On the Influence of Increased Stator Leakage Inductance in Single-Tooth Wound Synchronous Reluctance Motors

Donaghy‐Spargo, Christopher; Mecrow, B.C.; Widmer, James D.

doi:10.1109/tie.2017.2772180

Cited by 22 publications

(16 citation statements)

References 24 publications

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“…These regularities help to select the most suitable pole/slot combination or narrow down the searching space from hundreds of candidates in the early design stage, instead of simply multiplying the basic combinations. Moreover, by decomposing the synchronous inductance into different components, it found that the synchronous inductance is dominated by the stator leakage inductance, which improves the flux-weakening ability of FSCWM with SPM rotor, instead of the harmonic leakage inductance insisted in previous literatures [18]- [20]. In addition, calculation of the self-and mutual components of the stator leakage inductance by FEA concludes that the mutual component is nonnegligible, which is usually ignored in most of analytical methods proposed by previous researches.…”

Section: Introductionmentioning

confidence: 88%

“…Each component of L σ is analytically calculated for FSCWM and integer slot distributed winding machine that have same pole number and fundamental flux linkage in [23], which assumes that L σ depends only on the number of turns per coil T s and slot dimensions, yet is independent of coil connection pattern. Other researches, e.g., [20] and [24], also consider L σ related merely to T s and stator geometry parameters, such as tooth tip height t th , slot opening s o , slot width s w , slot depth s h , coil span t w and mean length of coil end l ew , as shown in Fig. 3.…”

Section: A Stator Leakage Inductancementioning

confidence: 99%

“…In addition, (11) takes only self-inductance into account. Mutual coupling between each coil is assumed to be negligible in many literatures [20], [23]. Permeance function models that accounting for mutual coupling are rare in existing literatures [16].…”

Section: A Stator Leakage Inductancementioning

confidence: 99%

See 2 more Smart Citations

Investigation Study of the Influence of Pole Numbers on Torque Density and Flux-Weakening Ability of Fractional Slot Concentrated Winding Wheel-Hub Machines

et al. 2019

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Fractional slot concentrated winding machines (FSCWMs) with the low operation speed and large diameter usually have a large number of poles and slots; thus, numerous pole/slot combinations are feasible. The common practice to choose pole/slot combinations by multiplying the basic combinations may neglect some competitive candidates. Taking 36-slot FSCWMs as examples, this paper investigates the influence of pole numbers on torque density and flux-weakening ability, the two most vital performances of wheel-hub machine. It is shown that the machines with pole number slightly less than the slot number have the highest torque densities. Each component of synchronous inductance is separately analyzed, and its variation against pole numbers shows obvious regularity. Machines with pole numbers larger than the slot numbers have an excellent flux-weakening ability due to the large inductance and small permanent magnet flux linkage. The measurements together with the finite element analysis results confirm that the stator leakage inductance contributes the most to the superior flux-weakening ability. The identical analysis is also performed on 54-slot and 81-slot FSCWMs, with similar regularities observed.

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Section: Introductionmentioning

confidence: 88%

Section: A Stator Leakage Inductancementioning

confidence: 99%

See 1 more Smart Citation

Investigation Study of the Influence of Pole Numbers on Torque Density and Flux-Weakening Ability of Fractional Slot Concentrated Winding Wheel-Hub Machines

et al. 2019

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“…Recently, many researchers investigated the possibility of reducing the vibrations and acoustic noise of conventional SRMs by using sinewave current supply rather than the classic rectangular wave current supply (120 electrical degrees conduction for 3-phase SRMs). This in effect makes SRMs become the doubly salient synchronous reluctance machines, as investigated in [4][5][6][7]. It has been found that the sinewave current supply has significant benefits on the radial force excitation reduction, which is the primary source of the vibrations and acoustic noise [8]- [9].…”

Section: Nomenclature Srmmentioning

confidence: 99%

Comparative Studies of Torque Performance Improvement for Different Doubly Salient Synchronous Reluctance Machines by Current Harmonic Injection

Zhang

Zhu

et al. 2019

IEEE Trans. Energy Convers.

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“…It also provides a more flexible control strategy for SRMs to improve the torque performance. However, it is worth noting that the SRMs with sinewave current supply are actually doubly salient synchronous reluctance machines (DS-SRMs) [13]- [15].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Contribution of Inductance Harmonics to Torque Production in Multiphase Doubly Salient Synchronous Reluctance Machines

Zhang

Zhu

et al. 2019

IEEE Trans. Magn.

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including the URL of the record and the reason for the withdrawal request.Abstract-This paper investigates the contribution of each order inductance harmonic to the torque (both average torque and torque ripple) of multiphase doubly salient synchronous reluctance machines (DS-SRMs). Such machines are similar to switched reluctance machines but supplied with sinewave currents. The investigations in this paper are as follows: first, a general analytical torque model based on Fourier Series analysis of inductances has been built for machines with different phase numbers, slot/pole number combinations and also winding configurations. The instantaneous torque for DS-SRMs with any given phase number can then be accurately predicted. Using such model, contribution of each order inductance harmonic to torque can be investigated separately. It is found that the torque ripple frequency of the DS-SRM only depends on phase number. For example, for a m-phase machine, there will be m×k th order torque ripple if , where m is phase number and k is a natural number. This study also explains why certain phase numbers inherently produce lower torque ripple than others. The findings in this paper provide a future direction for potential torque ripple reduction methods either from machine design or advanced control. The simulations have been validated by experiments using a 6-phase DS-SRMs.Index Terms-Doubly-salient, multiphase machine, synchronous reluctance machine, torque harmonic.

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On the Influence of Increased Stator Leakage Inductance in Single-Tooth Wound Synchronous Reluctance Motors

Cited by 22 publications

References 24 publications

Investigation Study of the Influence of Pole Numbers on Torque Density and Flux-Weakening Ability of Fractional Slot Concentrated Winding Wheel-Hub Machines

Investigation Study of the Influence of Pole Numbers on Torque Density and Flux-Weakening Ability of Fractional Slot Concentrated Winding Wheel-Hub Machines

Comparative Studies of Torque Performance Improvement for Different Doubly Salient Synchronous Reluctance Machines by Current Harmonic Injection

Investigation on Contribution of Inductance Harmonics to Torque Production in Multiphase Doubly Salient Synchronous Reluctance Machines

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