A Comparison Between the TORUS and AFIR Axial-flux Permanent-magnet Machine Using Finite Element Analysis PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download A Comparison Between the TORUS and AFIR Axial-flux Permanent-magnet Machine Using Finite Element Analysis PDF full book. Access full book title A Comparison Between the TORUS and AFIR Axial-flux Permanent-magnet Machine Using Finite Element Analysis by Amin Mahmoudi. Download full books in PDF and EPUB format.
Author: Amin Mahmoudi
Publisher:
ISBN:
Category : Permanent magnet motors
Languages : en
Pages :
Get Book Here
Book Description
Author: Amin Mahmoudi
Publisher:
ISBN:
Category : Permanent magnet motors
Languages : en
Pages :
Get Book Here
Book Description
Author: Zhang, Bo
Publisher: KIT Scientific Publishing
ISBN: 373150619X
Category : Technology (General)
Languages : en
Pages : 292
Get Book Here
Book Description
Nowadays, the manufacturing of electrical machines based on electrical steel laminations has been well established worldwide. Compared with the electrical steel, the soft magnetic composites (SMC) shows magnetic isotropy and lower eddy current losses. Thus, it becomes an important impulse promoting the development of new topologies of electrical machine. The application of SMC in the electrical traction machine for hybrid electrical vehicle or electrical vehicle has been researched in the work.
Author: IEEE Industry Applications Society
Publisher:
ISBN:
Category : Electrical engineering
Languages : en
Pages : 740
Get Book Here
Book Description
Author: Metin Aydin
Publisher:
ISBN:
Category :
Languages : en
Pages : 506
Get Book Here
Book Description
Author: Sajjad Mohammadi Yangijeh
Publisher:
ISBN:
Category :
Languages : en
Pages : 209
Get Book Here
Book Description
Recently, magnetic gears have drawn significant interest as a promising alternative to their mechanical counterparts by introducing features such as generating high torque at low speed, reduced acoustic noise and vibrations, low maintenance, inherent overload protection, improved reliability, physical isolation between shafts, and contactless power transfer. Conventional electrical machines can be combined with magnetic gears to form a compact device called a magnetically-geared machine. They have found their way into mechatronics, wind turbines, wave energy generation and electric vehicles. Such devices can be studied by numerical techniques or analytical frameworks. The former such as finite element methods (FEM), although powerful, is expensive and time-consuming, while the latter approach like flux-tube based models provide a flexible yet reasonable solution for preliminary designs and optimizations. In this thesis, there has been a comprehensive study on flux-tube based modeling and finite element analysis of the machine. The stator is represented using flux-tube based carterâĂŹs coefficient and a surface current density. The permanent magnets are modeled by different approaches including magnetization density, Coulombian fictitious charges and Amperian currents. The air-gap permeances are also modeled by flux-tubes. Closed-form expressions for the magnetic fields has been extracted. The developed torques has been calculated by different techniques including Maxwell stress tensor, Lorentz force and Kelvin force density. These options provide designers with a universal and flexible framework, enabling them to pick the best technique according to the configuration and application. The field modulation concepts and the gearing effects have been investigated using the developed analytical framework as well as 2D and 3D FEM, whose results agree. Both radial-flux and axial-flux configurations, the two main structures of rotating electrical machines, have been studied as well.
Author: Ju Hyung Kim
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
This thesis proposes topologies of axial flux-switching permanent magnet (AxFSPM) machines having a 6-slot/4-pole configuration. Different from other high-pole topologies, the proposed topologies achieve the capability of even harmonics elimination taking advantages of a dual structure of AxFSPM machine. The dual structure AxFSPM machine includes a dual-rotor single-stator (DRSS) and a dual-stator single-rotor (DSSR) AxFSPM machines. Other cascaded versions are possible. Significant attention is devoted to developing several alternative approaches to reducing the number of rotor poles. Theory of eliminating even harmonics of the flux linkage is presented introducing a new concept of a stator and a rotor shifting to find the offset angle between stator and rotor pole. Furthermore, this thesis presents technical details of the proposed topologies, including sizing equations of the AxFSPM machine, scalability of the sizing equation, topology comparison, cogging torque elimination methods, manufacturing tolerance issue, demagnetization, and structural dynamics of AxFSPM machines. For the initial design of the proposed topology, sizing equations are derived considering the PM dimension and the magnetic flux. The sizing equations are also verified with finite element analysis (FEA) and prototyping to generalize the scalability of the AxFSPM machine. The characteristics of the proposed topologies are investigated with FEA supported by experimental results. Topologies are compared for dual-structure AxFSPM machines as well as dual-rotor single stator axial flux surface PM (AxSPM) machine. Various rotor tooth shaping methods are proposed and compared using FEA to reduce the cogging torque and ripple torque maintaining average torque. Manufacturing tolerance of AxFSPM machine is considered and investigated to quantify the effect of flaws in the manufacturing process. Demagnetization is investigated to provide an understanding of problems of PMs in the stator. Structure dynamics are also considered understanding the effect of dual-structure in AxFSPM machines. Through proof of concept machine, this thesis proves that the proposed topologies physically can be realized in AxFSPM machine. The proof of concept machine also verifies that dual structure is beneficial to eliminate the even harmonics in 6-slot/4-pole AxFPSM machine.
