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Power control of dual-motor electric drive for tracked vehicles

Yuan ZOU, Chengning ZHANG, Fengchun SUN, Jingbo WU,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1, Pages 67-72 doi: 10.1007/s11465-009-0059-0

Abstract: The fundamental problem of the power control for the driving of a dual-motor drive electric tracked vehicleThe tracked vehicle and its electric drive system are mathematically modeled.Power control schemes of the dual-motor drive system is put forward, designed, and analyzed, includingThe field experiment shows that the two types of drive control schemes realize the driving function of

Keywords： control electric drive tracked vehicle

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Overview of condition monitoring and operation control of electric power conversion systems in direct-drive

Shoudao HUANG, Xuan WU, Xiao LIU, Jian GAO, Yunze HE

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3, Pages 281-302 doi: 10.1007/s11465-017-0442-1

Abstract:

Electric power conversion system (EPCS), which consists of a generator and power converter, is oneof the most important subsystems in a direct-drive wind turbine (DD-WT).

Keywords： direct-drive wind turbine electric power conversion system condition monitoring fault diagnosis operation

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The Drive for Electric Motor Innovation

Chris Palmer

Engineering 2022, Volume 8, Issue 1, Pages 9-11 doi: 10.1016/j.eng.2021.11.007

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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: EMI) causes electromechanical damage to the motors and degrades the reliability of variable-frequency driveUnlike fundamental frequency components in motor drive systems, high-frequency EMI noise, coupled with

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

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An investigation into the vibration of harmonic drive systems

M. Masoumi, H. Alimohammadi

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4, Pages 409-419 doi: 10.1007/s11465-013-0275-5

Abstract:

Harmonic drive systems are precise and specific transmission gear systems which are beneficial inThis paper presents a vibration analysis of harmonic drive systems using the shell theory.

Keywords： harmonic drive system strain wave gearing mechanism vibration analysis natural frequencies

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SCRaMbLE drive application of synthetic yeast genome

Jin Jin, Yuan Ma, Duo Liu

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4, Pages 832-834 doi: 10.1007/s11705-018-1749-0

Abstract:

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Effects of elastic support on the dynamic behaviors of the wind turbine drive train

Shuaishuai WANG, Caichao ZHU, Chaosheng SONG, Huali HAN

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3, Pages 348-356 doi: 10.1007/s11465-017-0420-7

Abstract: flexibilities of the planet carrier and the housing, a coupled dynamic model was developed for a wind turbine driveThen, the dynamic behaviors of the drive train for different elastic support parameters were computedwere used to examine how different elastic support parameters influence the dynamic behaviors of the drivethat the elastic support parameters considerably influenced the dynamic behaviors of the wind turbine drivethis study provide the foundation for optimizing the elastic support stiffness of the wind turbine drive

Keywords： wind turbine drive train elastic support dynamic behavior frequency response function

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Design and analysis of a new high frequency double-servo direct drive rotary valve

Muzhi ZHU,Shengdun ZHAO,Jingxiang LI

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4, Pages 344-350 doi: 10.1007/s11465-016-0406-x

Abstract:

Researchers have investigated direct drive valve for many years to solve problems, such as fluid forceThis paper studied the high frequency double-servo direct drive rotary valve (DDRV), and proposed a novelstructure and drive method satisfying high reversing frequency and adequate quantity of flow.

Keywords： direct drive rotary valve computational fluid dynamics (CFD) flow regulation

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Hierarchical parameter estimation of DFIG and drive train system in a wind turbine generator

Xueping PAN, Ping JU, Feng WU, Yuqing JIN

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3, Pages 367-376 doi: 10.1007/s11465-017-0429-y

Abstract:

A new hierarchical parameter estimation method for doubly fed induction generator (DFIG) and driveFirstly, the parameters of the DFIG and the drive train are estimated locally under different types ofa coordination estimation method is further applied to identify the parameters of the DFIG and the drive

Keywords： wind turbine generator DFIG drive train system hierarchical parameter estimation method trajectory sensitivity

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Meshing stiffness property and meshing status simulation of harmonic drive under transmission loading

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0674-6

Abstract: The multitooth meshing state of harmonic drive (HD) is an important basic characteristic of its high

Keywords： harmonic drive meshing flexibility matrix meshing force loading backlash flexspline contact analysis

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Techno-economic analysis of the adoption of electric vehicles

Donald KENNEDY, Simon P. PHILBIN

Frontiers of Engineering Management 2019, Volume 6, Issue 4, Pages 538-550 doi: 10.1007/s42524-019-0048-x

