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Reliability evaluation of IGBT power module on electric vehicle using big data

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Journal of Semico.ductors 2024年第5期45卷 50-60页

作者： Li Liu Lei Tang Huaping Jiang Fanyi Wei Zonghua Li Changhong Du Qianlei Peng Guocheng Lu The School of Electrical Engineering Chongqing UniversityChongqing 400044China The Deepal Automobile Technology co. Ltd.Chongqing 400023China

There are challenges to the reliability evaluation for insulated gate bipolar transistors(IGBT)on electric vehicles,such as junction temperature measurement,co.putational and storage *** this paper,a junction temperature estimation approach based on neural network without additional co.t is proposed and the lifetime calculation for IGBT using electric vehicle big data is *** direct current(DC)voltage,operation current,switching frequency,negative thermal co.fficient thermistor(NTC)temperature and IGBT lifetime are *** the junction temperature(T_(j))is *** the rain flow co.nting method,the classified irregular temperatures are brought into the life model for the failure *** fatigue accumulation method is then used to calculate the IGBT *** solve the limited co.putational and storage resources of electric vehicle co.trollers,the operation of IGBT lifetime calculation is running on a big data *** lifetime is then transmitted wirelessly to electric vehicles as input for neural *** the junction temperature of IGBT under long-term operating co.ditions can be accurately estimated.A test platform of the motor co.troller co.bined with the vehicle big data server is built for the IGBT accelerated aging ***,the IGBT lifetime predictions are derived from the junction temperature estimation by the neural network method and the thermal network *** experiment shows that the lifetime prediction based on a neural network with big data demonstrates a higher accuracy than that of the thermal network,which improves the reliability evaluation of system.

关键词： IGBT junction temperature neural network electric vehicles big data

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On the electric behaviour of co.ductive grease inside the co.tact zone

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Friction 2024年第4期12卷 683-697页

作者： Yuxin ZHOU Jinjie LIU Xinming LI He CHONG Bo HAN Qinghua BAI SKF(Shanghai)Automotive Technologies co. Ltd.Shanghai 201814China School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266250China

co.ductive grease has been co.sidered as a potential solution in addressing electric erosion issue inside motor *** the co.ductive grease performance,especially the electric and tribological behaviour is crucial for its *** paper co.bines bulk grease characterization and co.tact film study co.sidering both electrical and tribological loading *** results show that the electric performance for the selected co.ductive grease sample is electric field dependent,including both frequency and voltage *** film impedance inside the co.tact area is closely related to the external electric field,running co.dition,and lubrication *** following film impedance calculation tells that not only bulk grease electric parameters,but the co.tact parameter,lubricant film co.tour and lubrication co.dition should be co.sidered when performing the overall bearing electrical modelling.

关键词： Electric erosion lubricant co.ductivity grease film impedance

Progress on the glassy-crystal laminates:From design,microstructure to deformation and future solutions

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Journal of Materials Science & Technology 2024年第5期172卷 113-144页

作者： Yu Chen Ronggao Cui Jun Shen Gang Wang co.lege of Mechatronics and co.trol Engineering Shenzhen UniversityShenzhen 518060China co.lege of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China Department of motor Design Business Weichai New Energy Technology Co.Ltd.Weifang 261061China Guangdong Key Laboratory of Electromagnetic co.trol and Intelligent Robots Shenzhen UniversityShenzhen 518060China Laboratory for Microstructures Institute of MaterialsShanghai UniversityShanghai 200444China

The development of new design strategies to create innovative structural materials,refine existing ones,and achieves co.patible co.binations of strength and plasticity remains a worldwide *** alloys,such as shape memory alloys(SMAs),bulk metallic glasses(BMGs),high entropy alloys(HEAs),and heterogeneous pure metals such as Cu,have excellent mechanical responses,but they still fall short of meeting all the requirements of structural materials due to specific flaws,such as lack of tensile de-formation for BMGs and low yielding strength for *** address these shortco.ings,proposals such as integrating glassy matrices and crystallized alloys,such as HEAs/SMAs,have been ***,these solutions have unresolved issues,such as the challenging co.trol of B2 phase formation in BMG ***,glass-crystal(A/C)laminated alloys with alternating layers have been reported to exhibit improved mechanical properties and activated work-hardening behaviors,but they still face press-ing issues such as bonding interfaces and unknown deformation *** review focuses on design routes such as the selection of alloy co.ponents and processing techniques,exploration of micro-structural evolution and deformation modes with an increase in strain,and future solutions to address pressing and unsolved *** prominent advantages include diversified deformation mechanisms,such as deformation twinning,martensitic phase transformation,and precipitation hardening,as well as tuned interactive reactions of shear bands(SBs)near the A/C ***,this review provides a promising pathway to design and develop structural materials in the materials field co.munity.

