Comparative Study of Relieving-DC-Saturation Hybrid Excited Vernier Machine With Different Rotor Pole Designs for Wind Power Generation

A novel dual permanent magnet (PM) machine with Halbach segmentation flux modulation is proposed in this paper, which is evolved from a flux switching PM machine (FSPM). In order to improve the performance of the FSPM, several PM arrangement methods have been adopted and three new different structures have been investigated. To achieve a fair comparison, all the structures are under the same size and rotate at the same speed. The performances of output torque and back EMF are compared. The analysis results show that the dual PM with Halbach segmentation has the highest torque density and power efficiency. The torque is improved by 100.3% from the FSPM while the PM volume does not increase too much. The unique of this best structure is that it not only combines the vernier machine and FSPM machine together, but also reduces the torque ripple. The performance of the motor is verified by the simulation using finite-element analysis (FEA).

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“…According to [26], [27], to simplify the analysis, let t = 0. The corresponding MMF is shown in Fig.…”

Section: Operating Principlementioning

confidence: 99%

Comparative Analysis of Different Permanent Magnet Arrangements in a Novel Flux Modulated Electric Machine

Huang

Niu

et al. 2021

IEEE Access

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“…C ompared with conventional permanent magnet synchronous machine (PMSM) and reluctance machine for the application of industrial fields [1][2][3], hybrid excitation synchronous machine (HESM) is one promising candidate due to the feature of wide range speed regulation operation by adjusting the excitation current and d-axis current, especially for wind power generation, electric vehicles (EVs), hybrid EVs and other direct drive systems [4][5][6][7]. In recent years, several different potential solutions of HESMs exhibiting the field modulation topology [8][9][10][11][12], namely, hybrid excitation field modulation machine (HEFMM), has been become the key research subject since it incorporates the merits of HESM and unique magnetic field modulation principle.…”

Section: Introductionmentioning

confidence: 99%

Flux Weakening Control and Experimental Verification of Hybrid Excitation Field Modulation Synchronous Machine for Direct Drive Propulsion

Luo,

Zhang,

et al. 2024

PIER C

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With combining the advantages of the hybrid excited machine and field modulation machine, hybrid excitation field modulation machine (HEFMM) exhibits obvious merits of controllable flux operation and independent flux distribution paths, which is one promising candidate for direct drive application fields. As one newly branch of hybrid excitation synchronous machine (HESM), HEFMM control method can be executed based on the characteristics of the machine operating in different speed regions. When it operates in the low-speed constant power region, the minimum copper loss method is used to optimize the d-axis, q-axis, and excitation current values. When it operates in the high-speed constant power characteristic region, flux weakening fuzzy control strategy combined with particle swarm optimization algorithm for HEFMM was presented. The correctness and effectiveness of the proposed flux weakening fuzzy control strategy were verified by the simulation data and experimental results, which demonstrated that the this current optimization method based on PSO algorithm can effectively reduce the total copper loss of the machine by 22.8%, the range of speed regulation with higher efficiency are obtained.

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“…According to the above literature review, the research on DPME machines mainly focuses on new topologies [6-7, 16-17, 19-20, 22-26], design and optimization [8, 14-15, 18, 21, 27], performance comparison [9,28,[30][31] and control [25,29].…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of Back-EMF of a Dual-Permanent-Magnet-Excited Machine: Alert to Flux Density Harmonics Which Make a Negative Contribution to Back-EMF

Shi

Zhong

Jian³

2021

IEEE Access

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Recently, the dual-permanent-magnet-excited (DPME) machine has attracted growing attention due to its high torque density. Due to the bidirectional field modulated effect (BFME), airgap flux density harmonics (AFDHs) are more complex and abundant than traditional permanent magnet synchronous machines (PMSMs). Moreover, the back-electromotive force (EMF) generated by AFDHs is also complex. Unfortunately, only a few papers qualitatively analyze back-EMF. The qualitative analysis for back-EMF can reveal some important conclusions; for example, only AFDHs meeting specific pole pair numbers (PPNs) can generate back-EMF. However, it may also ignore some details and valuable findings. In this paper, a purely analytical magnetomotive force (MMF) permeance model (PAMPM) for a DPME machine is built to quantitatively analyze the back-EMF. The PAMPM does not require a numerical method, such as conformal transformation. With the PAMPM, AFDHs that contribute to the generation of back-EMF can be recognized and quantified. Interestingly, AFDHs with m2p2=np3 cause PM flux-linkage to have a dc bias, and not all AFDHs play a positive role in the generation of back-EMF. The main recognition results are as follows: 1) the S-II and R-II types of AFDHs in a 12/10 DPME machine overall make a negative contribution to the generation of back-EMF; and 2) AFDHs with PPN=22 in the two types mainly cause a negative contribution. To further verify the above results, 2D finite element simulation and experimental tests of a prototype machine are also conducted.

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Comparative Study of Relieving-DC-Saturation Hybrid Excited Vernier Machine With Different Rotor Pole Designs for Wind Power Generation

Cited by 7 publications

References 18 publications

Comparative Analysis of Different Permanent Magnet Arrangements in a Novel Flux Modulated Electric Machine

Comparative Analysis of Different Permanent Magnet Arrangements in a Novel Flux Modulated Electric Machine

Flux Weakening Control and Experimental Verification of Hybrid Excitation Field Modulation Synchronous Machine for Direct Drive Propulsion

Quantitative Analysis of Back-EMF of a Dual-Permanent-Magnet-Excited Machine: Alert to Flux Density Harmonics Which Make a Negative Contribution to Back-EMF

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