention from the scientific community. Moreover, the literature available for this area of research is scattered where different sources provide information on one or more (but not all) aspects of EMI/EMC while ignoring the others. With the objective of encompassing this extremely significant area of research in its entirety, this review presents both EMI measurement techniques and EMI reduction techniques in detail. EMI measurement techniques are presented under two sections that deal with emission testing and immunity testing, respectively. Herein, EMI reduction techniques are presented under four sections, where electromagnetic shielding has been given special attention under which various methods used by the scientific community to measure the shielding effectiveness of a material or microwave absorber and its application in EMI reduction are illustrated. This is followed by EMI filters, circuit topology modification and spread spectrum. This review can help students and young scientists in this area to get an idea of the ways to conduct EMI tests as well as the ways that can be employed to reduce the EMI of the system, depending on the application.

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“…They were able to prove that the two-coil system had similar results as the Helmholtz coil system with reduced mass and lower electrical dissipation. 46…”

Section: Magnetic Field Immunity the Cables And Wiresmentioning

confidence: 99%

Electromagnetic Interference (EMI): Measurement and Reduction Techniques

Mathur

Raman

2020

Journal of Elec Materi

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“…Then, Equation 2is parameterized to obtain the function distribution of the maximum, minimum, and uniformity of the magnetic field to unknown parameters in the test area. The expressions for the function distribution are given [16] .…”

Section: A Magnetic Field Model Of the Square Coilmentioning

confidence: 99%

“…The Helmholtz coil structure has been studied the most because it has a simple structure and can be applied in most situations. The configuration, principle, and optimization of a Helmholtz coil are described and analyzed in detail in [6]- [16]. For applications that require a higher magnetic field uniformity, multi-coil systems can be used to solve the problem.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design Method to Improve the Magnetic Field Distribution of Multiple Square Coil Systems

Huang

Jiang

et al. 2020

IEEE Access

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Power electronic equipment regulated by the International Thermonuclear Experimental Reactor (ITER) organization must be tested in a relevant steady-state magnetic field immunity test, and the test area is generally required to be a cube shape. For this reason, a multiple square coil system structure is used. In this paper, a Taylor expansion and an optimization program are used to determine the optimal parameters of a coil system with different groups. For a three-coil system, the effects of the conductor cross-section, conductor spacing, helical structure, and conductor connection on the magnetic field uniformity are analyzed. A clear understanding of the influence degree of the error helps design an actual coil system. ITER organization is currently conducting research on magnetic field generator for electronic devices in large scientific devices. The design method proposed in this paper can reduce the design difficulty and provide theoretical support. INDEX TERMS Error analysis, immunity test, magnetic field uniformity, multiple square coil systems.

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“…According to the immunity test method proposed by the ITER organization, three main parameters are introduced to identify the test magnetic field zone, which are (1) the side length of the cubic test zone (denoted as s ), (2) the maximum axial magnetic flux density in the test zone (denoted as B z max ), and (3) the magnetic field inhomogeneity (denoted as η ), which is defined as the ratio of the maximum to the minimum magnetic flux density in the zone [7]. The above three parameters together specify the dimension, intensity, and homogeneity of the required test field.…”

Section: Introductionmentioning

confidence: 99%

“…However, massive coil turns or even busbar with a large cross-section area will be employed when a high-intensity magnetic field is required, where the cross-section effect is considerable. So far, although a few studies have analysed the influence of the cross-section effect [7,15,16], optimization that takes into account the effect is not considered. This is an important issue for such applications.…”

Section: Introductionmentioning

confidence: 99%

Multi‐objective optimization design of the large‐scale high‐intensity homogeneous magnetic field coil system based on non‐dominated sorting genetic algorithm (NSGA‐II)

Zhu

Yang

et al. 2022

IET Electric Power Appl

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With the development of modern tokamak devices, the magnetic interference problem has become increasingly serious. On considering the International Thermonuclear Experimental Reactor (ITER), for example, the stray magnetic field around the tokamak device will be over 200 mT. To ensure the reliable operation of the electrical and electronic equipment installed around the tokamak, the magnetic immunity test becomes a mandatory requirement. Generally, a set of coils is employed to realize the required test field. Since the coil power loss and conductor mass are proportional to the dimension and intensity of the test field, optimization design is of great significance. This paper presents the multi‐objective optimization design of a large‐scale high‐intensity homogeneous magnetic field coil system. The analytical model of the multi‐coil system is proposed, and the constrained multi‐objective optimization model is established based on the non‐dominated sorting genetic algorithm. Taking the ITER test coil as an example, the optimization design is performed and the Pareto‐front is figured out. The designed four‐coil system enables the magnetic field immunity tests for equipment within 1 m side‐length at a highest test level of 275 mT with a magnetic field inhomogeneity of 1.05. The validity of the proposed model is verified by the finite element analysis and experimental tests.

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An Improved Two-Coil Configuration for Low-Frequency Magnetic Field Immunity Tests and Its Field Inhomogeneity Analysis

Cited by 41 publications

References 28 publications

Electromagnetic Interference (EMI): Measurement and Reduction Techniques

Electromagnetic Interference (EMI): Measurement and Reduction Techniques

Optimal Design Method to Improve the Magnetic Field Distribution of Multiple Square Coil Systems

Multi‐objective optimization design of the large‐scale high‐intensity homogeneous magnetic field coil system based on non‐dominated sorting genetic algorithm (NSGA‐II)

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