Pub Date : 2024-03-09DOI: 10.30941/CESTEMS.2024.00014
Tayfun Gundogdu;Sinan Suli
The performance characteristics, particularly the starting performance of direct line-fed induction motors, which are mainly influenced by the design of the rotor, are crucial considerations for end-users. It is quite a challenging issue for motor manufacturers to enhance the starting performance of existing mass-produced motors with minimal modifications and expenses. In this paper, a simple and cost-effective method to improve the starting performance of a commercial squirrel-cage induction motor (SCIM) is proposed. The influence of geometric parameters of the end-ring on the performance characteristics, including starting (locked rotor) torque, pull-up and break down torque, starting current, rotor electric parameters, current density, power losses, and efficiency have been comprehensively investigated. It has been revealed that among the other end-ring design parameters, the ring thickness has a significant effect on the performance characteristics. An optimal end-ring thickness is determined, and its performance characteristics have been compared to those of its initial counterpart. Numeric and parametric analyses have been conducted using a 2D time-stepping finite element method (FEM). The FEM results were validated using experimental measurements obtained from an 11 kW SCIM prototype.
{"title":"Role of End-Ring Configuration in Shaping IE4 Induction Motor Performance","authors":"Tayfun Gundogdu;Sinan Suli","doi":"10.30941/CESTEMS.2024.00014","DOIUrl":"https://doi.org/10.30941/CESTEMS.2024.00014","url":null,"abstract":"The performance characteristics, particularly the starting performance of direct line-fed induction motors, which are mainly influenced by the design of the rotor, are crucial considerations for end-users. It is quite a challenging issue for motor manufacturers to enhance the starting performance of existing mass-produced motors with minimal modifications and expenses. In this paper, a simple and cost-effective method to improve the starting performance of a commercial squirrel-cage induction motor (SCIM) is proposed. The influence of geometric parameters of the end-ring on the performance characteristics, including starting (locked rotor) torque, pull-up and break down torque, starting current, rotor electric parameters, current density, power losses, and efficiency have been comprehensively investigated. It has been revealed that among the other end-ring design parameters, the ring thickness has a significant effect on the performance characteristics. An optimal end-ring thickness is determined, and its performance characteristics have been compared to those of its initial counterpart. Numeric and parametric analyses have been conducted using a 2D time-stepping finite element method (FEM). The FEM results were validated using experimental measurements obtained from an 11 kW SCIM prototype.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"8 3","pages":"245-254"},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10528229","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142368480","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}
Pub Date : 2024-03-01DOI: 10.30941/CESTEMS.2024.00004
Prabhakaran Koothu Kesavan;Umashankar Subramaniam;Dhafer J. Almakhles
This paper, evaluate the effectiveness of a proposed speed loop pseudo derivative feedforward (PDFF) controller-based direct torque controller (DTC) for a PMSM drive against the performance of existing PI speed controller-based DTC and hysteresis current controller (HCC). The proposed PDFF-based speed regulator effectively reduces oscillation and overshoot associated with rotor angular speed, electromagnetic torque, and stator current. Two case studies, one using forward-to-reverse motoring operation and the other involving reverse-to-forward braking operation, has been validated to show the effectiveness of the proposed control strategy. The proposed controller's superior performance is demonstrated through experimental verification utilizing an FPGA controller for a 1.5 kW PMSM drive laboratory prototype.
