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Symmetry
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Research on Motor and Special Electromagnetic Device of Symmetry II
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Research on Motor and Special Electromagnetic Device of Symmetry II

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Computer".

Deadline for manuscript submissions: closed (31 March 2024) | Viewed by 3455

Special Issue Editors

Prof. Dr. Liyi Li

E-Mail Website
Guest Editor
Department of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Interests: special electromagnetic device; control and drive of linear motors; linear electromagnetic launch; accumulation of electric energy; superconducting motors
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Mingyi Wang

E-Mail Website
Guest Editor
School of Electrical Engineering and Automation, Harbin Institute of Technology, Herbin 150001, China
Interests: special electromagnetic device; control and drive of linear motors; linear electromagnetic launch; accumulation of electric energy; superconducting motors
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Xuzhen Huang

E-Mail Website
Guest Editor
College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Interests: special electromagnetic device; control and drive of linear motors; linear electromagnetic launch; accumulation of electric energy; superconducting motors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Motor and special electromagnetic devices have been widely used in fields such as industrial production, transportation, high-end manufacturing, national defense and the military industry, and they are an important energy power foundation for supporting social development. High-power density, high reliability, high adaptability, high precision, low emission and multi-functional composites are areas that are gradually developing at the forefront of the technological development of these devices. Future development and research will concentrate on technologies used in high-performance motors and special electromagnetic devices.

This Special Issue hopes to summarize the state-of-the-art technologies of high-performance motors and special electromagnetic devices, which include the summarization of the latest structural research and analysis, operation and control, integration and optimization, etc. Papers that employ the symmetry or asymmetry concept in their methodologies in the fields of motors and special electromagnetic devices are welcome. We also welcome scholars in related fields to contribute their latest research results to this Special Issue.

Topics of the research papers include, but are not limited to, the following: 

  • Modeling of motors and special electromagnetic devices;
  • Multi-physics coupling analysis and optimization;
  • Efficient temperature rises and cooling structure design;
  • Advanced drive technology;
  • Intelligent control strategy;
  • Highly reliable system operation;
  • Integrated design and analysis.

Prof. Dr. Liyi Li
Prof. Dr. Mingyi Wang
Prof. Dr. Xuzhen Huang
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. Symmetry is an international peer-reviewed open access monthly 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.

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

16 pages, 5327 KiB  
Article
Control and Analysis of a Hybrid-Rotor Bearingless Switched Reluctance Motor with One-Phase Full-Period Suspension
by Zeyuan Liu, Xingcheng Wu, Wenfeng Zhang, Yan Yang and Chengzi Liu
Symmetry 2024, 16(3), 369; https://doi.org/10.3390/sym16030369 - 18 Mar 2024
Viewed by 1398
Abstract
In the traditional control scheme of a 12/8-pole bearingless switched reluctance motor (BSRM), radial force and torque are usually controlled as a compromise due to the conflict between their effective output areas. Additionally, each phase requires individual power circuits and is excited in [...] Read more.
In the traditional control scheme of a 12/8-pole bearingless switched reluctance motor (BSRM), radial force and torque are usually controlled as a compromise due to the conflict between their effective output areas. Additionally, each phase requires individual power circuits and is excited in turn to produce a continuous levitation force, resulting in high power device requirements and high controller costs. This paper discusses a 12/8-pole single-winding hybrid-rotor bearingless switched reluctance motor (HBSRM) with a hybrid rotor consisting of cylindrical and salient-pole lamination segments. The asymmetric rotor of the HBSRM slightly increases the complexity of its structure and magnetic circuit, but makes it possible to generate the desired radial force at any rotor angular position. A control scheme for the HBSRM is developed to utilize the independent excitation of the four windings in one phase to generate the desired levitation force at any rotor angular position, and it requires only half the number of power circuits used in the conventional control scheme of a 12/8-pole single-winding BSRM. Different from the average torque chosen to be controlled in traditional methods, this scheme directly regulates the instantaneous total torque produced by all excited phases together and presents a current algorithm to optimize the torque contribution of each phase so as to reduce torque pulsation, and the improved performance of this bearingless motor is finally validated by simulation analysis. Full article
(This article belongs to the Special Issue Research on Motor and Special Electromagnetic Device of Symmetry II)
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14 pages, 2677 KiB  
Article
A Low SNR Signal-Sensing Method Based on a Multiple-Antenna Covariance Matrix
by Yumin Zhong and Yanhua Li
Symmetry 2023, 15(4), 888; https://doi.org/10.3390/sym15040888 - 9 Apr 2023
Viewed by 1518
Abstract
In this paper, we propose a promising signal-sensing method based on both single- and multiple-antenna covariance matrices of the received signal. In comparison with microwave diagnostics or energy detection, the proposed method does not need prior information of signal and noise. Therefore, it [...] Read more.
In this paper, we propose a promising signal-sensing method based on both single- and multiple-antenna covariance matrices of the received signal. In comparison with microwave diagnostics or energy detection, the proposed method does not need prior information of signal and noise. Therefore, it can be widely used in noise power uncertainty scenarios, such as signal transmission in hypersonic plasma sheath, with symmetry to the signal-sensing method in cognitive radio. Designing an efficient signal-sensing method that supports both the application for the field of hypersonic plasma sheath communication or cognitive radio is still an attractive subject deserving of study in symmetry journals. Theoretical analysis and the implementation algorithm of a single-antenna covariance matrix are carried out for the proposed method, with a possible extension to multiple-antenna situations. Simulations show the proposed method has excellent performance, even for very low signal-noise-ratio (SNR) signals, and is competitive with state-of-the-art algorithms. Full article
(This article belongs to the Special Issue Research on Motor and Special Electromagnetic Device of Symmetry II)
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