Results 211 to 220 of about 39,008 (262)
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Accurate Torque Ripple Measurement for PMSM
IEEE Transactions on Instrumentation and Measurement, 2011Torque ripple in permanent-magnet synchronous motors is generally undesirable. Significant work has been done to minimize this torque, either by modifying the mechanical motor design or by careful controller design. Surprisingly, however, little work has been published on the accuracy of torque ripple measurement.
Greg Heins, Mark Thiele
exaly +3 more sources
Contactless measurement of torque
Mechatronics, 2000Abstract This paper describes a micromechanical sensor for contactless detection of torque at rotating shafts. The sensor consists of a silicon chip and uses a magnetoelastic principle for measurement. A closed magnetic loop is formed by the sensor chip and a magnetoelastic layer which is applied to the shaft.
Frank Umbach +3 more
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Measurement of the Casimir torque
Nature, 2018Intermolecular forces are pervasive in nature and give rise to various phenomena including surface wetting1, adhesive forces in biology2,3, and the Casimir effect4, which causes two charge-neutral, metal objects in vacuum to attract each other.
David A T, Somers +3 more
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On the measurement of the Casimir torque
physica status solidi (b), 2011AbstractWe discuss the possibility of measuring the recently proposed Casimir torque between bi‐refringent crystals, using a torsion pendulum in dark vacuum. By simulation, we analyze the effects of precession, surface polish, and torque due to stray charge. We determine the experimental conditions under which the torque might be measured, and conclude
Xiang Chen, John C. H. Spence
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Physica B: Condensed Matter, 1995
Abstract The Fermi surface of 2 H -NbSe 2 has been investigated using the torque method in strong magnetic fields up to 27 T and at temperatures down to 0.4 K. We show that using the torque method it was possible to observe oscillations at orientations below ⊗ ⩽ 15° ⊗ is the angle between the c -axis and the magnetic field).
S. Rettenberger +8 more
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Abstract The Fermi surface of 2 H -NbSe 2 has been investigated using the torque method in strong magnetic fields up to 27 T and at temperatures down to 0.4 K. We show that using the torque method it was possible to observe oscillations at orientations below ⊗ ⩽ 15° ⊗ is the angle between the c -axis and the magnetic field).
S. Rettenberger +8 more
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A precision torque balance for the measurement of small torques
Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics, 1955THE development and testing of torque motors for precision gyroscopes require the accurate measurement of the small torques developed. These are stall torques, and are measured at various angular positions of the rotor with respect to the stator. The magnitude of these torques is generally less than 50,000 dyne-centimeters (dyne-cm).
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