Download or read book Torque Characterization of Permanent Magnet and Synchronous Reluctance Machines written by Chirag Desai and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The characterization of an electric machine can be evaluated using different available machine design and analysis softwares prior to manufacturing. These machine design softwares are either Finite Element Analysis (FEA) based or analytical model based. Each design software formulates and solves the machine design problem differently. Therefore, there is always a discrepancy in the results obtained from each of these softwares. The expertise of the user also affects the outcome of the analysis. Moreover, the desired performance of a machine is highly influenced by the manufacturing and assembly process of its various components. Hence, it is extremely important to characterize the design and performance of a special machine in different machine design softwares before and after fabrication. To validate the design methodologies, the accuracy of FEA softwares, machine models, as well as the manufacturing and assembly process, a comparative analysis should be performed between the results obtained from the software and experimental characterizations. In this thesis, the characterization of a variable-flux permanent magnet machine, synchronous reluctance machines (SynRMs), and a novel interior permanent magnet synchronous machine (PMSM) with improved torque utilization, is presented. Three different machine design softwares, namely MotorSolve, MagNet, and MagneForce are used to characterize the machines. This thesis initially presents the characterization of a 7.5 hp variable-flux permanent magnet machine. The back emf, magnet flux linkage, torque-angle, and core loss characterization is carried out for this machine. An error band is introduced for the experimental torque-angle curves. This error band contains the tolerance and resolution of the torque transducer and conditioner. Additionally, an analytical model is implemented to estimate the core losses in the prototyped variable-flux PM machine. The results obtained from software and experimental characterizations show an acceptable agreement. A comprehensive manufacturing and assembly process of the SynRMs for rapid prototyping is also presented in this thesis. The application of nonconventional photochemical machining process to produce the SynRM laminations is described. In addition, various stages of manufacturing, stator and rotor assembly techniques, rotor balancing procedure as well as specialized components used at various stages of the process are also presented. To validate the accuracy of the design and fabrication, the characterization of three SynRMs is then performed. This consists of static torque-angle characterization, inductance characterization, and dynamic characterization. An error band is also included for the experimental torque-angle curves. A regenerative dynamometer test system is developed to perform various static and dynamic characterizations. This test setup is equipped with a real-time supervisory controller as well as measurement and monitoring instruments. Finally, a novel interior PMSM topology with improved torque utilization to reduce magnet volume is characterized. The no-load back emf and static torque-angle are simulated and measured. A search coil based advance instrumentation system to monitor the machine's parameters is discussed. The design, manufacturing, and implementation of the search coils to measure flux density in the stator of the novel interior PMSM are also discussed. For every characterization, a comparative analysis is performed to validate the design methodologies, accuracy of FEA softwares, machine models, manufacturing, and assembly process.

Download or read book The Rediscovery of Synchronous Reluctance and Ferrite Permanent Magnet Motors written by Gianmario Pellegrino and published by Springer. This book was released on 2016-04-28 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers an essential compendium on the analysis and design of synchronous motors for variable-speed applications. Focusing on synchronous reluctance and ferrite permanent-magnet (PM) synchronous reluctance machines, it provides a broad perspective on three-phase machines for variable speed applications, a field currently dominated by asynchronous machines and rare-earth PM synchronous machines. It also describes synchronous reluctance machines and PM machines without rare-earth materials, comparing them to state-of-the-art solutions. The book provides readers with extensive information on and finite element models of PM synchronous machines, including all relevant equations and with an emphasis on synchronous-reluctance and PM-assisted synchronous-reluctance machines. It covers ferrite-assisted machines, modeled as a subcase of PM-assistance, fractional slot combinations solutions, and a quantitative, normalized comparison of torque capability with benchmark PM machines. The book discusses a wealth of techniques for identifying machine parameters, with an emphasis on self-commissioning algorithms, and presents methods for automated machine design and optimization, including a software tool developed for this purpose. Addressing an important gap in the field of PM-less and less-PM electrical machines, it is intended as a self-contained reference guide for both graduate students and professional machine designers, and as a useful text for university courses on automated and/or optimized design of electrical machines and drives.

