A Novel Linear Stator-PM Vernier Machine With Spoke-Type Magnets

Saberi, Alireza; Faiz, Jawad

doi:10.1109/tmag.2018.2838762

Cited by 25 publications

(11 citation statements)

References 10 publications

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“…The phasor diagram has been depicted in Figure 17 by neglecting stator resistance. Because of the insignificant internal resistance, the voltage drop can be neglected for simple computation [13].…”

Section: Full-load Performance Analysismentioning

confidence: 99%

“…Zhao et al [11] and shi et al [12] improved thrust force, flux density and back EMF in the presented machines by dividing the magnet into smaller magnets in different magnetic directions and converting the magnet with a simple array to Halbach array. Nematsaberi et al [13], by using the spoke array permanent magnet instead of a simple permanent magnet and adding non-magnetic material decreased the leakage flux remarkably which raised the thrust force and PF. Arish et al [14] have improved the performance of the proposed machine by reducing leakage flux and increasing generation of the magnetic field by hybrid structure and the simultaneous use of two different permanent magnet structures, skew and Halbach [15].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Linear Permanent Magnet Vernier Machine Topologies for Wave Energy Converters

Arish

Marignetti

2021

IJE

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Today, the importance of using vernier machines in wave energy converters has increased because of its simple structure and ability to generate a lot of thrust force at low speeds due to the magnetic gear effect. The linear vernier permanent magnet machine has been designed in various structures. Proper design and selection of the main parameters of the machine will improve performance and increase the efficiency of the linear vernier machine. One of these parameters is the shape of the permanent magnets and how they are magnetically oriented. The novelty of this paper is the reduction of leakage flux, achieved by changing the shape and orientation of the permanent magnet. Three types of linear permanent magnet vernier machines with different permanent magnet structures and orientation, including V-shape, Halbach array and consequent-pole are presented. The considered machines have been compared to each other and to the existing machine in terms of airgap flux density, back EMF, PM flux, Inductance, thrust force, detent force, loss, efficiency, power factor, flux density and flux line, using the finite element method in the same conditions and with the same volume of permanent magnets. The results show that the magnetic orientation and shape of the permanent magnet have a considerable effect on the leakage flux, and all the proposed models have a lower leakage flux and better performance compared to the existing model.

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Section: Full-load Performance Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of Linear Permanent Magnet Vernier Machine Topologies for Wave Energy Converters

Arish

Marignetti

2021

IJE

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“…TF-PMLG decouples electric load and magnetic load, the power density of the generator can be increased by increasing the pole pairs. Therefore, TF-PMLG has been a strong contender in some low-speed direct-drive applications, such as DD-WEC [11,12]. However, complex 3-D flux path and translator mounted PMs lead to problems in linear applications.…”

Section: Introductionmentioning

confidence: 99%

“…The total volume of PMs will increase as the translator length increases. Therefore, translator-PM configuration cannot be appropriate solutions for some long-stroke applications such as maglevs or high power wave energy converters as they are not economical compared with stator-PM counterparts [12]. In this paper, from the perspective of the magnetic circuit, a stator-PM TF-PMLG topology is proposed, the armature winding and PMs are located in outer stator and inner stator respectively and the translator is made of steel blocks and non-magnetic blocks.…”

Section: Introductionmentioning

confidence: 99%

A Stator-PM Transverse Flux Permanent Magnet Linear Generator for Direct Drive Wave Energy Converter

et al. 2021

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Transverse flux permanent magnet linear generator (TF-PMLG) is widely used in direct drive wave energy converter (DD-WEC) because of its high power density. Traditional transverse flux machine (TFM) is designed and built in form of translator-PM. But translator-PM configuration needs a large amount of PM and the cost is high in long stroke application, like DD-WEC. Recently, the stator-PM linear machines have gained more attention for reducing the PM volume and improving the generator performances under low-speed conditions. In this paper, a novel stator-PM TF-PMLG for DD-WEC has been proposed. The fundamental configuration and operation principle of the generator are illustrated. Then, the expressions of the back EMF and the electromagnetic thrust are derived by magnetic circuit analysis. Main dimension parameters, such as PM thickness, central angle of the outer stator shoe and pole pitch are determined and optimized based on finite element analysis (FEA). This topology has advantages of low PM consumption and high power density, and is a suitable candidate for long stroke applications, like DD-WEC, in which a high power per PM volume is usually needed to reduce the amount of permanent magnet and ensure high power density.

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“…Zhao et al [27] by dividing the PM into the very small segment as Halbach array in various magnetic orientation back EMF, thrust force and flux density raised. Nematsaberi and Faiz [28] by changing the simple array to the spoke array PM and applying non-magnetic material the thrust force and PF have increased. The target of this paper is proposing a new LDSFRPMM with toroidal winding and a special arrangement of PM to improve the weaknesses of conventional LDSFRPMM.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a New Linear Dual Stator Consequent Pole Halbach Array Flux Reversal Machine

2021

IJE

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The permanent magnet machine has attracted much attention due to its high torque density at low speed and simple configuration. This feature is due to many magnetic pole pairs that flux in the air gap can be significantly changed with the smallest motion of the moving. In this paper, a linear dual stator flux reversal permanent magnet machine (LDSFRPMM) with toroidal winding is presented, which magnets embedded with Halbach and simple array on the translator and stator, respectively. The innovation of this structure over a conventional machine is the addition of a magnet between the stator teeth with the appropriate magnetic orientation,and finding the best width of permanent magnet on the stator and a change of the type of winding from the concentrated to the toroidal. By implementing these changes on a conventional machine, the main parameters of the machine such as back electromotive force (EMF), thrust force, power factor and permanent magnetic (PM) flux are increased which improves the performance of the proposed machine.

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A Novel Linear Stator-PM Vernier Machine With Spoke-Type Magnets

Cited by 25 publications

References 10 publications

Evaluation of Linear Permanent Magnet Vernier Machine Topologies for Wave Energy Converters

Evaluation of Linear Permanent Magnet Vernier Machine Topologies for Wave Energy Converters

A Stator-PM Transverse Flux Permanent Magnet Linear Generator for Direct Drive Wave Energy Converter

Analysis of a New Linear Dual Stator Consequent Pole Halbach Array Flux Reversal Machine

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