Resource Type

Journal Article 240

Conference Videos 1

Year

2023 17

2022 13

2021 17

2020 11

2019 7

2018 15

2017 20

2016 8

2015 10

2014 13

2013 11

2012 11

2011 4

2010 5

2009 16

2008 14

2007 15

2006 7

2005 3

2004 4

open ︾

Keywords

frequency 9

natural frequency 3

Algebraic Method (AGM) 2

Compressed sensing 2

Deep learning 2

Hilbert transform 2

Universal logic gate 2

dynamics 2

finite element method 2

frequency response 2

induction motor 2

mathematical model 2

prediction 2

ALK fusion 1

FAK6/7 1

in-situ maintenance 1

H∞ control 1

AC excited 1

AC-DC-AC converter 1

open ︾

Search scope:

排序： Display mode:

Electromagnetic interference modeling and suppression techniques in variable-frequency drive systems

Le YANG, Shuo WANG, Jianghua FENG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 3,   Pages 329-353 doi: 10.1007/s11465-018-0466-1

Abstract: Electromagnetic interference (EMI) causes electromechanical damage to the motors and degrades the reliability of variable-frequencyUnlike fundamental frequency components in motor drive systems, high-frequency EMI noise, coupled withinduction motors, motor bearings, and rectifier-inverters, are reviewed and evaluated in terms of applied frequency

Keywords： variable-frequency drive (VFD)     electromagnetic interference (EMI)     motor drive modeling     EMI noise suppression    

HTML PDF Collect

A Novel Variable Speed Constant Frequency Doubly Fed Salient Pole Synchronous Machine

Ning Yuquan

Strategic Study of CAE 2004, Volume 6, Issue 12,   Pages 27-31

Abstract:

This paper presents a novel variable speed constant frequency doubly fed salient pole synchronousIt deals with basic theory and construction of variable speed salient pole synchronous machines, especiallyon variable speed constant frequency characteristics.Variable frequency converter at rotor supplies the excitation winding.It makes machine to achieve good character of variable speed constant frequency.

Keywords： salient pole synchronous machines     doubly fed variable speed constant frequency     AC excited    

HTML PDF Collect

Dynamic contribution of variable-speed wind energy conversion system in system frequency regulation

Yajvender Pal VERMA, Ashwani KUMAR

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 184-192 doi: 10.1007/s11708-012-0185-y

Abstract: Frequency regulation in a generation mix having large wind power penetration is a critical issue, asThus, it is important that wind turbines also contribute to system frequency control.the short term transient active power support to the grid during transients and arrests the fall in frequencyThe frequency deviation is considered by the controller to provide the inertial control.The optimal speed control parameters have been used for the DFIG to increases its participation in frequency

Keywords： doubly fed induction generator (DFIG)     load frequency control     inertial control     wind energy conversion    

HTML PDF Collect

Efficiency Optimization of Variable Frequency Variable Speed Water-supply Pumping Stations Based on Genetic

Liao Li,Lin Jiaheng,Zhang Chenghui

Strategic Study of CAE 2002, Volume 4, Issue 9,   Pages 54-58

Abstract:

Water-supply enterprise consumes much of electric energy in the city, and the quantity it consumes mainly depends on the pumps of pumping stations. So it is important to optimize operation of water-supply pumping stations, for safety water supply and saving energy. This paper presents an optimal scheduling model of water-supply pumping stations based on approximation of exponent curve. Corresponding to the model, solutions based on genetic algorithm are introduced. The simulation resuls illustrate its validity.

Keywords： water-supply pumping station     approximation of numerical value     optimization     genetic algorithm    

HTML PDF Collect

Design of three phase induction motor with flame proof variable frequency used in scraper conveyor

He Huiming,Yang Xiaozhou,Xiao Hong,Fan Zuozhi,Qian Liang,Fan Guang

Strategic Study of CAE 2012, Volume 14, Issue 2,   Pages 59-68

Abstract:

This paper describes a new product, the flame-proof variable-frequencyThe motor is integrated with frequency converter to meet the requirement of high efficiency and energyAccording to the traditional electromagnetism calculation program, we add a new method for the variable-frequencymethod with ANSOFT 2D finite element to analyze and examine it, give a particular description of the frequency

Keywords： flame proof variable frequency     induction motor     construction design     electromagnetism calculation    

HTML PDF Collect

The status and outlook of wind power converters

Ma Weiming,Xiao Fei

Strategic Study of CAE 2011, Volume 13, Issue 1,   Pages 11-20

Abstract:

The power converter, which is one of the critical equipments of the system, must meet the requirements of high power density, high reliability and excellent control performance. Great development has been achieved in China about wind power converters, which is still lagging behind the advanced level of the world. In this paper, some critical technologies of direct driven wind power converter systems are introduced and the related design ideas are proposed.