Abstract: Climate change and concerns over reliable supplies of hydrocarbons are aiding in the focus on electricAlthough sales of electric vehicles are accelerating, it may not be clear that purchasing an electricA techno- economic analysis of electric vehicles comparing them against hybrids, gasoline and dieselcomplexity of electrical power supply, infrastructure requirements and full life cycle concerns show that electric

Keywords： BEV battery powered electric vehicle environmental impact of electric vehicles techno-economic analysis gasoline versus electric powered cars diesel versus electric cars consumer behaviour

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CRITICAL PROCESSES AND MAJOR FACTORS THAT DRIVE NITROGEN TRANSPORT FROM FARMLAND TO SURFACE WATER BODIES

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 4, Pages 541-552 doi: 10.15302/J-FASE-2023518

Abstract:

Agricultural non-point source pollution is increasingly an important issue affecting surface water quality. Currently, the majority of the studies on nitrogen loss have focused on the agricultural field scale, however, the response of surface water quality at the watershed scale into the nitrogen loss at the field scale is poorly understood. The present study systematically reviewed the critical processes and major factors that nitrogen transport from farm fields to surface water bodies. The critical processes of farmland nitrogen entering surface water bodies involve the processes of nitrogen transport from farmland to ditches and the transformation processes of nitrogen during migration in ditches/rivers. Nitrogen transport from farmland to ditches is one of the prerequisites and critical processes for farmland nitrogen transport to surface water bodies. The transformation of nitrogen forms in ditches/rivers is an intermediate process in the migration of nitrogen from farmland to surface water bodies. Nitrogen loss from farmland is related to soil storage and exogenous inputs. Therefore, nitrogen input management should not only consider the current input, but also the contribution of soil storage due to the historical surpluses. Ditches/rivers have a strong retention capacity for nitrogen, which will significantly affect the process of farmland nitrogen entering surface water bodies. The factors affecting nitrogen transformation in river/ditches can be placed in four categories: (1) factors affecting hydraulic retention time, (2) factors affecting contact area, (3) factors affecting biological activity, and (4) forms and amount of nitrogen loading to river/ditches. Ditch systems are more biologically (including plants and microbes) active than rivers with biological factors having a greater influence on nitrogen transformation. When developing pollution prevention and control strategies, ecological ditches can be constructed to increase biological activity and reduce the amount of surplus nitrogen entering the water body. The present research should be valuable for the evaluation of environment impacts of nitrogen loss and the non-point source pollution control.

Keywords： nitrogen loss from soil transformation farm field scale watershed scale

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System construction of a four-side primary permanent-magnet linear motor drive mechanical press

Jintao LIANG, Zhengfeng MING, Peida LI

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4, Pages 600-609 doi: 10.1007/s11465-020-0597-z

Abstract: motor (PPMLM) has a robust secondary structure and high force density and is appropriate for direct-driveThe structure of a four-side PPMLM drive press is presented based on our previous research.The proposed PPMLM drive press exhibits a fast dynamic response and favorable tracking precision and

Keywords： mechanical press direct drive primary permanent-magnet linear motor (PPMLM) servo system active disturbance

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Stem cell niches and endogenous electric fields in tissue repair

Li LI, Jianxin JIANG

Frontiers of Medicine 2011, Volume 5, Issue 1, Pages 40-44 doi: 10.1007/s11684-011-0108-z

Abstract: are involved in the stem cell-based repair process, including stem cell niches and endogenous wound electricHere we briefly review the role of stem cell niches and endogenous electric fields in tissue repair,and hypothesize that endogenous electric fields become part of stem cell niche in the wound site.

Keywords： stem cell stem cell niche electric field tissue repair

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Novel drive mechanism for in-tube micro robots

CHEN Yangzhi, XING Guangquan, PENG Xuefei, LIU Wenguang, YAO Huaping

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1, Pages 94-98 doi: 10.1007/s11465-007-0016-8

Abstract: However, conventional transmission methods are unfit to drive in-tube micro robots.A novel micro drive mechanism called the micro-elastic-meshing-wheel is presented in this paper.The mechanical model of the novel drive mechanism is built, and the maximal transmission force is deducedThen, sufficient experiments are carried out to test maximal transmission force produced by the novel driveThe calculation and experiment results show that the novel drive mechanism can transmit sufficient power

Keywords： limited conventional transmission maximal transmission upright calculation