Lei Xu

ORCID: 0000-0001-8994-5075
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About
Contact & Profiles
Research Areas
  • Electric Motor Design and Analysis
  • Magnetic Bearings and Levitation Dynamics
  • Sensorless Control of Electric Motors
  • Magnetic Properties and Applications
  • Multilevel Inverters and Converters
  • Induction Heating and Inverter Technology
  • Advanced MEMS and NEMS Technologies
  • Mechanical and Optical Resonators
  • Acoustic Wave Resonator Technologies
  • Advanced DC-DC Converters
  • Magnetic Field Sensors Techniques
  • Microgrid Control and Optimization
  • Advanced Battery Technologies Research
  • Superconducting Materials and Applications
  • Geophysical and Geoelectrical Methods
  • Cancer-related gene regulation
  • Industrial Technology and Control Systems
  • Integrated Energy Systems Optimization
  • Antenna Design and Analysis
  • Thermodynamic and Exergetic Analyses of Power and Cooling Systems
  • Geophysical Methods and Applications
  • Wind Turbine Control Systems
  • Non-Destructive Testing Techniques
  • Electric and Hybrid Vehicle Technologies
  • Innovative Energy Harvesting Technologies

Jiangsu University
2014-2025

Southeast University
2010-2025

Huazhong University of Science and Technology
2011-2024

Tongji Hospital
2024

Union Hospital
2022

Karlsruhe Institute of Technology
2021

Naval University of Engineering
2021

China University of Mining and Technology
2020

Xi’an University
2018

Chongqing University of Technology
2010

In this article, a parallel-series magnetic circuit multi-permanent magnet (M-PM) motor is designed and optimized considering characteristic variation effects, where two kinds of permanent magnets (PMs) are utilized as co-magnetic. Based on the equivalent method, detailed design method for M-PM illustrated. Considering various operation conditions in potential electric vehicle applications, <italic xmlns:mml="http://www.w3.org/1998/Math/MathML"...

10.1109/tie.2021.3073311 article EN IEEE Transactions on Industrial Electronics 2021-04-21

A comparative study of new partitioned stator hybrid excitation axial flux switching permanent magnet (HEAFSPM) motors with different topologies for in-wheel traction applications is presented in this paper. The realization approaches the HEAFSPM motor are discussed, and topology windings magnets (PMs) separately setting on stators selected view advantageous structure thermal management. On basis, two including C-type tooth core T-type configuration proposed, air-gap modulation regulation...

10.1109/tec.2021.3130475 article EN IEEE Transactions on Energy Conversion 2021-11-24

Nowadays, with increasing concerns about environmental pollution and energy crisis electric vehicles are rapidly developing owing to their significant environmental-friendly benefits. To meet the diverse driving requirements of vehicles, PM motors high-performance rare-earth PMs have been widely employed in vehicle powertrains, which shows performance merits high power density efficiency. Yet, PMs, as non-renewable strategic resources, usually suffer from unstable supply fluctuation prices,...

10.1016/j.geits.2022.100012 article EN cc-by-nc-nd Green Energy and Intelligent Transportation 2022-06-01

This article proposes a multiple mode current (MMC) control for hybrid-excitation axial flux switching permanent magnet (HE-AFSPM) motors considering driving cycles. To satisfy the diverse and compound demands in operating condition of electric vehicles, model predictive is adopted, vector prediction method including <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">d</i> -axis current, xmlns:xlink="http://www.w3.org/1999/xlink">q</i> dc...

10.1109/tie.2023.3243278 article EN IEEE Transactions on Industrial Electronics 2023-02-14

Abstract Background N4‐acetylcytidine (ac4C) represents a novel messenger RNA (mRNA) modification, and its associated acetyltransferase N‐acetyltransferase 10 (NAT10) plays crucial role in the initiation progression of tumors by regulating mRNA functionality. However, hepatocellular carcinoma (HCC) development prognosis is largely unknown. This study aimed to elucidate NAT10‐mediated ac4C HCC provide promising therapeutic approach. Methods The levels were evaluated dot blot ultra‐performance...

10.1002/cac2.12595 article EN cc-by-nc-nd Cancer Communications 2024-07-19

In this article, a new controllable leakage flux multilayer barrier permanent magnet (PM) motor is proposed by adopting design concept of flux, where the PMs are uniquely placed in d-axis magnetic circuit synchronous reluctance (SynRM). Compared to conventional q-axis PM placement SynRM, higher utilization and better flux-weakening capability can be obtained. For further comparison verification, both with traditional setting designed. addition, multiobjective optimization method based on...

10.1109/tie.2020.3016253 article EN IEEE Transactions on Industrial Electronics 2020-08-18

This article reveals the flux leakage design and modeling principle of a controllable permanent magnet (FLC-PM) machine by considering driving cycles. The key is to obtain relationship between characteristics multiple operating conditions. Based on concept, an FLC-PM with artfully designed region proposed. investigated analyzing magnetic circuit in factor introduced characterize variable field On this basis, mathematical model deduced, are studied detail. In order evaluate presented machine,...

