Investigation of Hybrid-Magnet-Circuit Variable Flux Memory Machines With Different Hybrid Magnet Configurations

Yang, Hui; Zheng, Hao; Lin, Heyun; Zhu, Z. Q.; Fu, Weinong; Liu, Wei; Lei, Jiaxing; Lyu, Shukang

doi:10.1109/tia.2020.3033836

Cited by 25 publications

(3 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To have a stable operation of the LCF magnet and excellent flux regulation ability, a variable-flux permanent-magnet synchronous machine with a quasi-series magnet configuration and passive flux barrier was proposed [27,28]; however, the problem of a large magnetizing current to switch from flux enhancing to weakening is yet to be resolved. Yang et al proposed a hybrid-magnet-circuit VFM [29][30][31] that combines the advantages of both types of H-VFMs mentioned above to achieve high torque density, good flux adjustment ability, and reduce magnetizing currents. However, the rotor configuration seems complex and requires more expensive HCF rare-earth magnets.…”

Section: Introductionmentioning

confidence: 99%

“…To simultaneously achieve the above-mentioned advantages, i.e., high torque density, excellent flux regulation ability, low demagnetization risk, low magnetizing impulse current demand, high efficiency at high speed, and expanded motor operating range, this paper proposes a novel VFS-PMSM topology combining HCF magnets and anisotropic LCF magnets, instead of the isotropic LCF magnet used in a previous study [32]. The method of swiveling the magnetic pole of the LCF magnet [32] is adopted, which differs from the previously mentioned methods that magnetize/demagnetize the magnets in the same axis [18][19][20][21][22][23][24][25][26][27][28][29][30][31]. It should be noted that there is a significant difference in flux generated and magnetizing field required between the easy and hard axes in the anisotropic magnets.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Swiveling Magnetization for Anisotropic Magnets for Variable Flux Spoke-Type Permanent Magnet Motor Applied to Electric Vehicles

Lee

Hsieh

2022

Energies

View full text Add to dashboard Cite

This paper investigates the application of anisotropic low-coercive force (LCF) magnets to a novel variable-flux spoke-type permanent magnet synchronous motor (VFS-PMSM) for electrical vehicles with a wide speed range. In the VFS-PMSM, flux is regulated by swiveling the magnetization of the anisotropic LCF magnets instead of directly magnetizing or demagnetizing them. The previously proposed VFS-PMSM uses only isotropic LCF magnets for easily swiveling the magnetic pole direction, resulting in lower torque density. The challenge thus lies in the feasibility to swivel the magnetic pole direction of the anisotropic LCF magnet, and the impact of the different magnetization strengths of the anisotropic magnets on the motor performance. This paper first studies the feasibility to swivel the magnetization direction of anisotropic LCF magnets through experiments. It is confirmed that the magnetization direction can be successfully swiveled by 90 degrees with a reduced external magnetizing field. Then, two VFS-PMSM topologies and various rotor configurations are compared in terms of key performance indices to determine critical sizing factors for performance enhancement. Finite element analysis is used for simulations. In comparison with the VFS-PMSM equipped with isotropic LCF magnets, the maximum torque of the proposed topology can be improved for the same flux adjustment ability. Alternatively, the flux adjustment ability can also be enhanced by 37.43% for the same maximum torque.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Swiveling Magnetization for Anisotropic Magnets for Variable Flux Spoke-Type Permanent Magnet Motor Applied to Electric Vehicles

Lee

Hsieh

2022

Energies

View full text Add to dashboard Cite

show abstract

“…Nevertheless, a large current is still needed for fluxweakening [17]. In [18], a variable flux memory motor (VFMM) is proposed. Since the low coercive-force (LCF) PM is applied in VFMM, the LCFPM magnetization strength of LCFPM can be controlled by injecting d-axis current pulses to remagnetize or demagnetize [19].…”

Section: Introductionmentioning

confidence: 99%

Multi-Objective Optimal Design of the MFW-Ipm Machine for Improve Flux-Weakening Ability

Liu¹,

Guo²,

Zhu³

et al. 2021

PIER C

View full text Add to dashboard Cite

In this paper, a novel mechanical-flux-weakening interior permanent magnet (MFW-IPM) machine is proposed to improve flux-weakening ability. The key of the proposed machine is that the permanent magnet is rotatable, and a mechanical device is equipped on both sides of the rotor. The mechanical device can regulate the air-gap magnetic field by rotating PM to change the leakage flux and magnetization direction of PM. As a result, the flux-weakening ability is improved. The flux-weakening principle of the MFW-IPM machine is investigated in detail. In addition, a multi-objective optimization method is adopted to improve the performance of the proposed machine. Then, the electromagnetic performances of the original machine and optimized machine are compared by finite element analysis. Finally, both simulation results and experimental tests verify the effectiveness of the flux-weakening enhancement design and optimization method.

show abstract

Design optimization with improved torque performance of a new flux-intensifying PMSM using multilayer barriers for solar water pumps

Kashif

Singh

2022

Engineering Science and Technology, an International Journal

View full text Add to dashboard Cite

Investigation of Hybrid-Magnet-Circuit Variable Flux Memory Machines With Different Hybrid Magnet Configurations

Cited by 25 publications

References 33 publications

Swiveling Magnetization for Anisotropic Magnets for Variable Flux Spoke-Type Permanent Magnet Motor Applied to Electric Vehicles

Swiveling Magnetization for Anisotropic Magnets for Variable Flux Spoke-Type Permanent Magnet Motor Applied to Electric Vehicles

Multi-Objective Optimal Design of the MFW-Ipm Machine for Improve Flux-Weakening Ability

Design optimization with improved torque performance of a new flux-intensifying PMSM using multilayer barriers for solar water pumps

Contact Info

Product

Resources

About