{"title":"Laboratory Implementation of Direct Torque Controller based Speed Loop Pseudo Derivative Feedforward Controller for PMSM Drive","authors":"Prabhakaran Koothu Kesavan;Umashankar Subramaniam;Dhafer J. Almakhles","doi":"10.30941/CESTEMS.2024.00004","DOIUrl":"https://doi.org/10.30941/CESTEMS.2024.00004","url":null,"abstract":"This paper, evaluate the effectiveness of a proposed speed loop pseudo derivative feedforward (PDFF) controller-based direct torque controller (DTC) for a PMSM drive against the performance of existing PI speed controller-based DTC and hysteresis current controller (HCC). The proposed PDFF-based speed regulator effectively reduces oscillation and overshoot associated with rotor angular speed, electromagnetic torque, and stator current. Two case studies, one using forward-to-reverse motoring operation and the other involving reverse-to-forward braking operation, has been validated to show the effectiveness of the proposed control strategy. The proposed controller's superior performance is demonstrated through experimental verification utilizing an FPGA controller for a 1.5 kW PMSM drive laboratory prototype.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"8 1","pages":"12-21"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10488431","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140342729","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}
Pub Date : 2024-03-01DOI: 10.30941/CESTEMS.2024.00011
Weihua Chen;Jingtao Jia;Xiaoheng Yan;Yuhang Song;Jiayi Li
To solve the low power transfer efficiency and magnetic field leakage problems of cardiac pacemaker wireless powering, we proposed a wireless power supply system suitable for implanted cardiac pacemaker based on mu-negative (MNG) and mu-near-zero (MNZ) metamaterials. First, a hybrid metamaterial consisted of central MNG unit for magnetic field concentration and surrounding MNZ units for magnetic leakage shielding was established by theoretical calculation. Afterwards, the magnetic field distribution of wireless power supply system with MNG-MNZ metamaterial slab was acquired via finite element simulation and verified to be better than the distribution with conventional MNG slab deployed. Finally, an experimental platform of wireless power supply system was established with which power transfer experiment and system temperature rise experiment were conducted. Simulation and experimental results showed that the power transfer efficiency was improved from 44.44%, 19.42%, 8.63% and 6.19% to 55.77%, 62.39%, 20.81% and 14.52% at 9.6 mm, 20 mm, 30 mm and 50 mm, respectively. The maximum SAR acquired by SAR simulation under human body environment was -7.14 dbm and maximum reduction of the magnetic field strength around the receiving coil was 2.82 A/m. The maximum temperature rise during 30min charging test was 3.85°C, and the safety requirements of human bodies were met.
{"title":"Wireless Power Supply Based on MNG-MNZ Metamaterial for Cardiac Pacemakers","authors":"Weihua Chen;Jingtao Jia;Xiaoheng Yan;Yuhang Song;Jiayi Li","doi":"10.30941/CESTEMS.2024.00011","DOIUrl":"https://doi.org/10.30941/CESTEMS.2024.00011","url":null,"abstract":"To solve the low power transfer efficiency and magnetic field leakage problems of cardiac pacemaker wireless powering, we proposed a wireless power supply system suitable for implanted cardiac pacemaker based on mu-negative (MNG) and mu-near-zero (MNZ) metamaterials. First, a hybrid metamaterial consisted of central MNG unit for magnetic field concentration and surrounding MNZ units for magnetic leakage shielding was established by theoretical calculation. Afterwards, the magnetic field distribution of wireless power supply system with MNG-MNZ metamaterial slab was acquired via finite element simulation and verified to be better than the distribution with conventional MNG slab deployed. Finally, an experimental platform of wireless power supply system was established with which power transfer experiment and system temperature rise experiment were conducted. Simulation and experimental results showed that the power transfer efficiency was improved from 44.44%, 19.42%, 8.63% and 6.19% to 55.77%, 62.39%, 20.81% and 14.52% at 9.6 mm, 20 mm, 30 mm and 50 mm, respectively. The maximum SAR acquired by SAR simulation under human body environment was -7.14 dbm and maximum reduction of the magnetic field strength around the receiving coil was 2.82 A/m. The maximum temperature rise during 30min charging test was 3.85°C, and the safety requirements of human bodies were met.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"8 1","pages":"103-112"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10488429","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140342749","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}
Pub Date : 2024-03-01DOI: 10.30941/CESTEMS.2024.00008
Beichen Ding;Yuting Lu;Kaide Huang;Guodong Feng;Chunyan Lai
This paper proposes a virtual position-offset injection based permanent magnet temperature estimation approach for permanent magnet synchronous machines (PMSMs). The concept of virtual position-offset injection is mathematically transforming the machine model to a virtual frame with a position-offset. The virtual frame temperature estimation model is derived to calculate the permanent magnet temperature (PMT) directly from the measurements with computation efficiency. The estimation model involves a combined inductance term, which can simplify the establishment of saturation compensation model with less measurements. Moreover, resistance and inverter distorted terms are cancelled in the estimation model, which can improve the robustness to the winding temperature rise and inverter distortion. The proposed approach can achieve simplified computation in temperature estimation and reduced memory usage in saturation compensation. While existing model-based approaches could be affected by either the need of resistance and inverter information or complex saturation compensation. Experiments are conducted on the test machine to verify the proposed approach under various operating conditions.
