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2021 IEEE International Electric Machines & Drives Conference (IEMDC)最新文献

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Effects of WBG Devices in Medium-voltage Inverters on Induction Machine Stator Insulation 中压逆变器中WBG器件对感应电机定子绝缘的影响
Pub Date : 2021-05-17 DOI: 10.1109/IEMDC47953.2021.9449614
A. Mirza, H. Nguyen, A. Bazzi, Yang Cao
Wide bandgap (WBG) power semiconductor devices, such as SiC and GaN, have broadened the applications of motor drives in medium- and high-voltage regimes by pushing the limits of voltage, frequency, and power. These advantages of WBG inverters are being leveraged in aircraft and ship industries as they move towards next generation more- and all-electric designs. While the superiority of WBG technology in terms of faster switching, greater voltage breakdown strength, and short recovery time are known, its effect on the motor drive insulation is relatively unknown. This paper focuses on high-voltage high-frequency WBG inverters and analyses their effect on medium-voltage machine insulation. Specifically, analysis of dielectric stress and leakage current density is carried out on a 3-phase medium voltage motor's stator ground-wall insulation excited by a 2 level hex-bridge WBG inverter and a 3 level multilevel inverter in Ansys Maxwell and the results are presented.
宽带隙(WBG)功率半导体器件,如SiC和GaN,通过推动电压、频率和功率的限制,扩大了电机驱动在中高压环境中的应用。WBG逆变器的这些优势正被用于飞机和船舶行业,因为它们正朝着下一代多电动和全电动设计方向发展。虽然WBG技术在开关速度更快、电压击穿强度更高、恢复时间短等方面的优势是众所周知的,但它对电机驱动绝缘的影响却相对未知。本文以高压高频WBG逆变器为研究对象,分析了其对中压电机绝缘的影响。具体而言,在Ansys Maxwell软件中对2电平六桥WBG逆变器和3电平多电平逆变器励磁的三相中压电机定子地壁绝缘进行了介电应力和漏电流密度分析,并给出了分析结果。
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引用次数: 0
Sensorless Saliency Extraction using Quadratic-Regression-based Current Derivative Estimation 基于二次回归的电流导数估计的无传感器显著性提取
Pub Date : 2021-05-17 DOI: 10.1109/IEMDC47953.2021.9449558
E. R. Montero, M. Vogelsberger, W. Teppan, T. Wolbank
Stable field oriented control of induction machines in the proximity of zero electrical frequency relies on the extraction of machine saliencies for rotor flux/positon acquisition. To obtain such saliency information, voltage step excitation methods can be used. They excite the machine with a voltage step caused by the inverter and calculate the resulting phase current derivative, which contains several terms including the superposition of saliency components. Multiple strategies have been used to calculate the current derivative, such as FFT, neural networks, or linear regression. However, they do not take into account the influence of a curvature of the current response. This paper proposes using a least-square quadratic regression to calculate machine saliency information. In this sense, the linear response of the phase current can be accurately isolated from the inherent curvature. It will be proved by experimental measurements that the different saliencies' components are observed in both the second order and also first order term of the quadratic regression function. A performance comparison between linear regression and quadratic regression will be shown in terms of saliency acquisition.
感应电机在零频率附近的稳定磁场定向控制依赖于提取电机显著性以获取转子磁链/位置。为了获得这种显著性信息,可以使用电压阶跃激励方法。他们用逆变器引起的电压阶跃激励机器,并计算得到的相电流导数,其中包含几个项,包括显著分量的叠加。多种策略已被用于计算当前的导数,如FFT,神经网络,或线性回归。然而,它们没有考虑当前响应曲率的影响。本文提出用最小二乘二次回归计算机器显著性信息。从这个意义上说,相电流的线性响应可以准确地从固有曲率中分离出来。通过实验测量证明,在二次回归函数的二阶项和一阶项中都观察到不同的显著性成分。将在显著性获取方面对线性回归和二次回归进行性能比较。
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引用次数: 0
Dual Rotor Axial Flux Permanent Magnet Motor using PCB Stator 采用PCB定子的双转子轴向磁通永磁电机
Pub Date : 2021-05-17 DOI: 10.1109/IEMDC47953.2021.9449506
B. Anvari, Paulo Guedes-Pinto, Rich Lee
This paper presents a framework for the design and analysis of a light and low-cost axial flux permanent magnet motor which consists of dual permanent magnet rotors and a coreless Printed Circuit Board stator. Removal of the conventional laminated stator core significantly reduces core losses, decreases cogging and torque ripple and increases efficiency. The proposed design drastically eliminates magnetic forces between the rotor and the stator as well as the torque ripple, hence reduces the acoustic noise. A fully integrated variable frequency drive is proposed which uses high efficiency silicon carbide MOSFET inverter design. Using Printed Circuit Board stator enables simpler and faster manufacturing. An in-house analytical simulation has been used to model the motor design and evaluate the performance. The proposed design has been manufactured and was tested successfully. Finally, the test results are compared with the simulation results as well as finite element analysis.
