Results 251 to 260 of about 106,319 (304)
Some of the next articles are maybe not open access.
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
openaire +1 more source
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
openaire +1 more source
Parasitic forces in large synchronous machines considering tooth ripple effects
The XIX International Conference on Electrical Machines - ICEM 2010, 2010In large salient-pole synchronous machines the magnetic field crossing the air-gap causes radial forces on the stator core physically described by the Maxwell-stress. These force waves do not contribute to the torque but may lead to dangerous vibrations.
Georg Traxler-Samek +2 more
openaire +1 more source
Analysis of the force ripples of a current loaded PMLSM
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2009PurposeThe purpose of this paper is to present an analysis of the force ripples of an open slot permanent magnet linear synchronous motor (PMLSM). A calculation procedure using 2D finite elements method (2D‐FEM) is then evaluated with experimentations.Design/methodology/approachFirst, the studied PMLSM and its main features are introduced. Then, the 2D‐
Remy, Ghislain +3 more
openaire +2 more sources
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
openaire +1 more source
Force and magnetic field calculations for rippled energy storage solenoids
IEEE Transactions on Magnetics, 1981The magnetic field and force on the surface of a rippled thin wall solenoid are calculated and compared to the case of an unrippled solenoid. Analytical and numerical calculation methods are included.
Y. Eyssa, M. Hilal
openaire +1 more source
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
openaire +1 more source
Back EMF improvement and force ripple reduction in PM linear motor drives
2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551), 2004Permanent magnet linear synchronous motor (PMLSM) drives may exhibit cogging force and high harmonic content in the EMF waveform. Both of them cause a force ripple, under low and high load, introducing trouble in the positioning precision. To reduce the force ripple, there are two techniques: an appropriate PMLSM design, and a suitable control of the ...
BIANCHI, NICOLA +2 more
openaire +1 more source
Identification and Compensation of Force Ripple in PMSLM using a JITL Technique
Asian Journal of Control, 2014AbstractThis paper presents an adaptive compensation scheme for reducing the force ripple effects in permanent magnet synchronous linear motor (PMSLM). Firstly, when the velocity of a linear motor is close to zero, based on a fast Fourier transform (FFT) analysis, the dominant displacement periodicity of the force ripple can be obtained for simplifying
Lu, Shaowu +4 more
openaire +2 more sources
Feedforward suppression of force ripple based on a simplex-optimized dither signal
ISA Transactions, 2003This paper presents the design and realization of a feedforward dither signal to reduce the force ripple in an iron-core permanent magnet linear motor (PMLM). A composite control structure is used, consisting of three components: a simple feedforward component, a PID feedback component, and a ripple compensator (RC).
Tan, K.K., Chin, S.J., Dou, H.F.
openaire +2 more sources