Modified Unipolar Hybrid Permanent Magnet Vernier Machine Using Halbach Array Configuration

Adnani, Kambiz; Shafiei, Sadjad; Millimonfared, Jafar; Moghani, Javad Shokrollahi

doi:10.1109/pedstc.2019.8697690

Cited by 8 publications

(1 citation statement)

References 9 publications

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“…Ref. [17] also uses concentrated windings and puts Halbach array magnets in the stator and consequent pole magnets in the rotor. However, the model with Halbach array does not show a significant increase in torque density or power factor.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Vernier Machines with Halbach Array Permanent Magnets for Direct Drive Applications

2023

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This paper investigates the performance enhancements of permanent magnet Vernier machines (PMVMs) that can be achieved using a new structure of Halbach array permanent magnets (HAPMs) for a direct-drive motorcycle application. To start with, size and design specifications of the electric machine are determined based on the assumed acceleration and drive cycle performance of a motorcycle. Then, five-segment Halbach array permanent magnet Vernier machines (HAPMVMs) with two different slot/pole combinations (24 s/44 p and 12 s/20 p) are suggested and optimized to achieve a high torque density with an acceptable power factor while maintaining a low torque ripple. Two selected designs from optimizations are investigated in the full speed range considering power factor and efficiency maps. Consequently, in order to demonstrate the effectiveness of the proposed five-HAPM structure, the same optimization methods are repeated with three-segment HAPMs as well as with single-piece PMs. The comparisons show a great enhancement in torque and power factor achieved with the use of five HAPMs. For instance, for 22 s/44 p topology, generated torque doubles with the use of five-segment PMs compared to single-segment PMs. Finally, the harmonics of magnetic flux density in the airgap of PMVMs and HAPMVMs are compared and investigated to reveal the reasons behind the superiority of VMs with HAPMs.

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Section: Introductionmentioning

confidence: 99%

High-Performance Vernier Machines with Halbach Array Permanent Magnets for Direct Drive Applications

2023

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Permanent Magnet Vernier Machines for Direct-Drive Offshore Wind Power: Benefits and Challenges

Padinharu

Zhu

et al. 2022

IEEE Access

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Permanent magnet Vernier (PM-V) machines, at low power levels (few kWs), have shown a great potential to improve the torque density of existing direct-drive PM machines without much compromising on efficiency or making the machine structure more complicated. An improved torque density is very desirable for offshore wind power applications where the size of the direct-drive machine is an increasing concern. However, the relatively poor power factors of the PM-V machines will increase the power converter rating and hence cost. The objective of this paper is to review the benefits and challenges of PM-V machines for direct-drive offshore wind power applications. The review has been presented considering the system-level (direct-drive generator + converter) performance comparison between the surface-mounted permanent magnet Vernier (SPM-V) machines and the conventional SPM machines. It includes the indepth discussion on the challenges facing the PM-V machines when they are scaled up for multi-MW offshore wind power application. Other PM-V topologies discussed in literature have also been reviewed to asses their suitability for offshore wind power application.

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Multi Objective Optimization Design of Unequal Halbach Array Permanent Magnet Vernier Motor Based on Optimization Algorithm

Chen

Fan

Lei

et al. 2021

2021 IEEE Energy Conversion Congress and Exposition (ECCE)

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Modified Unipolar Hybrid Permanent Magnet Vernier Machine Using Halbach Array Configuration

Cited by 8 publications

References 9 publications

High-Performance Vernier Machines with Halbach Array Permanent Magnets for Direct Drive Applications

High-Performance Vernier Machines with Halbach Array Permanent Magnets for Direct Drive Applications

Permanent Magnet Vernier Machines for Direct-Drive Offshore Wind Power: Benefits and Challenges

Multi Objective Optimization Design of Unequal Halbach Array Permanent Magnet Vernier Motor Based on Optimization Algorithm

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