The Experts below are selected from a list of 36687 Experts worldwide ranked by ideXlab platform
Jianguo Zhu - One of the best experts on this subject based on the ideXlab platform.
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robust tolerance design optimization of a pm claw pole motor with soft Magnetic Composite cores
IEEE Transactions on Magnetics, 2018Co-Authors: Gang Lei, Jianguo Zhu, Chengcheng Liu, Youguang GuoAbstract:In the past decades, various methods have been investigated for assessing performance variation and robust optimization for electroMagnetic device design under uncertainties and/or tolerances. However, in actual production, the manufacturing tolerances are variable to a certain extent, which can be optimized for integrating the performance, manufacturing cost, and production quality. This paper proposes a tolerance design optimization approach by optimizing the design parameters and tolerances simultaneously based on design for six sigma technique. A permanent magnet claw pole motor with soft Magnetic Composite cores is optimized by using the proposed approach. For this high-dimensional optimization problem involving electroMagnetic and thermal performance, Kriging model and 3-D thermal network model are employed under the multilevel framework for increasing the optimization efficiency. Finally, through the analysis, the proposed robust tolerance optimization method shows good performance with improved motor performance as well as the diversity controlling without cost increasing.
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Design Issues for Claw Pole Machines with Soft Magnetic Composite Cores
MDPI AG, 2018Co-Authors: Chengcheng Liu, Jianguo Zhu, Youhua Wang, Gang Lei, Youguang GuoAbstract:By using global ring winding, the torque coefficient of the transverse flux machine (TFM) is proportional to its number of pole pairs, and thus the TFM possesses high torque density ability when compared with other electrical machines. As a special kind of TFM, the claw pole machine (CPM) can have more torque due to its special claw pole teeth. The manufacturing of CPM or TFM with silicon steels was very difficult in the past, and is a handicap for the progress of this kind of machine. Thanks to the advent of soft Magnetic Composite (SMC) materials, the manufacturing process of CPM has become more and more simple. More attention has been paid to this kind of technology, and some mass production CPMs with SMC cores have appeared. However, there are few works that discuss the key design issues for this kind of machine. In this paper, a small CPM with SMC is used as as a research benchmark. Various design methods that can be adopted to improve its performance have been studied, including unequal stator claw pole teeth, a skewing magnet design, consequent pole design, and etc. The 3D finite element method (FEM) is used for the machine analysis, and it is verified by the experimental results of a CPM with SMC cores
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comparative study of small electrical machines with soft Magnetic Composite cores
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Chengcheng Liu, Youhua Wang, Youguang Guo, Gang Lei, Tianshi Wang, Jianguo ZhuAbstract:In this paper, various kinds of electrical machines with soft Magnetic Composite (SMC) cores are compared, based on the qualitative and quantitative comparison methods. In the first part, the performances of five typical electrical machines with SMC cores are qualitatively compared. Simplified power equations for transverse flux, axial flux, and radial flux electrical machines are deduced to show the main difference among them and key design points of each machine. In the second part, the outer rotor claw pole machine (CPM) and outer rotor transverse flux machine (TFM) are comprehensively compared in a quantitative way, based on the three-dimensional finite-element method. It shows that the power capability of the outer rotor CPM is much higher than that of the TFM. On the other hand, the outer rotor CPM has higher cogging torque and no-load losses than the TFM. Furthermore, the four outer rotor radial flux machines are optimized and compared with the outer rotor CPM. The calculated results of the outer rotor TFM are compared with the experiment results, showing that the analysis results match well with the experiment ones. Several useful and interesting conclusions have been obtained for the electrical machines with SMC cores.
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a stress dependent Magnetic hysteresis model for soft Magnetic Composite materials
IEEE Transactions on Applied Superconductivity, 2016Co-Authors: Nana Duan, Youguang Guo, Shuhong Wang, Jianguo ZhuAbstract:In the fabrication of soft Magnetic Composite materials, the iron powder particles are submitted to a high-pressure compaction process that should be considered in the modeling of Magnetic hysteresis. This paper introduces a novel approach for modeling the stress-dependent Magnetic hysteresis, based on the Stoner–Wohlfarth (S–W) model. Moreover, for determining the S–W particle equilibrium orientation directly, an extended S–W astroid method, which considering the stress effect, is presented. To verify this presented model, the Magnetic hysteresis phenomenon of SOMALOY 500 are measured and simulated. The comparison between the two results shows that this model is feasible and effective, which can be applied to practical engineering.