{"title":"Permanent Magnet Temperature Estimation for PMSMs Using Virtual Position-Offset Injection","authors":"Beichen Ding;Yuting Lu;Kaide Huang;Guodong Feng;Chunyan Lai","doi":"10.30941/CESTEMS.2024.00008","DOIUrl":"https://doi.org/10.30941/CESTEMS.2024.00008","url":null,"abstract":"This paper proposes a virtual position-offset injection based permanent magnet temperature estimation approach for permanent magnet synchronous machines (PMSMs). The concept of virtual position-offset injection is mathematically transforming the machine model to a virtual frame with a position-offset. The virtual frame temperature estimation model is derived to calculate the permanent magnet temperature (PMT) directly from the measurements with computation efficiency. The estimation model involves a combined inductance term, which can simplify the establishment of saturation compensation model with less measurements. Moreover, resistance and inverter distorted terms are cancelled in the estimation model, which can improve the robustness to the winding temperature rise and inverter distortion. The proposed approach can achieve simplified computation in temperature estimation and reduced memory usage in saturation compensation. While existing model-based approaches could be affected by either the need of resistance and inverter information or complex saturation compensation. Experiments are conducted on the test machine to verify the proposed approach under various operating conditions.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"8 1","pages":"51-60"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10488434","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140342728","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}
Active Magnetic Bearing (AMB) is a kind of electromagnetic support that makes the rotor movement frictionless and can suppress rotor vibration by controlling the magnetic force. The most common approach to restrain the rotor vibration in AMBs is to adopt a notch filter or adaptive filter in the AMB controller. However, these methods cannot obtain the precise amplitude and phase of the compensation current. Thus, they are not so effective in terms of suppressing the vibrations of the fundamental and other harmonic orders over the whole speed range. To improve the vibration suppression performance of AMBs, an adaptive filter based on Least Mean Square (LMS) is applied to extract the vibration signals from the rotor displacement signal. An Iterative Search Algorithm (ISA) is proposed in this paper to obtain the corresponding relationship between the compensation current and vibration signals. The ISA is responsible for searching the compensating amplitude and shifting phase online for the LMS filter, enabling the AMB controller to generate the corresponding compensation force for vibration suppression. The results of ISA are recorded to suppress vibration using the Look-Up Table (LUT) in variable speed range. Comprehensive simulations and experimental validations are carried out in fixed and variable speed range, and the results demonstrate that by employing the ISA, vibrations of the fundamental and other harmonic orders are suppressed effectively.
有源磁悬浮轴承（AMB）是一种通过控制磁力使转子运动无摩擦并能抑制转子振动的电磁支撑装置。抑制 AMB 转子振动最常用的方法是在 AMB 控制器中采用陷波滤波器或自适应滤波器。然而，这些方法无法获得补偿电流的精确幅值和相位。因此，它们在抑制整个转速范围内的基阶和其他谐阶振动方面效果不佳。为了提高 AMB 的振动抑制性能，采用了基于最小均方（LMS）的自适应滤波器，从转子位移信号中提取振动信号。本文提出了一种迭代搜索算法（ISA），以获得补偿电流与振动信号之间的对应关系。ISA 负责在线搜索 LMS 滤波器的补偿幅值和移相，使 AMB 控制器能够产生相应的补偿力来抑制振动。ISA 的结果被记录下来，以便在变速范围内使用查找表（LUT）抑制振动。在固定和变速范围内进行了全面的模拟和实验验证，结果表明，通过采用 ISA，基阶和其他谐阶的振动得到了有效抑制。
{"title":"Vibration Suppression for Active Magnetic Bearings Using Adaptive Filter with Iterative Search Algorithm","authors":"Jin-Hui Ye;Dan Shi;Yue-Sheng Qi;Jin-Hui Gao;Jian-Xin Shen","doi":"10.30941/CESTEMS.2024.00007","DOIUrl":"https://doi.org/10.30941/CESTEMS.2024.00007","url":null,"abstract":"Active Magnetic Bearing (AMB) is a kind of electromagnetic support that makes the rotor movement frictionless and can suppress rotor vibration by controlling the magnetic force. The most common approach to restrain the rotor vibration in AMBs is to adopt a notch filter or adaptive filter in the AMB controller. However, these methods cannot obtain the precise amplitude and phase of the compensation current. Thus, they are not so effective in terms of suppressing the vibrations of the fundamental and other harmonic orders over the whole speed range. To improve the vibration suppression performance of AMBs, an adaptive filter based on Least Mean Square (LMS) is applied to extract the vibration signals from the rotor displacement signal. An Iterative Search Algorithm (ISA) is proposed in this paper to obtain the corresponding relationship between the compensation current and vibration signals. The ISA is responsible for searching the compensating amplitude and shifting phase online for the LMS filter, enabling the AMB controller to generate the corresponding compensation force for vibration suppression. The results of ISA are recorded to suppress vibration using the Look-Up Table (LUT) in variable speed range. Comprehensive simulations and experimental validations are carried out in fixed and variable speed range, and the results demonstrate that by employing the ISA, vibrations of the fundamental and other harmonic orders are suppressed effectively.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"8 1","pages":"61-71"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10488439","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140342730","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}
{"title":"Content","authors":"","doi":"","DOIUrl":"https://doi.org/","url":null,"abstract":"","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"8 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10488435","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140342731","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}
Pub Date : 2024-03-01DOI: 10.30941/CESTEMS.2024.00006
G. Kovács
The harmonics that appear in the squirrel cage asynchronous machine have been discussed in great detail in the literature for a long time. However, the systematization of the phenomenon is still pending, so we made an attempt to fill this gap in the previous parts of our study by elaborating formulas for calculation of parasitic torques. It was a general demand among those who work in this field towards the author to verify his formulas with measurements. In the literature, it seems, only one detailed, purposeful series of measurements has been published so far, the purpose of which was to investigate the effect of the number of rotor slots on the torque-speed characteristic curve of the machine. The main goal of this study is to verify the correctness of the formulas by comparing them with the referred series of measurements. Relying on this, the expected synchronous parasitic torques were developed for the frequently used rotor slot numbers - as a design guide for the engineer. Thus, together with our complete table for radial magnetic pull published in our previous work, the designer has all the principles, data and formulas available for the right number of rotor slots for his given machine and for the drive system. This brings this series of papers to an end.