本文提出了一种由双永磁转子和无芯印刷电路板定子组成的轻型低成本轴向磁通永磁电机的设计与分析框架。去除传统的层压定子铁心可以显著降低铁心损耗,减少齿槽和转矩波动,提高效率。该设计极大地消除了转子和定子之间的磁力以及转矩脉动,从而降低了噪声。提出了一种采用高效碳化硅MOSFET逆变器设计的全集成变频驱动器。使用印刷电路板定子使制造更简单,更快速。采用内部分析仿真对电机设计进行建模并对其性能进行评估。所提出的设计方案已经制造出来并成功地进行了测试。最后,将试验结果与仿真结果以及有限元分析结果进行了比较。
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引用次数: 9
Impact of Machine Parameters on The Design of High Specific Power Permanent Magnet Machines for Aerospace Applications 机械参数对航空航天用大功率永磁电机设计的影响
Pub Date : 2021-05-17 DOI: 10.1109/IEMDC47953.2021.9449592
A. Al-Qarni, A. El-Refaie, F. Wu
Aerospace applications demand high Specific Power (SP) electrical machines to enable hybrid/electric propulsion. The targets for SP are 2-3X the state-of-the art. Therefore, the adoption of novel technologies including advanced and lightweight materials, additively manufactured coils, as well as innovative and tight integration of Thermal Management System (TMS) to the machine and its Power Electronic Unit (PEU) are effective design methods to boost the electric drivetrain SP. This paper aims to use the foregoing techniques and perform a study to examine the impact of key design parameters on the machine SP.
航空航天应用需要高比功率(SP)的电机来实现混合动力/电力推进。SP的目标是最先进的2-3倍。因此,采用先进的轻量化材料、增材制造线圈以及热管理系统(TMS)与机器及其电力电子单元(PEU)的创新和紧密集成等新技术是提高电动传动系统SP的有效设计方法。本文旨在利用上述技术并进行研究,以检验关键设计参数对机器SP的影响。
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引用次数: 6
Fault-Tolerant Torque Control Based on Common and Differential Mode Modeling for Multi-Three-Phase Induction Machines 基于共模和差模建模的多三相异步电机容错转矩控制
Pub Date : 2021-05-17 DOI: 10.1109/IEMDC47953.2021.9449509
S. Rubino, E. Armando, R. Bojoi, L. Zarri
Among the multiphase solutions, multi-three-phase drives are experiencing significant industrial development since they can be configured as multiple three-phase units operating in parallel. The literature reports several control approaches to perform the torque regulation of multi-three-phase machines. Most of such solutions use the vector space decomposition (VSD) approach since it allows the control of a multi-three-phase machine using the conventional control schemes of three-phase drives, reducing the complexity of the control algorithm. However, this advantage is practically lost in the case of open-three-phase faults. Indeed, the post-fault operation of the VSD-based drive schemes requires the implementation of additional control modules, often specifically designed for the machine under consideration. Therefore, this paper aims at proposing a novel control approach that allows using any control scheme developed for three-phase motors to perform the torque regulation of a multi-three-phase machine both in healthy and faulty operation. In this way, the previously mentioned drawbacks of the VSD-based control schemes in dealing with the machine's faulty operation are avoided. Moreover, the simplicity of the control algorithm is always preserved regardless of the machine operating condition. The proposed solution has been experimentally validated through a 12-phase induction motor, rated 10 kW at 6000 r/min, which uses a quadruple-three-phase configuration of the stator winding.