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robust multidisciplinary design optimization of pm machines with soft Magnetic Composite cores for batch production
IEEE Transactions on Magnetics, 2016Co-Authors: Gang Lei, Youguang Guo, Chengcheng Liu, Jianguo ZhuAbstract:This paper presents a robust approach for multidisciplinary design optimization of permanent magnet (PM) motors with soft Magnetic Composite (SMC) cores to improve their manufacturing quality in batch production. First, a general multidisciplinary design analysis framework is developed for PM-SMC motors, which includes electroMagnetic, thermal, modal, and manufacturing analyses. Second, an improved multilevel optimization method is presented to improve the efficiency of the robust optimization. Finally, to demonstrate the effectiveness, a PM-SMC transverse flux machine is investigated. The numerical solutions, including electroMagnetic and thermal analyses, are validated by the experimental results. As shown, the proposed method can significantly increase motor’s reliability and greatly reduce the computation cost, which benefits the mass production in industrial applications.
Youguang Guo - One of the best experts on this subject based on the ideXlab platform.
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robust tolerance design optimization of a pm claw pole motor with soft Magnetic Composite cores
IEEE Transactions on Magnetics, 2018Co-Authors: Gang Lei, Jianguo Zhu, Chengcheng Liu, Youguang GuoAbstract:In the past decades, various methods have been investigated for assessing performance variation and robust optimization for electroMagnetic device design under uncertainties and/or tolerances. However, in actual production, the manufacturing tolerances are variable to a certain extent, which can be optimized for integrating the performance, manufacturing cost, and production quality. This paper proposes a tolerance design optimization approach by optimizing the design parameters and tolerances simultaneously based on design for six sigma technique. A permanent magnet claw pole motor with soft Magnetic Composite cores is optimized by using the proposed approach. For this high-dimensional optimization problem involving electroMagnetic and thermal performance, Kriging model and 3-D thermal network model are employed under the multilevel framework for increasing the optimization efficiency. Finally, through the analysis, the proposed robust tolerance optimization method shows good performance with improved motor performance as well as the diversity controlling without cost increasing.
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Design Issues for Claw Pole Machines with Soft Magnetic Composite Cores
MDPI AG, 2018Co-Authors: Chengcheng Liu, Jianguo Zhu, Youhua Wang, Gang Lei, Youguang GuoAbstract:By using global ring winding, the torque coefficient of the transverse flux machine (TFM) is proportional to its number of pole pairs, and thus the TFM possesses high torque density ability when compared with other electrical machines. As a special kind of TFM, the claw pole machine (CPM) can have more torque due to its special claw pole teeth. The manufacturing of CPM or TFM with silicon steels was very difficult in the past, and is a handicap for the progress of this kind of machine. Thanks to the advent of soft Magnetic Composite (SMC) materials, the manufacturing process of CPM has become more and more simple. More attention has been paid to this kind of technology, and some mass production CPMs with SMC cores have appeared. However, there are few works that discuss the key design issues for this kind of machine. In this paper, a small CPM with SMC is used as as a research benchmark. Various design methods that can be adopted to improve its performance have been studied, including unequal stator claw pole teeth, a skewing magnet design, consequent pole design, and etc. The 3D finite element method (FEM) is used for the machine analysis, and it is verified by the experimental results of a CPM with SMC cores
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comparative study of small electrical machines with soft Magnetic Composite cores
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Chengcheng Liu, Youhua Wang, Youguang Guo, Gang Lei, Tianshi Wang, Jianguo ZhuAbstract:In this paper, various kinds of electrical machines with soft Magnetic Composite (SMC) cores are compared, based on the qualitative and quantitative comparison methods. In the first part, the performances of five typical electrical machines with SMC cores are qualitatively compared. Simplified power equations for transverse flux, axial flux, and radial flux electrical machines are deduced to show the main difference among them and key design points of each machine. In the second part, the outer rotor claw pole machine (CPM) and outer rotor transverse flux machine (TFM) are comprehensively compared in a quantitative way, based on the three-dimensional finite-element method. It shows that the power capability of the outer rotor CPM is much higher than that of the TFM. On the other hand, the outer rotor CPM has higher cogging torque and no-load losses than the TFM. Furthermore, the four outer rotor radial flux machines are optimized and compared with the outer rotor CPM. The calculated results of the outer rotor TFM are compared with the experiment results, showing that the analysis results match well with the experiment ones. Several useful and interesting conclusions have been obtained for the electrical machines with SMC cores.
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a stress dependent Magnetic hysteresis model for soft Magnetic Composite materials
IEEE Transactions on Applied Superconductivity, 2016Co-Authors: Nana Duan, Youguang Guo, Shuhong Wang, Jianguo ZhuAbstract:In the fabrication of soft Magnetic Composite materials, the iron powder particles are submitted to a high-pressure compaction process that should be considered in the modeling of Magnetic hysteresis. This paper introduces a novel approach for modeling the stress-dependent Magnetic hysteresis, based on the Stoner–Wohlfarth (S–W) model. Moreover, for determining the S–W particle equilibrium orientation directly, an extended S–W astroid method, which considering the stress effect, is presented. To verify this presented model, the Magnetic hysteresis phenomenon of SOMALOY 500 are measured and simulated. The comparison between the two results shows that this model is feasible and effective, which can be applied to practical engineering.