Download or read book Permanent Magnet Reluctance Self Synchronous Motors written by Syed A. Nasar and published by Springer. This book was released on 1993-03-17 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Permanent Magnet, Reluctance, and Self-Synchronous Motors discusses the theory, design, and control of permanent magnet materials. The book describes permanent magnets and their applications to electric machines as well as their performance characteristics and limitations. It presents the performance and calculations of PM commutator motors and an approach to their design. Permanent magnet synchronous motors, finite-element calculations, design methodologies, and rectangular and sinusoidal current control are discussed. It presents reluctance motors, their topologies and performance analyses as well as reluctance synchronous motors, with very large rotor saliency ratios, and their vector control. Numerical examples and data of practical interest are provided throughout the book. The book will be very useful to engineers involved in the design and manufacturing of permanent magnet and reluctance motors and high-performance drives, as well as electrical engineering students and educators.

Download or read book Permanent Magnet Synchronous Machines written by Sandra Eriksson and published by MDPI. This book was released on 2019-08-20 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interest in permanent magnet synchronous machines (PMSMs) is continuously increasing worldwide, especially with the increased use of renewable energy and the electrification of transports. This book contains the successful submissions of fifteen papers to a Special Issue of Energies on the subject area of “Permanent Magnet Synchronous Machines”. The focus is on permanent magnet synchronous machines and the electrical systems they are connected to. The presented work represents a wide range of areas. Studies of control systems, both for permanent magnet synchronous machines and for brushless DC motors, are presented and experimentally verified. Design studies of generators for wind power, wave power and hydro power are presented. Finite element method simulations and analytical design methods are used. The presented studies represent several of the different research fields on permanent magnet machines and electric drives.

Download or read book Optimal Design and Comparative Analysis of Multi Phase Permanent Magnet Assisted Synchronous Reluctance Machines written by Sai Sudheer Reddy Bonthu and published by . This book was released on 2015 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: PMa-SynRMs are similar to interior permanent magnet (IPM) motors in structure but are more economical due to reduced permanent magnets. This thesis presents an optimal design of five-phase permanent magnet assisted synchronous reluctance motor (PMa-SynRM) for low torque ripple applications and its comparison with a three-phase PMa-SynRM. The research on the five-phase PMa-SynRM has been expanded to develop a 15kW integrated starter generator (ISG). In this study, the design of five-phase permanent magnet assisted synchronous reluctance motor (PMa-SynRM) for low torque ripple. PMa-SynRMs are similar to interior permanent magnet (IPM) motors in structure but are more economical due to reduced permanent magnets. In this study, lumped parameter model (LPM) is used in the approach to initially design the five-phase PMa-SynRM. Numerical equations are integrated with the LPM to design the machine with its given range of design parameter values. Thousands of designs are generated by LPM, which are then converged to optimized model using differential evolution strategy (DES). Optimization is done with maximum efficiency and minimum torque ripple as objective. The optimized 3 kW five-phase PMa-SynRM is then analyzed by finite element method (FEM) for fine tuning. Simulation results for back electromotive force (EMF), flux linkage, developed torque, torque ripple, cogging torque, torque speed characteristics and necessary motor parameters such as d and q-axis inductances variation over respective axis currents are verified by fabricated prototype. In addition, comparison of three-phase and five-phase permanent magnet assisted synchronous reluctance motors (PMa-SynRM) in terms of their design and performance characteristics is presented. With higher fault tolerant capability, efficiency, and reliability, the five-phase PMa-SynRM can be a better substitute when compared to the three-phase PMa-SynRM in critical applications where safety is top priority. In this study, for a fair comparison, same design procedure using LPM is followed in developing the three-phase and five-phase PMa-SynRMs. Performance characteristics such as torque pulsation, back-EMF, flux linkage, etc. are intensively simulated through FEM. The optimized three-phase and five-phase PMa-SynRMs are fabricated with the same power rating (3kW) and same volume. Experimental tests are conducted on the prototypes to validate the simulation results. A 15kW five-phase PMa-SynRM integrated starter generator (ISG) has been proposed in this study. Initial model in LPM and procedure to be followed to develop the final optimized model with DES optimizer has been presented.

Download or read book Energy Efficiency in Motor Driven Systems written by Francesco Parasiliti and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports the state of the art of energy-efficient electrical motor driven system technologies, which can be used now and in the near future to achieve significant and cost-effective energy savings. It includes the recent developments in advanced electrical motor end-use devices (pumps, fans and compressors) by some of the largest manufacturers. Policies and programs to promote the large scale penetration of energy-efficient technologies and the market transformation are featured in the book, describing the experiences carried out in different parts of the world. This extensive coverage includes contributions from relevant institutions in the Europe, North America, Latin America, Africa, Asia, Australia and New Zealand.

