CES Transactions on Electrical Machines and Systems最新文献_第7页

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":"7 4","pages":"397-403"},"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":"7 4","pages":"372-378"},"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

Harmonics in the Squirrel Cage Induction Motor, Analytic Calculation Part II: Synchronous Parasitic Torques, Radial Magnetic Forces 鼠笼式感应电机中的谐波，分析计算第二部分：同步寄生转矩，径向磁力

CES Transactions on Electrical Machines and Systems Pub Date : 2023-08-04 DOI: 10.30941/CESTEMS.2023.00035

G. Kovács

{"title":"Harmonics in the Squirrel Cage Induction Motor, Analytic Calculation Part II: Synchronous Parasitic Torques, Radial Magnetic Forces","authors":"G. Kovács","doi":"10.30941/CESTEMS.2023.00035","DOIUrl":"10.30941/CESTEMS.2023.00035","url":null,"abstract":"The magnetic field generated in the air gap of the cage asynchronous machine and the harmonics of the magnetomotive forces creating that magnetic field, as well as the synchronous parasitic torques, radial magnetic forces have been discussed in great detail in the literature, but always separately, for a long time. However, systematization of the phenomenon still awaits. Therefore, it is worth summarizing the completeness of the phenomena in a single study – with a new approach at the same time - in order to reveal the relationships between them. The role of rotor slot number is emphasized much more than before. New formulas derived for both synchronous torques and radial magnetic forces are used for further investigation. It will be shown that both phenomena in subject must be treated together. Formulas will be provided to take into account attenuation. Design guide will be provided to avoid dangerous rotor slot numbers. It will be shown that the generation of synchronous torques and radial magnetic forces do not depend – in this new approach - on the slot combination, but on the rotor slot number itself.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"7 4","pages":"404-421"},"PeriodicalIF":0.0,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10209558","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79986178","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

An Improved Preisach Distribution Function Identification Method Considering the Reversible Magnetization 考虑到可逆磁化的改进型普雷萨赫分布函数识别方法

CES Transactions on Electrical Machines and Systems Pub Date : 2023-07-12 DOI: 10.30941/CESTEMS.2023.00038

Long Chen;Lvsheng Cui;Tong Ben;Libing Jing

引用次数: 0

Cooling System Design Optimization of an Enclosed PM Traction Motor for Subway Propulsion Systems 地铁牵引系统中封闭式永磁牵引电机冷却系统的优化设计

CES Transactions on Electrical Machines and Systems Pub Date : 2023-07-12 DOI: 10.30941/CESTEMS.2023.00037

Longnv Li;Nan Jia;Xizhe Wang;Yiran Yun;Gaojia Zhu

{"title":"Cooling System Design Optimization of an Enclosed PM Traction Motor for Subway Propulsion Systems","authors":"Longnv Li;Nan Jia;Xizhe Wang;Yiran Yun;Gaojia Zhu","doi":"10.30941/CESTEMS.2023.00037","DOIUrl":"10.30941/CESTEMS.2023.00037","url":null,"abstract":"This paper presents the design optimization of a self-circulated ventilation system for an enclosed permanent magnet (PM) traction motor utilized in the propulsion systems for subway trains. In order to analyze accurately the machine's inherent cooling capacity when the train is running, the ambient airflow and the related heat transfer coefficient (HTC) are numerically investigated considering synchronously the bogie installation structure. The machine is preliminary cooled with air ducts set on the motor shell, and the fluidic-thermal field distributions with only the shell air duct cooling are numerically calculated. During simulations, the HTC obtained in the former steps is applied to the external surface of the machine to model the inherent cooling characteristic caused by the train movement. To reduce the temperature rise and thus guarantee the motor's working reliability, an internal self-circulated air cooling system is proposed according to the machine temperature distribution. The air enclosed in the end-caps is driven by the blades mounted on both sides of the rotor core and forms two air circuits to bring the excessive power losses generated in the heating components to cool regions. The fluid flow and temperature rise distributions of the cooling system's structural parameters are further improved by the Taguchi method in order to confirm the efficacy of the internal air cooling system.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"7 4","pages":"390-396"},"PeriodicalIF":0.0,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10181101","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76190611","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

An Improved DITC Control Method Based on Turn-On Angle Optimization 基于开启角度优化的改进型 DITC 控制方法

CES Transactions on Electrical Machines and Systems Pub Date : 2023-07-12 DOI: 10.30941/CESTEMS.2023.00043

