Article
Engineering, Multidisciplinary
Doha Mustafa, Hussain A. Hussain
Summary: A magnetic lead screw (MLS) is a device that converts between linear and rotational motions using the magnetic field of permanent magnets, achieving a gearing action. This paper provides a comprehensive review of state-of-the-art MLS designs and manufacturing aspects. It discusses the computation of thrust force and torque, analyzes the main parameters and factors affecting MLS performance, and explores machine integration and control. Additionally, different types of MLSs are designed and compared based on 3-D finite element analysis.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Article
Automation & Control Systems
Zhijian Ling, Wenxiang Zhao, Peter Omand Rasmussen, Jinghua Ji, Yang Jiang, Zhengmeng Liu
Summary: This article proposes a practical design guide for a linear electromagnetic actuator based on the concept of magnetic screw transmission, investigating manufacturing and assembly technologies. Different topologies are developed using 3-D finite-element analysis, aiming to optimize thrust force, and a prototype is built to verify the theoretical analysis on a linear test bench. The design focuses on decoupling magnetic circuits with a self-shielding effect of Halbach PM array and special bearing supports to avoid eccentricity.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Multidisciplinary
Lang Bu, Yasutaka Fujimoto
Summary: This article proposes a method to accurately estimate the load force of magnetic lead screw-based series elastic actuators in real time. The method models the nonlinear force characteristic of the lead screw and predicts the magnetic force hysteresis phenomenon. It also introduces a method to detect magnetic pole distortion and compensate for force estimation errors. Experimental results demonstrate the accuracy of the proposed method.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Akira Heya, Yoshihiro Nakata, Hiroshi Ishiguro, Katsuhiro Hirata
Summary: Magnetic lead screws (MLSs) are a new type of transmission device that offers higher efficiency and reduces noise and heat generation compared to traditional mechanical screws. This study investigates the performance and productivity of MLSs without spiral permanent magnets through magnetic field analysis.
IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING
(2021)
Article
Automation & Control Systems
Bryton Praslicka, Matthew Johnson, Erik Plugge, Nick Palmer, Donald F. Knight, Adam White, Thomas Simms, Daniel Zamarron, Hamid A. Toliyat
Summary: Magnetic gears offer a noncontact solution for high precision and high reliability applications. In this study, cycloidal magnetic gears (CyMGs) are compared to surface permanent magnet (SPM) CyMGs, with a focus on optimizing the design and reducing manufacturing costs. The results show that CyMGs with consequent pole (CP) topology have higher torque densities and can integrate commercial-off-the-shelf magnets for a low-cost, high-performance gearbox. Furthermore, a prototype of CP CyMG is fabricated and tested at extremely high input speeds, setting a record for magnetic gears.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Computer Science, Information Systems
Tao Xia, Junhui Li, Yangfei Zhang, Haitao Yu, Kaiyuan Lu
Summary: In this paper, a magnetic lead screw (MLS) is introduced as a speed-increasing device in a wave energy converter (WEC) to improve the power density. The electromagnetic performances of several optimized MLSs with different topologies are investigated and evaluated using finite element analysis (FEA) and measurements. The results show that the optimized MLS significantly improves the power density and output power.
Article
Multidisciplinary Sciences
Sihui Dong, Shiqun Li, Shenghui Fu, Kang Wang
Summary: This study conducted structural analysis and optimization of a tractor gearbox using 3D modeling software and ANSYS Workbanch. The results showed that the optimized gearbox had reduced weight, decreased deformation, and equivalent stress. These improvements enhanced the strength and stiffness of the gearbox, reduced resource waste, and improved heat dissipation performance and fracture resistance.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Electrical & Electronic
Hongbin Zhang, Zhike Xu, Long Jin, Jingwen Leng, Haitao Yu, Zhan Shen, Boyang Ye, Shuhua Fang
Summary: This article proposes an electromagnetic calculation method for the tubular permanent magnet linear oscillation actuator (TPMLOA). The improved topology of the TPMLOA is introduced, and the actual air gap length is derived using the radially laminated stator and equivalent magnetic circuit method. The electromagnetic characteristic of the TPMLOA is analyzed using 2-D finite-element analysis, and the results are compared with normal 2-D and 3-D FEA results. A prototype is also tested to verify the accuracy of the calculated results. The proposed method can quickly and accurately calculate the electromagnetic performance.
IEEE TRANSACTIONS ON MAGNETICS
(2023)
Article
Automation & Control Systems
Sofiane Ghenna, Yves Bernard, Laurent Daniel
Summary: This paper presents the design and experimental analysis of a compact piezo-motor with high blocking and driving forces. The motor overcomes difficulties related to flexibility and blocking force through its innovative design inspired by the inchworm motion and use of piezoelectric actuators. The motor achieves a speed of 2.25 μm/s and features a weight of 78 g and dimensions of 100 mm x 16 mm x 7 mm. Experimental methods for verifying theoretical force and measuring friction coefficient are proposed.
