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Applied Sciences
Special Issues
Recent Developments in Magnetic Materials and Devices
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Recent Developments in Magnetic Materials and Devices

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 1101

Special Issue Editors

Dr. Xueping Xu

E-Mail Website
Guest Editor
Key Laboratory of Ultra-Weak Magnetic Field Measurement Technology, Ministry of Education, School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China
Interests: self-powered system; rotating energy harvesting; triboelectric nanogenerator
Special Issues, Collections and Topics in MDPI journals
Dr. Wangchang Li

E-Mail Website
Guest Editor
College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Interests: structural and functional composite; metamaterials; soft magnetic composite; microinductor in electronics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue aims to collect high-quality review papers from the fields of magnetic materials and devices. We encourage researchers from various fields within the journal’s scope to contribute papers highlighting the latest developments through theoretical analysis, numerical simulations, and experiments in their research field, or to invite relevant experts and colleagues to do so. Topics of interest for this Special Issue include but are not limited to:

  • Soft magnetic materials and applications;
  • Magnetic amorphous and high entropy alloy;
  • Functional magnetic materials;
  • Magnetoelectric functional materials and devices;
  • Multiferroic materials and devices;
  • Permanent magnetic materials and their applications;
  • Magnetic nanomaterials and biomagnetism.

Dr. Xueping Xu
Dr. Wangchang Li
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • magnetic materials
  • magnetism
  • functional materials and devices
  • magnetic sensing
  • magnetic shielding

Published Papers (1 paper)

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Research

13 pages, 9349 KiB  
Article
A Novel Design of Permanent Magnets for the Air Gap Magnetic Field of Hollow-Cup Motor
by Jinji Sun, Haoxi Sun and Xueping Xu
Appl. Sci. 2023, 13(11), 6537; https://doi.org/10.3390/app13116537 - 27 May 2023
Viewed by 884
Abstract
Spacecraft motors are often driven with trapezoidal phase currents to achieve higher output torque. For hollow cup motors (HCM) driven by trapezoidal wave currents, parallel magnetised permanent magnet (PM) motors produce an air gap magnetic field (AMF) waveform which is significantly different from [...] Read more.
Spacecraft motors are often driven with trapezoidal phase currents to achieve higher output torque. For hollow cup motors (HCM) driven by trapezoidal wave currents, parallel magnetised permanent magnet (PM) motors produce an air gap magnetic field (AMF) waveform which is significantly different from the trapezoidal wave, causing the motor to generate noise or vibration. The existing control optimisation method or structure improvement design method is difficult to directly apply to HCM due to its large gas gap. In this paper, according to the fundamental theory of a constant magnetic field, the AMF of HCM is analysed using the equivalent surface current method (ESCM) and its mathematical model is established. The analytical expression of the AMF is solved, and the influencing parameters of the AMF are clarified. The structural design of the HCM with eccentric PMs sintered with high-performance NdFeB is further improved. On this basis, a prototype motor is designed. Simulation results show that the structure can effectively increase the width of the flat section of the AMF and make the AMF close to an ideal trapezoidal wave (ITW). Experiments verify the correctness of the method. Full article
(This article belongs to the Special Issue Recent Developments in Magnetic Materials and Devices)
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