Download or read book Design and Analysis of Sculpted Rotor Interior Permanent Magnet Machines written by Steven Lee Hayslett and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design of interior permanent magnet electrical machines is complex. Interior permanent magnet machines offer a good balance of cost, efficiency, and torque/power density. Maximum torque and power production of an interior permanent magnet machine is achieved through balancing design choices related to the permanent magnet and salient features. The embedded magnet within the salient structure of the rotor lamination results in an increase in harmonic content. In addition, interaction of the armature, control angle, and rotor reluctance structure creates additional harmonic content. These harmonics result in increased torque ripple, radial forces, losses, and other unwanted phenomena. Further improvements in torque and power density, and techniques to minimize harmonics, are necessary. Typical interior permanent magnet machine design results at the maximum torque per amp condition are at neither the maximum magnet nor maximum salient torque, but at the best combination of the two. The use of rotor surface features to align the magnet and the reluctance axis allows for improvement of torque and power density. Reduction of flux and torque harmonics is also possible through careful design of rotor sculpt features that are included at or near the surface of the rotor. Finite element models provide high fidelity and accurate results to machine performance but do not give insight into the relationship between design parameters and performance. Winding factor models describe the machine with a set of Fourier series equations, providing access to the harmonic information of both parameters and performance. Direct knowledge of this information provides better insight, a clear understanding of interactions, and the ability to develop a more efficient design process. A new analytical winding function model of the single-V IPM machine is introduced, which considers the sculpted rotor and how this model can be used in the design approach of machines.Rotor feature trends are established and utilized to increase design intuition and reduce dependency upon the lengthy design of experiment optimization processes. The shape and placement of the rotor features, derived from the optimization process, show the improvement in torque average and torque ripple of the IPM machine.
Download or read book Limits Modeling and Design of High Speed Permanent Magnet Machines written by Aleksandar Borisavljevic and published by Springer Science & Business Media. This book was released on 2012-10-31 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a growing number of applications that require fast-rotating machines; motivation for this thesis comes from a project in which downsized spindles for micro-machining have been researched. The thesis focuses on analysis and design of high-speed PM machines and uses a practical design of a high-speed spindle drive as a test case. Phenomena, both mechanical and electromagnetic, that take precedence in high-speed permanent magnet machines are identified and systematized. The thesis identifies inherent speed limits of permanent magnet machines and correlates those limits with the basic parameters of the machines. The analytical expression of the limiting quantities does not only impose solid constraints on the machine design, but also creates the way for design optimization leading to the maximum mechanical and/or electromagnetic utilization of the machine. The models and electric-drive concepts developed in the thesis are evaluated in a practical setup.
Download or read book Advanced Theory of Fractional Slot Concentrated Wound Permanent Magnet Synchronous Machines written by Mohammad Farshadnia and published by Springer. This book was released on 2018-03-27 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the analytical modeling of fractional-slot concentrated-wound (FSCW) interior permanent magnet (IPM) machines and establishes a basis for their magnetic and electrical analysis. Aiming at the precise modeling of FSCW IPM machines’ magnetic and electrical characteristics, it presents a comprehensive mathematical treatment of the stator magneto-motive force (MMF), the IPM rotor non-homogeneous magnetic saturation, and its airgap flux density. The FSCW stator spatial MMF harmonics are analytically formulated, providing a basis on which a novel heuristic algorithm is then proposed for the design of optimal winding layouts for multiphase FSCW stators with different slot/pole combinations. In turn, the proposed mathematical models for the FSCW stator and the IPM rotor are combined to derive detailed mathematical expressions of its operational inductances, electromagnetic torque, torque ripple and their respective subcomponents, as a function of the machine geometry and design parameters. Lastly, the proposed theories and analytical models are validated using finite element analysis and experimental tests on a prototype FSCW IPM machine.