Download or read book Synchronous Reluctance Machines written by Nicola Bianchi and published by IET. This book was released on 2021-12-21 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: The comprehensive reference on synchronous reluctance machines, which offer high power density at low cost and support the electrification in the transport sector. This book, written by top academic and industry experts, covers all topics required to design these machines.

Download or read book Direct torque control of permanent magnet synchronous machines written by Julius Luukko and published by . This book was released on 2000 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Torque Analysis of an Interior Permanent Magnet Synchronous Motor written by Suchit Reddy Damugatla and published by . This book was released on 2005 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Torque speed Characteristics of Induction Machine and Hybrid Permanent Magnet Assisted Synchronous Reluctance Machine for Electric Vehicle Application written by Hiroshi Seki and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Torque speed Characteristics of Induction Machine and Hybrid Permanent Magnet Assisted Synchronous Reluctance Machine for Electric Vehicle Application written by Yang Guan and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design Analysis of Line start Interior Permanent Magnet Synchronous Motor written by Hossan Mohammad Zubayer and published by . This book was released on 2011 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development and Analysis of Interior Permanent Magnet Synchronous Motor with Field Excitation Structure written by Seong Taek Lee and published by . This book was released on 2009 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout the years Hybrid Electric Vehicles (HEV) require an electric motor which has high power density, high efficiency, and wide constant power operating region as well as low manufacturing cost. For these purposes, a new Interior Permanent Magnet Synchronous Motor (IPMSM) with brushless field excitation (BFE) is designed and analyzed. This unique BFE structure is devised to control the amount of the air-gap flux for the purpose of achieving higher torque by increasing the air-gap flux at low speed and wider operating speed range by weakening the flux at high speed. On the process of developing the new IPMSM, the following analysis results are presented. Firstly, a new analytical method of output torque calculations for IPMSM is shown. This method works well when using a 2-dimensional magnetic equivalent circuit of a machine by omitting the step of calculating the inductance values which are required for the calculation of the reluctance torque. Secondly, there is a research about the slanted air-gap shape. This structure is intended to maximize the ratio of the back-emf of a machine that is controllable by BFE as well as increase the output torque. The study of various slanted air-gap shapes suggests a new method to increase torque density of IPMSM. Lastly, the conventional two-axis IPMSM model is modified to include the cross saturation effect by adding the cross-coupled inductance terms for calculating the power factor and output torque in comparing different saturated conditions. The results suggest that the effect of cross-coupled inductance is increase when d-axis current is high on the negative direction.

Download or read book Electromechanical Motion Devices written by Paul C. Krause and published by John Wiley & Sons. This book was released on 2012-08-10 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text provides a basic treatment of modern electric machine analysis that gives readers the necessary background for comprehending the traditional applications and operating characteristics of electric machines—as well as their emerging applications in modern power systems and electric drives, such as those used in hybrid and electric vehicles. Through the appropriate use of reference frame theory, Electromagnetic Motion Devices, Second Edition introduces readers to field-oriented control of induction machines, constant-torque, and constant-power control of dc, permanent-magnet ac machines, and brushless dc machines. It also discusses steady-state and transient performance in addition to their applications. Electromagnetic Motion Devices, Second Edition presents: The derivations of all machine models, starting with a common first-principle approach (based upon Ohm's, Faraday's, Ampere's, and Newton's/Euler's laws) A generalized two-phase approach to reference frame theory that can be applied to the ac machines featured in the book The influences of the current and voltage constraints in the torque-versus-speed profile of electric machines operated with an electric drive Complete with slides, videos, animations, problems & solutions Thoroughly classroom tested and complete with a supplementary solutions manual and video library, Electromagnetic Motion Devices, Second Edition is an invaluable book for anyone interested in modern machine theory and applications. If you would like access to the solutions manual and video library, please send an email to: [email protected].