10.1109/tie.2021.3116588 article EN IEEE Transactions on Industrial Electronics 2021-10-07

This article proposes a novel pole-changing (PC) permanent magnet (PM) Vernier machine (PC-PMVM), in which an unevenly distributed modulation tooth structure is adopted the stator, and set of three-phase PC-winding installed stator slots. On rotor, surface-mounted PMs are to generate PM excitation field. First, topology design principle PC-PMVM discussed for purpose PC, based on 12/34-pole proposed. The analytical analysis shows that there series working harmonics air-gap can be grouped into...

10.1109/tie.2022.3198237 article EN IEEE Transactions on Industrial Electronics 2022-08-22

In this paper, a new flux-intensifying fault-tolerant permanent magnet synchronous motor (FI-FTPMSM) is proposed to improve sensorless operating capacity under multimode operation including fault conditions. Most previous studies regarding motors aim capability but suffer the saliency characteristic problem, which unfavorable for control. study, an active strategy developed by considering in design stage. Based on novel idea, FI-FTPMSM with high inverse ratio designed. By carefully choosing...

10.1109/tec.2023.3241177 article EN IEEE Transactions on Energy Conversion 2023-01-31

Abstract This paper proposes a new low‐noise sensorless control strategy for the permanent magnet synchronous motor (PMSM) drives to tackle audible noise caused by high‐frequency injection method. The traditional reduction methods face limitation in improving estimated accuracy of rotor position due signal delay with fixed frequency signal. To overcome this issue, is developed, which consists two parts. First, proposed variable‐frequency voltage signal, significant can be achieved its...

10.1049/elp2.12538 article EN cc-by-nc-nd IET Electric Power Applications 2025-01-07

This paper investigates a double stator linear rotary permanent magnet motor (DSLRPMM) with orthogonally arrayed PMs. The DSLRPMM, which involves and/or movements, is constituted of two stators and hollow mover. aim this to study the electromagnetic features optimize design parameters using 3-D finite-element method (FEM). topology operating principle are described, original given. influences main designed on torque, force, total losses also analyzed. optimal given prototype built tested....

10.1109/tmag.2016.2527634 article EN IEEE Transactions on Magnetics 2016-02-11

This paper presents a new asymmetrical rotor hybrid permanent-magnet (AR-HPM) motor with good torque performances. Different from the traditional symmetrical structure, structure is employed to improve production. makes reluctance and magnetic reach maximum at same current phase angle. Based on concepts, investigated by finite-element method (FEM). The frozen permeability (FPM) applied divide into torque. electromagnetic characteristics performances of are compared conventional motor....

10.1109/tasc.2019.2893708 article EN IEEE Transactions on Applied Superconductivity 2019-01-17

In this article, a radial-electromagnetic-force-harmonic-oriented design methodology is proposed to suppress motor vibration. the methodology, radial-electromagnetic-force harmonics innovatively act as effective bridge between structural field and vibration performance. And avoiding low-order large-amplitude premise of designing low-vibration permanent magnet (PM) motors. For extensive investigation, 36-slot/8-pole interior PM (IPM) with different winding configurations variable rotor...

10.1109/tie.2023.3262863 article EN IEEE Transactions on Industrial Electronics 2023-04-04

In this paper, a double-stator permanent-magnet motor that involves linear and/or rotary movements is investigated. The linear–rotary (DSLRPMM) constituted of two stators and hollow mover with permanent magnets affixed on its surfaces. This paper focuses the main electric magnetic features DSLRPMM. First, structure operating principles are described, original design also given. Then, electromagnetic characteristics, including fluxes, torques, forces, etc., studied owing to three-dimensional...

10.1109/tasc.2016.2517018 article EN IEEE Transactions on Applied Superconductivity 2016-01-13

Abstract The electrification of the transport sector plays a key role in global energy transition and it is great necessity to assess emissions induced by electric vehicles long term for effective policy‐making. Typical life cycle assessment may not consider impact vehicle integration future electricity systems adequately, or time‐dependent characteristics generation mix EV charging patterns. solution requires modeling methods integrate into system models, especially with vehicle‐to‐grid...

10.1111/jiec.13200 article EN Journal of Industrial Ecology 2021-09-17

This work reports a multiple-parameter decoupling (MPD) method based on resonant MEMS sensors subject to blue-sideband excitation (BSE), thus enabling simultaneous separation of the cross-coupled physical quantities, e.g. acceleration and temperature, single sensor. Such technique exploits property BSE that multiple vibration modes resonator can be excited at same time. The proposed MPD algorithm is applied two distinct sensors, i.e. base-line electrostatic force sensor, vacuum-packaged...

10.1109/jmems.2023.3293464 article EN Journal of Microelectromechanical Systems 2023-07-19

Abstract Coumarin derivatives are highly valuable compounds in drug discovery. Herein, we have developed two new coupling reactions that involve coumarins and either aldehydes or di‐ tert ‐butyl peroxide (DTBP) the presence of inexpensive copper iron catalysts. Both these proceed through a C(sp 2 )–H functionalization process to regioselectivity generate keto‐ methyl‐substituted coumarin moderate good yields These will enrich current chemistry.

10.1002/ejoc.201501251 article EN European Journal of Organic Chemistry 2015-11-24
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