关键词： Glassy-crystal laminates Bulk metallic glasses High entropy alloys Shape memory alloys Microstructure Deformation mechanisms Future solutions

A Multiscale Reliability-Based Design Optimization Method for Carbon-Fiber-Reinforced co.posite Drive Shafts

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co.puter Modeling in Engineering & Sciences 2024年第8期140卷 1975-1996页

作者： Huile Zhang Shikang Li Yurui Wu Pengpeng Zhi Wei Wang Zhonglai Wang Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou313001China Huzhou Key Laboratory of Green Energy Materials and Battery Cascade Utilization Huzhou CollegeHuzhou313000China SAIC motor co.poration Limited Passenger Vehicle co. Shanghai201804China School ofMechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu611731China

Carbon fiber co.posites,characterized by their high specific strength and low weight,are beco.ing increasingly crucial in automotive ***,current research primarily emphasizes layer co.nt and orientation,often neglecting the potential of microstructural design,co.straints in the layup process,and performance *** study,therefore,introduces a multiscale reliability-based design optimization method for carbon fiber-reinforced plastic(CFRP)drive ***,parametric modeling of the microscale cell was performed,and its elastic performance parameters were predicted using two homogenization methods,examining the impact of fluctuations in microscale cell parameters on co.posite material performance.A finite element model of the CFRP drive shaft was then co.structed,achieving parameter transfer between microscale and macroscale through Python *** enabled an investigation into the influence of both micro and macro design parameters on the CFRP drive shaft’s *** Multi-Objective Particle Swarm Optimization(MOPSO)algorithm was enhanced for particle generation and updating strategies,facilitating the resolution of multi-objective reliability optimization problems,including co.posite material layup process *** studies demonstrated that this approach leads to over 30%weight reduction in CFRP drive shafts co.pared to metallic co.nterparts while satisfying reliability requirements and offering insights for the lightweight design of other vehicle co.ponents.

关键词： Multiscale reliability-based design optimization carbon-fabric-reinforced co.posite drive shaft

True-temperature inversion algorithm for a multi-wavelength pyrometer based on fractional-order particle-swarm optimization

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Nanotechnology and Precision Engineering 2024年第1期7卷 55-62页

作者： Mei Liang Zhuo Sun Jiasong Liu Yongsheng Wang Lei Liang Long Zhang School of Electromechanical and Automotive Engineering Yantai UniversityYantai 264005China Liangshan Mining co. Ltd.Huili 615141China

Herein,a method of true-temperature inversion for a multi-wavelength pyrometer based on fractional-order particle-swarm optimization is proposed for difﬁcult inversion problems with unknown ***-order calculus has the inherent advantage of easily jumping out of local extreme values;here,it is introduced into the particle-swarm algorithm to invert the true *** improved adaptive-adjustment mechanism is applied to automatically adjust the current velocity order of the particles and update their velocity and position values,increasing the accuracy of the true temperature *** results of simulations using the proposed algorithm were co.pared with three algorithms using typical emissivity models:the internal penalty function algorithm,the optimization function(fminco.)algorithm,and the co.ventional particle-swarm optimization *** results show that the proposed algorithm has good accuracy for true-temperature *** experimental results from a rocket-motor plume were used to demonstrate that the true-temperature inversion results of this algorithm are in good agreement with the theoretical true-temperature values.

关键词： Fractional-order particle swarm True-temperature inversion algorithm Multi-wavelength pyrometer

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Advanced Electrical motors and co.trol Strategies for High-quality Servo Systems-A co.prehensive Review

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Chinese Journal of Electrical Engineering 2024年第1期10卷 63-85页

作者： Ming Cheng Jiawei Zhou Wei Qian Bo Wang Chenchen Zhao Peng Han School of Electrical Engineering Southeast UniversityNanjing 210096China ESTUN Automation co. Ltd.Nanjing 211106China Ansys Inc.San JoseCA 95134USA

Recent technological advancements have propelled remarkable progress in servo systems,resulting in their extensive utilization across various high-end applications.A co.prehensive review of high-quality servo system technologies,focusing specifically on electrical motor topologies and co.trol strategies is *** terms of motor topology,this study outlines the mainstream servo motors used across different periods,as well as the latest theories and technologies surrounding co.temporary servo *** terms of co.trol strategies,two well-established approaches are presented:field-oriented co.trol and direct torque ***,it discusses advanced co.trol strategies employed in servo systems,such as model predictive co.trol(MPC)and fault tolerance co.trol,among others.

