Cogging Torque Reduction for Interior Permanent Magnet Synchronous Motors PDF Download

Author: Miquel Tost Candel
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
Interior permanent magnet synchronous machines show a good range of behaviours, which make these kinds of machines good candidates for an electromechanical energy conversion. However, in order to improve their accuracy in their torque responses, the cogging torque and torque ripple phenomena should be mitigated to obtain better performance of the machine. In order to reduce the cogging torque and torque ripple, control techniques as well as geometric parameters of the machine have to be improved. In this thesis, geometric parameters such as the use of the fractional slot windings, the improvement of the pole-arc to pole-pitch ratio and the dimensions of the stator slots are considered for the better minimization of the cogging torque and torque ripple. The results are presented to show the performance of the IPMSM with fractional slot windings as well as the reduction of the cogging torque and torque ripple. Furthermore, four models of IPMSM with fractional and integer slot windings are going to be compared with the aim of the attenuation of the cogging torque phenomenon.

Author: Sadegh Vaez-Zadeh
Publisher: Oxford University Press
ISBN: 0191060674
Category : Technology & Engineering
Languages : en
Pages : 384

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Book Description
Permanent magnet synchronous (PMS) motors stand at the forefront of electric motor development due to their energy saving capabilities and performance potential. The motors have been developed in response to mounting environmental crises and growing electricity prices, and they have enabled the emergence of motor drive applications like those found in electric and hybrid vehicles, fly by wire, and drones. Control of Permanent Magnet Synchronous Motors is a timely advancement along that path as the first comprehensive, self-contained, and thoroughly up-to-date book devoted solely to the control of PMS motors. It offers a deep and extended analysis, design, implementation, and performance evaluation of major motor control methods, including Vector, Direct Torque, Predictive, Deadbeat, and Combined Control, in a systematic and coherent manner. All major Sensorless Control and Parameter Estimation methods are also studied. The book places great emphasis on energy saving control schemes.

Author: Kai Wang
Publisher: Springer
ISBN: 981130629X
Category : Technology & Engineering
Languages : en
Pages : 216

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Book Description
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.

Author: Sandra Eriksson
Publisher: MDPI
ISBN: 3039213504
Category : Technology & Engineering
Languages : en
Pages : 282

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Book Description
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.

Author: Duane C. Hanselman
Publisher:
ISBN: 9781932133639
Category : Electric motors, Brushless
Languages : en
Pages : 0

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Book Description
Explaining techniques for magnetic modelling and circuit analysis, this book shows how magnetic circuit analysis applies to motor design. It describes the major aspects of motor operation and design, and develops design equations for radial flux and axial flux motors. It is intended for electrical, electronics and mechanical engineers.

Author: Juha Pyrhonen
Publisher: John Wiley & Sons
ISBN: 1118701658
Category : Technology & Engineering
Languages : en
Pages : 612

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Book Description
In one complete volume, this essential reference presents an in-depth overview of the theoretical principles and techniques of electrical machine design. This timely new edition offers up-to-date theory and guidelines for the design of electrical machines, taking into account recent advances in permanent magnet machines as well as synchronous reluctance machines. New coverage includes: Brand new material on the ecological impact of the motors, covering the eco-design principles of rotating electrical machines An expanded section on the design of permanent magnet synchronous machines, now reporting on the design of tooth-coil, high-torque permanent magnet machines and their properties Large updates and new material on synchronous reluctance machines, air-gap inductance, losses in and resistivity of permanent magnets (PM), operating point of loaded PM circuit, PM machine design, and minimizing the losses in electrical machines> End-of-chapter exercises and new direct design examples with methods and solutions to real design problems> A supplementary website hosts two machine design examples created with MATHCAD: rotor surface magnet permanent magnet machine and squirrel cage induction machine calculations. Also a MATLAB code for optimizing the design of an induction motor is provided Outlining a step-by-step sequence of machine design, this book enables electrical machine designers to design rotating electrical machines. With a thorough treatment of all existing and emerging technologies in the field, it is a useful manual for professionals working in the diagnosis of electrical machines and drives. A rigorous introduction to the theoretical principles and techniques makes the book invaluable to senior electrical engineering students, postgraduates, researchers and university lecturers involved in electrical drives technology and electromechanical energy conversion.

Author: Weiming Ma
Publisher: Springer Nature
ISBN: 9813366060
Category : Technology & Engineering
Languages : en
Pages : 841

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Book Description
This book includes the original, peer-reviewed research papers from the 9th Frontier Academic Forum of Electrical Engineering (FAFEE 2020), held in Xi’an, China, in August 2020. It gathers the latest research, innovations, and applications in the fields of Electrical Engineering. The topics it covers including electrical materials and equipment, electrical energy storage and device, power electronics and drives, new energy electric power system equipment, IntelliSense and intelligent equipment, biological electromagnetism and its applications, and insulation and discharge computation for power equipment. Given its scope, the book benefits all researchers, engineers, and graduate students who want to learn about cutting-edge advances in Electrical Engineering.

Author: Gianmario Pellegrino
Publisher: Springer
ISBN: 3319322028
Category : Technology & Engineering
Languages : en
Pages : 142

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Book Description
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.

Author: Mohammed Rakibul Islam
Publisher:
ISBN:
Category : Electrical engineering
Languages : en
Pages : 200

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Book Description
"This dissertation presents a methodology for designing low noise small permanent magnet synchronous motor (PMSM) drives by addressing the issues of cogging torque, torque ripple, acoustic noise and vibration. The methodology incorporates several pole shaping and magnet skew schemes in different motor topologies with similar envelop dimensions and output characteristics intended for an automotive application. The developed methodology is verified with finite element analysis (FEA) and experiments. A comprehensive design methodology has been developed for obtaining the analytical design of the machine for a given set of output characteristics. Using the FEA, the effects of various magnet shapes and skew on the machine performances (e.g. cogging torque, torque ripple etc.) have been analyzed. The FEA and experimental results show that for certain magnet designs and configurations the skewing does not necessarily reduce the ripple in the electromagnetic torque, but may cause it to increase. An analytical model to predict radial vibration due to magnetic radial pressure on the motor structure has also been developed. This model is used for predicting the noise power level for several motor topologies designed for similar powe level applications. The predicted noise levels are utilized to develop guidelines for selecting motor configurations, internal dimensions and winding types for a low-noise PMSM. The selection of low-noise PMSM is not a straightforward one; rather it is a compromise between torque harmonics and radial vibration of the machines. Some PMSM configurations with less radial vibration might have seen to posses excessive torque ripples and thereby violating the other requirements for the motor to be less noisy. Experiments are conducted to record the torque ripple variation for different magnet shapes and skew in order to validate the results of FE models. The experimental results have successfully correlated with the FE computations."--Abstract.

Author: Mohammad Farshadnia
Publisher: Springer
ISBN: 9811087083
Category : Technology & Engineering
Languages : en
Pages : 266

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Book Description
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.