A5039848917- Sensorless Control of Electric Motors
- Electric Motor Design and Analysis
- Magnetic Bearings and Levitation Dynamics
- Iterative Learning Control Systems
- Higher Education and Teaching Methods
- Rock Mechanics and Modeling
- China's Socioeconomic Reforms and Governance
- MXene and MAX Phase Materials
- Hong Kong and Taiwan Politics
- biodegradable polymer synthesis and properties
- Web and Library Services
- Inorganic and Organometallic Chemistry
- Coal Properties and Utilization
- Advanced Photocatalysis Techniques
- Advanced battery technologies research
- Electrospun Nanofibers in Biomedical Applications
- Advanced Fiber Optic Sensors
- Educational Reforms and Innovations
- Geoscience and Mining Technology
- Evaluation Methods in Various Fields
- Supercapacitor Materials and Fabrication
- Synthesis and properties of polymers
- Library Science and Information Literacy
- Conducting polymers and applications
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Hunan First Normal University
2025
Hunan University
2007-2024
Yangzhou University
2008-2024
China University of Mining and Technology
2022
Yuzhang Normal University
2021
Jiangxi Transportation Research Institute
2021
Jiangxi Normal University
2021
Southwest Jiaotong University
2005-2020
Sungkyunkwan University
2015
Zhejiang Institute of Freshwater Fisheries
2015
Rotor position is the key information to achieve superior performance for sensorless control of interior permanent magnet synchronous motor (IPMSM). Nevertheless, back electromotive force (EMF) model-based estimation suffers from severe contamination fifth and seventh harmonics resulting inverter nonlinearity flux spatial harmonics. Therefore, an adaptive training control-based filter combined with a sliding-mode observer (SMO) presented rejection in estimated back-EMF, thus improving rotor...
The inverter nonlinearity and the flux spatial harmonics will lead to noticeable (6κ±1) in observed back electromotive force (EMF), causing (6κ) pulsations rotor position estimation error deteriorating performance of sensorless interior permanent magnet synchronous motor (IPMSM) drives. To improve IPMSM control accuracy, a multiple discrete adaptive filter (MDAF) embedded between sliding mode observer (SMO) normalized quadrature phase-locked loop (PLL) is adopted solve above problem this...
Accurate rotor position is significant for the back electromotive force (EMF)-based sensorless interior permanent-magnet synchronous motor (IPMSM) control. However, <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">±</i> (6 h±1)th harmonics will appear obviously in estimated back-EMF due to effect of inverter nonlinearity and flux spatial harmonics. These subsequently result h)th harmonic pulsation position. In order deal with this issue, a new...
Intended to stimulate interest in probing the interrelationship between press and social change China, this paper investigates some salient aspects of changes Chinese post-1989 years their implications for journalistic professionalization. It is argued that under hybrid system economic freedom political repression, journalism as a profession, while benefiting from changing information environment, suffers persistence Maoist theory nation-wide commercialization. further professionalization...
Hydrogen energy is widely considered the potential resource for conversion systems owing to its high density and pollution‐free nature. This review provides a comprehensive overview of recent advancements in heterostructured MXenes hydrogen production. The fundamental properties their unique contribution catalytic application are addressed, including synthesis strategies, interlayer modification, hybridization with other materials enhance performance. Comparative analysis highlights effect...
(1997). Broadcasting and Politics: Chinese television in the Mao Era, 1958–1976. Historical Journal of Film, Radio Television: Vol. 17, No. 4, pp. 563-574.
Voltage and flux model-based rotor estimation has been extensively applied in sensorless surface-mounted permanent magnet synchronous machines (SPMSMs) drives. Considering that the performance of position is undoubtedly influenced by dc offset from initial conditions, integration drift current measurements, which are serious threat to stable operation control system. To tackle with this problem, article proposed an improved observer suppress deviation estimation, using steepest descent...
With deep-buried depth, large span, high geo-stress, complex geological conditions, and its sections, the deformation behavior of Gaopo Tunnel is a three-dimensional problem. To reveal tunnel, this paper establishes model by benching tunnelling method, compares monitoring data to analyze surrounding rock variation stress field in support structure. The results demonstrate that layer inclination angle 4° 10°, gently inclined layered structure, with maximum horizontal principal direction close...
During the mining of coal seams with outburst hazard, abnormal gas emissions in front working face (CMWF) may induce overrun. To address this technical problem, study analyzed permeability variation CMWF at different stress paths through physical experiments, numerical simulation and on-site tests. The spatial-temporal evolution law unloading area under dual disturbance caused by hydraulic punching (HP) seam was explored; next, a secondary enhanced extraction technology proposed applied...
Accurate rotor position estimation is critical to ensure the high-performance operation of sensorless interior permanent magnet synchronous motor (IPMSM) drives. However, back electromotive force (BEMF) estimated by model-based observers usually nonideal, which may further degrade accuracy. In this article, a frequency-adaptive generalized comb filter (FAGCF) with quadrature phase-locked loop (PLL) adopted suppress errors filtering out dominant distortions in BEMF, including (6k±1)th...
Abstract Hexagonal boron nitride (BN), a well‐known member of 2D materials, has structure similar to graphene and is often referred as white graphene. Despite its unique physical chemical properties for energy storage applications, there have been very few studies on how BN stores anion carriers. Herein, the hybrid architecture mechanism nanosheets high‐performance full cells based dual‐ion Zinc (Zn) alkaline systems demonstrated. The bonding between reduced oxide (rGO) attributed formation...
Abstract The large‐scale industrialization of lithium metal (Li), as a potential anode for high energy density storage system, has been hindered by dendrite growth. construction an artificial solid electrolyte interphase layer featuring ionic and low electronic conductivity verified to be high‐performance strategy confine the growth promote Li stability. Therefore, functional organic protective is homogeneously deposited on surface via in situ chemical reaction between...