Article
Mechanics
X. Lu, X. M. Guo
Summary: In this study, a non-local continuum damage model is developed to analyze the progressive failure of laminated composites. The model incorporates an orthotropic non-local integral strategy with two internal length scales, allowing for accurate predictions of damage evolution. Additionally, an interactive damage transfer scheme is proposed to capture the interaction between matrix cracking and interface delamination. The model demonstrates superior performance over conventional methods in predicting the complex failure mechanisms of composite laminates.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Composites
Gianluca Parodo, Felice Rubino, Luca Sorrentino, Sandro Turchetta
Summary: The aim of this study is to monitor the temperature during the dry drilling of fiber metal laminates used in the aviation field and analyze the influence of cutting speed on temperature trends. Experimental results show that increasing the spindle speed can reduce the temperatures on the tool and flank, and the thermal properties of carbon and glass fibers play a significant role in temperature distribution.
POLYMER COMPOSITES
(2022)
Article
Critical Care Medicine
Zhirong Fan, Yongquan Huang, Haitao Su, Tao Jiang
Summary: The optimal approach for the treatment of femoral neck fractures remains debated. A new internal fixation femoral neck system (FNS) was developed and tested for biomechanical outcomes in unstable fractures. Results indicate that single-hole or double-hole locking plated FNS can be used for fractures with angles less than 60 degrees, while a double-hole locking plated FNS is recommended for angles greater than 70 degrees.
INJURY-INTERNATIONAL JOURNAL OF THE CARE OF THE INJURED
(2021)
Article
Engineering, Multidisciplinary
T. Nagoshi, Y. Harada, S. Nakasumi, N. Yamazaki, K. Hasegawa, K. Takagi, W. Peng, G. Fujii, M. Ohkubo
Summary: Cohesive failure in the epoxy adhesive layers of carbon-fiber-reinforced plastic (CFRP) joints is a perplexing issue. This study reveals that micrometer-scale defects may contribute to the occurrence of cohesive failure and proposes a new phenomenological model to explain this behavior. These findings are of significant importance for enhancing the reliability of CFRP components.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Composites
Royson Donate Dsouza, Donato Di Vito, Jarno Jokinen, Mikko Kanerva
Summary: The accurate determination of interfacial strength in composites is a significant challenge due to the complexity of the microbond (MB) test. This study provides a thorough analysis of the MB test through finite element simulations and identifies residual stresses as an important factor affecting the results.
POLYMER COMPOSITES
(2023)
Article
Engineering, Electrical & Electronic
Vladimir Kuptsov, Poria Fajri, Md. Rasheduzzaman, Salvador Magdaleno-Adame, Konstantin Hadziristic
Summary: This article presents a new method for combined levitation and propulsion control in maglev/Hyperloop systems using a combination of AC and DC modes of operation for asymmetric double-sided linear induction motors (ADSLIMs). The proposed control strategy allows for simultaneous control of thrust and lift forces, improving operating efficiency.
Article
Engineering, Multidisciplinary
Mojtaba Bahrami Kouhshahi, Jonathan Z. Bird, Vedanadam M. Acharya, Kang Li, Matthew Calvin, Wesley Williams, Sina Modaresahmadi
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2020)
Article
Engineering, Electrical & Electronic
Jeong-In Lee, Kyung-Hun Shin, Sung-Won Seo, Tae-Kyoung Bang, Seung-Ho Shin, Kyong-Hwan Kim, Jonathan Bird, Jang-Young Choi
Summary: This study analyzed and verified the electromagnetic performance and thrust characteristics of linear magnetic gears using subdomain-based analytical methods, by simplifying the analytical model and calculating the governing equations for each domain. It focused on the importance of force characteristics in magnetic gears, which were calculated using undetermined coefficients and the Maxwell stress tensor.
IEEE TRANSACTIONS ON MAGNETICS
(2021)
Article
Engineering, Mechanical
Sina Modaresahmadi, David Barnett, Hossein Baninajar, Jonathan Z. Bird, Wesley B. Williams
Summary: This study proposes a method to accurately model the deflection of laminated structures, which can be computed in a shorter time and compared with experimental results. The method is used to assess the magnetic and mechanical advantages of different designs for the modulating pieces of a magnetic gear.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Energy & Fuels
Simon Staal Nielsen, Ho Yin Wong, Hossein Baninajar, Jonathan Z. Bird, P. O. Rasmussen
Summary: This paper examines the impact of cogging torque and unbalanced radial magnetic forces on vibrations and acoustic noise properties in concentric magnetic gears through three physical demonstrators with unique properties. It shows how these factors dominate the acoustic and vibrational properties and affect the sensitivity of the magnetic gears to system eigenfrequencies.