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robust multidisciplinary design optimization of pm machines with soft Magnetic Composite cores for batch production
IEEE Transactions on Magnetics, 2016Co-Authors: Gang Lei, Youguang Guo, Chengcheng Liu, Jianguo ZhuAbstract:This paper presents a robust approach for multidisciplinary design optimization of permanent magnet (PM) motors with soft Magnetic Composite (SMC) cores to improve their manufacturing quality in batch production. First, a general multidisciplinary design analysis framework is developed for PM-SMC motors, which includes electroMagnetic, thermal, modal, and manufacturing analyses. Second, an improved multilevel optimization method is presented to improve the efficiency of the robust optimization. Finally, to demonstrate the effectiveness, a PM-SMC transverse flux machine is investigated. The numerical solutions, including electroMagnetic and thermal analyses, are validated by the experimental results. As shown, the proposed method can significantly increase motor’s reliability and greatly reduce the computation cost, which benefits the mass production in industrial applications.
Kun Zhang - One of the best experts on this subject based on the ideXlab platform.
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radiofrequency sensitive longitudinal relaxation tuning strategy enabling the visualization of radiofrequency ablation intensified by Magnetic Composite
ACS Applied Materials & Interfaces, 2019Co-Authors: Yan Fang, Haohao Yin, Weiwei Ren, Shisi Ding, Weizhong Tang, Lihua Xiang, Xin Guan, Kun ZhangAbstract:As a minimally invasive heat source, radiofrequency (RF) ablation still encounters potential damages to the surrounding normal tissues because of heat diffusion, high power, and long time. With a comprehensive understanding of the current state of the art on RF ablation, a Magnetic Composite using porous hollow iron oxide nanoparticles (HIONs) as carriers to load dl-menthol (DLM) has been engineered. This Composite involves two protocols for enhancing RF ablation, that is, HION-mediated magnetothermal conversion in RF field and RF solidoid vaporation (RSV)-augmented inertial cavitation, respectively. A combined effect based on two protocols is found to improve energy transformation, and further, along with hydrophobic DLM-impeded heat diffusion, improve the energy utilization efficiency and significantly facilitate ex vivo and in vivo RF ablation. More significantly, in vitro and in vivo RSV processes and RSV-augmented inertial cavitation for RF ablation can be monitored by T1-weighted Magnetic resonance ...
Wei Wu - One of the best experts on this subject based on the ideXlab platform.
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development of a pm transverse flux motor with soft Magnetic Composite core
IEEE Transactions on Energy Conversion, 2006Co-Authors: P A Watterson, Wei WuAbstract:This paper reports the design, performance analysis, fabrication, and experimental results of a three-phase, three-stack permanent magnet transverse flux motor with a soft Magnetic Composite stator core, which was designed to take advantage of the unique properties of the new material. Parameter computations by finite element analysis of the Magnetic field and performance prediction by the equivalent electric circuit are discussed. To validate the simulation, a prototype motor has been fabricated and operated with a sensorless, brushless direct coupler drive scheme. The experimental results are thoroughly presented and agree with the theoretical calculations very well.
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comparative study of 3 d flux electrical machines with soft Magnetic Composite cores
IEEE Industry Applications Society Annual Meeting, 2002Co-Authors: P A Watterson, Wei WuAbstract:This paper compares two types of three-dimensional (3D) flux electrical machines with soft Magnetic Composite (SMC) cores, namely claw pole and transverse flux machines. 3D electroMagnetic field analysis is conducted for the computation of some important parameters and optimization of the machine structures. An equivalent electric circuit is derived to calculate the machine performances. The analysis methods are validated by experimental results of a single phase claw pole permanent magnet machine with a SMC core. Useful conclusions are drawn from the evaluation and comparison of two machines with soft Magnetic Composite cores.
Chengcheng Liu - One of the best experts on this subject based on the ideXlab platform.
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robust tolerance design optimization of a pm claw pole motor with soft Magnetic Composite cores
IEEE Transactions on Magnetics, 2018Co-Authors: Gang Lei, Jianguo Zhu, Chengcheng Liu, Youguang GuoAbstract:In the past decades, various methods have been investigated for assessing performance variation and robust optimization for electroMagnetic device design under uncertainties and/or tolerances. However, in actual production, the manufacturing tolerances are variable to a certain extent, which can be optimized for integrating the performance, manufacturing cost, and production quality. This paper proposes a tolerance design optimization approach by optimizing the design parameters and tolerances simultaneously based on design for six sigma technique. A permanent magnet claw pole motor with soft Magnetic Composite cores is optimized by using the proposed approach. For this high-dimensional optimization problem involving electroMagnetic and thermal performance, Kriging model and 3-D thermal network model are employed under the multilevel framework for increasing the optimization efficiency. Finally, through the analysis, the proposed robust tolerance optimization method shows good performance with improved motor performance as well as the diversity controlling without cost increasing.
