Optimization of the flux modulation poles for Vernier machines with concentrated windings

Thyroff, Dominik; Hahn, Ingo

doi:10.1109/wemdcd.2017.7947733

Cited by 7 publications

(4 citation statements)

References 11 publications

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“…However, by referring to Figure 7A and using a nonmagnetic yoke, its torque capacity and power factor are reduced. 32,33 24,25 F I G U R E 7 Vernier machine PM on rotor and stator 31 directions, one radially and two tangentially. 33,34 This improves the flux density and increases the torque development capability.…”

Section: Pm Rotor Arrangementsmentioning

confidence: 99%

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Single stator‐single rotor permanent magnet Vernier machine topologies for direct‐drive applications: Review and case study

Faiz

Ghods

Arianborna

et al. 2021

Int Trans Electr Energ Syst

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Stator and rotor structures, arrangement of permanent magnets (PMs), and type of coils of PM Vernier machines are reviewed and classified. Then, electromagnetic performance and the energy conversion process in the machine are described. Determination of magnetic field distribution and air-gap permeance of the machine is very complicated than that of other PM machines. Impacts of variations of dimensions in the machine such as the number of modulators on the modulus width and the rotor PMs thickness on the load characteristics (cogging torque, back-EMF, and power factor) are investigated. In addition, principles of flux modulation machines operation are presented and the shape and dimensions of the modulators are optimized. The two-phase and four-phase winding types are used to improve the output power of the machine. Finally, a 150 W PM Vernier generator is designed and prototyped to feed the road speed camera.electric machines and drives, power quality | INTRODUCTIONDirect-drive systems are widely used in various applications, such as wind generators and electric vehicle (EV) propulsion. 1,2 To regulate speed in low-speed applications, different structures of direct-driven machines have been so far proposed in which the gearbox is removed from the machine, which is considered as the main advantage. [3][4][5] In recent years, many types of direct-driven machines have been introduced, such as transverse flux permanent magnets (PM), flux switching, and flux reversal machines whose performances are based on the properties of flux

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Section: Pm Rotor Arrangementsmentioning

confidence: 99%

“…However, if the PMs are in the opposite direction to magnetize, the induced voltage and the cogging torque increase. 32…”

Section: Pm Rotor Arrangementsmentioning

confidence: 99%

Single stator‐single rotor permanent magnet Vernier machine topologies for direct‐drive applications: Review and case study

Faiz

Ghods

Arianborna

et al. 2021

Int Trans Electr Energ Syst

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“…• novel FMP shapes: S-shape, concave-shape FMP [44,45] • non-uniform FMP: adjustable pitch ratio [46], (Fig. 9) • impact of FMP design on radial force: noise & vibration analyses [47,48] • SPM: radially-magnetised [49] or Halbach [ of concentrated-winding PMVM with different slot/pole combinations [45].…”

Section: Flux Modulation Poles (Fmps)mentioning

confidence: 99%

“…It appears that PMVMs with concentrated windings suffers more from low‐power factor (high‐leakage inductance). An S‐shaped side line of FMP is proposed based on a multi‐objective genetic‐algorithm‐based optimisation [44]. Torque density and power factor are the two optimisation objectives.…”

Section: Winding Flux Modulation Pole and Rotor Designmentioning

confidence: 99%

Permanent magnet vernier machine: a review

El-Refaie

2019

IET Electric Power Applications

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Permanent magnet vernier machines (PMVMs) gained a lot of interest over the past couple of decades. This is mainly due to their high torque density enabled by the magnetic gearing effect. This study will provide a thorough review of recent advances in PMVMs. This review will cover the principle of operation and nature of magnetic gearing in PMVMs, and a better understanding of novel PMVM topologies using different winding configuration as well as different modulation poles and rotor structures. Detailed discussions on the choice of gear ratio, slot-pole combinations, design optimisation and role of advanced materials in PMVMs will be presented. This will provide an update on the current state-of-the art as well as future areas of research. Furthermore, the power factor issue, fault tolerance as well as cost reduction will be discussed highlighting the gap between the current state-of-the art and what is needed in practical applications.

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