Keywords： wind power generation     variable speed constant frequency     doubly fed induction generation system     direct    

HTML PDF Collect

Mechanical design, modeling, and identification for a novel antagonistic variable stiffness dexterous

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0691-5

Abstract: This study traces the development of dexterous hand research and proposes a novel antagonistic variablefinger mechanism not only achieves passive compliance against physical impacts, but also implements the variable

Keywords： multifingered hand     mechanism design     robot safety     variable stiffness actuator    

HTML PDF Collect

Effect of variable heat capacities on performance of an irreversible Miller heat engine

Xingmei YE

Frontiers in Energy 2012, Volume 6, Issue 3,   Pages 280-284 doi: 10.1007/s11708-012-0203-0

Abstract: Based on the variable heat capacities of the working fluid, the irreversibility coming from the compressionMoreover, the influence of the compression and expansion efficiencies, the variable heat capacities and

Keywords： Miller cycle     variable heat capacity     irreversibility     parametric optimization    

HTML PDF Collect

Analysis of planetary gear transmission in non-stationary operations

Fakher CHAARI, Mohamed Slim ABBES, Fernando Viadero RUEDA, Alfonso Fernandez del RINCON, Mohamed HADDAR

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 1,   Pages 88-94 doi: 10.1007/s11465-013-0361-8

Abstract:

Planetary gearboxes operate usually in non-stationary conditions generated mainly by variable loadsThe variability of load induces a variable speed of the transmission which is taken into account whenA combined amplitude and frequency modulation is observed which is well characterized using Short Time

Keywords： planetary gearbox     non-stationary conditions     variable load     dynamic response     time frequency analysis    

HTML PDF Collect

A neural network-based production process modeling and variable importance analysis approach in corn

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 3,   Pages 358-371 doi: 10.1007/s11705-022-2190-y

Abstract: In this paper, a neural network-based production process modeling and variable importance analysis approachUltimately, variable importance analysis is carried out by the extended weight connection method, and

Keywords： big data     corn to sugar factory     neural network     variable importance analysis    

HTML PDF Collect

On the improvement design of dynamic characteristics for the roller follower of a variable-speed plate

Hui Ching FAN, Hong Sen YAN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 1,   Pages 5-15 doi: 10.1007/s11465-012-0310-y

Abstract:

Without modifying the cam contour, a cam mechanism with a variable input speed trajectory offers an

Keywords： cam mechanism     variable input speed     kinematic design     dynamic design     optimal design    

HTML PDF Collect

A new variable-mode control strategy for LLC resonant converters operating in a wide input voltage range Article

Hui-pin LIN,Xiao-guang JIN,Liang XIE,Jin HU,Zheng-yu LU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 3,   Pages 410-422 doi: 10.1631/FITEE.1600029

Abstract: This paper proposes a new variable-mode control strategy that is applicable for LLC resonant convertersincorporates advantages from full-bridge LLC resonant converters, half-bridge LLC resonant converters, variable-frequencyWhen the input voltage is very low, it works in a full-bridge circuit and variable frequency mode (FB_VFWhen the input voltage further increases, it shifts into a half-bridge circuit and variable frequency

Keywords： LLC     Full bridge     Half bridge     Variable frequency     Phase shift     Wide input voltage range    

HTML PDF Collect

Mechanical design and analysis of a novel variable stiffness actuator with symmetrical pivot adjustment

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 711-725 doi: 10.1007/s11465-021-0647-1

Abstract: Thus, this paper aims to design a novel variable stiffness actuator (VSA) that can provide safer physicalVSA follows the idea of modular design, mainly including a variable stiffness module and a drive moduleThe variable stiffness module transmits the motion from the drive module in a roundabout manner, makingAs the key component of the variable stiffness module, a stiffness adjustment mechanism with a symmetrical

Keywords： variable stiffness actuator     variable stiffness module     drive module     symmetrical structure     double-deck    

