Estimation and comparison of the windage loss of a 60 kW Switched Reluctance Motor for hybrid electric vehicles

Kiyota, Kyohei; Kakishima, Takeo; Chibá, Akira

doi:10.1109/ipec.2014.6870001

Cited by 24 publications

(10 citation statements)

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“…These losses can be estimated with the formulas proposed in [53], which are also implemented in [14]. References [54], [55] confirm the losses with some experimental results. …”

Section: A Lossesmentioning

confidence: 60%

Technology, Research and Applications of Switched Reluctance Drives

et al. 2017

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Abstract-Electrical drives are one of the major consumers of electrical energy and their penetration in the market is still growing. Hence, for many drive applications efficient, reliable and cost effective solutions have to be found. Switched reluctance drives (SRD) offer a potential solution when focus is mainly on cost and robustness. However, to benefit from the unique advantages of this machine type a deep understanding of its strongly non-linear behavior is required. After discussing some major differences to classic rotating field machines, this paper presents a broad overview of the state of the art of SRD taking into consideration all aspects relevant to machine modeling, design and control development process. Finally, applications on the market utilizing SRDs and the focus of current research is presented. After reading this paper the reader will be able to assess if this modern drive technology could be advantagous in a given application.

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“…These losses can be estimated with the formulas proposed in [53], which are also implemented in [14]. References [54], [55] confirm the losses with some experimental results. …”

Section: A Lossesmentioning

confidence: 60%

Technology, Research and Applications of Switched Reluctance Drives

et al. 2017

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“…This helped in bringing down the windage loss by a factor of 5 (Figs. 8 and 9) [41–45]. A summary of windage losses highlighting the significant results is provided in Table 2.…”

Section: Losses In Srmmentioning

confidence: 99%

Review based on losses, torque ripple, vibration and noise in switched reluctance motor

Seshadri

Lenin

2019

IET Electric Power Applications

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Some key features to be satisfied by electric motors catering a wide range of applications are high specific power, lower manufacturing cost, rugged construction, and fault‐tolerant operation. Switched reluctance motor is one such motor technology satisfying all the above requirements and is an emerging competitor to the induction and permanent magnet motors in domestic, industrial and electric vehicle applications. The present‐day research on this motor is moving towards improving efficiency at lower speeds, power density, and the torque density. Certain challenges in achieving the same are (a) minimising the losses, (b) mitigation of torque ripple, noise, and vibration, and (c) material advancements. A review based on the estimation and mitigation techniques of each of these over the past three to four decades has been dealt with in this study. The salient features and results in each section provide a clear understanding of how each of these challenges can be overcome in the aspect of design and control strategies.

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“…All of these heat losses will be used as an input to the model, except the windage losses in the air gap. These losses are computed by the correlation of Kiyota et al [23]: ̇= ( − 1) 4 3 , with the air density, the rotor outer radius, the rotor axial length, the salient pole coefficient and the drag coefficient. These last two coefficients can be found in the work of Kiyota et al [23].…”

Section: Heat Lossesmentioning

confidence: 99%

“…These losses are computed by the correlation of Kiyota et al [23]: ̇= ( − 1) 4 3 , with the air density, the rotor outer radius, the rotor axial length, the salient pole coefficient and the drag coefficient. These last two coefficients can be found in the work of Kiyota et al [23]. To make a comparison between the performance of the cooling methods, two additional corrections are taken into account:…”

Section: Heat Lossesmentioning

confidence: 99%

Advanced Lumped Parameter Model for Switched Reluctance Motors With High Performance Cooling

Beyne¹,

Clarie²,

T’Jollyn³

et al. 2018

International Heat Transfer Conference 16

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In this paper an advanced thermal lumped parameter model for a switched reluctance electric motor (SRM) is constructed, based on a 2D thermal finite element simulation of a radial cross section of the motor. When applying and combining advanced cooling methods such as direct coil cooling, end winding cooling (radial stretched) and spray cooling on an SRM, the conventional lumped parameter models can no longer be used due to the 3D and complex temperature gradients in the motor. In standard LP models, mostly one simple cooling method is implemented by which the thermal gradients are also quite simple (1D or 2D). When combining different cooling methods, the gradients become highly 3D and these LPM are no longer valid. To improve the accuracy of this problem, a fully 3D thermal finite element simulation could be performed, but this would unnecessarily increase effort, complexity and computational time. To avoid this an advanced lumped parameter model is constructed in this paper, such that the high thermal gradients are modeled in more detail. The results from one 2D finite element simulation of a radial cross section of half of a stator tooth are reduced to a simpler lumped parameter model with more nodes in the most crucial parts, i.e., where the highest thermal gradients are expected. The 2D thermal model is then expanded to a 3D lumped parameter model, including the gradients in axial direction. Using this model, various cooling configurations and geometry parameters can be varied easily such that the design of an SRM with advanced cooling can be optimized efficiently.

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Estimation and comparison of the windage loss of a 60 kW Switched Reluctance Motor for hybrid electric vehicles

Cited by 24 publications

References 0 publications

Technology, Research and Applications of Switched Reluctance Drives

Technology, Research and Applications of Switched Reluctance Drives

Review based on losses, torque ripple, vibration and noise in switched reluctance motor

Advanced Lumped Parameter Model for Switched Reluctance Motors With High Performance Cooling

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