Power Density Evaluation of a Novel Double-Stator Magnetic Geared Permanent Magnet Generator

Salihu, Shehu Mustafa; Misron, Norhisam; Othman, Mohammad Lutfi; Hanamoto, Tsuyoshi

doi:10.2528/pierb17102303

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…The split ratio, 𝑆 𝑟 , is given as the ratio of the rotor active airgap length to the length of outer stator radius, and it is expressed in (1). Similarly, the electrical frequency, 𝑓 𝑟 , of the developed machine is given in (2).…”

Section: Effect Of Model Geometric Variablesmentioning

confidence: 99%

“…Many different topologies of the double-stator permanent magnet (DSPM) machine are being investigated lately, due its advantages over the single stator permanent magnet machines of similar size. It is proved that DSPM machines have superior electromagnetic performance than their single-stator equivalents, as justified in [1] and [2]; though, these virtues are usually at a higher cost consequence with increased machine structural complexity. Therefore, a new type of a high-performance double-stator permanent magnet machine having alternating current (AC) windings on both the inner and outer stators is proposed and compared in this present study, in order to obtain an improved overall machine performance.…”

Section: Introductionmentioning

confidence: 99%

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Archives of Electrical Engineering

Awah

2022

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A new double stator permanent magnet machine having two sets of alternating current (AC) windings in separate stators is proposed in this study. The proposed machine is appropriate for low-speed direct-drive applications. 2D-and 3D-finite element analysis (FEA) is adopted in the result predictions. The considered machine elements are: coil and phase flux linkage, coil and phase induced-electromotive force (EMF), copper loss, current density and torque characteristics. The analysis shows that the studied permanent magnet (PM) machine has better electromagnetic performance than its single-stator equivalent. Moreover, the proposed machine has potential for higher reliability if the separate stators are used independently. The effect of design parameters on open-circuit flux linkage and induced-electromotive force, as well as on the average electromagnetic torque of the proposed double stator machine is also presented. It is observed that for each of the investigated design variables, there is a need to select the optimal value in order to achieve the best average torque. The investigated design parameters are: the split ratio, magnet thickness, rotor radial thickness, inner stator tooth-width, rotor inner and outer iron-width/pitch ratio, and stator yoke size.

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Section: Effect Of Model Geometric Variablesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Archives of Electrical Engineering

Awah

2022

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“…The single stator system is the simplest one which is used in conventional generators. The dual stator system provides high power generation in comparison to a single stator [29]. There are total two air gaps in this dual stator system, which results in the addition of the Magnetomotive Force (MMF) created by the inner and outer sets of magnets in the rotor.…”

Section: Figure 1 Model Of Wind-power Systemmentioning

confidence: 99%

Design and Characteristics Investigation of Novel Dual Stator Pseudo-Pole Five-Phase Permanent Magnet Synchronous Generator for Wind Power Application

et al. 2020

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The main focus of this paper is to design and characteristics investigation of Novel Dual Stator Pseudo-Pole Five Phase Permanent Magnet Synchronous Generator (NDSPPFP-PMSG) for wind power application. The proposed generator has a dual stator and two sets of five phase windings which enhance its power density and fault tolerant capability. The novelty of this generator is based on the fact that eight magnetic poles are formed using only four poles of actual magnets on both the surfaces of the rotor. For the designing and optimal electromagnetic performance of the proposed generator, a Dynamic Magnetic Circuit Model (DMCM) is reported. To validate the results obtained from DMCM, Finite Element Method (FEM) has been opted owing to its high accuracy. For showing the performance superiority, the proposed generator is compared with two conventional generators namely, Dual Stator Embedded-Pole Five Phase (DSEPFP) and Single Stator Single Rotor Five Phase (SSSRFP) PMSG. To compare their performances, FEM results are considered. The electromagnetic performance namely, generated Electromotive Force(EMF), percentage(%) Total Harmonic Distortion(THD) of generated EMF, generated EMF vs speed, terminal voltage vs load current, electromagnetic torque developed on rotor vs time, %ripple content in the torque, and %efficiency vs load current are investigated for all the three generators. From these investigations, it is found that the power density (power to weight ratio) of the proposed generator is maximum.

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“…Besides using the MG for speed conversion of a motor, some researchers developed a new structure of MG with dual-iron ring which is integrated with a generator. The integration between the MG and generator produced higher power density for low-speed applications, such as wind turbine [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Simplified Design of Magnetic Gear by Considering the Maximum Transmission Torque Line

et al. 2020

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Magnetic gears (MGs) technology is studied widely among research institutions, with several improvements being documented. This development attracts a high amount of attention due to the demand in the development of magnetic gears towards higher performance than the conventional mechanical counterpart. In general, the design is complicated and there is a lack in detailed references for designing an MG for specific transmission torque as required by its application. Trial-and-error approaches have been the norm in achieving the desired torque by referring the existing MGs for the desired value of torque. This paper presents a new simplified approach towards designing an MG for the required torque and size by referring through a Maximum Transmission Torque Line (MTTL) reference. Finite element method (FEM) is used in analyzing randomly designed magnetic gears with various parameters towards the desired values of the MTTL. The proposed approach of MTTL is a new approach to estimate the total volume of permanent magnets (PMs) required for the MG to achieve the desired transmission torque. The reference line is used to generate equation relating the specific parameters of MG to develop the simplified design of MG based on the estimated total volume of PMs. This simplified way details to 8.5% of error in targeting the desired transmission torque, a means and way for the first stage of the MG design approach to reduce the conventional approaches.

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Power Density Evaluation of a Novel Double-Stator Magnetic Geared Permanent Magnet Generator

Cited by 5 publications

References 17 publications

Archives of Electrical Engineering

Archives of Electrical Engineering

Design and Characteristics Investigation of Novel Dual Stator Pseudo-Pole Five-Phase Permanent Magnet Synchronous Generator for Wind Power Application

Simplified Design of Magnetic Gear by Considering the Maximum Transmission Torque Line

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