Improvement of efficiency by stepped-skewing rotor for switched reluctance motors

Sugiura, M.; Ishihara, Yuji; Ishikawa, Hiroyasu; Naitoh, Haruo

doi:10.1109/ipec.2014.6869729

Cited by 13 publications

(8 citation statements)

References 10 publications

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“…Multi‐layered switched reluctance motors provided additional 25% decrease in the ripple [57–59]. Notches on the stator and rotor teeth also helped in achieving 38% reduced torque ripple [60–62] while, creating non‐circular air gap in the machine by suitable stator and rotor pole shaping and slotting brought down the ripple torque by 42% [63–66].…”

Section: Torque Ripplementioning

confidence: 99%

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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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Section: Torque Ripplementioning

confidence: 99%

“… Summary on torque ripple design strategies [46–68] Unintentional overlook of data is possible, though the information provided here is to the best of the author's knowledge…”

Section: Torque Ripplementioning

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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“…Switched reluctance machine (SRM) drives have compelling characteristics, such as ruggedness, low cost, and safe operation in a hazardous environment [1–7]. The lack of rare earth permanent magnets is a decisive advantage as prices for the raw materials needed in their production are unpredictable and subject to supply chain issues.…”

Section: Introductionmentioning

confidence: 99%

“…With this aim, control strategies have been studied and optimised in [1–3]. Furthermore, the influence of stator pole to rotor pole ratio was analysed in [4, 5], and skewing and stacking of the rotor have been considered in [6, 7].…”

Section: Introductionmentioning

confidence: 99%

Comparison of winding configurations in double‐stator switched reluctance machines

Cosoroaba

Bostanci

et al. 2017

IET Electric Power Applications

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The double‐stator configuration of the switched reluctance machine (SRM) aims to maximise the energy conversion efficiency by optimising the ratio of motional force to the total magnetic force. Maintaining the attractive features of SRM, the double‐stator switched reluctance machine (DSSRM) proves to have higher torque/power density than the conventional SRM, which is a crucial feature for traction applications. The original winding configuration used in DSSRM is the full‐pitch winding, which yields high‐power density but causes significant heat within the machine's end windings. As end windings do not take part in torque generation, concentrated windings were proposed to reduce the heat as well as to reduce the size, cost, and weight of the machine. This study provides a detailed comparative analysis of the effects that the winding configuration has on the performance of a 100kW DSSRM, with emphasis on flux density distribution, efficiency, and heat generation. It is concluded that the concentrated windings are a better alternative to the full‐pitch windings in DSSRM.

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“…It has 20% steel savings and higher performances such as higher power density and efficiency, and lower core losses. In [26], a novel SRM with stepped-skewing rotor is proposed to improve efficiency. The designed SRM is divided into three stacks, and only rotor is skewed.…”

mentioning

confidence: 99%

Analysis and Development of Novel Three-Phase Hybrid Magnetic Paths Switched Reluctance Motors Using Modular and Segmental Structures for EV Applications

Ding

Ling

2015

IEEE/ASME Trans. Mechatron.

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The classical switched reluctance motors (SRMs) often suffer from drawbacks such as low power and torque densities, high torque ripple, mutual coupling, etc., which limit their industrial applications. This paper presents the analysis and development of two novel three-phase SRMs with hybrid magnetic paths comprising six E-shaped modular stators and three segmental common rotors, termed as the modular SRMs (MSRMs), for electric vehicle applications. The machine topologies with different winding arrangements are described. The voltage and output power equations are analytically derived, and some design particularities and parameters are discussed. The field distributions and static magnetic characteristics of an MSRM with double coil are analyzed by using 3-D finite-element method. After that, two MSRMs with different winding arrangements, namely a doublecoil MSRM and single-coil MSRM, are analyzed and compared to evaluate the distinct features of this novel MSRM, accompanied with a classical three-phase 6/4 SRM. The comparison includes static magnetic characteristics, mass of iron core, normal dynamic, and fault-tolerant performances. It is shown that the double-coil MSRM appears to have better characteristics such as higher torque production capability, lower torque ripple and cost, higher torque and output power densities, and higher reliability and fault tolerance. For experimental verification, laboratory testing of a doublecoil MSRM is developed, and the simulated and measured static inductance characteristics and dynamic performances correlate well.

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Improvement of efficiency by stepped-skewing rotor for switched reluctance motors

Cited by 13 publications

References 10 publications

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

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

Comparison of winding configurations in double‐stator switched reluctance machines

Analysis and Development of Novel Three-Phase Hybrid Magnetic Paths Switched Reluctance Motors Using Modular and Segmental Structures for EV Applications

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