Results 331 to 340 of about 827,489 (372)

Optomechanical torque magnetometry

Conference on Lasers and Electro-Optics, 2016
A thin film of magnetic permalloy is integrated into a photonic crystal split-beam cavity allowing for optomechanical detection of magnetic torques under applied fields. The magnetic response of the magnetometer is observed under ambient conditions.
Paul E. Barclay, Tayyaba Firdous, Marcelo Wu, Joseph E. Losby, Fatemeh Fani Sani, Nathanael L.-Y. Wu, Mark R. Freeman   +6 more
openaire   +3 more sources

Torque standard machine for calibration of reference torque wrench and torque transducer at Nim

Tenth International Symposium on Precision Engineering Measurements and Instrumentation, 2019
The paper describes a new torque standard machine at NIM. The new reference torque standard machine is designed to calibrate the reference torque wrench and torque transducer. The relative expanded uncertainty of this torque standard from 10Nm to 5000Nm is better than 5×10-4（k=2）.
Dian long Zhang, Zhi Min Zhang, Feng Meng   +2 more
openaire   +2 more sources

Automatic Torque Controller for Torque Motors

Journal of the Society of Motion Picture and Television Engineers, 1952
The use of the automatic torque controller permits the full advantages of torque motors to be realized for film take-up and holdback duty without being handicapped by their inherent limitations when operated in the conventional manner.
openaire   +2 more sources

A Practical and Adaptive Method to Achieve EMG-Based Torque Estimation for a Robotic Exoskeleton

IEEE/ASME transactions on mechatronics, 2019
To improve the efficacy of robotic exoskeleton-based rehabilitation training, active joint torque of subjects should be detected. This paper presents a practical and adaptive method to estimate active joint torque using electromyography (EMG) signals for
Kai Gui, Honghai Liu, Dingguo Zhang
semanticscholar   +1 more source

Two-terminal spin–orbit torque magnetoresistive random access memory

Nature Electronics, 2018
Spin-transfer torque magnetoresistive random access memory (STT-MRAM) is an attractive alternative to existing random access memory technologies due to its non-volatility, fast operation and high endurance.
N. Sato, F. Xue, R. White, C. Bi, Shan X. Wang   +4 more
semanticscholar   +1 more source

Direct Torque Control for Switched Reluctance Motor to Obtain High Torque–Ampere Ratio

IEEE transactions on industrial electronics (1982. Print), 2019
The direct torque control (DTC) method was introduced into the switched reluctance motor to reduce its inherent output torque ripple. However, the conventional DTC method produces negative torque more or less, which reduces the torque–ampere ratio of ...
Ning Yan, Xin Cao, Z. Deng
semanticscholar   +1 more source

Moment of Inertia and Friction Torque Coefficient Identification in a Servo Drive System

IEEE transactions on industrial electronics (1982. Print), 2019
This paper proposes a new method to identify the mechanical parameters of a servo drive system, such as the moment of inertia and friction torque coefficients.
Sungmin Kim
semanticscholar   +1 more source

A precision torque balance for the measurement of small torques

Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics, 1955
THE 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).
openaire   +2 more sources

Dual Three-Phase PMSM Torque Modeling and Maximum Torque per Peak Current Control Through Optimized Harmonic Current Injection

IEEE transactions on industrial electronics (1982. Print), 2019
Vector space decomposition (VSD) model is widely used for dual three-phase permanent magnet synchronous machine (dual-PMSM) control, in which two direct-quadrature (DQ) frames, DQ1 and DQ2, are introduced to facilitate the controller design.
G. Feng, Chunyan Lai, Michael Kelly, N. Kar   +3 more
semanticscholar   +1 more source

Induced torque in an ellipsoid. Torque anisotropy in potassium

Physical Review B, 1976
We present the theory of the induced torque in a conducting ellipsoid rotating in a magnetic field. The results for compensated metals and for metals with open orbits are not strikingly different from those found in a case of a sphere. However, in a noncompensated metal with closed orbits only, large nonsaturating anisotropies appear.
openaire   +2 more sources