CES Transactions on Electrical Machines and Systems最新文献_第5页

Optimization of Generator Based on Gaussian Process Regression Model with Conditional Likelihood Lower Bound Search 基于高斯过程回归模型的发电机优化与条件似然下限搜索

CES Transactions on Electrical Machines and Systems Pub Date : 2024-02-27 DOI: 10.30941/CESTEMS.2024.00001

Xiao Liu;Pingting Lin;Fan Bu;Shaoling Zhuang;Shoudao Huang

{"title":"Optimization of Generator Based on Gaussian Process Regression Model with Conditional Likelihood Lower Bound Search","authors":"Xiao Liu;Pingting Lin;Fan Bu;Shaoling Zhuang;Shoudao Huang","doi":"10.30941/CESTEMS.2024.00001","DOIUrl":"https://doi.org/10.30941/CESTEMS.2024.00001","url":null,"abstract":"The noise that comes from finite element simulation often causes the model to fall into the local optimal solution and over fitting during optimization of generator. Thus, this paper proposes a Gaussian Process Regression (GPR) model based on Conditional Likelihood Lower Bound Search (CLLBS) to optimize the design of the generator, which can filter the noise in the data and search for global optimization by combining the Conditional Likelihood Lower Bound Search method. Taking the efficiency optimization of 15 kW Permanent Magnet Synchronous Motor as an example. Firstly, this method uses the elementary effect analysis to choose the sensitive variables, combining the evolutionary algorithm to design the super Latin cube sampling plan; Then the generator-converter system is simulated by establishing a co-simulation platform to obtain data. A Gaussian process regression model combing the method of the conditional likelihood lower bound search is established, which combined the chi-square test to optimize the accuracy of the model globally. Secondly, after the model reaches the accuracy, the Pareto frontier is obtained through the NSGA-II algorithm by considering the maximum output torque as a constraint. Last, the constrained optimization is transformed into an unconstrained optimizing problem by introducing maximum constrained improvement expectation (CEI) optimization method based on the re-interpolation model, which cross-validated the optimization results of the Gaussian process regression model. The above method increase the efficiency of generator by 0.76% and 0.5% respectively; And this method can be used for rapid modeling and multi-objective optimization of generator systems.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10452307","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140342669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Investigation of Various Laminating Materials for Interior Permanent Magnet Brushless DC Motor for Cooling Fan Application 用于冷却风扇的内部永磁无刷直流电机的各种层压材料研究

CES Transactions on Electrical Machines and Systems Pub Date : 2023-12-28 DOI: 10.30941/CESTEMS.2023.00048

A. Infantraj;M. Augustine;E. Fantin Irudaya Raj;M. Appadurai

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CES Transactions on Electrical Machines and Systems Pub Date : 2023-12-28

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CES Transactions on Electrical Machines and Systems Pub Date : 2023-09-01

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CES Transactions on Electrical Machines and Systems Pub Date : 2023-09-01 DOI: 10.30941/CESTEMS.2023.00051

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An Enhanced Axial-Flux Magnetic-Geared Machine with Dual-Winding Design for Electric Vehicle Applications 一种用于电动汽车的双绕组增强型轴向磁通磁齿轮电机

CES Transactions on Electrical Machines and Systems Pub Date : 2023-09-01 DOI: 10.30941/CESTEMS.2023.00047