Author: Xu Yang
Publisher:
ISBN: 9781303514944
Category : Permanent magnet motors
Languages : en
Pages : 0
Get Book Here
Book Description
The rotor and magnet loss in single-sided axial flux permanent magnet (AFPM) machines with non-overlapped windings is studied in this dissertation. Finite element analysis (FEA) estimations of the loss are carried out using both 2D and 3D modeling. The rotor and magnet losses are determined separately for stator slot passing and MMF space harmonics from currents in the stator. The segregation of loss between the solid rotor plate and the magnet is addressed. The eddy current loss reduction by magnet segmentation is discussed as well. Two prototype 24 slot/22 pole single-sided AFPMs, fabricated with both single layer (SL) and double layer (DL) windings are assembled. Methods of loss segregation are illustrated in order to separate the eddy current loss. Finally, an optimal design approach to axial flux permanent magnet machines is presented.
Author: Jacek F. Gieras
Publisher: Springer Science & Business Media
ISBN: 1402082274
Category : Technology & Engineering
Languages : en
Pages : 365
Get Book Here
Book Description
Axial Flux Permanent Magnet (AFPM) brushless machines are modern electrical machines with a lot of advantages over their conventional counterparts. This timeless and revised second edition deals with the analysis, construction, design, control and applications of AFPM machines. The authors present their own research results, as well as significant research contributions made by others.
Author: Iftekhar Hasan
Publisher:
ISBN:
Category : Electric machines
Languages : en
Pages : 125
Get Book Here
Book Description
Commercially available permanent magnet synchronous machines (PMSM) typically use rare-earth-based permanent magnets (PM). However, volatility and uncertainty associated with the supply and cost of rare-earth magnets have caused a push for increased research into the development of non-rare-earth based PM machines and reluctance machines. Compared to other PMSM topologies, the Transverse Flux Machine (TFM) is a promising candidate to get higher torque densities at low speed for direct-drive applications, using non-rare-earth based PMs. The TFMs can be designed with a very small pole pitch which allows them to attain higher force density than conventional radial flux machines (RFM) and axial flux machines (AFM).This dissertation presents the modeling, electromagnetic design, vibration analysis, and prototype development of a novel non-rare-earth based PM-TFM for a direct-drive wind turbine application. The proposed TFM addresses the issues of low power factor, cogging torque, and torque ripple during the electromagnetic design phase.An improved Magnetic Equivalent Circuit (MEC) based analytical model was developed as an alternative to the time-consuming 3D Finite Element Analysis (FEA) for faster electromagnetic analysis of the TFM. The accuracy and reliability of the MEC model were verified, both with 3D-FEA and experimental results. The improved MEC model was integrated with a Particle Swarm Optimization (PSO) algorithm to further enhance the capability of the analytical tool for performing rigorous optimization of performance-sensitive machine design parameters to extract the highest torque density for rated speed.A novel concept of integrating the rotary transformer within the proposed TFM design was explored to completely eliminate the use of magnets from the TFM. While keeping the same machine envelope, and without changing the stator or rotor cores, the primary and secondary of a rotary transformer were embedded into the double-sided TFM. The proposed structure allowed for improved flux-weakening capabilities of the TFM for wide speed operations.The electromagnetic design feature of stator pole shaping was used to address the issue of cogging torque and torque ripple in 3-phase TFM. The slant-pole tooth-face in the stator showed significant improvements in cogging torque and torque ripple performance during the 3-phase FEA analysis of the TFM. A detailed structural analysis for the proposed TFM was done prior to the prototype development to validate the structural integrity of the TFM design at rated and maximum speed operation. Vibration performance of the TFM was investigated to determine the structural performance of the TFM under resonance.The prototype for the proposed TFM was developed at the Alternative Energy Laboratory of the University of Akron. The working prototype is a testament to the feasibility of developing and implementing the novel TFM design proposed in this research. Experiments were performed to validate the 3D-FEA electromagnetic and vibration performance result.
Author: Mohammad Farshadnia
Publisher: Springer
ISBN: 9811087083
Category : Technology & Engineering
Languages : en
Pages : 266
Get Book Here
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.
