Parasitic Effects in PM Machines With Concentrated Windings

Magnussen, Freddy; Lendenmann, H.

doi:10.1109/tia.2007.904400

Cited by 176 publications

(50 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This coincides with eq. (3)- (6). For the high order harmonics, the magnitudes of PM and armature components are much higher than the corresponding on-load torque, which is owing to those obvious spikes shown in Fig.…”

Section: B Torque Component Separationmentioning

confidence: 93%

“…The further comparison between these two kinds of windings in terms of torque-speed characteristic was shown in [5]. The parasitic effects of adopting non-overlapping windings were analyzed in [6], especially the radial force density differences between different winding topologies. Another merit that the flux-weakening capability can be increased by adopting alternate teeth wound winding was highlighted in [7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Stator Topologies on Average Torque and Torque Ripple of Fractional-Slot SPM Machines With Fully Closed Slots

2018

IEEE Trans. on Ind. Applicat.

View full text Add to dashboard Cite

Abstract-This paper investigates the influence of concentrated winding configurations and stator core structures on torque performance of fractional-slot surface-mounted PM (SPM) machines. From analyzing the separated torque components of prototype SPM machines with 12-slots/10-poles (12S/10P) combination by frozen permeability (FP) method, it can be found that the torque ripple is closely related with local saturation in fully closed slot (FCS) machines. Besides, the heavier local saturation will also jeopardize the merit of using alternate teeth wound windings, such as obtaining higher average torque than electrical machines with all teeth wound windings. The further analysis of stator tooth relative permeability variation over one electrical period demonstrates that the major reason for torque ripple difference among these electrical machines with different stator topologies is the asymmetric saturation between the adjacent teeth. Both the subharmonic due to armature reaction (determined by winding connection and current value) and the asymmetry of stator core structure contribute to such asymmetric saturation. In order to more clearly verify this, the complementary slot/pole number combination (12S/14P) is also analyzed. The conclusion is effective for electrical machines with other slot/pole number combinations as well. Experiments have been carried out to validate the predictions.

show abstract

Section: B Torque Component Separationmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Influence of Stator Topologies on Average Torque and Torque Ripple of Fractional-Slot SPM Machines With Fully Closed Slots

2018

IEEE Trans. on Ind. Applicat.

View full text Add to dashboard Cite

show abstract

“…In [3,4], both the thrust density and power factor of the PMV motors has been improved by employing spoke magnets. In recent years, Vernier PM motor is attracting more and more attention due to their simple mechanical structure, high torque density, sinusoidal back electromotive force (EMF) waveform, and low pulsation ripple [5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Analysis and optimization of a novel linear permanent Vernier motor

Shao

Xie

2017

MATEC Web Conf.

View full text Add to dashboard Cite

Abstract. In this paper, a novel linear permanent magnet vernier (LPMV) motor is proposed. The advantages of the proposed motor are high force density, high efficiency, simple structure, and low cost. Firstly, the structure and the operation principle of the proposed motor which adopts 12-slots-11-pair-poles structure are descried. Based on the air-gap permeance function, the components of air-gap flux density is discussed. Secondly, the validation of LPMV is analyzed by finite element method (FEM), and the basic electromagnetic performance such as air-gap flux density, back-EMF, detent force and thrust waveform are analyzed in detail. Finally, the relationship between the thrust force characteristics and the design parameters are analyzed to provide useful information to the designers of LPMV.

show abstract

“…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]). However, they are also known for inducing parasitic effects [9,10] particularly in the case of three-phase PM machines, because of the harmonics of the magnetomotive forces and electromotive forces. Consequently, this kind of windings is seldom used with three-phase machines that must provide high quality torque at low speeds: the reason is that high-performance vector controls require sinusoidal electromotive forces.…”

Section: Introductionmentioning

confidence: 99%

General modeling of the windings for multi-phase ac machines

Scuiller

Semail

Charpentier

2010

Eur. Phys. J. Appl. Phys.

View full text Add to dashboard Cite

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.

show abstract

Parasitic Effects in PM Machines With Concentrated Windings

Cited by 176 publications

References 23 publications

Influence of Stator Topologies on Average Torque and Torque Ripple of Fractional-Slot SPM Machines With Fully Closed Slots

Influence of Stator Topologies on Average Torque and Torque Ripple of Fractional-Slot SPM Machines With Fully Closed Slots

Analysis and optimization of a novel linear permanent Vernier motor

General modeling of the windings for multi-phase ac machines

Contact Info

Product

Resources

About