在多相解决方案中,多三相驱动器由于可以配置为并联运行的多个三相单元,因此正在经历重大的工业发展。文献报道了几种控制方法来执行多三相电机的转矩调节。大多数此类解决方案使用向量空间分解(VSD)方法,因为它允许使用三相驱动器的传统控制方案控制多三相机器,从而降低了控制算法的复杂性。然而,这一优势实际上在开三相故障的情况下就失去了。实际上,基于vsd的驱动方案的故障后操作需要实施额外的控制模块,这些模块通常是专门为正在考虑的机器设计的。因此,本文旨在提出一种新的控制方法,允许使用三相电机开发的任何控制方案来执行多三相电机在健康和故障运行中的转矩调节。这样就避免了前面提到的基于vsd的控制方案在处理机器故障操作时的缺点。此外,无论机器运行状况如何,控制算法始终保持简单性。所提出的解决方案已通过12相感应电机进行了实验验证,该电机额定功率为10kw,转速为6000 r/min,采用四三相定子绕组配置。
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引用次数: 1
Design and Optimization of a Low-Torque-Ripple High-Torque-Density Vernier Machine Using Ferrite Magnets for Low-Speed Direct-Drive Applications 用于低速直接驱动的低转矩脉动高转矩密度游标机的设计与优化
Pub Date : 2021-05-17 DOI: 10.1109/IEMDC47953.2021.9449586
Cheng Gong, Fang Deng
In recent years, Vernier permanent magnet machines (VPMs) have gained much interest in academia. However, due to the large leakage flux, the power factor of Vernier machines is too low to be applied in real industry. In this paper, a novel split-tooth, concentrated-winding Vernier machine using ferrite magnets is proposed for high-torque, low-speed direct drive applications in home appliance industry. It uses consequent-pole magnets in the rotor, as well as additional assistant magnets in the stator teeth, in order to reduce the leakage flux and boost the torque density. A systematic way of reducing the torque ripple from 40% to 4% is proposed by carefully choosing the right combination of stator/rotor pole pair numbers. A comprehensive design optimization is conducted to achieve the optimal performance. The magnets in the stator are shaped on both corners to reduce the saturation level. The key findings during the optimization are described in detail. Finally the total number of turns per phase is carefully reduced to meet the torque, saturation, power factor and space requirements. The test results of a prototyped machine show that the proposed design can achieve 34% more torque and 20% less loss with a reasonable power factor of 0.63, compared with an optimized PM synchronous machine under the same volume. It is found that the significant torque boost is attributed to the multiple working harmonics of the air gap flux density.
近年来,游标永磁电机引起了学术界的广泛关注。然而,由于泄漏磁通大,游标机的功率因数太低,无法在实际工业中应用。本文提出了一种适用于家电行业大转矩、低速直接驱动的铁氧体磁体分齿集中卷绕游标机。它在转子中使用顺极磁铁,以及在定子齿中使用额外的辅助磁铁,以减少泄漏磁通并提高扭矩密度。通过选择正确的定子/转子极对组合,提出了将转矩脉动从40%降低到4%的系统方法。为了达到最佳性能,进行了全面的设计优化。定子中的磁铁在两个角上都有形状,以降低饱和水平。详细描述了优化过程中的关键发现。最后,每相的总匝数仔细减少,以满足扭矩,饱和,功率因数和空间要求。样机的试验结果表明,与优化后的永磁同步电机相比,在相同体积下,在合理的功率因数为0.63的情况下,所设计的永磁同步电机的转矩增加34%,损耗减少20%。结果表明,显著的转矩提升是由于气隙磁通密度的多重工作谐波引起的。
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引用次数: 2
Assessment of Overmodulation Strategies for AC Drives Considering Harmonics Content and Switching Losses 考虑谐波含量和开关损耗的交流变频器过调制策略评估
Pub Date : 2021-05-17 DOI: 10.1109/IEMDC47953.2021.9449543
A. Abouzeid, J. Guerrero, A. Endemaño, Iker Muniategui, David Ortega, F. Briz
This paper performs a comparative analysis of overmodulation methods for AC electric drives. Criteria for the analysis considers three aspects: output vs. commanded modulation index (i.e., linearity); harmonic content; and the number of commutations (i.e., switching losses). The analysis focuses on existing methods reported in the literature. Improvements for the existing methods will be proposed as a result of the analysis. The analysis is experimentally validated on a three-phase three-level Neutral-Point-Clamped (NPC) inverter.
本文对交流电力传动的过调制方法进行了比较分析。分析标准考虑三个方面:输出与指令调制指数(即线性度);谐波内容;以及换流次数(即开关损耗)。分析的重点是文献中报道的现有方法。分析结果将提出对现有方法的改进。在三相三电平中点箝位(NPC)逆变器上进行了实验验证。
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引用次数: 2
Commissioning of Induction Motors Larger than 250hp What is Motor Commissioning and Why is it Important? 什么是电机调试?为什么电机调试很重要?
