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Permanent-Magnet Eddy-Current Losses: A Global Revision of Calculation and Analysis. MATHEMATICAL AND COMPUTATIONAL APPLICATIONS 2019. [DOI: 10.3390/mca24030067] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Eddy-current analysis is an important research field. This phenomenon occurs in multiple areas and has several applications: electromagnetic braking, repulsive effects, levitation, etc. Thereby, this paper is limited to eddy-current study in rotating electrical machines. In the design process, if the permanent-magnet (PM) loss calculation is very important, the overheating due to eddy-currents must be taken into account. The content of this paper includes sources, calculation methods, reduction techniques, and thermal analysis of PM eddy-current losses. This review aims to act as a guide for the reader to learn about the different aspects and points to consider in studying the eddy-current.
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Combining the Magnetic Equivalent Circuit and Maxwell–Fourier Method for Eddy-Current Loss Calculation. MATHEMATICAL AND COMPUTATIONAL APPLICATIONS 2019. [DOI: 10.3390/mca24020060] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this paper, a hybrid model in Cartesian coordinates combining a two-dimensional (2-D) generic magnetic equivalent circuit (MEC) with a 2-D analytical model based on the Maxwell–Fourier method (i.e., the formal resolution of Maxwell’s equations by using the separation of variables method and the Fourier’s series) is developed. This model coupling has been applied to a U-cored static electromagnetic device. The main objective is to compute the magnetic field behavior in massive conductive parts (e.g., aluminum, magnets, copper, iron) considering the skin effect (i.e., with the eddy-current reaction field) and to predict the eddy-current losses. The magnetic field distribution for various models is validated with 2-D and three-dimensional (3-D) finite-element analysis (FEA). The study is also focused on the discretization influence of 2-D generic MEC on the eddy-current loss calculation in conductive regions. Experimental tests and 3-D FEA have been compared with the proposed approach on massive conductive parts in aluminum. For an operating point, the computation time is divided by ~4.6 with respect to 3-D FEA.
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Integrated Design of a High Speed Magnetic Levitated Brushless Direct Current Motor System. ENERGIES 2018. [DOI: 10.3390/en11051236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Research on Strategies and Methods Suppressing Permanent Magnet Demagnetization in Permanent Magnet Synchronous Motors Based on a Multi-Physical Field and Rotor Multi-Topology Structure. ENERGIES 2017. [DOI: 10.3390/en11010040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Cheng W, Li W, Xiao L, Li M, Tian Y, Sun Y, Yu L. Sample MMM manuscript for submission to AIP advances transient line starting analysis of the ultra-high speed PMSM. AIP ADVANCES 2017; 7:056627. [PMID: 28105384 PMCID: PMC5236057 DOI: 10.1063/1.4974057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 06/06/2017] [Accepted: 10/25/2016] [Indexed: 06/06/2023]
Abstract
Aiming at the ultra high speed permanent magnet synchronous motor (PMSM) supported by gas foil bearings (GFBs), this paper calculates the transient line starting of the motor. Firstly, the start effect of the rotor composed of cylindrical PM and stainless steel sleeve is studied. Then, in order to enhance the start torque, copper ring, nickel ring and copper squirrel-cage are introduced in the rotor and their start effect are analysed, respectively. It can be found that the rotor including nickel ring can be accelerated to set speed, but all the other rotors are failed due to the higher PM and braking torques. It can be concluded that some material owning slight large relative permeability can be applied in the rotor to reduce the PM field and contribute to start by using the line-start method.
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Affiliation(s)
- Wenjie Cheng
- Department of Basic Courses, Mechanics Research Center, Xi'an University of Science and Technology , Xi'an, Shaanxi 710054, China
| | - Wei Li
- Department of Basic Courses, Mechanics Research Center, Xi'an University of Science and Technology , Xi'an, Shaanxi 710054, China
| | - Ling Xiao
- Department of Basic Courses, Mechanics Research Center, Xi'an University of Science and Technology , Xi'an, Shaanxi 710054, China
| | - Ming Li
- Department of Basic Courses, Mechanics Research Center, Xi'an University of Science and Technology , Xi'an, Shaanxi 710054, China
| | - Yongsheng Tian
- Institute of Engineering Thermophysics, Chinese Academy of Science Corporation or Laboratory , No. 11, Beisihuanxi Road, 100190, Beijing, China
| | - Yanhua Sun
- Institute of Mechatronics and Information Systems, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University , Xi'an, 710049, China
| | - Lie Yu
- Institute of Mechatronics and Information Systems, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University , Xi'an, 710049, China
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