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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    

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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    

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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    

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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    

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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    

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Transient process of methane-oxygen diffusion flame-street establishment in a microchannel

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 988-999 doi: 10.1007/s11708-021-0755-y

Abstract: “Flame-street” is an interesting diffusion flame behavior in which a series of flame-segments is separatelywas experimentally and numerically investigated with the focus on the steady-state, thermo-chemical flameIn the present paper, the dynamic formation process of a methane-oxygen diffusion flame-street structureInterestingly, different propagation features were observed for the three flame segments: The leadingflame experienced a flame shape/type change from a tribrachial structure in its fast-propagating phase

Keywords： micro-combustion     flame-street     diffusion flame     mixing layer     flame propagation speed    

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A new proof of Honeycomb Conjecture by fractal geometry methods

Tong ZHANG, Kai DING

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4,   Pages 367-370 doi: 10.1007/s11465-013-0273-7

Abstract:

Based on fractal geometry, we put forward a concise and straightforward method to prove Honeycomb Conjecture—a classical mathematic problem. Hexagon wins the most efficient covering unit in the two- dimensional space, compared with the other two covering units—triangle and square. From this point of view, honeycomb is treated as a hierarchical fractal structure that fully fills the plane. Therefore, the total side length and area are easily calculated and from the results, the covering efficiency of each possible unit is provided quantitatively.

Keywords： Honeycomb Conjecture     fractal geometry     hierarchical fractal structure    

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NC flame pipe cutting machine tool based on open architecture CNC system

Xiaogen NIE, Yanbing LIU

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 2,   Pages 147-152 doi: 10.1007/s11465-009-0025-x

Abstract: Based on the analysis of the principle and flame movement of a pipe cutting machine tool, a retrofitNC flame pipe cutting machine tool (NFPCM) that can meet the demands of cutting various pipes is proposed

Keywords： flame pipe cutting     flame incision tracks     CNC     open architecture CNC system    

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Experimental study on the laminar flame speed of hydrogen/natural gas/air mixtures

Chen DONG, Qulan ZHOU, Xiaoguang ZHANG, Qinxin ZHAO, Tongmo XU, Shi’en HUI

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 417-422 doi: 10.1007/s11705-010-0515-8

Abstract: Laminar flame speeds of hydrogen/natural gas/air mixtures have been measured over a full range of fuelHigh sensitivity scientific CCD camera is use to capture the image of laminar flame.The reaction zone area is employed to calculate the laminar flame speed.The laminar flame speeds of hydrogen/air mixture and natural gas/air mixture reach their maximum valuesUsing these formulas, the laminar flame speed at different hydrogen fractions and equivalence ratios

Keywords： laminar flame speed     experimental study     Bunsen flame    

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Experimental and kinetic study on laminar flame speeds of ammonia/syngas/air at a high temperature and

Frontiers in Energy 2022, Volume 16, Issue 2,   Pages 263-276 doi: 10.1007/s11708-021-0791-7

Abstract: The laminar flame speeds of ammonia mixed with syngas at a high pressure, temperature, and different

Keywords： ammonia mixed with syngas     laminar flame speed     kinetic model     sensitivity analysis     pathway analysis    

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Molybdenum disulfide@nickel phyllosilicate hybrid for improving the flame retardancy and wear resistance

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 2114-2126 doi: 10.1007/s11705-023-2357-1

Abstract: The thermal stability, flame retardancy, and frictional performances of epoxy composites were studied

Keywords： molybdenum disulfide     nickel phyllosilicate     epoxy resin     flame retardancy    

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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    

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A low-density polyethylene composite with phosphorus-nitrogen based flame retardant and multi-walledcarbon nanotubes for enhanced electrical conductivity and acceptable flame retardancy

Yong Luo, Yuhui Xie, Renjie Chen, Ruizhi Zheng, Hua Wu, Xinxin Sheng, Delong Xie, Yi Mei

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1332-1345 doi: 10.1007/s11705-021-2035-0

Abstract: Design and exploitation of flame retardant polymers with high electrical conductivity are desired forHerein, a novel phosphorus-nitrogen intumescent flame retardant was synthesized from pentaerythritolLow-density polyethylene was combined with the flame retardant and multi-walled carbon nanotubes to formThe electrical conductivity, mechanical properties, thermal performance, and flame retardancy of theFurthermore, the combination of multi-walled carbon nanotubes and phosphorus–nitrogen flame retardant

Keywords： MWCNTs     PEPA     electrical conductivity     flame retardant     low density polyethylene    

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A method of determining flame radiation fraction induced by interaction burning of tri-symmetric propane

Jie JI, Junrui DUAN, Huaxian WAN

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 1017-1026 doi: 10.1007/s11708-020-0716-x

Abstract: The interaction of multiple fires may lead to a higher flame height and more intense radiation flux thana single fire, which increases the possibility of flame spread and risks to the surroundings.For non-merging flames ( / >0.368), the flame height is almost identical to a single fire; for merging), a quantitative analysis of the flame height, merging point height, and air entrainment was formed,and the calculated merging flame heights show a good agreement with the measured experimental values

Keywords： flame interaction     air entrainment     flame height     multi-point source model     thermal radiation    

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Flame-retardant properties of

Kumar Sai SMARAN, Rajashekar BADAM, Raman VEDARAJAN, Noriyoshi MATSUMI

Frontiers in Energy 2019, Volume 13, Issue 1,   Pages 163-171 doi: 10.1007/s11708-018-0554-2

Abstract: LiPF in 1:1 ethylene carbonate (EC): dimethyl carbonate (DMC) {1 M LiPF -EC: DMC}, in terms of their flameNaked flame tests confirm that the organic-inorganic hybrid electrolytes are less susceptible to flamesTherefore, these hybrids are only oxidized when subjected to a flame unlike other commercial electrolytes

Keywords： borosilicate network     organic-inorganic hybrids     self-extinguishability     nonflammability     lithium batteries     flame-retardants    

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Title Author Date Type Operation

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

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

Transient process of methane-oxygen diffusion flame-street establishment in a microchannel

Journal Article

A new proof of Honeycomb Conjecture by fractal geometry methods

Tong ZHANG, Kai DING

Journal Article

NC flame pipe cutting machine tool based on open architecture CNC system

Xiaogen NIE, Yanbing LIU

Journal Article

Experimental study on the laminar flame speed of hydrogen/natural gas/air mixtures

Chen DONG, Qulan ZHOU, Xiaoguang ZHANG, Qinxin ZHAO, Tongmo XU, Shi’en HUI

Journal Article

Experimental and kinetic study on laminar flame speeds of ammonia/syngas/air at a high temperature and

Journal Article

Molybdenum disulfide@nickel phyllosilicate hybrid for improving the flame retardancy and wear resistance

Journal Article

The status and outlook of wind power converters

Ma Weiming,Xiao Fei

Journal Article

A low-density polyethylene composite with phosphorus-nitrogen based flame retardant and multi-walledcarbon nanotubes for enhanced electrical conductivity and acceptable flame retardancy

Yong Luo, Yuhui Xie, Renjie Chen, Ruizhi Zheng, Hua Wu, Xinxin Sheng, Delong Xie, Yi Mei

Journal Article

A method of determining flame radiation fraction induced by interaction burning of tri-symmetric propane

Jie JI, Junrui DUAN, Huaxian WAN

Journal Article

Flame-retardant properties of

Kumar Sai SMARAN, Rajashekar BADAM, Raman VEDARAJAN, Noriyoshi MATSUMI

Journal Article