Analysis and Design Optimization of an Improved Axially Magnetized Tubular Permanent-Magnet Machine

Wang, Jiabin; Howe, D.; Jewell, G.W.

doi:10.1109/tec.2004.827026

Cited by 107 publications

(46 citation statements)

References 14 publications

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“…The focus of these publications were generally of the torque-or total harmonic distortion (THD) measurements of the system [36][37][38][39] or its demagnetization behavior [32][33][34][35]. A number of studies have investigated linear machines with magnetization in the direction of motion [40][41][42][43][44]. Furthermore, modified pole shoes for a rotating PM synchronous wind turbine [45] and different salient pole shoe faces for a synchronous machine [46] were previously studied.…”

Section: Introductionmentioning

confidence: 99%

Study of an Altered Magnetic Circuit of a Permanent Magnet Linear Generator for Wave Power

et al. 2017

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The wave energy converter (WEC) studied and developed at Uppsala University in Sweden is a point absorbing buoy connected to a linear generator (LG) on the seabed. Previous studies have improved the sustainability of the generator, changing its magnets from Nd 2 Fe 14 B-magnets to ferrites. In this paper, the magnetic circuit of the linear generator is further studied. Ferrite magnets of two different types (Y30 and Y40) are studied along with different shapes of pole shoes for the system. The finite element method (FEM) simulations in a program called Ace are performed. The results show that a linear generator including both Y30 and Y40 magnets and shortened T-shaped pole shoes can generate a similar magnetic energy in the airgap as a linear generator only containing Y40 magnets and rectangular pole shoes. This shows that the magnetic circuit can be altered, opening up sizes and strengths of magnets for different retailers, and thereby possibly lowering magnet cost and transportation. This work was previously presented as a conference at the European Wave and Tidal Energy Conference (EWTEC) 2017 in Cork, Ireland; this manuscript has been carefully revised and some discussions, on magnet costs for example, have been added to this paper.

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Section: Introductionmentioning

confidence: 99%

Study of an Altered Magnetic Circuit of a Permanent Magnet Linear Generator for Wave Power

et al. 2017

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“…However, various analytical models which used analytic field solution have been proposed. Some of them concern rotational electrical machines [6][7][8][9][10], and others linear machines [11][12]. An attractive motor design method and analysis is presented in [6] it is shown that the Halbach magnetized PMSM motor has 15% lower volume than the radial magnetized one.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization design and performance evaluation of slotted Halbach PMSM using Monte Carlo method

et al. 2017

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This paper proposes the optimized design of the permanent magnet synchronous motor (PMSM) based on the analysis of radial-flux permanent magnet motor with minimum weight, maximum efficiency and an increased torque. The rotor of the PMSM uses segmented permanent magnets mounted on the surface. The achievement of the method involves four steps. Firstly, the simplified motor model is presented in a manner which yields symbolic solution for optimal motor parameters as a function of mass. Secondly, Monte Carlo method is employed to compute optimal motor dimensions giving efficiency, torque and optimal motor active mass. Then, the steady state characteristics of the optimized primary optimized design obtained in the last step are calculated and compared to satisfy the flux condition. Finally, the performance of the optimized machine has been calculated by using 2D transient finite-element analysis (FEA). Subsequently, the model mesh and the boundary conditions were handled and presented. According to the obtained results, the essential purpose of the work has been reached, the weight has been reduced by 24%, the efficiency was improved by 8% and the rated torque by 40%. The proposed design approach has also the advantage for its significant time reduction of the design cycle.

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“…However, the magnetization of a PM mover composed of AMPMs and iron poles cannot be modeled homogeneously [5], resulting in complicated boundary conditions in the z-direction [7]. These boundary conditions make it difficult to approach analytically.…”

Section: Introductionmentioning

confidence: 99%

Analytical and Experimental Study for Electromagnetic Performances of a Tubular Linear Machine with Axially Magnetized Single-sided Permanent Magnets

Shin¹,

Jeong²,

Choi³

et al. 2015

Journal of Magnetics

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This paper presents an electromagnetic analysis of a tubular linear machine with axially magnetized permanent magnets using improved analytical techniques. Based on the magnetic vector potential and a two-dimensional polar-coordinate system, the magnetic field and armature reaction field can be derived. Using these, equivalent circuit parameters, such as the electromotive force and inductance, can be obtained analytically. Finally, the generating characteristics are derived with the equivalent circuit method. In this study, the finite element method was employed to provide a comparative evaluation, and experiments were conducted to validate the results of the analytical analysis.

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Analysis and Design Optimization of an Improved Axially Magnetized Tubular Permanent-Magnet Machine

Cited by 107 publications

References 14 publications

Study of an Altered Magnetic Circuit of a Permanent Magnet Linear Generator for Wave Power

Study of an Altered Magnetic Circuit of a Permanent Magnet Linear Generator for Wave Power

Multi-objective optimization design and performance evaluation of slotted Halbach PMSM using Monte Carlo method

Analytical and Experimental Study for Electromagnetic Performances of a Tubular Linear Machine with Axially Magnetized Single-sided Permanent Magnets

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