Chaozhi Huang;Wensheng Cao;Zhou Chen;Yuliang Wu;Yongmin Geng

{"title":"An Improved DITC Control Method Based on Turn-On Angle Optimization","authors":"Chaozhi Huang;Wensheng Cao;Zhou Chen;Yuliang Wu;Yongmin Geng","doi":"10.30941/CESTEMS.2023.00043","DOIUrl":"10.30941/CESTEMS.2023.00043","url":null,"abstract":"Switched reluctance motor (SRM) usually adopts Direct Instantaneous Torque Control (DITC) to suppress torque ripple. However, due to the fixed turn-on angle and the control mode of the two-phase exchange region, the conventional DITC control method has low adaptability in different working conditions, which will lead to large torque ripple. For this problem, an improved DITC control method based on turn-on angle optimization is proposed in this paper. Firstly, the improved BP neural network is used to construct a nonlinear torque model, so that the torque can be accurately fed back in real time. Secondly, the turn-on angle optimization algorithm based on improved GRNN neural network is established, so that the turn-on angle can be adjusted adaptively online. Then, according to the magnitude of inductance change rate, the two-phase exchange region is divided into two regions, and the phase with larger inductance change rate and current is selected to provide torque in the sub- regions. Finally, taking a 3-phase 6/20 SRM as example, simulation and experimental verification are carried out to verify the effectiveness of this method.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"7 4","pages":"379-389"},"PeriodicalIF":0.0,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10181104","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78883252","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

Harmonics in the Squirrel Cage Induction Motor Analytic Calculation - Part I: Differential Leakage, Attenuation, Asynchronous Parasitic Torques 鼠笼式感应电动机中的谐波分析计算——第一部分：差动泄漏、衰减、异步寄生转矩

CES Transactions on Electrical Machines and Systems Pub Date : 2023-07-12 DOI: 10.30941/CESTEMS.2023.00034

G. Kovács

{"title":"Harmonics in the Squirrel Cage Induction Motor Analytic Calculation - Part I: Differential Leakage, Attenuation, Asynchronous Parasitic Torques","authors":"G. Kovács","doi":"10.30941/CESTEMS.2023.00034","DOIUrl":"https://doi.org/10.30941/CESTEMS.2023.00034","url":null,"abstract":"The magnetic field generated in the air gap of the cage asynchronous machine and the harmonics of the magnetomotive forces creating that magnetic field, as well as the related differential leakage, attenuation, asynchronous parasitic torques have been discussed in great detail in the literature, but always separately, for a long time. However, systematization of the phenomenon still awaits. Therefore, it is worth summarizing the completeness of the phenomena in a single study – with a new approach at the same time - in order to reveal the relationships between them. The role of rotor slot number is emphasized much more than before. An existing, commonly used, but still impractical basic figure has been modified to more clearly demonstrate the response of the rotor for the harmonics of the stator. The need to treat differential leakage, asynchronous parasitic torques and attenuation together will be demonstrated: new formula for asynchronous parasitic torque is derived; the long-used characteristic curves for differential leakage and attenuation used separately so far was merged into one, correct curve in order to provide a correct design guide for the engineers.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"7 3","pages":"320-329"},"PeriodicalIF":0.0,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873789/10272303/10181100.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68150002","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

Speed Identification of Speed Sensorless Linear Induction Motor Based on MRAS 基于MRAS的无速度传感器直线感应电机转速识别

CES Transactions on Electrical Machines and Systems Pub Date : 2023-07-12 DOI: 10.30941/CESTEMS.2023.00032

