Fractional Slot Concentrated Winding PMSM With Consequent Pole Rotor for a Low-Speed Direct Drive: Reduction of Rare Earth Permanent Magnet

Chung, Shi-Uk; Kim, Ji‐Won; Chun, Yon‐Do; Woo, Byung-Chul; Hong, Do-Kwan

doi:10.1109/tec.2014.2352365

Cited by 155 publications

(70 citation statements)

References 13 publications

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“…However, there are a couple of things that this topology contributes to. The previous research revealed that this particular topology can save up to 33% of PM material with almost equivalent performance in continuous operation [30]. In other words, this topology can serve as a cost-effective solution when considering manufacturing.…”

mentioning

confidence: 88%

Development of a 20-Pole–24-Slot SPMSM With Consequent Pole Rotor for In-Wheel Direct Drive

Chung

Moon

Kim

et al. 2016

IEEE Trans. Ind. Electron.

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155

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In-wheel motors bring a fundamental change in electric vehicle technology by removing conventional mechanical components and freeing up space inside the vehicle body. This approach ultimately helps to realize all-wheel independent control for improved vehicle dynamics and increased vehicle design freedom. However, when space allowed for an in-wheel motor is taken into consideration, high torque density, high efficiency, and wide speed range capability are typically required. This paper specifically investigates a 20pole-24slot surface permanent magnet synchronous motor (SPMSM) with consequent pole (CP) rotor for in-wheel direct drive since this topology is well suited for high pole motors and thus high torque direct drive applications. Extensive finite element analysis (FEA) is carried out to characterize the proposed motor and the practical feasibility of the proposed motor is discussed. Finally, the validity of the analysis was experimentally verified.Index Terms-Consequent pole (CP), fractional slot, direct drive, outer rotor, finite element analysis (FEA), surface permanent magnet synchronous motor (SPMSM), in-wheel drive.

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mentioning

confidence: 88%

Development of a 20-Pole–24-Slot SPMSM With Consequent Pole Rotor for In-Wheel Direct Drive

Chung

Moon

Kim

et al. 2016

IEEE Trans. Ind. Electron.

Self Cite

155

View full text Add to dashboard Cite

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“…A 44pole-48slot fractional-slot concentrated-winding (FSCW) PM machine with the CP rotor is designed by response surface methodology and a prototype of 20pole -24slot FSCW PM machine with the CP rotor is tested. 9,10 However, fine design and comprehensive performance analysis still need to improve. The paper mainly focuses on the optimal combination rule of PM pole and iron-core pole in traditional PM machine, and comprehensive performance evaluation, including electromagnetic performance, anti-demagnetization capacity and cost.…”

Section: Introductionmentioning

confidence: 99%

Investigation of a less rare-earth permanent-magnet machine with the consequent pole rotor

et al. 2018

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Minimization of torque ripple in ferrite-assisted synchronous reluctance motors by using asymmetric stator AIP Advances 8, 056606 (2018) Due to the rising price of rare-earth materials, permanent-magnet (PM) machines in different applications have a trend of reducing the use of rare-earth materials. Since iron-core poles replace half of PM poles in the consequent pole (CP) rotor, the PM machine with CP rotor can be a promising candidate for less rare-earth PM machine. Additionally, the investigation of CP rotor in special electrical machines, like hybrid excitation permanent-magnet PM machine, bearingless motor, etc., has verified the application feasibility of CP rotor. Therefore, this paper focuses on design and performance of PM machines when traditional PM machine uses the CP rotor. In the CP rotor, all the PMs are of the same polarity and they are inserted into the rotor core. Since the fundamental PM flux density depends on the ratio of PM pole to iron-core pole, the combination rule between them is investigated by analytical and finite-element methods. On this basis, to comprehensively analyze and evaluate PM machine with CP rotor, four typical schemes, i.e., integerslot machines with CP rotor and surface-mounted PM (SPM) rotor, fractional-slot machines with CP rotor and SPM rotor, are designed to investigate the performance of PM machine with CP rotor, including electromagnetic performance, antidemagnetization capacity and cost. © 2017 Author (s)

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“…The permanent magnet synchronous motors (PMSMs) have found an increasingly wide utilization in many industrial applications for their high efficiency, high torqueto-current ratio, simple mechanical construction, easy maintenance, and so forth [1][2]. Among the various control strategies applied to PMSM, field-oriented control (FOC) and direct torque control (DTC) are the two most popular methods for high performance motor drive.…”

Section: Introductionmentioning

confidence: 99%

Direct Stator Flux Vector Control Strategy for IPMSM using a Full-order State Observer

Yuan¹,

Zeng²,

Zhao³

2017

Journal of Electrical Engineering and Technology

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-A direct stator flux vector control scheme in discrete-time domain is proposed in this paper for the interior permanent magnet synchronous motor (IPMSM) drive to remove the proportional-integral (PI) controller from the direct torque control (DTC) scheme applied to IPMSM and to obtain faster dynamic response and lower torque ripple output. The output of speed outer loop is used as the desired torque angle instead of the desired torque in the proposed scheme. The desired stator flux vector in dq coordinate is calculated with a given amplitude. The state-space equations in discrete-time for IPMSM are established, the actual stator flux vector is estimated in deadbeat manner by a full-order state observer, and then the closed-loop control is achieved by the pole placement. The stator flux error vector is utilized to calculate the reference stator voltage vector. Extracting the angle position and amplitude from the estimated stator flux vector and estimating the output torque are eliminated for the direct feedback control of the stator flux vector. The proposed scheme is comparatively investigated with a PI-SVM DTC scheme by experiment results. Experimental results show the feasibility and advantages of the proposed control scheme.

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Fractional Slot Concentrated Winding PMSM With Consequent Pole Rotor for a Low-Speed Direct Drive: Reduction of Rare Earth Permanent Magnet

Cited by 155 publications

References 13 publications

Development of a 20-Pole–24-Slot SPMSM With Consequent Pole Rotor for In-Wheel Direct Drive

Development of a 20-Pole–24-Slot SPMSM With Consequent Pole Rotor for In-Wheel Direct Drive

Investigation of a less rare-earth permanent-magnet machine with the consequent pole rotor

Direct Stator Flux Vector Control Strategy for IPMSM using a Full-order State Observer

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