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Optimal current waveforms for brushless permanent magnet motors
Permanent magnetic electric magnetic current waveform emf waveform voltage current limiting eddy current loss model
2015/8/7
In this paper we give energy-optimal excitation current waveforms for a permanent magnet synchronous motor that result in a desired average torque. Our formulation generalizes previous work by includi...
Optimal Current Waveforms for Brushless Permanent Magnet Motors
Optimal Current Waveforms Brushless Permanent Magnet Motors
2015/7/9
In this paper we give energy-optimal excitation current waveforms for a permanent magnet synchronous motor that result in a desired average torque. Our formulation generalizes previous work by includi...
Factors that Facilitate and Inhibit Engagement of Registered Nurses: An Analysis and Evaluation of Magnet versus Non-Magnet Designated Hospital
Vigor Dedication Absorption Magnet
2015/1/19
Work engagement of registered nurses (RNs) has gained attention in health care, as an organizational process that is requisite to promoting optimal patient outcomes. Improving patient outcomes has cau...
From Fur Baby to Chick Magnet: A Sociological View of Dogs and Their People
Sociological View Chick Magnet
2015/1/7
Since their domestication, dogs have played an important role in human society. People put them to work hunting game, herding livestock and guarding the home, and also keep them as companions. As ...
Spin current and polarization reversal through a single-molecule magnet with ferromagnetic electrodes
Spin current polarization reversal single-molecule magnet ferromagnetic electrodes
2012/2/27
We theoretically study the spin-polarized transport through a single-molecule magnet, which is weakly coupled to ferromagnetic leads, by means of the rate-equation approach. We consider both the ferro...
Radiation effects in a muon collider ring and dipole magnet protection
Radiation effects muon collider ring dipole magnet protection
2012/2/28
The requirements and operating conditions for a Muon Collider Storage Ring (MCSR) pose significant challenges to superconducting magnets. The dipole magnets should provide a high magnetic field to red...
Critical behavior of the Random-Field Ising Magnet with long range correlated disorder
random- eld Ising model, correlated disorder, corrections to scaling
2011/9/29
We study the correlated-disorder driven zero-temperature phase transition of the Random-Field Ising Magnet using exact numerical ground-state calculations for cubic lattices. We consider correlations ...
Did a 1-dimensional magnet detect a 248-dimensional Lie algebra?
1-dimensional magnet detect 248-dimensional Lie algebra
2011/2/28
About a year ago, a team of physicists reported in Science that they had observed \evidence for E8 symmetry" in the laboratory. This expository article is aimed at mathematicians and explains the chai...
Detection of static eccentricity for permanent magnet synchronous motors using the coherence analysis
Permanent magnet synchronous motor eccentricity fault diagnosis spectral analysis
2010/11/22
This paper reports on work to detect the static eccentricity faults for permanent magnet synchronous motor (PMSM) using spectral analysis methods. Measurements are carried out by collecting the stator...
Properties of recent IBAD-MOCVD Coated Conductors relevant to their high field, low temperature magnet use
Properties high field, low temperature magnet use
2010/11/18
BaZrO3 (BZO) nanorods are now incorporated into production IBAD-MOCVD coated conductors. Here we compare several examples of both BZO-free and BZO-containing coated conductors using critical current (...
Lost and found: The missing diabolical points in the Fe$_8$ molecular magnet
diabolical points Fe$_8$ molecular magnet
2010/11/24
Certain diabolical points in the tunneling spectrum of the single-molecule magnet Fe8 were pre-
viously believed to be have been eliminated as a result of a weak fourth-order anisotropy. As shown by ...
Experimental investigation of shaft transducerless speed and position control of ac induction and interior permanent magnet motors
IPM Motor induction motor sensorless vector control speed and position control high frequency signal injection
2010/10/12
In order to drive AC motors with high efficiency and high motion performance, and to provide accurate speed/position control, motor shaft speed and/or position feedback is required. For this purpose, ...
Quasideterminant solutions of the generalized Heisenberg magnet model
Heisenberg magnet Lie group SU(2)
2010/4/7
In this paper we present Darboux transformation for the generalized Heisenberg magnet (GHM) model based on general linear Lie group GL(n) and construct multi-soliton solutions in terms of quasidetermi...
Bäcklund Transformations for the Trigonometric Gaudin Magnet
Bä cklund Transformations Trigonometric Gaudin Magnet
2010/4/6
We construct a Backlund transformation for the trigonometric classical Gaudin magnet starting from the Lax representation of the model. The Darboux dressing matrix obtained depends just on one set of ...
Propositions for investigating adoption and diffusion of the magnet hospital concept through the lenses of organization theory
Innovation Magnet Hospital Nursing Shortage Organization Theory Propositions Recruitment Registered Nurse Retention
2009/12/1
The U.S. health system continues to experience a persistent shortage of Registered
Nurses. A promising innovation to address this problem is the “magnet hospital concept” which comprises a set of or...