Analytical Modeling of Modular and Unequal Tooth Width Surface-Mounted Permanent Magnet Machines

Li, Guangjin; Zhu, Z. Q.

doi:10.1109/tmag.2015.2432735

Cited by 31 publications

(11 citation statements)

References 17 publications

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“…22(c) and (d), which verifies the statement above. If there are no tooth-tips in this kind of modular machine, the influence of flux barrier width will have practically the same effect on electromagnetic performance as those counterparts with tooth-tips [74], [75]. Fig.…”

Section: Wind Power Generatorsmentioning

confidence: 97%

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Modularity techniques in high performance permanent magnet machines and applications

Zhu

2018

Trans. Electr. Mach. Syst.

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This paper reviews the modularity techniques in the stator manufacture of permanent magnet machines for different applications. Some basic concepts of modular machines are firstly introduced. Modular machines for several typical applications are then described in details, including domestic appliances, automobiles and electric vehicles, more electric aircrafts and civic applications, wind power generators, etc. Besides, the influence of manufacture tolerance gaps and flux barriers on the electromagnetic performance is discussed.

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Section: Wind Power Generatorsmentioning

confidence: 97%

“…Overall, the influence of flux barrier width and tooth-tip width on pitch factor plays the dominant role [68], [74][75][76].…”

Section: Conventional Modularmentioning

confidence: 99%

Modularity techniques in high performance permanent magnet machines and applications

Zhu

2018

Trans. Electr. Mach. Syst.

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“…In addition, this specific range of q gives the highest fundamental component of the winding factor, K w1 , which results in a higher torque production capability. Because a suitable design for field weakening operation has been obtained, the design study is focused on machines with q = 2/5 and an alternate teeth-wound stator [22]. Figure 2 is the demonstration of a sub-fractional slot-concentrated winding with all teeth-wound and alternate teeth-wound stator structure versions, where FF is the fill factor, and A is the slot area.…”

Section: The Proposed Sub-fractional Slot-concentrated Windings Strucmentioning

confidence: 99%

“…From the general theory of PM machines, it is obvious that the highest torque production can be accomplished by using designs which have an entirely overlapped coil pitch and pole pitch [22]. However, this type of design cannot produce a rotating motion.…”

Section: The Proposed Sub-fractional Slot-concentrated Windings Strucmentioning

confidence: 99%

On Field Weakening Performance of a Brushless Direct Current Motor with Higher Winding Inductance: Why Does Design Matter?

Üstün

Kıvanç

Senol³

et al. 2018

Energies

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This paper comprises the design, analysis, experimental verification and field weakening performance study of a brushless direct current (BLDC) motor for a light electric vehicle. The main objective is to design a BLDC motor having a higher value d-axis inductance, which implies an improved performance of field weakening and a higher constant power speed ratio (CPSR) operation. Field weakening operation of surface-mounted permanent magnet (SMPM) BLDC motors requires a large d-axis inductance, which is characteristically low for those motors due to large air gap and PM features. The design phases of the sub-fractional slot-concentrated winding structure with unequal tooth widths include the motivation and the computer aided study which is based on Finite Element Analysis using ANSYS Maxwell. A 24/20 slot-pole SMPM BLDC motor is chosen for prototyping. The designed motor is manufactured and performed at different phase-advanced currents in the field weakening region controlled by a TMS320F28335 digital signal processor. As a result of the experimental work, the feasibility and effectiveness of field weakening for BLDC motors are discussed thoroughly and the contribution of higher winding inductance is verified.

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“…These additional air-gaps can lead to higher machine cogging torque, reduction in the back EMF, change in the winding factor, etc. [13], [14]. In this paper, a modular concept is introduced for the slotless permanent magnet machine.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Local and Global Forces Acting on the Coil Structure of a Modular Slotless Permanent Magnet Generator

Kallaste

Vaimann

Belahcen

et al. 2019

Electrical, Control and Communication Engineering

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This paper investigates the local and global forces acting on the coil structure of a low-speed modular permanent magnet generator for wind energy application. Two different configurations of the coil structure are studied. The first one consists of separately replaceable single-coil modules, whereas the second consists of three-phase coil-module assemblies. The purpose of the analysis is to investigate the advantages and disadvantages of each configuration in terms of vibrations and mechanical robustness. The investigations also provide the load for the mechanical analysis needed in the design of the retaining structure of the generator. The results show that there are strong fluctuations in the radial forces acting on the single-coil structure. The three-phase coil-module assembly reduces the fluctuations of the radial forces, but it results in an increase of the cogging torque, which is not suitable for the slotless design. Namely, the advantage of the slotless design is to reduce the cogging torque. The computed forces are then used in a structural mechanical simulation, the results of which are validated through strain measurements. The validation procedure is carried out on a specially built mock-up as accessing the generator on site is not possible.

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Analytical Modeling of Modular and Unequal Tooth Width Surface-Mounted Permanent Magnet Machines

Cited by 31 publications

References 17 publications

Modularity techniques in high performance permanent magnet machines and applications

Modularity techniques in high performance permanent magnet machines and applications

On Field Weakening Performance of a Brushless Direct Current Motor with Higher Winding Inductance: Why Does Design Matter?

Analysis of the Local and Global Forces Acting on the Coil Structure of a Modular Slotless Permanent Magnet Generator

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