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Analysis and Research on Mechanical Stress and Multiobjective Optimization of Synchronous Reluctance Motor

CES Transactions on Electrical Machines and Systems 2024年第3期8卷 274-283页

作者： Han Zhou xiuhe wang Lixin Xiong Xin Zhang School of Electrical Engineering Shandong UniversityJinan 250061China School of Electrical and Electronic Engineering Shandong University of TechnologyZibo 255000China Shandong Kehui Power Automation Co. Zibo 255000China

The mechanical strength of the synchronous reluctance motor(SynRM)has always been a great *** paper presents an analysis method for assessing stress equivalence and magnetic bridge stress interaction,along with a multiobjective optimization *** the complex flux barrier structure and inevitable stress concentration at the bridge,the finite element model suitable for SynRM is ***,a neural network structure with two inputs,one output,and three layers is *** functions are constructed to enhance ***,the equivalent stress can be converted into a contour distribution of a three-dimensional stress *** contour line distribution illustrates the matching scheme for magnetic bridge lengths under equivalent ***,the paper explores the analysis of magnetic bridge interaction *** optimization levels corresponding to the length of each magnetic bridge are defined,and each level is analyzed by the finite element *** Taguchi method is used to determine the specific gravity of the stress source on each magnetic *** on this,a multiobjective optimization employing the Multiobjective Particle Swarm Optimization(MOPSO)technique is *** taking the rotor magnetic bridge as the design parameter,ten optimization objectives including air-gap flux density,sinusoidal property,average torque,torque ripple,and mechanical stress are *** relationship between the optimization objectives and the design parameters can be obtained based on the response surface method(RSM)to avoid too many experimental *** optimized model is compared with the initial model,and the optimized effect is ***,the temperature distribution of under rated working conditions is analyzed,providing support for addressing thermal stress as mentioned earlier.

关键词： Multiobjective optimization Neural network Stress equivalence Synchronous reluctance motor Taguchi method

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交流调磁型永磁同步电机磁通协同调控最大转矩铜耗比控制

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电工技术学报 2024年第12期39卷 3630-3645页

作者：王柄东王道涵王晓姬许广生王秀和山东大学电气工程学院济南250061

电动汽车驱动系统不仅需要拥有宽广的调速范围和恒功率运行区域,还应具备高效率、低损耗的优点,以实现续航的最大化。针对这些技术特点,该文研究了一种调磁性能优越的交流调磁型永磁同步电机(ACFR-PMSM),分别建立其等效磁路模型和稳态... 详细信息

电动汽车驱动系统不仅需要拥有宽广的调速范围和恒功率运行区域,还应具备高效率、低损耗的优点,以实现续航的最大化。针对这些技术特点,该文研究了一种调磁性能优越的交流调磁型永磁同步电机(ACFR-PMSM),分别建立其等效磁路模型和稳态数学模型。并以该电机特殊的径向-轴向结构为基础,研究了其电感特性和转矩输出特性,从理论的角度论证了实现最大转矩铜耗比(MTPCL)控制的可行性。另外,分别采用拉格朗日乘子法和电流选择穷举法,获得了MTPCL控制的径-轴向定子绕组最佳电流选择方案。最后,实现了所提出控制策略的计算机仿真和样机测试,验证了其良好的动态控制性能,详细对比了经典id=0控制和所提出MTPCL控制的实施效果并计算了运行铜耗。

关键词：交流调磁型永磁电机最大转矩铜耗比控制磁通协同调控

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乙型肝炎病毒与丙型肝炎病毒合并感染患者的生化免疫结果分析

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中外医疗 2024年第7期43卷 48-50,75页

作者：王秀和莆田涵江医院检验科福建莆田351100

目的探讨乙型肝炎病毒与丙型肝炎病毒合并感染患者的生化免疫结果。方法回顾性选取2018年10月-2022年10月莆田涵江医院确诊为乙型肝炎病毒和(或)丙型肝炎病毒感染的120例患者的临床资料,其中40例合并感染患者为观察组,40例乙型肝炎病毒... 详细信息

目的探讨乙型肝炎病毒与丙型肝炎病毒合并感染患者的生化免疫结果。方法回顾性选取2018年10月-2022年10月莆田涵江医院确诊为乙型肝炎病毒和(或)丙型肝炎病毒感染的120例患者的临床资料,其中40例合并感染患者为观察组,40例乙型肝炎病毒感染患者为观察1组,40例丙型肝炎病毒感染患者为观察2组,均进行生化免疫指标检验,观察和记录3组的免疫结果。结果观察组各项免疫学指标相比于观察1组、观察2组更高,差异有统计学意义(P均<0.05)。观察组肝功能指标相比于观察1组更低,相比于观察2组更高,差异有统计学意义(P均<0.05)。观察组凝血酶原时间相比于观察1组、观察2组更高;凝血酶原活动度相比于观察1组、观察2组更低,差异有统计学意义(P均<0.05)。结论乙型肝炎病毒与丙型肝炎病毒合并感染会降低患者的肝脏储备能力,增强炎症反应的发生,加重肝脏的损伤,同时凝血能力增强,可能会促使血栓的形成。

