A Novel Parallel Hybrid Excitation Field Modulated Machine With Efficient Utilization of Multiworking Harmonics

Jiang, Tingting; Zhao, Wenxiang; Xu, Liang; Ji, Jinghua

doi:10.1109/tie.2021.3063991

Cited by 9 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the development of industrial technology, high-torque electrical machines attract more and more attention in direct drive applications [1][2][3][4]. The conventional electrical machine drive system includes a machine and a gearbox.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a High Torque Density Hybrid Permanent Magnet Excited Vernier Machine

Kang

Xu²,

Ji³

et al. 2022

Energies

Self Cite

View full text Add to dashboard Cite

Permanent magnet (PM) excited vernier machines capable of high torque density have good potential for electric vehicles while requiring high rare earth PM consumption. To achieve a high torque density at a reasonable material cost, hybrid PM excited vernier machines incorporating both expensive rare earth and low-cost ferrite magnets are investigated in this paper. Various combinations of PM arrangements for the hybrid permanent magnet excited vernier machine are investigated to acquire low cost and superior torque density. The best solution obtained is that the PM on the stator adopts rare earth material while the rotor uses ferrite. Furthermore, the PMs on the stator are arranged in an iron-cored Halbach array, which can reduce leakage flux and enhance flux density effectively and the ferrite PMs are used in the rotor, therefore, high-temperature demagnetization is avoided. Then, the reluctance torque and the cogging torque can offset each other effectively, which is beneficial to reducing the torque ripple and smoothing the electromagnetic torque. Finally, a prototype is manufactured and tested to verify the correctness of the theoretical analysis.

show abstract

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a High Torque Density Hybrid Permanent Magnet Excited Vernier Machine

Kang

Xu²,

Ji³

et al. 2022

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

“…Owing to the merits of high efficiency and torque, the permanent magnet (PM) machine has been widely researched and applied in a lot of fields [1][2][3][4][5][6]. In order to achieve the requirement of a high torque at a low machine size, various high torque density PM machines have been proposed at present, in which a permanent magnet vernier machine (PMVM) as a relatively new machine topology has attracted wide attention because of the characteristics of a simple structure and high torque density [7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Design, Analysis, and Optimization of Permanent Magnet Vernier Machines Considering Rotor Losses

2022

Energies

Self Cite

View full text Add to dashboard Cite

The purpose of this paper is the design, analysis, and optimization of a new structure of a permanent magnet vernier machine (PMVM) with a high torque density and low rotor losses. First, the modulation principle and topology of this PMVM is introduced. Then, its average torque and rotor loss are enhanced and reduced by optimizing the flux modulation poles distribution. For the sake of further reducing the rotor losses on the premise of maintaining the torque density, the contribution of the air gap flux density harmonics to the rotor loss is analyzed. Then, a new topological structure of a rotor with a flux barrier is introduced to reduce the rotor losses due to the decrease of each harmful harmonic. Through the analysis of the structure of the PMVM with the flux barrier, the influence of the parameters on the performance is built. After that, a multi-objective optimization algorithm is used to optimize the PMVM so as to obtain the optimal performance. Moreover, the electromagnetic performance comparison between the newly proposed machine and the original one is presented to indicate that lower rotor losses can be obtained by the proposed machine when the torque is ensured. Finally, a prototype of proposed PMVM is built and further tested to verify the validities of the theoretical and finite-element analyses.

show abstract

“…However, as rare earth prices have risen in recent years, cost is one of its main drawbacks. Therefore, many scholars have made efforts to develop PMVM with little or no rare earth PMs [14]- [24]. For example, ferrite PMs are used to replace rare earth PMs in the PM machines [14]- [17].…”

mentioning

confidence: 99%

“…For example, ferrite PMs are used to replace rare earth PMs in the PM machines [14]- [17]. Also, switched reluctance machine [18]- [20] and hybrid excitation machine [21]- [24] are widely investigated. While reducing the cost of the machines, it also reduces the electromagnetic performance of the machines, such as torque density.…”

mentioning

confidence: 99%

Reduction of Unipolar Leakage Flux and Torque Ripple in Consequent-pole PM Vernier Machine

Zhao

et al. 2023

Trans. Electr. Mach. Syst.

View full text Add to dashboard Cite

This paper proposes a new consequent-pole permanent magnet vernier machine (CPMVM), which can be regarded as a combination of two conventional CPMVM with opposite polarities. Based on the simplified axial magnetic circuit model, it is verified that the proposed CPMVM can reduce the unipolar leakage flux. In order to reduce the torque ripple of machine and improve the output torque of machine, the flux barrier is placed on the rotor of the proposed machine. Then, the parameters of the proposed CPMVM are optimized and determined. Moreover, the electromagnetic performance, including no-load air-gap flux density, average torque and torque ripple, flux linkage, back-electromotive force, cogging torque, average torque, torque ripple, power factor and loss, is compared with conventional surface-mounted permanent magnet vernier machine (SPMVM) and CPMVM. Finally, it is demonstrated that proposed CPMVM with flux barrier can effectively reduce the unipolar leakage flux and greatly reduce the torque ripple of machine. Also, compared with the SPMVM, the proposed CPMVM with flux barrier saves more than 45% of the permanent magnet material without reducing output torque.

show abstract

A Novel Parallel Hybrid Excitation Field Modulated Machine With Efficient Utilization of Multiworking Harmonics

Cited by 9 publications

References 23 publications

Design and Analysis of a High Torque Density Hybrid Permanent Magnet Excited Vernier Machine

Design and Analysis of a High Torque Density Hybrid Permanent Magnet Excited Vernier Machine

Design, Analysis, and Optimization of Permanent Magnet Vernier Machines Considering Rotor Losses

Reduction of Unipolar Leakage Flux and Torque Ripple in Consequent-pole PM Vernier Machine

Contact Info

Product

Resources

About