{"title":"Harmonics in the Squirrel Cage Induction Motor Analytic Calculation Part III: Influence on the Torque-speed Characteristic","authors":"G. Kovács","doi":"10.30941/CESTEMS.2024.00006","DOIUrl":"https://doi.org/10.30941/CESTEMS.2024.00006","url":null,"abstract":"The harmonics that appear in the squirrel cage asynchronous machine have been discussed in great detail in the literature for a long time. However, the systematization of the phenomenon is still pending, so we made an attempt to fill this gap in the previous parts of our study by elaborating formulas for calculation of parasitic torques. It was a general demand among those who work in this field towards the author to verify his formulas with measurements. In the literature, it seems, only one detailed, purposeful series of measurements has been published so far, the purpose of which was to investigate the effect of the number of rotor slots on the torque-speed characteristic curve of the machine. The main goal of this study is to verify the correctness of the formulas by comparing them with the referred series of measurements. Relying on this, the expected synchronous parasitic torques were developed for the frequently used rotor slot numbers - as a design guide for the engineer. Thus, together with our complete table for radial magnetic pull published in our previous work, the designer has all the principles, data and formulas available for the right number of rotor slots for his given machine and for the drive system. This brings this series of papers to an end.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"8 1","pages":"86-102"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10488426","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140342750","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}
In this paper, the electromagnetic performance of variable flux memory (VFM) machines with series-magnetic-circuit is investigated and compared for different rotor topologies. Based on a V-type VFM machine, five topologies with different interior permanent magnet (IPM) arrangements are evolved and optimized under same constrains. Based on two-dimensional (2-D) finite element (FE) method, their electromagnetic performance at magnetization and demagnetization states is evaluated. It reveals that the iron bridge and rotor lamination region between constant PM (CPM) and variable PM (VPM) play an important role in torque density and flux regulation (FR) capabilities. Besides, the global efficiency can be improved in VFM machines by adjusting magnetization state (MS) under different operating conditions.
本文研究并比较了不同转子拓扑结构的串联磁路可变磁通记忆（VFM）机器的电磁性能。以 V 型变磁通量记忆机为基础，在相同的约束条件下演化并优化了五种具有不同内部永磁体 (IPM) 布置的拓扑结构。基于二维（2-D）有限元（FE）方法，对它们在磁化和退磁状态下的电磁性能进行了评估。结果表明，恒定永磁发电机（CPM）和可变永磁发电机（VPM）之间的铁桥和转子叠片区域对转矩密度和磁通调节（FR）能力起着重要作用。此外，在不同的运行条件下，通过调整磁化状态（MS），可提高变频调速器的整体效率。
{"title":"Electromagnetic Performance Analysis of Variable Flux Memory Machines with Series-magnetic-circuit and Different Rotor Topologies","authors":"Qiang Wei;Z.Q. Zhu;Yan Jia;Jianghua Feng;Shuying Guo;Yifeng Li;Shouzhi Feng","doi":"10.30941/CESTEMS.2024.00012","DOIUrl":"https://doi.org/10.30941/CESTEMS.2024.00012","url":null,"abstract":"In this paper, the electromagnetic performance of variable flux memory (VFM) machines with series-magnetic-circuit is investigated and compared for different rotor topologies. Based on a V-type VFM machine, five topologies with different interior permanent magnet (IPM) arrangements are evolved and optimized under same constrains. Based on two-dimensional (2-D) finite element (FE) method, their electromagnetic performance at magnetization and demagnetization states is evaluated. It reveals that the iron bridge and rotor lamination region between constant PM (CPM) and variable PM (VPM) play an important role in torque density and flux regulation (FR) capabilities. Besides, the global efficiency can be improved in VFM machines by adjusting magnetization state (MS) under different operating conditions.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"8 1","pages":"3-11"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10488427","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140342667","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}
Pub Date : 2024-03-01DOI: 10.30941/CESTEMS.2024.00005
Ze-Zheng Wu;Robert Nilssen;Jian-Xin Shen
A versatile analytical method (VAM) for calculating the harmonic components of the magneto-motive force (MMF) generated by diverse armature windings in AC machines has been proposed, and the versatility of this method has been established in early literature. However, its practical applications and significance in advancing the analysis of AC machines need further elaboration. This paper aims to complement VAM by augmenting its theory, offering additional insights into its conclusions, as well as demonstrating its utility in assessing armature windings and its application of calculating torque for permanent magnet synchronous machines (PMSM). This work contributes to advancing the analysis of AC machines and underscores the potential for improved design and performance optimization.