IEEE TRANSACTIONS ON ENERGY CONVERSION
(2022)
Article
Engineering, Electrical & Electronic
Jonathan Z. Bird
Summary: This article reviews the power density and torque density of permanent magnet motor technology in electric aircraft, and suggests using magnetic gearing and an integrated contra-rotating motor propeller co-design approach to increase propulsive thrust performance and overall power density.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Engineering, Multidisciplinary
Hossein Baninajar, Sina Modaresahmadi, Ho Yin Wong, Jonathan Bird, Wesley Williams, Bertrand Dechant
Summary: This article presents the electromagnetic and mechanical design, as well as experimental testing results for a 9.5:1 gear ratio, series connected, coaxial magnetic gear (MG) for use in a marine hydrokinetic generator. The unique slotted Halbach magnet arrangement used in this design enables high torque density, as shown by experimental results.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Hossein Baninajar, Sina Modaresahmadi, Ho Yin Wong, Jonathan Z. Bird, Wesley Williams, Bertrand DeChant, Parker Southwick
Summary: This article presents the design and analysis of a 7.67:1 gear ratio magnetic gear for a wave energy converter, which achieved high efficiency and torque density through a unique rotor topology and the use of laminated magnets and low-loss electrical steel.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Editorial Material
Engineering, Electrical & Electronic
Gorazd Stumberger, Damir Zarko, Jonathan Bird
IET ELECTRIC POWER APPLICATIONS
(2022)
Article
Energy & Fuels
H. Baninajar, S. Modaresahmadi, H. Y. Wong, J. Z. Bird, W. Williams, B. Dechant
Summary: This paper presents the construction and testing results for a 63.3:1 dual-stage coaxial magnetic gear used in a marine hydrokinetic generator demonstrator application. The dual-stage magnetic gear consists of series-connected coaxial magnetic gears. The gear ratios of the two stages are 9.5:1 and 6.67:1, respectively, and the magnetic gear exhibits high torque density and efficiency.
IEEE TRANSACTIONS ON ENERGY CONVERSION
(2023)
Article
Energy & Fuels
Ho Yin Wong, Hossein Baninajar, Bertrand W. W. Dechant, Parker Southwick, Jonathan Z. Z. Bird
Summary: This paper presents the design, analysis, and experimental testing results of a 5.67:1 Halbach rotor magnetic gear with a ferromagnetic back support. The testing results of two different support designs, rectangular modulation supports and bridgeless circular modulation support rod, are evaluated. The presented design demonstrates the capability to operate with a peak torque of 189 Nm and an active region torque density of 279.3 Nm/L.
IEEE TRANSACTIONS ON ENERGY CONVERSION
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
H. Y. Wong, J. Z. Bird, S. Essakiappan, A. Verma, M. Manjrekar
Summary: This paper presents a preliminary electromagnetic analysis of a 1:20 gear ratio coaxial magnetic gear (MG) motor for electric vehicle traction. Both 2-D and 3-D finite element analyses (FEA) are used in the electromagnetic design study, and it is shown that minimizing losses can enable high-speed operation and high overall torque density for the MG motor.
2022 25TH INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS 2022)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Colton Bruce, Jonathan Bird, Matthew Grubbs, Zhongkai Zheng, David Drake, Anh Doane, Yew Tin Lee, Jon Seeboth
Summary: This paper reports on the electromagnetic analysis and experimental testing of a newly invented six-degree of freedom electrodynamic wheel magnetic levitation vehicle that can stably levitate over a passive low-cost U-guideway. The study shows that in addition to providing lateral recentering force, the U-guideway can also increase thrust and lift force.
2022 25TH INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS 2022)
(2022)
Proceedings Paper
Green & Sustainable Science & Technology
Dawei Che, Jonathan Z. Bird, Alex Hagmuller, Md Emrad Hossain
Summary: This paper introduces a new type of adjustable stiffness torsional magnetic spring designed for ocean generator application, showing its linear adjustable stroke length through experimental testing. The torsional spring is capable of achieving a +/- 45 degrees angular stroke range, with the possibility of extending the stroke length to +/- 90 degrees through a series spring arrangement.
2021 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)
(2021)
Proceedings Paper
Green & Sustainable Science & Technology
Md Emrad Hossain, Jonathan Z. Bird, Victor Albarran, Dawei Che
Summary: This paper introduces a new type of variable stiffness magnetic spring, which consists of radially magnetized outer rotor magnets and axially magnetized inner cylindrical magnets to achieve highly linear stroke length. The stiffness of the spring can be adjusted by rotating the inner magnetic rotor. The force as a function of stroke length and torque required for adjusting the stiffness were computed using finite element analysis and verified through experimental tests.
2021 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Ho Yin (David) Wong, Jonathan Z. Bird
Summary: This paper demonstrates that high torque density can be achieved in a coaxial magnetic gear system with a high gear ratio by selecting the right radius and conducting careful radial parameter sweep analysis. An example design with a 33:1 gear ratio and torque density exceeding 300 Nm/L is presented, along with a direct comparison of torque density between the Halbach rotor MG and the surface mounted permanent magnet MG.
2021 IEEE INTERNATIONAL MAGNETIC CONFERENCE (INTERMAG)
(2021)
