Measurement and Modeling of Rotational Core Losses of Soft Magnetic Materials Used in Electrical Machines: A Review

• Published in: IEEE transactions on magnetics Vol. 44; no. 2; pp. 279 - 291
• Main Authors: Youguang Guo, Youguang Guo, Jian Guo Zhu, Jian Guo Zhu, Jinjiang Zhong, Jinjiang Zhong, Haiyan Lu, Haiyan Lu, Jian Xun Jin, Jian Xun Jin
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.02.2008; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Core loss; Cross-disciplinary physics: materials science; rheology; Design engineering; Electric variables measurement; Electrical machine; Exact sciences and technology; Flux; Loss measurement; Magnetic cores; Magnetic flux; Magnetic materials; Magnetic properties; Magnetism; Materials science; Mathematical analysis; measuring apparatus; measuring technique; modeling; Other topics in materials science; Physics; rotating flux; Rotation measurement; Rotational; rotational core loss; rotational hysteresis loss; rotational magnetization; soft magnetic material; Soft magnetic materials; Transformer cores; Vectors (mathematics); modeling; Magnetization; rotating flux; rotational magnetization; soft magnetic material; measuring technique; measuring apparatus; Machine; rotational hysteresis loss; rotational core loss; Iron loss; Magnetic materials; Modelling; Electrical machine; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2007.911250

In many situations, for example, in the cores of a rotating electrical machine and the T-joints of multiphase transformers, the magnetic flux varies with time in terms of both magnitude and direction, i.e., the local flux density vector rotates with varying magnitude and varying speed. Therefore, it is important that the magnetic properties of the core materials under various rotational magnetizations be properly investigated, modeled, and applied in the design and analysis of electromagnetic devices with rotational flux. Drawing from the huge amount of papers published by various researchers in the past century, this paper presents an extensive survey on the measurement and modeling of rotational core losses of soft magnetic materials used in electrical machines, particularly from the view of practical engineering application. The paper aims to provide a broad picture of the historical development of measuring techniques, measuring apparatus, and practical models of rotational core losses.