Synthesis of high performance PM motors with concentrated windings

Cros, J.; Viarouge, P.

doi:10.1109/tec.2002.1009476

Cited by 561 publications

(63 citation statements)

References 2 publications

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“…In several literature surveys [8][9][10][11][12], the lowest common multiple (LCM), the winding factor, and an unbalanced magnetic pull (UMP) have been considered as the selection criteria. These factors were considered, and seven combinations were chosen with four ratios of pole and slot numbers (PSR), as listed in Table 2.…”

Section: Pole-slot Combinations Considered In Designmentioning

confidence: 99%

Permanent Magnet Motor Design for Turrets with Large Diameters

Lee¹,

Joo²,

Hong³

et al. 2013

Journal of Magnetics

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This paper deals with an approach for the initial design of a permanent magnet motor for turrets with large diameters. The proposed design techniques are introduced as three stages. The first is the selection of a pole-slot combination, the second is the selection of the rotor topology, and the last is choosing the outermost dimensions. In every stage, a useful technique is described with considerations for effective fabrication and motor performance, and magnetic field computation is performed using the finite element method.

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Section: Pole-slot Combinations Considered In Designmentioning

confidence: 99%

Permanent Magnet Motor Design for Turrets with Large Diameters

Lee¹,

Joo²,

Hong³

et al. 2013

Journal of Magnetics

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show abstract

“…In this case, in order to ensure a balanced winding for a N -phase machine with N s slots, N s must be a multiple of N [4]. This condition actually results from the necessity of obtaining regularly shifted phases.…”

Section: Rules For Obtaining a Balanced Multi-phase Windingmentioning

confidence: 99%

“…Studies on concentrated fractional windings [3][4][5][6] have been carried out especially on Permanent Magnet synchronous machines. For the manufacturers, these windings are attractive when compared with distributed windings because they allow shorter end-windings (with reduced losses [7,8] and easier winding processes [6]).…”

Section: Introductionmentioning

confidence: 99%

General modeling of the windings for multi-phase ac machines

Scuiller

Semail

Charpentier

2010

Eur. Phys. J. Appl. Phys.

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Abstract. This paper, which deals with the winding modeling of ac multi-phase machines with a regular distribution of the stator slots, details an original matrix modeling of the stator winding. First, the properties of the balanced multi-phase windings (with integral-slot and fractional-slot patterns) are analysed. The winding function approach, one of the most common way to model the winding distribution effects on the stator rotating field, is then introduced. For multi-phase machines, it will be shown that the pole number generated by the winding distribution depends on a new parameter: the circularity index. The discrete nature of the winding, imposed by the stator slots, leads to the development of a discrete modeling of the winding obtained from sampling the winding function: two matrices, the winding function matrix and the distribution function matrix, are introduced to characterize the multi-phase winding. This matrix approach is thus a concise way to calculate the winding factors and to estimate the set of self and mutual stator inductances for smooth air gap multi-phase machines. A particularly original method of obtaining an analytical expression for the leakage mutual inductance is described. The results are validated with two experimental 5-phase PM machines by using experimental measurements and numerical simulations.

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“…In this respect, the presence of the modulation flux of a vernier machine provides additional considerations in the iron core design as follows. In general, the number of PM poles is closely related with the yoke structure of PM machines, that is, the thicknesses of yoke and teeth of a PM machine are inversely proportional to the number of PM-poles [13,14]. However, this is not exactly true for a vernier PM machine because of its additional modulation flux apart from the regular PM flux.…”

Section: Introductionmentioning

confidence: 99%

Design of a PM Vernier Machine with Consideration for Modulation Flux and Comparison with Conventional PM motors

Kim¹

2017

Energies

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This study deals with the core design of a PM vernier machine considering modulation flux effects, and the comparative investigation on volume and performance characteristics of the vernier over conventional PM machines are addressed. To these ends, for a PM vernier machine in operation at the base-speed, the flux density equations for teeth and yokes considering the flux modulation effects are derived, where the air gap harmonic permeance function is used. Using the derived equations, a PM vernier motor with specified yoke flux densities is designed. To identify the predicted flux yoke densities, the flux distribution and iron losses in core parts are analyzed through time-step finite element (FE) simulations. Through Fourier series expansion of the air gap flux waves obtained by FE analysis at several specified times, the harmonic components constituting the flux waves are investigated and their speeds are also evaluated in numerical ways. Finally, to estimate the competitiveness of vernier machines versus conventional machines, the designed PM vernier motor is compared against two different conventional PM motors designed through the same design procedures in various aspects such as volume, torque capacity, efficiency, and power factor, in which, in particular, the core losses are included in efficiency calculation.

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Synthesis of high performance PM motors with concentrated windings

Cited by 561 publications

References 2 publications

Permanent Magnet Motor Design for Turrets with Large Diameters

Permanent Magnet Motor Design for Turrets with Large Diameters

General modeling of the windings for multi-phase ac machines

Design of a PM Vernier Machine with Consideration for Modulation Flux and Comparison with Conventional PM motors

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