Weinong Fu;Qinying Wu;Shuangxia Niu;Yuanxi Chen;Xinhua Guo

{"title":"An Enhanced Axial-Flux Magnetic-Geared Machine with Dual-Winding Design for Electric Vehicle Applications","authors":"Weinong Fu;Qinying Wu;Shuangxia Niu;Yuanxi Chen;Xinhua Guo","doi":"10.30941/CESTEMS.2023.00047","DOIUrl":"https://doi.org/10.30941/CESTEMS.2023.00047","url":null,"abstract":"Axial-flux magnetic-geared machine (MGM) is a promising solution for electric vehicle applications for combining the virtues of both axial-flux electric machine and magnetic gear. However, generalized MGMs are limited by the torque density issue, accordingly inapplicable to industrial applications. To solve the abovementioned issue, an improved axial-flux magnetic-geared machine with a dual-winding design is proposed. The key merit of the proposed design is to achieve enhanced torque performance and space utilization with the proposed design, which installs a set of auxiliary winding between modulation rings. With the proposed design, overload protection capability, and fault-tolerant capability can be also achieved, for the proposed machine can work with either the excitation of armature windings or auxiliary windings. The pole-pair, slot combination, and parametric design is studied and optimized by the 3d finite-element method and designed C++ optimization software. Electromagnetic analysis and performance comparison indicate that the proposed machine can achieve a torque enhancement of 68.6% compared to the comparison machine.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873789/10272303/10272304.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68150012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of Star-Delta Soft Switch to Extend AC Motor High Speed Operation Region 星三角软开关扩展交流电机高速运行区域的研究

CES Transactions on Electrical Machines and Systems Pub Date : 2023-09-01 DOI: 10.30941/CESTEMS.2023.00049

Yixuan Shuai;Dong Jiang;Zhuo Chen;Zicheng Liu;Haijing Sun;Peng Li

{"title":"Study of Star-Delta Soft Switch to Extend AC Motor High Speed Operation Region","authors":"Yixuan Shuai;Dong Jiang;Zhuo Chen;Zicheng Liu;Haijing Sun;Peng Li","doi":"10.30941/CESTEMS.2023.00049","DOIUrl":"https://doi.org/10.30941/CESTEMS.2023.00049","url":null,"abstract":"In traction application, speed range of motor is an important index for motor drives. In AC motor control, the maximum speed of the motor is limited by the output voltage capability of the traditional three-phase inverter with star connenction of windings. Switching the star connection to delta connection in high-speed range can extend the speed range. In order to extend the speed operation region, star-delta switch proposed by many literatures relies on mechanical relay, which needs a dead zone of tens of milliseconds and seriously affects torque output. Besides, the traditional method will cause current overshoot during the switch transient process, decreasing the device security and reliability. Aiming at the defects existing in the star-delta hard switching, this paper proposes a star-delta soft switching method. Without adding extra power electronics devices, DC-bus capacitor is used to provide the path of zero axis current in the transient process, which helps to achieve the smooth torque output and zero current switch in the transient. Experiments have been done to validate the performance of the proposed method. The switching transient from star to delta connection in the motor drive can be much more stable than hard switching method.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873789/10272303/10272328.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68150011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on Inter-Turn Short-Circuit Fault Diagnosis Method Based on High Frequency Voltage Residual for PMSM 基于高频残余电压的永磁同步电机匝间短路故障诊断方法研究

CES Transactions on Electrical Machines and Systems Pub Date : 2023-09-01 DOI: 10.30941/CESTEMS.2023.00050

Xiaobao Feng;Bo Wang;Chaohui Liu;Jiayun Zeng;Zheng Wang

{"title":"Research on Inter-Turn Short-Circuit Fault Diagnosis Method Based on High Frequency Voltage Residual for PMSM","authors":"Xiaobao Feng;Bo Wang;Chaohui Liu;Jiayun Zeng;Zheng Wang","doi":"10.30941/CESTEMS.2023.00050","DOIUrl":"https://doi.org/10.30941/CESTEMS.2023.00050","url":null,"abstract":"Inter-turn fault is a serious stator winding short-circuit fault of permanent magnet synchronous machine (PMSM). Once it occurs, it produces a huge short-circuit current that poses a great risk to the safe operation of PMSM. Thus, an inter-turn short-circuit fault (ITSCF) diagnosis method based on high frequency (HF) voltage residual is proposed in this paper with proper HF signal injection. First, the analytical models of PMSM after the ITSCF are deduced. Based on the model, the voltage residual at low frequency (LF) and HF can be obtained. It is revealed that the HF voltage residual has a stronger ITSCF detection capability compared to the LF voltage residual. To obtain optimal fault signature, a 3-phase symmetrical HF voltage is injected into the machine drive system, and the HF voltage residuals are extracted. The fault indicator is defined as the standard deviation of the 3-phase HF voltage residuals. The effectiveness of the proposed ITSCF diagnosis method is verified by experiments on a triple 3-phase PMSM. It is worth noting that no extra hardware equipment is required to implement the proposed method.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873789/10272303/10272327.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68150007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Research on Thermal Calculation and End Winding Heat Conduction Optimization of Low Speed High Torque Permanent Magnet Synchronous Motor 低速大扭矩永磁同步电机的热计算与端部绕组导热优化研究

