A Study on the Maximum Flux Linkage and the Goodness Factor for the Spoke-Type PMSM

Lee, Sung Gu; Bae, Jae-Nam; Kim, Won‐Ho

doi:10.1109/tasc.2017.2775561

Cited by 24 publications

(14 citation statements)

References 5 publications

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“…as the sum of the phase currents i 1 , i 2 and i 3 equals zero at every point in time. Equation (8) shows that a time-varying zero-sequence flux linkage component leads to a voltage different from zero at the star-point connector towards ground. If parasitic capacities are small enough, a zero-sequence voltage component does not lead to a ZSCC or to additional magnetic fields.…”

Section: Theorymentioning

confidence: 99%

“…The number of parallel paths per phase is two. The magnet arrangement in the 14-pole spoke-type rotor results in a flux-concentration and therefore leads to an increased air-gap flux density compared to surface-mounted PMSMs [8]. The rotor poles are shaped such that the torque ripple, cogging torque and harmonics within the electromotive force (EMF) are reduced [9].…”

Section: A Machine Under Studymentioning

confidence: 99%

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Loss Comparison of Small Delta- and Star-Connected Permanent Magnet Synchronous Machines

Rehm

Breining

Decker

et al. 2019

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society

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Delta-connected stator windings are often used in mass production of small Permanent Magnet Synchronous Machines (PMSMs). In comparison to star-connected stator windings, a delta-connected winding system offers advantages for manufacturing and lowers production costs. A main disadvantage of motors with such a winding system are additional losses caused by the Zero-Sequence Current Component (ZSCC). In this paper the ZSCC and its impact on the generated losses in a deltaconnected PMSM used as a traction motor for a pedal electric cycle (Pedelec) is analysed. The calculated results are compared to those of a star-connected PMSM with the same design. We will show that the amplitude of the ZSCC depends on the operating point of the machine. As a result, the copper losses in the deltaconnected machine are up to 5.8 % higher than the ones in the star-connected machine. On the other hand, the iron losses are 1 % smaller in the delta-connected machine. The efficiency of the delta-connected machine is still up to 4 % smaller.

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Section: Theorymentioning

confidence: 99%

Section: A Machine Under Studymentioning

confidence: 99%

Loss Comparison of Small Delta- and Star-Connected Permanent Magnet Synchronous Machines

Rehm

Breining

Decker

et al. 2019

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society

View full text Add to dashboard Cite

show abstract

“…However, the rare earth used in the core parts of high-performance electric motors has large price fluctuations, and stable supply and demand are difficult because the reserves of resources are concentrated in several countries [1,2]. Therefore, pieces of research on motors that do not use rare earth have been actively conducted in recent years [3][4][5][6][7][8][9][10][11][12].…”

Section: Introduction 1background Of Studymentioning

confidence: 99%

“…Spoketype PMSM is an electric motor that can concentrate flux by arranging permanent magnets facing each other in the radial direction. This structure creates a high airgap flux density because the fluxes from the two permanent magnets overlap each other and are directed to the airgap [10][11][12]. Therefore, ferrite PM, which is inexpensive, can perform similarly to a permanent magnet motor using rare earth.…”

Section: Introduction 1background Of Studymentioning

confidence: 99%

A Study on the Shape of the Rotor to Improve the Performance of the Spoke-Type Permanent Magnet Synchronous Motor

et al. 2021

Self Cite

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This paper describes a study on the improvement of the dehydration performance of the conventional washing machine model. Recently, as interest in improving the dehydration performance of washing machines has increased, the need for a study on a high-speed electric motor has emerged. However, this conventional spoke-type PMSM has difficulty in speeding up due to the following problems. First, field weakening control is indispensable for high-speed operation of an electric motor. This control method is a big problem in causing torque drop and irreversible demagnetization of the motor. Moreover, the centrifugal force increases during high-speed operation, which adversely affects the stiffness of the motor. Therefore, in this paper, a new rotor shape of spoke-type PMSM was proposed to solve the above problem.

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“…Usually, analytical models are utilized to formulate dimensional goodness factors for design evaluations [4]. This paper combines an analytical model along with a finite element (FE) based model for both the thermal and magnetic aspects of the SPM machine.…”

Section: Introductionmentioning

confidence: 99%

Maximum Torque Density Limit for Surface-Cooled SPM Machines

Bocchese

Nøland

Noddeland

et al. 2020

2020 International Conference on Electrical Machines (ICEM)

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The aim of this work is to find the maximum torque density limit of a surface cooled SPM machine. In this paper, an analytical and a FEM-based model are developed under some theoretical conditions. Both models consist of a magnetic and a thermal part, where they are used to calculate the torque and the temperature distribution, respectively. Each model is then combined with an optimization process in order to maximize the torque density. The analytical model utilizes the GlobalSearch algorithm (GSA), while the FEM-based one uses the Pattern-Search (PS) approach. A case configuration is selected, and the results between the two models are presented and compared. It is shown that it is possible to determine a maximum limit for the torque density of a machine and the configuration used to get it. A parametric sensitivity analysis is carried out to analyze the influence of some typical parameters on the maximum torque density. Finally, this maximum limit is compared against typical SPMs.

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A Study on the Maximum Flux Linkage and the Goodness Factor for the Spoke-Type PMSM

Cited by 24 publications

References 5 publications

Loss Comparison of Small Delta- and Star-Connected Permanent Magnet Synchronous Machines

Loss Comparison of Small Delta- and Star-Connected Permanent Magnet Synchronous Machines

A Study on the Shape of the Rotor to Improve the Performance of the Spoke-Type Permanent Magnet Synchronous Motor

Maximum Torque Density Limit for Surface-Cooled SPM Machines

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