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Symmetry
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Symmetry and Renewable Energy
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Symmetry and Renewable Energy

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

Deadline for manuscript submissions: 31 July 2025 | Viewed by 522

Special Issue Editors

Dr. Jianwei Tan

E-Mail Website
Guest Editor
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Interests: bionic structure design; biomaterials; numerical simulation; multidisciplinary optimization; environmental engineering; carbon calculation
Prof. Dr. Guangdong Tian

E-Mail Website
Guest Editor
School of Mechanical-Electrical and Vehicle Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
Interests: adaptive robust control; logistics and transportation; AI intelligent algorithm; green manufacturing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue aims to shed light on the potential that the study of symmetry has in power grids and renewable energy systems. Symmetry and renewable energy is a field of basic research, which covers quite a lot of areas, such as materials science, machine design, physics, and, of course, mechanics. With the rapid development of battery technology, electric machinery, and intelligent control areas, many advanced technologies have been applied to the field of mechanical engineering, such as rapid prototyping, numerical simulations, data-driven systems, evolutionary computation, and deep learning. Symmetry is a critical element in symmetry and renewable energy, e.g., vehicle devices, heavy machinery, and engineering machinery, and has been exploited in the design and optimization processes of materials, structures, and equipment. In the opinion of the Guest Editors, there are many theories and applications of advanced technologies in symmetry and renewable energy that also require the theory of symmetry.

This Special Issue on “Symmetry and Renewable Energy” aims to incorporate the latest research progress in the field of renewable energy that includes advanced materials, structures, and design methods. Topics include, but are not limited to, the following:

  • Rapid prototyping, analytical, and numerical simulation technologies of renewable energy;
  • Multiscale composite material selection technology;
  • Interdisciplinary application in intelligent and green manufacturing;
  • Performance analysis techniques for different key indicators of mechanical structures;
  • Multidisciplinary optimization methods of advanced mechanical structures;
  • Other related research topics.

Dr. Jianwei Tan
Prof. Dr. Guangdong Tian
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.

Keywords

  • symmetrical design and mechanism
  • symmetry and renewable energy
  • power grids

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Published Papers (1 paper)

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Research

21 pages, 5290 KiB  
Article
Dual-Motor Symmetric Configuration and Powertrain Matching for Pure Electric Mining Dump Trucks
by Yingshuai Liu, Chenxing Liu, Jianwei Tan and Yunli He
Symmetry 2025, 17(4), 583; https://doi.org/10.3390/sym17040583 - 11 Apr 2025
Viewed by 250
Abstract
The motor drive system is pivotal for vehicles, particularly in new energy applications. However, conventional hybrid systems, which combine generator sets and single batteries in parallel configurations, fail to meet the operational demands of large pure electric mining dump trucks under fluctuating power [...] Read more.
The motor drive system is pivotal for vehicles, particularly in new energy applications. However, conventional hybrid systems, which combine generator sets and single batteries in parallel configurations, fail to meet the operational demands of large pure electric mining dump trucks under fluctuating power requirements—such as high reserve power during acceleration and robust energy recovery during braking. Traditional single-motor configurations struggle to balance low-speed, high-torque operations and high-speed driving within cost-effective ranges, often necessitating oversized motors or multi-gear transmissions. To address these challenges, this paper proposes a dual-motor symmetric powertrain configuration with a seven-speed gearbox, tailored to the extreme operating conditions of mining environments. By integrating a high-speed, low-torque motor and a low-speed, high-torque motor through dynamic power coupling, the system optimizes energy utilization while ensuring sufficient driving force. The simulation results under extreme conditions (e.g., 33% gradient climbs and heavy-load downhill braking) demonstrate that the proposed configuration achieves a peak torque of 267 kNm (200% improvement over single-motor systems) and a system efficiency of 92.4% (vs. 41.7% for diesel counterparts). Additionally, energy recovery efficiency reaches 85%, reducing energy consumption to 4.75 kWh/km (83% lower than diesel trucks) and life cycle costs by 38% (USD 5.34/km). Field tests in open-pit mines validate the reliability of the design, with less than a 1.5% deviation in simulated versus actual performance. The modular architecture supports scalability for 60–400-ton mining trucks, offering a replicable solution for zero-emission mining operations in high-altitude regions, such as Tibet’s lithium mines, and advancing global efforts toward carbon neutrality. Full article
(This article belongs to the Special Issue Symmetry and Renewable Energy)
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