نتایج جستجو برای: hysteresis loss
تعداد نتایج: 458340 فیلتر نتایج به سال:
1.1 Hysteresis Operators 3 1.2 The Duhem Model 13 1.3 Rheological Models of Elasto-plasticity 17 1.4 Discontinuous Hysteresis 35 1.5 Micromagnetism 45 1.6 Models of Hysteresis with Internal Variables 56 1.7 Genesis of Hysteresis and Coupling with PDEs 62 1.8 A Transport Equation with Hysteresis 69 1.9 A Quasilinear Parabolic PDE with Hysteresis 78 1.10 A Quasilinear Hyperbolic PDE with Hysteres...
the equilibrium moisture content is an important parameter for several post-harvesting operations for pistachio nuts, such as drying processes and storage. in this re-search the adsorption and desorption equilibrium moisture content were determined for two major varieties of iranian pistachios at 11 to 85 percent relative humidities and a con-stant temperature of 50°c. a significant hysteresis ...
Introduction The models of magnetic devices having a magnetic core without known parameters require the core evaluation by means of sophisticated measurement procedures and systems. For certain models, higher measurement accuracy is of key importance. For the other models, additional factors (speed, cost, measurement instruments and apparatus) may strongly limit achievement of the specific meas...
This paper describes the design, evaluation, and implementation of a compensation scheme for a measurement voltage transformer (VT) using the hysteresis characteristics of the core. The error of a VT is caused by the primary winding voltage and secondary winding voltage. The latter depends on the secondary current, whereas the former depends on the primary current, which is an aggregate of the ...
The hysteresis loss theory of rolling resistance is developed for solid rubber wheelchair tires. The analysis is used to correlate test data for a clay-filled natural rubber and a polyurethane tire material. A discussion of tire rolling work, hysteresis loss factor measurement, and rolling loss measurement is presented. An example calculation of rolling resistance for a polyurethane tire is giv...
The work presents a fast and accurate core loss evaluation method for inverter-fed induction machines. proposed takes into account the influence of time variation magnetic permeability on eddy current loss. Furthermore, an approach to precisely evaluate hysteresis results obtained from are compared with existing methods 1.5 kW inverter-driven motor. shows sufficiently high accuracy reduced comp...
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