CES Transactions on Electrical Machines and Systems Pub Date : 2023-08-04 DOI: 10.30941/CESTEMS.2023.00039

Shengnan Wu;Zhimin Li;Wenming Tong

{"title":"Research on Thermal Calculation and End Winding Heat Conduction Optimization of Low Speed High Torque Permanent Magnet Synchronous Motor","authors":"Shengnan Wu;Zhimin Li;Wenming Tong","doi":"10.30941/CESTEMS.2023.00039","DOIUrl":"10.30941/CESTEMS.2023.00039","url":null,"abstract":"Because of its simple structure, large torque and high efficiency, permanent magnet synchronous motor of low speed and high torque is widely adopted in many fields. In this paper, a 394.5kW mining low-speed high-torque permanent magnet synchronous motor (LSHTPMSM) is regarded as the study object. According to the physical model, a three-dimensional equivalent heat transfer temperature field calculation model of the motor is built to simulate the temperature distribution of the motor under rated conditions. In terms of the serious issue of stator winding temperature increase of permanent magnet synchronous motor of low speed and high torque, the heat conduction optimization of the end of the stator winding is studied, which enhances the heat dissipation effect of the stator end winding, effectively reduces its temperature increase and temperature gradient with the winding in the slot, and improves the practical efficiency and service life of the motor. Finally, the motor temperature rise test platform is constructed for the verification of the feasibility of the optimization scheme, which provides a reference direction for the heat dissipation optimization of permanent magnet synchronous motor of low speed and high torque.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10209559","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81159910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-Objective Optimization Analysis of Auxiliary Flux Modulator Magnetic Gear with Unequal Magnetic Poles 具有不等磁极的辅助磁通调制器磁齿轮的多目标优化分析

CES Transactions on Electrical Machines and Systems Pub Date : 2023-08-04 DOI: 10.30941/CESTEMS.2023.00040

Zhan Su;Libing Jing

{"title":"Multi-Objective Optimization Analysis of Auxiliary Flux Modulator Magnetic Gear with Unequal Magnetic Poles","authors":"Zhan Su;Libing Jing","doi":"10.30941/CESTEMS.2023.00040","DOIUrl":"10.30941/CESTEMS.2023.00040","url":null,"abstract":"To enhance the output torque and minimize the torque ripple of coaxial magnetic gear (CMG), a novel auxiliary flux modulator CMG with unequal magnetic poles is proposed. This design incorporates an inner rotor with an asymmetric sector and a trapezoidal combined N-S pole structure, featuring Halbach arrays for the arrangement of permanent magnets (PMs). The outer rotor PMs adopt a Spoke-type configuration. To optimize the CMG for high output torque and low torque ripple, a sensitivity analysis is conducted to identify key size parameters that significantly influence the optimization objectives. Based on the sensitivity hierarchy of these parameters, a multi-objective optimization analysis is performed using a genetic algorithm (GA) to determine the optimal structural parameter values of the CMG. In addition, a coaxial magnetic gear (CMG) topology with 4 inner and 17 outer pole pairs is adopted, and the parametric model is established. Finally, the electromagnetic properties of the CMG are evaluated using the finite element method. The results indicate a remarkable reduction in torque ripple, specifically by 46.15%.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10209560","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82373159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0