Download or read book Third Harmonic Utilization in Permanent Magnet Machines written by Kai Wang and published by Springer. This book was released on 2018-08-29 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book investigates the utilization of harmonics in the permanent magnet (PM) or rotor shape to improve the torque density of PM brushless AC machines including three-phase inner rotor and outer rotor machines, five-phase machines, dual three-phase machines, linear machines, by means of analytical, finite element analyses, and as well as experimental validation. The torque density can be improved while the torque ripple remains low in PM shaping utilizing the 3rd harmonic. In this book, the analytical expression of output torque is derived for PM machines with rotor shape using the 3rd harmonic, and then the optimal 3rd harmonic for maximizing torque is analytically obtained. The book compares the PM shape in surface-mounted PM (SPM) machines and the rotor lamination shape in interior PM (IPM) machines utilizing the 3rd harmonic, and it becomes clear that their shaping methods and amount of torque improvement are different. In a five-phase PM machine, the 3rd harmonic can be utilized in both the current waveform and PM shapes to further improve the output torque. For the dual three-phase SPM machines without deteriorating the torque more than 30% when the optimal 3rd harmonic into both the current and PM shape are injected. The harmonics in airgap flux density have significant influence on the cogging torque, stator iron flux distribution, and radial force between the rotor and stator. These effects has been investigated as well in this book.
Download or read book Impact of Interior Permanent Magnet Rotor Design on Operation Range of a Synchronous Machine written by Pavel Ogrizek and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Analysis of Interior Permanent Magnet Synchronous Machines for Electric Vehicles written by Massimo Barcaro and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Analysis of Permanent Magnet Machines with Special Reference to Synchronous Generator written by Hesamuddin Ahmad and published by . This book was released on 1968 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Novel Asymmetric Rotor Pole Interior Permanent Magnet Machines written by Yang Xiao and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Operation of Permanent Magnet Machine for Integrated Starter generator Application in Series Hybrid Bus written by Sinisa Jurkovic and published by . This book was released on 2009 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On Modeling and Design of Fractional slot Concentrated winding Interior Permanent Magnet Machines written by Jagadeesh K. Tangudu and published by . This book was released on 2011 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Rules for Permanent Magnet Synchronous Machine with Tooth Coil Winding Arrangement written by Ahamed Bilal Asaf Ali and published by Cuvillier Verlag. This book was released on 2014-08-14 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the generic rules for permanent magnet synchronous machine (PMSM) with tooth coil winding arrangement. The generic rules concentrates on minimized cogging torque and torque ripple. The geometries considered in this thesis are two different tooth coil winding arrangements and three different rotor types to formulate the design rules. The occurrence of parasitic torque in the PMSM is classified from the origin of harmonic sources. The cogging torque and torque ripple are derived analytically using the stator current sheet distribution, the rotor field distribution and the permeance functions. The detailed torque analysis are performed in Finite Element Method (FEM) for different slot opening and magnet pole coverage. The 2D harmonics analysis approach is used to predict the sources of the harmonics. The torque is reconstructed from the selected harmonics combinations and are compared with the pulsating torque obtained directly from the FEM. The harmonic sources of pulsating torque are also validated with prototype for a geometry. The investigations on pulsating torque are extended to other operating points such as field weakening and half load condition. Finally, the generic design rules are suggested for PMSM with tooth coil winding arrangement. In addition, simplified design rules to have quick design approach and design guidelines from manufacturing point of view are suggested.
Download or read book Electromagnetic Linear Machines with Dual Halbach Array written by Liang Yan and published by Springer. This book was released on 2016-09-15 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book extends the conventional two-dimensional (2D) magnet arrangement into 3D pattern for permanent magnet linear machines for the first time, and proposes a novel dual Halbach array. It can not only effectively increase the radial component of magnetic flux density and output force of tubular linear machines, but also significantly reduce the axial flux density, radial force and thus system vibrations and noises. The book is also the first to address the fundamentals and provide a summary of conventional arrays, as well as novel concepts for PM pole design in electric linear machines. It covers theoretical study, numerical simulation, design optimization and experimental works systematically. The design concept and analytical approaches can be implemented to other linear and rotary machines with similar structures. The book will be of interest to academics, researchers, R&D engineers and graduate students in electronic engineering and mechanical engineering who wish to learn the core principles, methods, and applications of linear and rotary machines.
