Results 221 to 230 of about 5,166 (262)

Torque ripple and magnetic forces on teeth in IPM machines

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 2014
Purpose – The purpose of this paper is to investigate torque ripple and magnetic force on the teeth in interior permanent magnet (IPM) machines over a wide range of speed operation for electrical power steering (EPS) applications. Design/methodology/approach – The
K. Wang, Z.Q. Zhu, G. Ombach, W. Chlebosz   +3 more
openaire   +1 more source

FORCE RIPPLE COMPENSATION OF LINEAR SYNCHRONOUS MOTORS

Asian Journal of Control, 2008
Linear synchronous motors are finding expanded use in high-performance applications where high speed and high accuracy is essential. The main problem in improving the tracking performance of linear synchronous motors is the presence of force ripple caused by mismatched current waveforms and unbalanced motor phases or amplifier gains.
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Theoretical Derivation of Phase Current Profile for Switched Reluctance Motors to Suppress Radial Force Ripple and Torque Ripple

2018 IEEE 27th International Symposium on Industrial Electronics (ISIE), 2018
Switched reluctance motors (SRMs) are promising for propulsion motors of electric vehicles (EVs) because of their robust mechanical construction and cost effectiveness. However, practical application of SRMs to vehicular propulsion is hindered by comparatively large torque ripple and radial force ripple, which cause noise vibration and acoustic noise ...
Takayuki Kusumi, Takuto Hara, Kazuhiro Umetani, Eiji Hiraki   +3 more
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Ripple Dynamics and Benthic Transformations Under Variable Wave Forcing

2007
Abstract : Previous work has shown that sound penetration into sandy sediments at low grazing angles is enhanced when ripples are present on the seafloor. In addition, ripples may change effective seafloor roughness and cause strong wave/current attenuation.
Mark W. Schmeeckle, Sergey I. Voropayev, Harindra J. Fernando   +2 more
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Tubular PM machine with large force density and small force ripple for resonance operation

2017 IEEE International Electric Machines and Drives Conference (IEMDC), 2017
One main target in modern design of mobile working machines is the reduction of hydraulic oil in the on board actuator systems. This results in making the systems more environmentally friendly and leads to the idea of replacing the hydraulic actuators by electric actuators.
Mang Cai, Quirin Maurus, Markus Henke
openaire   +1 more source

Investigating the response of wave-generated ripples to changes in wave forcing

Geomorphology, 2020
Abstract Wave-generated ripples are macroscopic roughness elements that influence fluid flow and sediment transport. For a major group of ripples (orbital ripples), morphology (height and wavelength) is set by the wave conditions. In natural conditions, where wave forcing is highly variable, ripple morphology is frequently changing.
Chuang Jin, Giovanni Coco, Rafael O. Tinoco, J. Taylor Perron, Paul M. Myrow, Kimberly L. Huppert, Heide Friedrich, Evan B. Goldstein, Zheng Gong   +8 more
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Characteristic Analysis of Force Ripple Reduction in Linear Magnetic Gear

2018 21st International Conference on Electrical Machines and Systems (ICEMS), 2018
In this study, we present a force analysis based on the gear ratio and shape of a steel pole. The initial model can be found in the reference literature, from which we analyzed the force ripple with the gear ratio. Subsequently, the force ripple according to the shape of the steel pole was analyzed and compared. Finally, we propose an optimal point for
Jong-Hyeon Woo, Sung-Won Seo, Tae-Kyoung Bang, Jang-Young Choi   +3 more
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Analysis and simulation on commutation force ripple of BLDCLM based on velocity

2012 16th International Symposium on Electromagnetic Launch Technology, 2012
During the electromagnetic launchers, the Brushless DC linear motor works on the accelerated state, the range of velocity is wide, so the research on the influence of the speed upon the commutation force ripple is very important. The paper establishes the mathematical model of BLCDLM on the consideration of all factors that affects the commutation ...
Gang Wang, Xiaomin Li, Keyi Zhao, Zhiyuan Li, Huilai Li   +4 more
openaire   +1 more source

FORCE RIPPLE COMPENSATOR FOR A VECTOR CONTROLLED PM LINEAR SYNCHRONOUS MOTOR

2006
A dynamic model including non-idealities for a permanent magnet linear synchronous motor (PMLSM) is postulated and verified. The non-idealities acting on the physical linear motor are measured and analyzed. These experimental results are utilized in the model.
Markus Hirvonen, Heikki Handroos, Olli Pyrhönen   +2 more
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Ripple Minimization for Harmonic-geared Series Elastic Actuator under Force Control

2020 IEEE 16th International Workshop on Advanced Motion Control (AMC), 2020
This paper develops an accurate force control algorithm an reduce the effect of torque ripple for the Series Elastic Actuators (SEA). The harmonic drive is a geared system which is widely utilized in actuators such as SEA. However, it becomes a big challenge to achieve highly accurate force control performance in SEA because of harmonic drive torque ...
Woosong Kang, Chan Lee, Sangjin Bae, Sehoon Oh   +3 more
openaire   +1 more source