Asymmetrical V-Shape Rotor Configuration of an Interior Permanent Magnet Machine for Improving Torque Characteristics

Ren, Wu; Xu, Qiang; Li, Qiong

doi:10.1109/tmag.2015.2450931

Cited by 40 publications

(12 citation statements)

References 9 publications

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“…In literature, this approach was mostly used for electrical machine design with two single responses. Several cases were presented where average torque was maximised (or maintained) while minimising torque ripple [8,21,22,26,58,75], cogging torque/force [9,14,34,48,85] or harmonic components in the machine [47,49,73,74]. Hwang et al applied this approach to maximise efficiency while minimising torque ripple [23,52] or cogging torque [24][25][26] while Zhu et al used the same approach for structural design [20].…”

Section: Multiple Single-responsementioning

confidence: 99%

Taguchi Method in Electrical Machine Design

Sorgdrager¹,

Grobler²,

Wang³

2017

SAIEE Afr. Res. J.

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There has been a considerable amount of research work on using the Taguchi method for electrical machine design in recent years. However, for the large community of electrical machine designers, this method is still less known. The purpose of this paper is to summarise the past and current research work of applying the Taguchi method in electrical machine designs. We attempt to give readers some insight into the advantages and disadvantages, challenges, current status and future perspective of the method.

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Section: Multiple Single-responsementioning

confidence: 99%

Taguchi Method in Electrical Machine Design

Sorgdrager¹,

Grobler²,

Wang³

2017

SAIEE Afr. Res. J.

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“…However, the optimal value obtained by this method can only be a combination of the levels used in the experiment, and the optimal result has certain limitations. A genetic algorithm is used to optimize the structural parameters of the interior asymmetric V type magnetic pole, which reduces the torque ripple of the motor [12]. However, the genetic algorithm can easily fall into the extreme point near the optimal solution in the later stage of calculation, so the results obtained by this method tend to approach the optimal solution rather than the optimal value.…”

Section: Introductionmentioning

confidence: 99%

A Novel Surface Inset Permanent Magnet Synchronous Motor for Electric Vehicles

Yang

et al. 2020

Symmetry

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Aiming to successfully meet the requirements of a large output torque and a wide range of flux weakening speed expansion in permanent magnet synchronous motors (PMSM) for electric vehicles, a novel surface insert permanent magnet synchronous motor (SIPMSM) is developed. The method of notching auxiliary slots between the magnetic poles in the rotor and unequal thickness magnetic poles is proposed to improve the performance of the motor. By analyzing the magnetic circuit characteristics of the novel SIPMSM, the notching auxiliary slots between the adjacent magnetic poles can affect the q-axis inductance, and the shape of magnetic pole effects the d-axis inductance of the motor. The combined action of the two factors not only weakens the cogging torque, but also improves the flux weakening capability of the motor. In this paper, the response surface methodology (RSM) is used to establish a mathematical model of the relationship between the structural parameters of the motor and the optimization objectives, and the optimal design of the motor is completed by solving the mathematical model. Experimental validation has been conducted to show the correctness and effectiveness of the proposed SIPMSM.

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“…These are in fact widely adopted traditional methods, which lead to an increase of the manufacturing cost/time and the decrease of the average output torque. In order to reduce the torque ripple without detriment to the average output torque, an asymmetrical V‐shape rotor configuration of an IPMSM is presented in [14]. This is proven to be an effective way to reduce the torque ripple albeit there exists a limitation to single rotation direction (i.e.…”

Section: Introductionmentioning

confidence: 99%

Improved V‐shaped interior permanent magnet rotor topology with inward‐extended bridges for reduced torque ripple

Gao

Sun

Gerada

et al. 2020

IET Electric Power Applications

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Interior permanent magnet synchronous machines (IPMSMs) with V‐shaped permanent magnet (PM) rotors are widely used as traction motors in electric vehicles because of their high torque density and high efficiency. However, the V‐shape IPMSMs have the disadvantages of inevitable torque ripple due to the non‐sinusoidal air‐gap flux density distribution and the utilisation of the reluctance torque. In this study, with the aim of improving the torque ripple characteristics, a modified V‐shaped IPMSM rotor configuration with bridges extended inwards towards the pole centre is proposed to generate a more sinusoidal air‐gap flux density waveform. The proposed topology, referred to as ‘Type C’ within this study, is compared with baseline rotor configuration references, namely ‘Type A’ which is a conventional V‐shaped PM rotor, as well as ‘Type B’ which is a related configuration with a mechanically non‐uniform air gap. The analysis results show that the rotor ‘Type C’ exhibits significant advantages in terms of reducing cogging torque, torque ripple and radial force, without incurring additional air‐gap friction losses. Finally, a prototype of the IPMSM with the proposed rotor configuration is manufactured and tested, verifying the predicted benefits experimentally.

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Asymmetrical V-Shape Rotor Configuration of an Interior Permanent Magnet Machine for Improving Torque Characteristics

Cited by 40 publications

References 9 publications

Taguchi Method in Electrical Machine Design

Taguchi Method in Electrical Machine Design

A Novel Surface Inset Permanent Magnet Synchronous Motor for Electric Vehicles

Improved V‐shaped interior permanent magnet rotor topology with inward‐extended bridges for reduced torque ripple

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