Pub Date : 2021-05-17 DOI: 10.1109/IEMDC47953.2021.9449568
H. de Swardt
It is commonly believed that if a motor surpasses the infant failure state trouble free, it will probably provide several years of reliable service. Traditional installation services unfortunately frequently do not identify and correct common causes of such infant failures, resulting in costly unplanned downtime shortly after a plant start-up. This paper proposes an approach to motor commissioning that aims to identify infant failure even before the plant is returned to service, thereby avoiding these costly productions losses, and providing opportunity for real time plant improvements and optimization.
人们普遍认为,如果一个电机超过婴儿故障状态无故障,它可能会提供几年的可靠服务。不幸的是,传统的安装服务经常不能识别和纠正这些初级故障的常见原因,导致工厂启动后不久就出现了昂贵的计划外停机时间。本文提出了一种电机调试方法,旨在在工厂恢复服务之前识别婴儿故障,从而避免这些昂贵的生产损失,并为实时工厂改进和优化提供机会。
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引用次数: 0
Suppression of Torque Ripple for Consequent Pole PM Machine by Asymmetric Pole Shaping Method 非对称极点成形法抑制顺极永磁电机转矩脉动
Pub Date : 2021-05-17 DOI: 10.1109/IEMDC47953.2021.9449524
J. Qi, Z.Q. Zhu, L. Yan, G. Jewell, C. Gan, Y. Ren, S. Brockway, C. Hilton
Consequent pole (CP) permanent magnet (PM) machines have attracted considerable interest as a means of reducing machine cost through a marked reduction in the volume of permanent magnet required to meet a particular torque specification. However, the presence of a large torque ripple that can result from the CPPM structure can hinder their adoption in some applications, especially for the dominant third order torque ripple. Although several design-specific modifications have been proposed to ameliorate torque ripple, arguably the generalized principles underpinning this behavior have not been fully established. In this paper, it will be illustrated that an aggregation of the fluctuations in inductance, back EMF and cogging torque contributes to increased torque ripple. Meanwhile, an asymmetric pole shaping method is proposed to reduce the torque ripple, taking the dominant third order torque ripple as example. Simulated results of the 12-slot/8-pole prototypes show that compared to symmetrical pole shaping model and the plain pole model, the proposed asymmetric shaping method is effective in reducing torque ripple.
顺向极(CP)永磁(PM)电机作为一种通过显著减少满足特定转矩规格所需的永磁体体积来降低机器成本的手段,引起了相当大的兴趣。然而,CPPM结构产生的大扭矩脉动可能会阻碍它们在某些应用中的应用,特别是对于占主导地位的三阶扭矩脉动。虽然已经提出了一些特定的设计修改来改善转矩脉动,但可以论证的是,支持这种行为的广义原理尚未完全建立。在本文中,将说明电感,反电动势和齿槽转矩波动的聚集有助于增加转矩脉动。同时,以占主导地位的三阶转矩脉动为例,提出了一种非对称极点整形方法来减小转矩脉动。12槽/8极样机的仿真结果表明,与对称极形模型和平面极形模型相比,所提出的非对称极形方法能有效地减小转矩脉动。
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引用次数: 6
Superconductivity and its Application in the Field of Electrical Machines 超导及其在电机领域的应用
Pub Date : 2021-05-17 DOI: 10.1109/IEMDC47953.2021.9449545
M. Biasion, J. Fernandes, S. Vaschetto, A. Cavagnino, A. Tenconi
This paper provides a review on the most recent applications of superconductors in rotating electrical machines. The main types of superconductors for the present-day electrical applications are shown to highlight their main features. The main characteristics of superconducting synchronous machines, DC machines and induction machines for marine and vehicle propulsion, future electric aircraft, wind energy and industrial applications are discussed by presenting data of prototypes and demonstrators. The paper aims to raise awareness among researchers and engineers on the importance of superconductivity to enhance the performance of conventional electrical machines.
本文综述了超导体在旋转电机中的最新应用。超导体的主要类型为当今电气应用显示突出其主要特点。通过展示样机和演示数据,讨论了用于船舶和车辆推进、未来电动飞机、风能和工业应用的超导同步电机、直流电机和感应电机的主要特点。本文旨在提高研究人员和工程师对超导性对提高传统电机性能的重要性的认识。
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引用次数: 5
期刊
2021 IEEE International Electric Machines & Drives Conference (IEMDC)
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