Download or read book Design and Performance Analysis of Rare Earth Free Five Phase Permanent Magnet Assisted Synchronous Reluctance Motor written by Md. Zakirul Islam and published by . This book was released on 2019 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents the design and performance analysis of five-phase ferrite permanent magnet assisted synchronous reluctance motor (Fe-PMaSynRM). The risk of irreversible demagnetization and mechanical deformation are two major challenges in the five-phase Fe-PMaSynRMs. To address these critical issues, this dissertation presents the design considerations for the internal rotor and the external rotor Fe-PMaSynRM. To improve anti-demagnetization ability of the internal rotor Fe-PMaSynRM, a unique rotor structure is proposed with augmented sets of design variables. In addition, to reduce its mechanical stress, novel weight-reducing notches are adopted. The external rotor Fe-PMaSynRM is designed to offer a higher torque density, while the anti-demagnetization ability has been maintained to be comparable to the internal rotor counterpart. The finite element analysis (FEA) model has been utilized to obtain the proposed designs and satisfy the performance specifications. An extensive multiphysics FEA analysis has been conducted on the proposed design to ensure its electromagnetic and structural integrity under critical operating conditions. Simulation results show that the anti-demagnetization abilities of the proposed designs are nearly doubled compared to the state-of-the-art Fe-PMaSynRM designs. To validate the theory and simulation results, the proposed designs of a 3kW internal rotor and a 3.7kW external rotor Fe-PMaSynRM have been fabricated and tested. The simulations and experimental results show acceptable matching with FEA results, which validates the proposed designs and analysis.

Download or read book Electrical Machine Analysis Using Finite Elements written by Nicola Bianchi and published by CRC Press. This book was released on 2017-12-19 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the fan motor in your PC to precision control of aircraft, electrical machines of all sizes, varieties, and levels of complexity permeate our world. Some are very simple, while others require exacting and application-specific design. Electrical Machine Analysis Using Finite Elements provides the tools necessary for the analysis and design of any type of electrical machine by integrating mathematical/numerical techniques with analytical and design methodologies. Building successively from simple to complex analyses, this book leads you step-by-step through the procedures and illustrates their implementation with examples of both traditional and innovative machines. Although the examples are of specific devices, they demonstrate how the procedures apply to any type of electrical machine, introducing a preliminary theory followed by various considerations for the unique circumstance. The author presents the mathematical background underlying the analysis, but emphasizes application of the techniques, common strategies, and obtained results. He also supplies codes for simple algorithms and reveals analytical methodologies that universally apply to any software program. With step-by-step coverage of the fundamentals and common procedures, Electrical Machine Analysis Using Finite Elements offers a superior analytical framework that allows you to adapt to any electrical machine, to any software platform, and to any specific requirements that you may encounter.

Download or read book Modeling and Analysis of Asymmetries in Permanent Magnet Synchronous Machines written by Alejandro Jose Pina Ortega and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of soft and hard magnetic materials in the construction of electric machines has become a common practice. However, demand for machines with higher power density and efficiency sets new challenges; new machines require non-conventional geometries, materials with higher energy densities, higher operating temperatures and reliable mechanisms of control. The Permanent Magnet Synchronous Machine (PMSM) is one of the key enabling technologies that have been subject of investigation in the past few decades because it can outperform other types of electric machines in a broad range of applications. In the manufacturing of high power density PMSMs, even small manufacturing variations can impact heavily on their performance. The tolerances and imperfections lead to physical machine asymmetries, and this work deals with the modeling and analysis of these asymmetries. It is noteworthy that asymmetries can also be introduced in the machine intentionally to enhance the functionality in certain cases. By means of electromagnetic field theory, analytic models have been developed in this study; Also, numerical analysis on the basis of Finite Element Method (FEM) have been extensively used throughout this work with the aim to validate the results and further investigate the non-linear nature of materials. Prototypes of Surface-Mounted Permanent Magnet (SPM) machines, Interior Permanent Magnet (IPM) machines and Synchronous Reluctance Machines assisted Permanent Magnets (PMaSynRM) were built and tested to verify the validity of the proposed models under loaded and unloaded conditions. The results provided by the analytic models were considerably more time-efficient without compromising accuracy when compared to those of FE-based models, even when the geometries do not match perfectly owing to the limitations of solving the model in polar coordinates. %Discrepancies were found only when the machine goes beyond the linear region due to the assumption of infinite permeability in the analytic model. The analysis of radial forces showed that new vibration modes occur due to unbalanced radial pressure, which then introduce new resonance frequencies. Additionally, a geometry optimized to minimize torque ripple through controlled-asymmetry compensates harmonics in torque efficiently, but such compensation does not occur in the same manner on radial forces. The results suggest that neglecting the tolerances in the analysis might underestimate the resultant torque ripple by as much as 75\%. On the other hand, when appropriately using controlled-asymmetries, up to 90\% of reduction in the amplitude of torque pulsations are achieved. Furthermore, the effect of tolerances can be mitigated in introducing controlled-asymmetries since both cases produce similar harmonic orders in tangential and radial forces.