关键词：乙型肝炎病毒丙型肝炎病毒 γ-干扰素白介素-6 白介素-10

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Permanent Magnet Assisted Synchronous Reluctance Motor with Asymmetric Rotor for High Torque Performance

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CES Transactions on Electrical Machines and Systems 2023年第2期7卷 179-186页

作者： Chengwu Diao Wenliang Zhao Yan Liu xiuhe wang the School of Electrical Engineering Shandong UniversityJinan250061China IEEE the China Aviation Control System Research Institute Wuxi214000China

Permanent magnet assisted synchronous reluctance motor(PMA-SynRM)is a kind of high torque density energy conversion device widely used in modern *** this paper,based on the basic topology of PMA-SynRM,a novel PMA-SynRM of asymmetric rotor with position-biased magnet is *** asymmetric rotor design with position-biased magnet realizes the concentration of magnetic field lines in the motor air gap to obtain higher electromagnetic torque,and makes both of magnetic and reluctance torque obtain the peak value at the same current phase *** asymmetric rotor configuration is theoretically illustrated by space vector diagram,and the feasibility of high torque performance of the motor is *** the finite element simulation,the effect of the side barrier on output torque and the Mises stress under the rotor asymmetrical design are *** the motor characteristics including airgap flux density,back EMF,magnetic torque,reluctance torque,torque ripple,losses,and efficiency are calculated for both the basic and proposed *** results show that the proposed PMA-SynRM has higher torque and efficiency than the basic ***,the torque ripple of the proposed PMA-SynRM is reduced by the method with harmonic current injection,and the torque characteristics in the whole current cycle are ***,the endurance to avoid PM demagnetization is confirmed based on the PM remanence calculation.

关键词： Permanent magnet assisted synchronous reluctance motor Asymmetric rotor Magnetic torque Reluctance torque Torque ripple

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Torque Improvement of Spoke-type Permanent Magnet Motor with Auxiliary Stator Using Harmonic Current Control Strategy

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CES Transactions on Electrical Machines and Systems 2023年第2期7卷 210-217页

作者： Hao Wu Wenliang Zhao Zheng Li xiuhe wang the School of Electrical Engineering Shandong UniversityJinan250061China IEEE the Jinan Heating Group CO.LTD. Jinan250011China

The spoke-type permanent magnet motor with auxiliary stator exhibits high torque performance owing to the flux focus *** further improve its torque density,this paper proposes a control method by using harmonic current *** on the theoretical analysis,a 3-D torque look-up table by dq-axis current and electrical angle is established with the aid of the finite element method(FEM).The maximum torque per ampere curve at each rotor position is identified and summarized to adequately indicate the relationship between torque and current amplitude of the *** theoretical derivation,it is concluded that the minimum torque cost curve is the contour line of?Te/?i2,which can be employed to identify the harmonic current for torque density *** to traditional strategies,the proposed control strategy can increase torque density of forward and reverse torque by 1.22%and 1.40%,*** experimental results verify the analysis and simulation results,as well as prove the effectiveness of the proposed strategy.

关键词： Spoke-type permanent magnet motor Harmonic current Finite element method Torque density Torque cost

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Reduction of Cogging Torque and Electromagnetic Vibration Based on Different Combination of Pole Arc Coefficient for Interior Permanent Magnet Synchronous Machine

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CES Transactions on Electrical Machines and Systems 2021年第4期5卷 291-300页

作者： Feng Liu xiuhe wang Zezhi Xing Aiguo Yu Changbin Li the School of Electrical Engineering Shandong UniversityJinan 250061China the Qingdao Haidian Electric Co.Ltd Qingdao 266109China

Cogging torque and electromagnetic vibration are two important factors for evaluating permanent magnet synchronous machine(PMSM)and are key issues that must be considered and resolved in the design and manufacture of high-performance PMSM for electric vehicles.A fast and accurate magnetic field calculation model for interior permanent magnet synchronous machine(IPMSM)is proposed in this *** on the traditional magnetic potential permeance method,the stator cogging effect and complex boundary conditions of the IPMSM can be fully considered in this model,so as to realize the rapid calculation of equivalent magnetomotive force(MMF),air gap permeance,and other key electromagnetic *** this article,a 6-pole 36-slot IPMSM is taken as an example to establish its equivalent solution model,thereby the cogging torque is accurately *** the validity of this model is verified by a variety of different magnetic pole structures,pole slot combinations machines,and prototype *** addition,the improvement measure of the machine with different combination of pole arc coefficient is also studied based on this *** torque and electromagnetic vibration can be effectively *** with the finite element model and multi-physics coupling model,the electromagnetic characteristics and vibration performance of this machine are comprehensively compared and *** analysis results have well verified its *** can be extended to other structures or types of PMSM and has very important practical value and research significance.