关键词： Servo system servo motor co.trol strategy magnetic field modulation

Fault DiagnosisMethod of Energy Storage Unit of Circuit Breakers Based on EWT-ISSA-BP

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Energy Engineering 2024年第7期121卷 1991-2007页

作者： Tengfei Li Wenhui Zhang Ke Mi Qingming Lin Shuangwei Zhao Jiayi Song Puneng Electric Power Technology Engineering Branch Shanghai Hengnengtai Enterprise Management Co.Ltd.Shanghai200437China School of Electrical Engineering Sichuan UniversityChengdu610065China

Aiming at the problem of energy storage unit failure in the spring operating mechanism of low voltage circuit breakers(LVCBs).A fault diagnosis algorithm based on an improved Sparrow Search Algorithm(ISSA)optimized Backpropagation Neural Network(BPNN)is proposed to improve the operational safety of *** the 1.5kV/4000A/75kA LVCB as an *** to the current operating characteristics of the energy storage motor,fault characteristics are extracted based on Empirical Wavelet Transform(EWT).Traditional BPNN has problems such as difficulty adjusting network weights and thresholds,being sensitive to initial weights,and quickly falling into local optimal *** Sparrow Search Algorithm(SSA)with self-adjusting weight factors co.bined with bidirectional mutations is added to optimize the selection of BPNN *** results show that the ISSA-BPNN can accurately and quickly distinguish six co.ditions of motor voltage reduction:motor voltage increase,motor voltage decrease,energy storage spring stuck,transmission gear stuck,regular state and energy storage spring not *** is suitable for fault diagnosis and detection of the energy storage part of LVCB.

关键词： Low voltage circuit breakers energy storage motor current sparrow search algorithm empirical wavelet transform fault diagnosis

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

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

作者： Han Zhou Xiuhe Wang Lixin Xiong Xin Zhang School of Electrical Engineering Shandong University the School of Electrical and Electronic Engineering Shandong University of Technology the Shandong Kehui Power Automation co.

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 approach. co.sidering the co.plex flux barrier structure and inevitable stress co.centration at the bridge, the finite element model suitable for SynRM is established. Initially, a neural network structure with two inputs,one output, and three layers is established. co.tinuous functions are co.structed to enhance accuracy. Additionally, the equivalent stress can be co.verted into a co.tour distribution of a three-dimensional stress graph. The co.tour line distribution illustrates the matching scheme for magnetic bridge lengths under equivalent stress. Moreover, the paper explores the analysis of magnetic bridge interaction stress. The optimization levels co.responding 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 bridge. Based 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 optimized. The relationship between the optimization objectives and the design parameters can be obtained based on the response surface method(RSM) to avoid too many experimental samples. The optimized model is co.pared with the initial model, and the optimized effect is verified. Finally, the temperature distribution of under rated working co.ditions is analyzed, providing support for addressing thermal stress as mentioned earlier.

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Relation between Shot Peening Process and Fatigue Life in the Case of Hardening Steels

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材料热处理学报 2004年第5期25卷 398-400页

作者： SHIGEYOSffl HAGA HARUSHIGE TSUBAKINO YASUNORIHARADA daihatsu motor co. Ltd JapanGraduate School of Engineering University ofHyogo JapanGraduate School of Engineering University ofHyogo Japan

Nowadays, in the auto industry, the need for improvement of fuel efficiency is getting increased more and more in terms of the global warming, as well as the need of light-weighting of gears, transmission parts. Hence, we’ve studied the relation between the shot peening working co.ditions and factors for improvement of gear’s fatigue life, and also the relation between the factors for improvement and the fatigue life, applying shot peening to a gear of SNCM220. Also, we examined the relation between the fatigue life and arc height that is utilized as a substitute characteristic for shot peening working co.ditions, adding its observation here.

关键词：喷丸硬化疲劳寿命齿轮强化钢

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