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RISS 인기검색어
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- 주제어 : Dynamic magnetic hysteresis (검색결과 3 건)
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Dynamic Hysteresis Model Based on Fuzzy Clustering Approach
Mordjaoui Mourad,Boudjema Bouzid 대한전기학회 2012 Journal of Electrical Engineering & Technology Vol.7 No.6
Hysteretic behavior model of soft magnetic material usually used in electrical machines and electronic devices is necessary for numerical solution of Maxwell equation. In this study, a new dynamic hysteresis model is presented, based on the nonlinear dynamic system identification from measured data capabilities of fuzzy clustering algorithm. The developed model is based on a Gustafson-Kessel (GK) fuzzy approach used on a normalized gathered data from measured dynamic cycles on a C core transformer made of 0.33mm laminations of cold rolled SiFe. The number of fuzzy rules is optimized by some cluster validity measures like ‘partition coefficient’ and ’classification entropy’. The clustering results from the GK approach show that it is not only very accurate but also provides its effectiveness and potential for dynamic magnetic hysteresis modeling.
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Dynamic Hysteresis Model Based on Fuzzy Clustering Approach
Mourad, Mordjaoui,Bouzid, Boudjema The Korean Institute of Electrical Engineers 2012 Journal of Electrical Engineering & Technology Vol.7 No.6
Hysteretic behavior model of soft magnetic material usually used in electrical machines and electronic devices is necessary for numerical solution of Maxwell equation. In this study, a new dynamic hysteresis model is presented, based on the nonlinear dynamic system identification from measured data capabilities of fuzzy clustering algorithm. The developed model is based on a Gustafson-Kessel (GK) fuzzy approach used on a normalized gathered data from measured dynamic cycles on a C core transformer made of 0.33mm laminations of cold rolled SiFe. The number of fuzzy rules is optimized by some cluster validity measures like 'partition coefficient' and 'classification entropy'. The clustering results from the GK approach show that it is not only very accurate but also provides its effectiveness and potential for dynamic magnetic hysteresis modeling.
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Zhang Xin,Cheng Qiming 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.5
When direct torque control (DTC) is applied to matrix converter (MC)-fed permanent synchronous motor (PMSM) system, the conventional DTC scheme is hard to satisfy the proper performance because of the fl ux linkage distortion which occurs around the stator fl ux linkage circle sector boundary. In this paper, a method of dynamic torque hysteresis comparator based on three-level direct matrix converter (TLDMC)-fed PMSM is proposed to improve the performance of PMSM system. First, the traditional MC-DTC strategy and the mathematical model of PMSM are analyzed. Based on the unbalanced stator fl ux linkage in low speed condition, a remedial strategy of dynamic torque hysteresis is proposed. Then, in order to reduce the electromagnetic torque ripple and common-mode voltage, the proposed method is applied in the system of the three-level direct matrix converter, and a new switching table is derived. Finally, the proposed method has been compared with the traditional MC-DTC method. The simulation and experimental results verify that the proposed method greatly improves the performance of fl ux linkage and electromagnetic torque.
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