{"title":"Utility and Application of a Versatile Analytical Method for MMF Calculation in AC Machines","authors":"Ze-Zheng Wu;Robert Nilssen;Jian-Xin Shen","doi":"10.30941/CESTEMS.2024.00005","DOIUrl":"https://doi.org/10.30941/CESTEMS.2024.00005","url":null,"abstract":"A versatile analytical method (VAM) for calculating the harmonic components of the magneto-motive force (MMF) generated by diverse armature windings in AC machines has been proposed, and the versatility of this method has been established in early literature. However, its practical applications and significance in advancing the analysis of AC machines need further elaboration. This paper aims to complement VAM by augmenting its theory, offering additional insights into its conclusions, as well as demonstrating its utility in assessing armature windings and its application of calculating torque for permanent magnet synchronous machines (PMSM). This work contributes to advancing the analysis of AC machines and underscores the potential for improved design and performance optimization.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"8 1","pages":"22-31"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10488428","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140342732","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}
Pub Date : 2024-03-01DOI: 10.30941/CESTEMS.2024.00010
Xiaoshuang Hui;Puqi Ning;Tao Fan;Yuhui Kang;Kai Wang;Yunhui Mei;Guangyin Lei
Silicon carbide (SiC) power modules play an essential role in the electric vehicle drive system. To improve their performance, reduce their size, and increase production efficiency, this paper proposes a multiple staked direct bonded copper (DBC) unit based power module packaging method to parallel more chips. This method utilizes mutual inductance cancellation effect to reduce parasitic inductance. Because the conduction area in the new package is doubled, the overall area of power module can be reduced. Entire power module is divided into smaller units to enhance manufacture yield, and improve design freedom. This paper provides a detailed design, analysis and fabrication procedure for the proposed package structure. Additionally, this paper offers several feasible solutions for the connection between power terminals and DBC untis. With the structure, 18 dies were paralleled for each phase-leg in a econodual size power module. Both simulation and double pulse test results demonstrate that, compared to conventional layouts, the proposed package method has 74.8% smaller parasitic inductance and 34.9% lower footprint.
{"title":"A Novel Multiple DBC-staked units Package to Parallel More Chips for SiC Power Module","authors":"Xiaoshuang Hui;Puqi Ning;Tao Fan;Yuhui Kang;Kai Wang;Yunhui Mei;Guangyin Lei","doi":"10.30941/CESTEMS.2024.00010","DOIUrl":"https://doi.org/10.30941/CESTEMS.2024.00010","url":null,"abstract":"Silicon carbide (SiC) power modules play an essential role in the electric vehicle drive system. To improve their performance, reduce their size, and increase production efficiency, this paper proposes a multiple staked direct bonded copper (DBC) unit based power module packaging method to parallel more chips. This method utilizes mutual inductance cancellation effect to reduce parasitic inductance. Because the conduction area in the new package is doubled, the overall area of power module can be reduced. Entire power module is divided into smaller units to enhance manufacture yield, and improve design freedom. This paper provides a detailed design, analysis and fabrication procedure for the proposed package structure. Additionally, this paper offers several feasible solutions for the connection between power terminals and DBC untis. With the structure, 18 dies were paralleled for each phase-leg in a econodual size power module. Both simulation and double pulse test results demonstrate that, compared to conventional layouts, the proposed package method has 74.8% smaller parasitic inductance and 34.9% lower footprint.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"8 1","pages":"72-79"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10488430","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140342751","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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