نتایج جستجو برای: hysteresis loss
تعداد نتایج: 458340 فیلتر نتایج به سال:
There are several models for magnetic hysteresis. Their key purposes to model magnetization curves with a history dependence achieve hysteresis cycles without frequency dependence. different approaches handling The two main categories Duhem-type and Preisach-type models. Duhem handle it via simple directional on the flux rate, proper memory. While Preisach type handles memory of point where dir...
The large strain behavior of filled rubbers is characterized by the strong Mullins effect, permanent set, and induced anisotropy. Strain controlled cyclic tests also exhibit a pronounced hysteresis as a strain rate independent phenomenon. Prediction of these inelastic features in elastomers is an important challenge with immense industrial and technological relevance. In the present paper, a mi...
Perovskite semiconductors differ from most inorganic and organic due to the presence of mobile ions in material. Although phenomenon is intensively investigated, important questions such as exact impact on steady-state power conversion efficiency (PCE) stability remain. Herein, a simple method proposed estimate loss via “fast-hysteresis” measurements by preventing perturbation out their equilib...
This paper addresses the development of inverse compensation techniques for a class of ferromagnetic transducers including magnetostrictive actuators. If unaccommodated, the hys-teresis and nonlinear dynamics can produce severe loss of control authority and potential instabilities when the actuators are incorporated in control design. In this work, hysteresis is modeled through the domain wall ...
We present a parametrised Preisach-type model that describes the hysteresis exhibited by the high temperature superconductors (HTSC); hysteresis is the main cause for losses in the subcritical domain. The parametrised model, in combination with electrical measurements, is independent of geometry, number of laments and other physical measures, and is identiied by a novel method that uses electri...
Hysteresis current control method is vastly used in PWM inverters because of simplicity in performance, fast control response and good ability in limiting peak current. However, switching frequency in hysteresis current control method with fixed bandwidth has large variation during a cycle and therefore causes non-optimal current ripple generation in output current. One of basic problems in imp...
In this paper, we introduce a new class of Lyapunov functionals for analyzing hybrid dynamical systems. This class can be thought of as a generalization of the Lyapunov functional introduced by Yakubovich for systems with hysteresis nonlinearities which incorporates path integrals that account for the energy loss or gain every time a hysteresis loop is traversed. Hence, these Lyapunov functiona...
The influence of annealing time on temperature range of martensitic phase transition (ΔT(A-M)), thermal hysteresis (ΔThys), magnetic hysteresis loss (ΔMhys), magnetic entropy change (ΔS(M)) and relative refrigeration capacity (RC) of the Mn-rich Ni43Mn46Sn11 melt spun ribbons have been systematically studied. By optimal annealing, an extremely large ΔS(M) of 43.2 J.kg(-1)K(-1) and a maximum RC ...
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