Download or read book Design and Analysis of Dual rotor Radial flux Toroidally wound Surface mounted PM Machines written by Ronghai Qu and published by . This book was released on 2002 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the High Torque Density Vernier Permanent Magnet Machines Utilizing an Alternating Rotor Leakage Flux Blocking Design written by Wenbo Liu and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates Vernier permanent magnet (PM) machines utilizing a new alternating rotor leakage flux blocking design for low speed high torque direct drive systems, such as industrial cooling fans and wind turbines. The innovation can be applied to a family of PM machines with various rotor structures such as: spoke type, V-shape. The proposed topology utilizes only a single stator and rotor and has much higher torque density compared to a normal design. Low remanence material (such as ferrite magnets) can be used due to the flux focusing effect enabled by the adoption of spoke type structure. The proposed structure is simpler compared to competitive double excitation or double rotor designs. The structure not only brings down the manufacturing complexity but also improves the machine mechanical integrity. In addition, it bridges the gap between academic research and the possibility of industry adoption. Due to the Vernier machine's short development history and peculiar features, researchers have reached various conclusions through different interpretations, many of which have limited physical insight. Thus, this work targets on developing a systematic analysis for the working mechanisms for Vernier PM machines, starting with derivations of generic single layer winding function and airgap originated flux modulation effects, upon which closed-form expressions for back-EMF induction and torque production are also developed. The analytical models are built and compared for both conventional synchronous machine and Vernier PM machine, through which the Vernier PM machine is identified as a synchronous machine utilizing flux modulation effects. Some key design parameters for Vernier PM machine are identified in the model, by associating them to terms such as gearing coefficient and equivalent winding factor, a true physics-based model is established which can be readily merged with the existing machine design knowledge. Furthermore, an optimum design space is located through analytical model based parametric study and verified by finite element analysis (FEA). Prototype machines are designed and built for V-shape structure using rare earth magnet, the prototype machines are characterized in the experiment, and the results of which are in good agreement with FEA predications and analytical model. The experimental results have demonstrated that the V-shape Vernier PM machine achieved a good balance between performance, cost and manufacturing complexity, the design is suitable for low speed high torque direct drive application.
Download or read book On Design and Analysis of Synchronous Permanent Magnet Machines for Field weakening Operation in Hybrid Electric Vehicles written by Freddy Magnussen and published by . This book was released on 2004 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Synthesis and Optimization of Permanent Magnet Synchronous Machines Based on Computationally Efficient Finite Element Analysis written by Gennadi Sizov and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, a model-based multi-objective optimal design of permanent magnet ac machines, supplied by sine-wave current regulated drives, is developed and implemented. The design procedure uses an efficient electromagnetic finite element-based solver to accurately model nonlinear material properties and complex geometric shapes associated with magnetic circuit design. Application of an electromagnetic finite element-based solver allows for accurate computation in intricate performance parameters and characteristics. The first contribution of this dissertation is the development of a rapid computational method that allows accurate and efficient exploration of large multi-dimensional design spaces in search of optimum design(s). The computationally efficient finite element-based approach developed in this work provides a framework of tools that allow rapid analysis of synchronous electric machines operating under steady-state conditions. In the developed modeling approach, major steady-state performance parameters such as, winding flux linkages and voltages, average, cogging and ripple torques, stator core flux densities, core losses, efficiencies and saturated machine winding inductances, are calculated with minimum computational effort. In addition, the method includes means for rapid estimation of distributed stator forces and three-dimensional effects of stator and/or rotor skew on the performance of the machine. The second contribution of this dissertation is the development of the design synthesis and optimization method based on a differential evolution algorithm. The approach relies on the developed finite element-based modeling method for electromagnetic analysis and is able to tackle large-scale multi-objective design problems using modest computational resources. Overall, computational time savings of up to two orders of magnitude are achievable, when compared to current and prevalent state-of-the-art methods. These computational savings allow one to expand the optimization problem to achieve more complex and comprehensive design objectives. The method is used in the design process of several interior permanent magnet industrial motors. The presented case studies demonstrate that the developed finite element-based approach practically eliminates the need for using less accurate analytical and lumped parameter equivalent circuit models for electric machine design optimization. The design process and experimental validation of the case-study machines are detailed in the dissertation.
Download or read book Electromagnetic Design Optimization of V shaped Magnet IPM Synchronous Machines written by Buddhika De Silva Guruwatta Vidanalage and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents an electromagnetic design optimization for the V-shaped magnet Interior Permanent Magnet Synchronous Machines (IPMSMs) and conducts a comparative study on the predicted operating characteristics of the optimally designed machines. A local optimizer (nonlinear Simplex Algorithms), a global optimizer (Genetic Algorithms) and a newly developed algorithm for multimodal design optimization are separately introduced and used to determine the dimensions of each optimized machine based on three distinctive Objective Functions. The conducted comparative study enables one to have more degrees of freedom in selecting a final design among the presented optimized designs by evaluating the performances of each machine. A prototype of the optimized machine is fabricated, and the output power, losses, and efficiency of the built machine are assessed using experimental analysis. The experimental results for the optimized IPMSM design verify the accuracy, reliability, and effectiveness of the optimization approach and simulation analysis.
