• 제목/요약/키워드: Jiles-Atherton

검색결과 5건 처리시간 0.022초

강자성체의 히스테리시스 역 보상 모델 (Inverse Compensation of Hysteresis in Ferromagnetic Materials)

  • 박영우;한광섭
    • 한국정밀공학회:학술대회논문집
    • /
    • 한국정밀공학회 2004년도 추계학술대회 논문집
    • /
    • pp.1470-1474
    • /
    • 2004
  • This paper addresses the development of inverse compensation techniques for a class of ferromagnetic transducers including magnetostrictive actuators. In this work, hysteresis is modeled through the domain wall theory originally proposed by Jiles and Atherton[1]. This model is based on the quantification of the energy required to translate domain walls pinned at inclusions in the material with the magnetization at a given field level specified through the solution of an ordinary differential equation. A complementary differential equation is then employed to compute the inverse which can be used to compensate for hysteresis and nonlinear dynamics in control design.

  • PDF

Identification of the Jiles-Atherton Model Parameters Using Simulated Annealing Method

  • Bai, Baodong;Wang, Jiayin
    • Journal of international Conference on Electrical Machines and Systems
    • /
    • 제1권2호
    • /
    • pp.18-22
    • /
    • 2012
  • This paper presents a method and the experimental measurement system for the determination of Jiles-Atherton model parameters of the 30ZH120 electrical steel sheet. The paper utilizes Epstein Square devices to proceed with the experiment and measurement on a group of hysteresis loops of some certain transformers which use the 30ZH120 electrical steel sheet under two different lap ways. The approach relies on the simulated annealing optimization method in order to minimize the error between the measured and modeled hysteresis curves and yield the best five Jiles-Atherton model parameters. A convenient program, based on the Simulink platform, that can identify the J-A model parameters automatically from the experimental saturated hysteresis loop which is used to model the nonlinear characteristics of the electrical steel sheet, is developed. Research shows that the simulated annealing optimization method gets satisfactory results.

Finite Element Study of Ferroresonance in single-phase Transformers Considering Magnetic Hysteresis

  • Beyranvand, Morteza Mikhak;Rezaeealam, Behrooz
    • Journal of Magnetics
    • /
    • 제22권2호
    • /
    • pp.196-202
    • /
    • 2017
  • The occurrence of ferroresonance in electrical systems including nonlinear inductors such as transformers will bring a lot of malicious damages. The intense ferromagnetic saturation of the iron core is the most influential factor in ferroresonance that makes nonsinusoidal current and voltage. So the nonlinear behavior modeling of the magnetic core is the most important challenge in the study of ferroresonance. In this paper, the ferroresonance phenomenon is investigated in a single phase transformer using the finite element method and considering the hysteresis loop. Jiles-Atherton (JA) inverse vector model is used for modeling the hysteresis loop, which provides the accurate nonlinear model of the transformer core. The steady-state analysis of ferroresonance is done while considering different capacitors in series with the no-load transformer. The accurate results from copper losses and iron losses are extracted as the most important specifications of transformers. The validity of the simulation results is confirmed by the corresponding experimental measurements.

전기강판의 벡터 자기특성 모델링을 위한 개선된 E&S Vector Hysteresis Model (Improved E&S Vector Hysteresis Model for the Precise Modeling of Vector Magnetic Properties of Electrical Steel Sheet)

  • 송민호;윤희성;고창섭
    • 전기학회논문지
    • /
    • 제60권9호
    • /
    • pp.1684-1692
    • /
    • 2011
  • Recently, several vector hysteresis models such as vector Preisach, vector Jiles-Atherton and dynamic E&S model have been proposed to describe vector magnetic properties of electrical steel sheets. However, it is still difficult to find an adequate vector hysteresis model in finite element application for both the Non-oriented and Grain-oriented electrical steel sheets under alternating and rotating field conditions. In this paper, an improved E&S vector hysteresis model is suggested to describe the vector magnetic properties of both Non-oriented and Grain-oriented electrical steel sheets under various magnetic field conditions including alternating and rotating magnetic field conditions. The validity of the proposed model is tested through comparisons with the experimental results under various magnetic field conditions.

전자기력에 의해 유도된 변압기의 진동 해석을 위한 자왜 현상 모델링 (Magnetostriction Modeling for the Analysis of Electromagnetically Induced Vibration of Transformers)

  • 유승열;이준신;이욱륜;노명규
    • 한국정밀공학회지
    • /
    • 제25권1호
    • /
    • pp.108-114
    • /
    • 2008
  • Recently, there have been several instances that the nuclear power plants were shut down due to the mechanical faults in the main transformer of the plants. These mechanical faults are primarily originated from the electromagnetically induced mechanical vibrations. Magnetostriction is identified to be the main cause of the mechanical vibration after analyzing the vibration data of the main transformers in nuclear power plants. In this study, we derived a mathematical model of the magnetostriction based on the Jiles-Atherton hysteresis model. The validity of the model is checked by matching the simulations with the experimental observations. The magnetostriction model used in this study will be the first step toward developing a design tool far the transformers that have minimal mechanical vibrations and are robust to mechanical faults.