Results 221 to 230 of about 5,212 (262)
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Torque ripple and magnetic forces on teeth in IPM machines
COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 2014Purpose – 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 +3 more
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FORCE RIPPLE COMPENSATION OF LINEAR SYNCHRONOUS MOTORS
Asian Journal of Control, 2008Linear 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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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 +3 more
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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 +3 more
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Ripple Dynamics and Benthic Transformations Under Variable Wave Forcing
2007Abstract : 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 +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), 2017One 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
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FORCE RIPPLE COMPENSATOR FOR A VECTOR CONTROLLED PM LINEAR SYNCHRONOUS MOTOR
2006A 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 +2 more
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Investigating the response of wave-generated ripples to changes in wave forcing
Geomorphology, 2020Abstract 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 +8 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, 2012During 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 +4 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), 2018In 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 +3 more
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Adaptive Robust Control of Linear Motor with Ripple Force Compensation
2011 Third Pacific-Asia Conference on Circuits, Communications and System (PACCS), 2011The adaptive robust control (ARC) provides a good output tracking performance. However, the common mathematical model of a linear motor usually neglects some interference terms such as the ripple force. And the common simplified mathematical model of a linear motor may weaken the tracking accuracy performance.
Wei-jia Shi, De-cheng Zhang
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