Research on Segmented Primary Consequent-Pole Permanent Magnet Linear Synchronous Motor with Symmetric and Periodic End Force

Li, Jing; Huang, Xuzhen; Zhang, Bo; Wang, Zheng

doi:10.3390/sym13122374

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…Thus the second formula is added as a further constraint. Meanwhile, considering that the formula of the induced voltage is u = L(di/dt), that is, the induced voltage is proportional to the first power of the inductance, so the decoupling effect is the best when n = 1 in (7).…”

Section: Orientation Of the Inductancementioning

confidence: 99%

“…It is worth mentioning that in (7), due to the symmetry of the magnetic circuit, there are four θ L that satisfy the first equation. Thus the second formula is added as a further constraint.…”

Section: Orientation Of the Inductancementioning

confidence: 99%

“…[1-4] Most permanent magnet motors use high-performance rare earth permanent magnet materials [5]. However, the issues, such as the outbreak of the epidemic, have caused a shortage and price increase in rare-earth permanent magnet materials, which brings challenges to the application of mass production [6,7]. To solve this problem, people are constantly looking for alternatives.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimal Design and Control of a Spoke-Type IPM Motor with Asymmetric Flux Barriers to Improve Torque Density

Zhao

Zhu

et al. 2022

Symmetry

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This paper studies the optimal design and control scheme of a spoke-type interior permanent magnet motor (SIPM). An asymmetric rotor structure with flux barriers is designed to improve the torque density of SIPM. The design method improves the torque density by approximating the maximum value of the magnetic torque and the reluctance torque, wherein the torque components are separated by the frozen permeability method (FPM) to evaluate the contribution. This scheme does not increase the amount of permanent magnets or the motor size, and reduces motor weight while increasing motor torque output. Firstly, the asymmetric flux barriers are applied in a 27/4 SIPM to illustrate the design principle. Further, by optimizing the width of flux barriers, based on finite-element analyze (FEA), a higher torque density is obtained. Compared with the basic model, the output torque and the torque density of the optimal model are both increased. Based on the optimal model, an angle scanning method is proposed to orient the flux vector and dq-axis. Then, the mathematical model of the optimal model is established, and the maximum torque per ampere (MTPA) control system is designed. Compared with the conventional control system, the proposed control system has a higher torque per ampere (TPA), which shows that the designed control system can give full play to the advantages of the high torque density.

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Section: Orientation Of the Inductancementioning

confidence: 99%

Section: Orientation Of the Inductancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimal Design and Control of a Spoke-Type IPM Motor with Asymmetric Flux Barriers to Improve Torque Density

Zhao

Zhu

et al. 2022

Symmetry

View full text Add to dashboard Cite

show abstract

Optimization Design of Novel Consequent Pole Motor for Electric Power Steering System

Jo,

Baek,

Hwang

2024

Machines

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This paper proposes a novel consequent pole machine (CPM) to improve cogging torque, torque ripple, and torque per magnet volume compared to a conventional CPM. The proposed structure consists of a consequent pole rotor that reduces permanent magnet (PM) material. Different from conventional surface permanent magnet machines (SPMs) and conventional CPMs, the proposed CPM has an additional iron pole (AIP) extension under the magnet. This structure is suggested in order to increase the magnet pole angle while maintaining the magnet volume by partially substituting the magnet with iron. The design of the proposed machine was optimized to achieve higher torque and lower torque ripple. Comparisons of the proposed CPM with a conventional SPM and CPM were conducted to show the superiority of the proposed CPM utilizing AIP. The results showed that the proposed CPM exhibits 68% lower cogging torque, 75% lower torque ripple, and 16% higher torque per magnet volume with the same magnet volume compared with the conventional CPM.

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Accurate Analytical Models of Armature Reaction Field for Multi-Segment Primaries Ironless PMLSM Based on Subdomain Method

Zhang

Yin²,

Li³

2022

Symmetry

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Multi-segment-primary (MSP) ironless Permanent Magnet Linear Synchronous Machine (PMLSM) can be widely applied in long primary, long stroke, and heavy load applications. Therefore, an accurate armature reaction field analysis is very important to control this novel topology motor. In order to simplify the research process, a two-segment-primary (TSP) ironless PMLSM in this article was proposed as the smallest unit. The analytical models of the armature reaction field of the motor based on the subdomain method (SDM) were established considering the finite length of the segment-primary (SP) and the interval distance between the TSP. Then, the coupling effect between the TSP and the end effect of the TSP on the armature reaction field were quantitatively analyzed. Furthermore, the coupling inductance between the TSP can be analytically calculated, which is influenced by the coupling effect. To validate the effectiveness of the proposed models, a prototype of the 24s/28p TSP ironless PMLSM was manufactured and tested. It was shown that the proposed models match well with the simulated and experimental results. As well, the maximum variation rate of the end coupling inductance was about 50.13%.

show abstract

Research on Segmented Primary Consequent-Pole Permanent Magnet Linear Synchronous Motor with Symmetric and Periodic End Force

Cited by 3 publications

References 23 publications

Optimal Design and Control of a Spoke-Type IPM Motor with Asymmetric Flux Barriers to Improve Torque Density

Optimal Design and Control of a Spoke-Type IPM Motor with Asymmetric Flux Barriers to Improve Torque Density

Optimization Design of Novel Consequent Pole Motor for Electric Power Steering System

Accurate Analytical Models of Armature Reaction Field for Multi-Segment Primaries Ironless PMLSM Based on Subdomain Method

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