关键词： Cogging torque different combination of pole arc coefficient electromagnetic vibration interior permanent magnet synchronous machine

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Analysis of Permanent Magnet-assisted Synchronous Reluctance Motor Based on Equivalent Reluctance Network Model

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CES Transactions on Electrical Machines and Systems 2022年第2期6卷 135-144页

作者： Changbin Li xiuhe wang Feng Liu Jie Ren Zezhi Xing Xinwei Gu School of Electrical Engineering Shandong UniversityJinan 250061China

In this paper,the equivalent reluctance network model(ERNM)is used to calculate the magnetic circuit of a permanent magnet-assisted synchronous reluctance motor(PMASynRM)and calculate no-load air-gap magnetic field and electromagnetic *** method is used to solve the relative permeability of iron core.A novel reluctance network model based on actual distribution of the magnetic flux inside the motor is *** magnetomotive force(MMF)generated by armature winding affects the relative permeability of iron core,which is considered in the calculation of ERNM to improve the accuracy when the motor is under *** can be used to measure air-gap flux density,no-load back electromotive force(EMF),the average value of motor torque,the armature winding voltage under load,and power *** method of calculating the motor performance is *** results of calculation are consistent with finite element method(FEM)and the computational complexity is much less than that of the *** results of ERNM has been verified,which will provide a simple method for motor design and analysis.

关键词： Permanent magnet-assisted synchronous reluctance motor(PMASynRM) Equivalent reluctance network model(ERNM) Air-gap flux density No-load back electromotive force(EMF) Torque

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Synthesis of Anti-Pancreatic Cancer Natural Product Majusculamide D and Analogues Reveals a Preliminary Structure-Activity Relationships

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Chinese Journal of Chemistry 2024年第6期42卷 605-610页

作者： xiuhe Zhao Mengxue Lv Xiaonan Xi Yaxin Lu Liang wang Yue Chen The State Key Laboratory of Medicinal Chemical Biology College of PharmacyNankai UniversityTianjin300350 China College of Chemistry Nankai UniversityTianjin300071 China

The total synthesis of majusculamide D(1)was achieved from commercially available *** addition,we synthesized eight analogues including three stereoisomers of majusculamide D that differ in the fatty acid *** analogues including a simplified analogue 29 exhibited significant nanomolar-level IC50 values against Panc-1 cells in MTT assays.A preliminary SAR analysis indicated that the hydroxyl group at C10 and C2−C3 unsaturated double bond of majusculamide D were essential in maintaining the high activity against Panc-1 cells and the orientation of C40-Me and C42-Me groups was tolerable.

关键词： Majusculamide D Natural products SAR Anti-pancreatic cancer Lipopentapeptide

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新型永磁型磁通切换型磁阻电机齿槽转矩机理分析和解析分析模型

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电工技术学报 2015年第10期30卷 77-82页

作者：王道涵王秀和山东大学电气工程学院济南250061

永磁型磁通切换型磁阻电机(PMFSM)是一种新型定子永磁型双凸极磁阻电机,具有励磁损耗低和效率高的特点。PMFSM独特的双凸极结构和固定的定转子齿数配合使其齿槽转矩问题较传统永磁电机更加突出。针对目前对PMFSM齿槽转矩研究的不足,本... 详细信息

永磁型磁通切换型磁阻电机(PMFSM)是一种新型定子永磁型双凸极磁阻电机,具有励磁损耗低和效率高的特点。PMFSM独特的双凸极结构和固定的定转子齿数配合使其齿槽转矩问题较传统永磁电机更加突出。针对目前对PMFSM齿槽转矩研究的不足,本文对比分析了PMFSM与传统永磁电机齿槽转矩机理特点和不同,建立了一套适合于PMFSM齿槽转矩解析分析方法,据此建立了与电机结构参数直接相关的PMFSM齿槽转矩解析模型,对削弱PMFSM的齿槽转矩具有重要的实际工程指导意义。

关键词：永磁型磁通切换型磁阻电机齿槽转矩解析分析模型有限元法

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基于多目标有效全局优化算法的直线感应电动机优化设计

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电工技术学报 2015年第24期30卷 32-37页

作者：宫金林王秀和山东大学电气工程学院济南250061

直接针对有限元模型的电机优化设计周期长、效率低。多目标有效全局优化算法基于Kriging代理模型引导采样,从而可以减少优化过程中有限元模型的迭代次数,缩短优化设计周期,并且保证了优化结果的准确度。同时将并行计算的方法与多目标有... 详细信息

直接针对有限元模型的电机优化设计周期长、效率低。多目标有效全局优化算法基于Kriging代理模型引导采样,从而可以减少优化过程中有限元模型的迭代次数,缩短优化设计周期,并且保证了优化结果的准确度。同时将并行计算的方法与多目标有效全局优化算法相结合,进一步提高了算法的效率。最后成功地将该算法应用于直线感应电动机的三维有限元模型的优化设计中,得到了经过有限元模型分析值组成的二维Pareto最优前沿解集,为基于有限元模型的直线感应电动机优化设计提供了新方法。

关键词：多目标有效全局优化 Kriging代理模型三维有限元模型直线感应电动机

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