HTML PDF Collect

Parametric study on the Multangular-Pyramid Concave Friction System (MPCFS) for seismic isolation

Wei XIONG, Shan-Jun ZHANG, Li-Zhong JIANG, Yao-Zhuang LI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1152-1165 doi: 10.1007/s11709-020-0659-7

Abstract: A series of comprehensive parametric studies are conducted on a steel-frame structure Finite-Element (FE) model with the Multangular-Pyramid Concave Friction System (MPCFS) installed as isolators. This new introduced MPCFS system has some distinctive features when compared with conventional isolation techniques, such as increased uplift stability, improved self-centering capacity, non-resonance when subjected to near-fault earthquakes, and so on. The FE model of the MPCFS is first established and evaluated by comparison between numerical and theoretical results. The MPCFS FE model is then incorporated in a steel-frame structural model, which is subjected to three chosen earthquakes, to verify its seismic isolation. Further, parametric study with varying controlling parameters, such as isolation foundation, inclination angle, friction coefficient, and earthquake input, is carried out to extract more detailed dynamic response of the MPCFS structure. Finally, limitations of this study are discussed, and conclusions are made. The simulations testify the significant seismic isolation of the MPCFS. This indicates the MPCFS, viewed as the beneficial complementary of the existing well-established and matured isolation techniques, may be a promising tool for seismic isolation of near-fault earthquake prone zones. This verified MPCFS FE model can be incorporated in future FE analysis. The results in this research can also guide future optimal parameter design of the MPCFS.

Keywords： seismic isolation     variable frequency     near-fault earthquake     numerical study     Multangular-Pyramid Concave    

HTML PDF Collect

Convective heat transfer in helical coils for constant-property and variable-property flows with high

Yufei MAO, Liejin GUO, Bofeng BAI, Ximin ZHANG

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 546-552 doi: 10.1007/s11708-010-0116-8

Abstract: Both constant-property flows at normal pressure and variable-property flows at supercritical pressure

Keywords： convective heat transfer     helical coils     high Reynolds number     supercritical pressure     variable property    

HTML PDF Collect

Title Author Date Type Operation

Electromagnetic interference modeling and suppression techniques in variable-frequency drive systems

Le YANG, Shuo WANG, Jianghua FENG

Journal Article

A Novel Variable Speed Constant Frequency Doubly Fed Salient Pole Synchronous Machine

Ning Yuquan

Journal Article

Dynamic contribution of variable-speed wind energy conversion system in system frequency regulation

Yajvender Pal VERMA, Ashwani KUMAR

Journal Article

Efficiency Optimization of Variable Frequency Variable Speed Water-supply Pumping Stations Based on Genetic

Liao Li,Lin Jiaheng,Zhang Chenghui

Journal Article

Design of three phase induction motor with flame proof variable frequency used in scraper conveyor

He Huiming,Yang Xiaozhou,Xiao Hong,Fan Zuozhi,Qian Liang,Fan Guang

Journal Article

The status and outlook of wind power converters

Ma Weiming,Xiao Fei

Journal Article

Mechanical design, modeling, and identification for a novel antagonistic variable stiffness dexterous

Journal Article

Effect of variable heat capacities on performance of an irreversible Miller heat engine

Xingmei YE

Journal Article

Analysis of planetary gear transmission in non-stationary operations

Fakher CHAARI, Mohamed Slim ABBES, Fernando Viadero RUEDA, Alfonso Fernandez del RINCON, Mohamed HADDAR

Journal Article

A neural network-based production process modeling and variable importance analysis approach in corn

Journal Article

On the improvement design of dynamic characteristics for the roller follower of a variable-speed plate

Hui Ching FAN, Hong Sen YAN

Journal Article

A new variable-mode control strategy for LLC resonant converters operating in a wide input voltage range

Hui-pin LIN,Xiao-guang JIN,Liang XIE,Jin HU,Zheng-yu LU

Journal Article

Mechanical design and analysis of a novel variable stiffness actuator with symmetrical pivot adjustment

Journal Article

Parametric study on the Multangular-Pyramid Concave Friction System (MPCFS) for seismic isolation

Wei XIONG, Shan-Jun ZHANG, Li-Zhong JIANG, Yao-Zhuang LI

Journal Article

Convective heat transfer in helical coils for constant-property and variable-property flows with high

Yufei MAO, Liejin GUO, Bofeng BAI, Ximin ZHANG

Journal Article