Investigation of an Asymmetrical Rotor Hybrid Permanent Magnet Motor for Approaching Maximum Output Torque

Zeng, Xianxian; Quan, Li; Xu, Lei; Liu, Fang-jie

doi:10.1109/tasc.2019.2893708

Cited by 30 publications

(10 citation statements)

References 9 publications

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“…In this proposed work an improved dynamic strategy on a PMSM drive is executed and optimized to illustrate the better dynamic and steady-state performance characteristics [11], [12]. While appraising the above discussion the main contributions are listed in the following way:…”

Section: Introductionmentioning

confidence: 99%

Self-Controlled PMSM Drive Employed in Light Electric Vehicle-Dynamic Strategy and Performance Optimization

Sain¹,

Biswas⃰

Satpathy

et al. 2021

IEEE Access

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This proposed work demonstrates the illustration of dynamic performance intensification of a Permanent Magnet Synchronous Motor (PMSM) employed by a PWM controlled inverter which synchronizes with the rotor movement intimation. PMSM are widely hired in electric vehicles since it possesses better dynamic response, improved torque-speed property, and reduced noise, energy-efficient and power factor in comparison with traditional motors. In the present work, it is observed that by few modifications of the position control strategy as good as sinusoidal stator currents response generates less torque ripples. The mathematical model for PMSM is derived from park's transformation. Further, a maiden attempt is taken to introduce the performance indicator 'sensor angle' to estimate the rotor position in this strategy. From the established model, the various dynamic behavior of the drive system is determined analytically without and under various load disturbances. Additionally, a particle swarm optimization (PSO) technique is adopted to optimize the performance of the proposed dynamic strategy. An efficient speed control strategy by the variation of DC bus voltage is achieved which is equivalent to the armature voltage control of the conventional dc machine. Further, efficient and simple control circuitry of the voltage source inverter (VSI) is obtained in this strategy. To verify the efficacy of the proposed algorithm, necessary tests are carried out in a real-time setup. Therefore, an improved control strategy obtained from the simulation and an experimental approach meets the dynamic behavior employed in light weight electric vehicles.

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Section: Introductionmentioning

confidence: 99%

Self-Controlled PMSM Drive Employed in Light Electric Vehicle-Dynamic Strategy and Performance Optimization

Sain¹,

Biswas⃰

Satpathy

et al. 2021

IEEE Access

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show abstract

“…A new asymmetrical rotor hybrid CW PMSM with enhanced torque performance was presented in [12]. It was proposed to modify the rotor structure of a conventional symmetrical rotor hybrid spoke-type PM motor by asymmetric positioning of the upper part of the PMs to improve torque production.…”

Section: Permanent Magnet Synchronous Machines Provide Certain Advantages Over Other Traditional Machines Because Of Theirmentioning

confidence: 99%

Analysis of a Tooth-Coil Winding Permanent-Magnet Synchronous Machine With an Unequal Teeth Width

et al. 2020

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This paper presents an analysis of a permanent magnet synchronous machine (PMSM) with an unequal teeth width. The use of the concentrated nonoverlapping winding, also known as tooth-coil winding, has certain advantages. In addition, asymmetric features can be exploited by adopting this winding configuration to improve the machine performance. The procedure involves increasing the stator tooth width and, to the same extent, reducing the adjacent stator tooth width. In this paper, an analytical method was employed to predict and understand the back-EMF behavior, and a finite element analysis (FEA) was performed to verify the analytical method. Furthermore, a detailed study of the machine performance (electromagnetic torque, flux density, and losses) was carried out by the FEA. The machine was built and tested to validate the performance of the machine. INDEX TERMSAnalytical analysis, asymmetrical stator, finite element analysis, permanent magnet, permanent magnet machine, tooth-coil winding. NOMENCLATURE α Mechanical position. β Electrical position. Mechanical angular speed. 2p Number of poles. Q s Number of slots. v, v 1 , v 2 -th harmonic number. q Number of slots per pole and phase. CT Goodness factor (related to cogging torque). GCD Greatest common divisor. LCM Least common multiple.

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“…Consequently, researchers face a great challenge to produce ferrite PM motors with high torque density, improved magnetic flux weakening, and improved demagnetisation. To reduce the consumption of rare-earth materials while maintaining high torque density, a hybrid configuration is often applied to PM motors, in which two types of magnets are used together [13][14][15][16][17][18][19][20]. The use and placement of two different types of PM can significantly affect the electromagnetic performance of a motor.…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of a novel spoke‐type motor to reduce the use of rare‐earth magnet materials

Seok

Choi

Seo

2021

IET Electric Power Appl

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In this study, a novel design for a tilted spoke-type hybrid permanent magnet synchronous motor (TH-PMSM) that uses two types of permanent magnet (PM) materials is proposed to reduce the consumption of rare-earth PM materials. The key feature of this motor is securing space by tilting the permanent magnet, so that more PMs can be used in the limited rotor space. In addition, based on the centre axis of the rotor, the rare-earth magnets are positioned deeper inside than ferrite PMs to maximise the torque density and reduce the leakage magnetic flux that occurs around the centre of the rotor. Moreover, unlike ordinary spoke-type rotors, it is designed with an integral core like the rotor of the interior permanent magnet synchronous motor (IPMSM), so it is structurally safe even at high speeds. To ensure that the proposed motor is efficiently designed, the output torque, PM cost, cogging torque, and torque ripple were compared with those of the conventional rare-earth PM motors with the same overall dimensions. The validity of the proposed motor was verified by the results of a finite element method simulation and experiments on the fabricated motor.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Investigation of an Asymmetrical Rotor Hybrid Permanent Magnet Motor for Approaching Maximum Output Torque

Cited by 30 publications

References 9 publications

Self-Controlled PMSM Drive Employed in Light Electric Vehicle-Dynamic Strategy and Performance Optimization

Self-Controlled PMSM Drive Employed in Light Electric Vehicle-Dynamic Strategy and Performance Optimization

Analysis of a Tooth-Coil Winding Permanent-Magnet Synchronous Machine With an Unequal Teeth Width

Design and analysis of a novel spoke‐type motor to reduce the use of rare‐earth magnet materials

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