Xuan Tu;Xinguo Hou;Jinghong Zhao;Sinian Yan;Yiyong Xiong

{"title":"Speed Identification of Speed Sensorless Linear Induction Motor Based on MRAS","authors":"Xuan Tu;Xinguo Hou;Jinghong Zhao;Sinian Yan;Yiyong Xiong","doi":"10.30941/CESTEMS.2023.00032","DOIUrl":"https://doi.org/10.30941/CESTEMS.2023.00032","url":null,"abstract":"In the linear induction motor control system, the optical grating speed transducer is susceptible to strong magnetic field interference. What's more, it may reduce motor integration and raise device costs. Therefore a speed identification method to replace grating speed transducer is studied in this article. This speed identification method for linear induction motor mainly adopts Model Reference Adaptive Method (Abbreviated as MRAS) and Popov Hyperstability Theory. The research content of this paper can be divided into four parts. First, the mathematical model of the motor based on the model reference adaptive system structure is deduced. Second, the adaptive law of the estimated speed is solved by Popov hyper-stability theory, which ensures the stability of the system. Third, the simulation model of the linear induction motor speed identification control system based on model reference adaptation is built in the MATLAB environment. Finally, the simulation test and analysis are carried out. The simulation results show that the speed identification control system can track the actual speed of the linear induction motor well in the no-load operation and the load operation, and the stability of the system is guaranteed in the full speed range.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"7 3","pages":"294-300"},"PeriodicalIF":0.0,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873789/10272303/10181099.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68150008","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

Design Optimization of a Novel Axial-Radial Flux Permanent Magnet Claw Pole Machine with SMC Cores and Ferrite Magnets 采用 SMC 铁芯和铁氧体磁铁的新型轴向-径向磁通永磁爪极机的设计优化

CES Transactions on Electrical Machines and Systems Pub Date : 2023-07-12 DOI: 10.30941/CESTEMS.2023.00041

Chengcheng Liu;Fan Yang;Wenfeng Zhang;Youhua Wang

{"title":"Design Optimization of a Novel Axial-Radial Flux Permanent Magnet Claw Pole Machine with SMC Cores and Ferrite Magnets","authors":"Chengcheng Liu;Fan Yang;Wenfeng Zhang;Youhua Wang","doi":"10.30941/CESTEMS.2023.00041","DOIUrl":"10.30941/CESTEMS.2023.00041","url":null,"abstract":"Soft magnetic composite (SMC) material is an ideal soft magnetic material employed for developing 3D magnetic flux electromagnetic equipment, due to its advantages of 3D magnetic isotropy characteristic, low eddy current loss, and simple manufacturing process. The permanent magnet claw pole machine (PMCPM) with SMC cores is a good case that the SMC to be adopted for developing 3D flux electrical machines. In this paper, a novel axial-radial flux permanent magnet claw pole machine (ARPMCPM) with SMC cores and ferrite magnets is proposed. Compared with the traditional PMCPM, the proposed ARPMCPM is designed with only one spoke PM rotor and its whole structure is quite compact. For the performance prediction, the 3D finite element method (FEM) is used. Meanwhile, for the performance evaluation, a previously developed axial flux claw pole permanent magnet machine (AFCPM) is employed as the benchmark machine and all these machines are optimized by using the combined multilevel robust Taguchi method. It can be seen that the proposed ARPMCPM is with higher torque/weight density and operation efficiency.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"7 4","pages":"358-365"},"PeriodicalIF":0.0,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10181103","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84539763","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

Permanent Magnet Axial Section Shaping Optimization Surface-Mounted Permanent Magnet Synchronous Motor 永磁体轴向截面整形优化表面贴装式永磁同步电机

CES Transactions on Electrical Machines and Systems Pub Date : 2023-06-20 DOI: 10.30941/CESTEMS.2023.00036

Shengnan Wu;Qifeng Zhao;Wenming Tong

{"title":"Permanent Magnet Axial Section Shaping Optimization Surface-Mounted Permanent Magnet Synchronous Motor","authors":"Shengnan Wu;Qifeng Zhao;Wenming Tong","doi":"10.30941/CESTEMS.2023.00036","DOIUrl":"10.30941/CESTEMS.2023.00036","url":null,"abstract":"In this paper, a new type of harmonic injection permanent magnet shape optimization method is proposed to suppress the torque ripple of surface-mounted permanent magnet synchronous motor. The sinusoidal waveform shaping of the axial section of the permanent magnet is added with the third harmonic shaping, and the sine wave and the third harmonic are derived. The optimal ratio is 6:1. The permanent magnet no shaping, sinusoidal shaping and sinusoidal combined third harmonic shaping are compared. The results show that the sinusoidal combined third harmonic shaping design can effectively suppress the torque ripple of the surface mounted permanent magnet synchronous motor and obtain a relatively large output torque. At the same time, a method of using permanent magnet segmentation to approximately equivalently replace sine combined with third harmonic shaping design is proposed, which effectively saves the manufacturing cost of permanent magnets and provides design and research ideas for more economical and effective optimization of surface-mounted permanent magnet motors.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"7 4","pages":"366-371"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10158483","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82965491","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