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Design Issues for Claw Pole Machines with Soft Magnetic Composite Cores
MDPI AG, 2018Co-Authors: Chengcheng Liu, Jianguo Zhu, Youhua Wang, Gang Lei, Youguang GuoAbstract:By using global ring winding, the torque coefficient of the transverse flux machine (TFM) is proportional to its number of pole pairs, and thus the TFM possesses high torque density ability when compared with other electrical machines. As a special kind of TFM, the claw pole machine (CPM) can have more torque due to its special claw pole teeth. The manufacturing of CPM or TFM with silicon steels was very difficult in the past, and is a handicap for the progress of this kind of machine. Thanks to the advent of soft Magnetic Composite (SMC) materials, the manufacturing process of CPM has become more and more simple. More attention has been paid to this kind of technology, and some mass production CPMs with SMC cores have appeared. However, there are few works that discuss the key design issues for this kind of machine. In this paper, a small CPM with SMC is used as as a research benchmark. Various design methods that can be adopted to improve its performance have been studied, including unequal stator claw pole teeth, a skewing magnet design, consequent pole design, and etc. The 3D finite element method (FEM) is used for the machine analysis, and it is verified by the experimental results of a CPM with SMC cores
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comparative study of small electrical machines with soft Magnetic Composite cores
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Chengcheng Liu, Youhua Wang, Youguang Guo, Gang Lei, Tianshi Wang, Jianguo ZhuAbstract:In this paper, various kinds of electrical machines with soft Magnetic Composite (SMC) cores are compared, based on the qualitative and quantitative comparison methods. In the first part, the performances of five typical electrical machines with SMC cores are qualitatively compared. Simplified power equations for transverse flux, axial flux, and radial flux electrical machines are deduced to show the main difference among them and key design points of each machine. In the second part, the outer rotor claw pole machine (CPM) and outer rotor transverse flux machine (TFM) are comprehensively compared in a quantitative way, based on the three-dimensional finite-element method. It shows that the power capability of the outer rotor CPM is much higher than that of the TFM. On the other hand, the outer rotor CPM has higher cogging torque and no-load losses than the TFM. Furthermore, the four outer rotor radial flux machines are optimized and compared with the outer rotor CPM. The calculated results of the outer rotor TFM are compared with the experiment results, showing that the analysis results match well with the experiment ones. Several useful and interesting conclusions have been obtained for the electrical machines with SMC cores.
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robust multidisciplinary design optimization of pm machines with soft Magnetic Composite cores for batch production
IEEE Transactions on Magnetics, 2016Co-Authors: Gang Lei, Youguang Guo, Chengcheng Liu, Jianguo ZhuAbstract:This paper presents a robust approach for multidisciplinary design optimization of permanent magnet (PM) motors with soft Magnetic Composite (SMC) cores to improve their manufacturing quality in batch production. First, a general multidisciplinary design analysis framework is developed for PM-SMC motors, which includes electroMagnetic, thermal, modal, and manufacturing analyses. Second, an improved multilevel optimization method is presented to improve the efficiency of the robust optimization. Finally, to demonstrate the effectiveness, a PM-SMC transverse flux machine is investigated. The numerical solutions, including electroMagnetic and thermal analyses, are validated by the experimental results. As shown, the proposed method can significantly increase motor’s reliability and greatly reduce the computation cost, which benefits the mass production in industrial applications.
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development of a low cost double rotor axial flux motor with soft Magnetic Composite and ferrite permanent magnet materials
Journal of Applied Physics, 2015Co-Authors: Chengcheng Liu, Jianguo Zhu, Youhua Wang, Youguang Guo, Gang Lei, Xiaojing LiuAbstract:This paper proposes a low-cost double rotor axial flux motor (DRAFM) with low cost soft Magnetic Composite (SMC) core and ferrite permanent magnets (PMs). The topology and operating principle of DRAFM and design considerations for best use of Magnetic materials are presented. A 905 W 4800 rpm DRAFM is designed for replacing the high cost NdFeB permanent magnet synchronous motor (PMSM) in a refrigerator compressor. By using the finite element method, the electroMagnetic parameters and performance of the DRAFM operated under the field oriented control scheme are calculated. Through the analysis, it is shown that that the SMC and ferrite PM materials can be good candidates for low-cost electric motor applications.
