Torque characteristics analysis of dual-airgap spoke-type permanent-magnet Vernier machine considering pole ratio effect

Siddiqi, Mudassir Raza; Ullah, Zia; Hur, Jin

doi:10.1007/s00202-020-00962-3

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…Permanent Magnet Vernier machines (PMVM) have been gaining much attraction for direct drive applications due to their high torque density, low cogging torque, and excellent torque performance [5][6][7][8]. The operation principle of PMVM is generally based on the flux modulation effect, in which a small rotation of the rotor brings a huge flux change that results in high torque production [9].…”

Section: Introductionmentioning

confidence: 99%

Demagnetization Risk Assessment in a Dual Stator Permanent Magnet Vernier Machines

Ullah

Siddiqi

Ahmed

2022

2022 IEEE Energy Conversion Congress and Exposition (ECCE)

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As the topologies of permanent magnet vernier machines (PMVM) is getting more complex such as dual rotor and its variants. The thermal, mechanical, and especially demagnetization concern increasing. In this paper, the demagnetization risk evaluation of three similar topologies of dual stator radial type PMVM is presented. Three recently published topologies: dual winding with rotor-yoke, dual winding without rotor-yoke, and single winding without yoke are selected. This design highly improved the torque density and reduced the overall volume. However, the permanent magnets (PMs) in these topologies are at huge risk of irreversible demagnetization. Furthermore, the overall performance of PMtype machines is incomprehensible without a detailed demagnetization analysis. Therefore, a comprehensive mechanical, thermal, and demagnetization analysis considering various operating points and temperatures is conducted to evaluate the risk of demagnetization in these topologies. Finally, some modification are made to optimize of these designs. All analyses are carried out using finite element analysis and cosimulation in ANSYS maxwell and mechanical.

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Section: Introductionmentioning

confidence: 99%

Demagnetization Risk Assessment in a Dual Stator Permanent Magnet Vernier Machines

Ullah

Siddiqi

Ahmed

2022

2022 IEEE Energy Conversion Congress and Exposition (ECCE)

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“…Nowadays, low-speed and high-torque machines operating based on the magnetic gearing effect are increasingly used in direct drive applications such as electric vehicles, wind generation turbines, and wave energy conversions [1], [2]. Due to the flux modulation effect, the air-gap flux of these machines contains several harmonic components, which some of them produce useful torque [3]. PMVMs are one the most attractive types of the flux modulation machines because of their high efficiency and simple salient structure [4].…”

Section: Introductionmentioning

confidence: 99%

Modeling and detection of demagnetization fault in permanent magnet vernier machine using flexible magnetic equivalent circuit method

2021

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In this paper, an analytical model is proposed for evaluating electromagnetic performances of permanent magnet vernier machines (PMVMs) under healthy and faulty conditions. The proposed model employs flexible magnetic equivalent circuit (MEC) method, which its accuracy can be selected by tunable parameters. The model is capable of considering the influence of saturation effect, skewed slots, slot leakage fluxes, and various winding arrangements for the machines with desired properties. First, the proposed model is used to predict the no-load performance of machine at healthy condition. Then, the machine loading behaviors under healthy and demagnetization fault conditions are analyzed by the MEC model. Moreover, the results of the proposed model are compared and validated with those of 2D finite element method (FEM) and 3D-FEM. Eventually, a specific pattern is extracted from the stator current spectrum to detect the demagnetization fault.

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Optimization of Non-uniform Flux Modulation Poles of a Dual-Stator Permanent Magnet Vernier Machine for Performance Improvement

Park

Lukman

Kang³

et al. 2022

J. Electr. Eng. Technol.

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Torque characteristics analysis of dual-airgap spoke-type permanent-magnet Vernier machine considering pole ratio effect

Cited by 6 publications

References 10 publications

Demagnetization Risk Assessment in a Dual Stator Permanent Magnet Vernier Machines

Demagnetization Risk Assessment in a Dual Stator Permanent Magnet Vernier Machines

Modeling and detection of demagnetization fault in permanent magnet vernier machine using flexible magnetic equivalent circuit method

Optimization of Non-uniform Flux Modulation Poles of a Dual-Stator Permanent Magnet Vernier Machine for Performance Improvement

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