Axial flux plastic multi-disc brushless PM motors: performance assessment

Profumo, F.; Tenconi, Alberto; Cerchio, M.; Eastham, J.F.; Coles, P.C.

doi:10.1109/apec.2004.1295962

Cited by 21 publications

(12 citation statements)

References 9 publications

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“…NGM is the reference design and discussed in more detail in preceding sections. The main data for these machines is summarized in Table VIII and further details are available in [17], [19], [28], [29].…”

Section: Discussion and Experimental Validationmentioning

confidence: 99%

Coreless and Conventional Axial Flux Permanent Magnet Motors for Solar Cars

Taran

Rallabandi

Heins³

et al. 2018

IEEE Trans. on Ind. Applicat.

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Axial flux permanent magnet (AFPM) motors are suitable options for solar powered vehicles due to their compact structure and high torque density. Furthermore, certain types of APFM machines may be configured without stator cores, which eliminates associated losses and cogging torque and simplifies the manufacturing and assembly. This paper examines two machine designs for use in the solar powered vehicle of the challenger class-a single rotor, single stator conventional AFPM machine, and a coreless AFPM machine with multiple stator and rotor disks. Response surface methodology (RSM) is utilized for the systematic comparison of the conventional and coreless topologies and to select the optimum designs among several hundreds of candidates. Designs with minimum losses and mass producing required torque with larger air-gap are favored. The performance of the selected designs have been studied via 3D finite element analysis (FEA). The FEA parametric modeling methodology is validated by measurements on three AFPM machines of the conventional and coreless type. Index Terms-Axial flux permanent magnet machines, coreless, multi-disk, solar powered electric vehicles, finite element analysis, winding factor, response surface methodology, design of experiments.

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Section: Discussion and Experimental Validationmentioning

confidence: 99%

Coreless and Conventional Axial Flux Permanent Magnet Motors for Solar Cars

Taran

Rallabandi

Heins³

et al. 2018

IEEE Trans. on Ind. Applicat.

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“…The stator construction is coreless and comprises only the conductive coils and a light supporting disc structure. The machine was originated from a study for stratospheric unmanned aircraft propulsion [5], [6], [7]. Multiple stator and rotor discs were employed to obtain high power density.…”

Section: Technology Reviewmentioning

confidence: 99%

“…This paper studies the replacement of conventional copper coils with CNT coils in a multi-disc Axial Flux Permanent Magnet (AFPM) motor. This motor is inspired by a machine originally proposed for stratospheric unmanned aircraft propulsion [5], [6], [7]. The next section is devoted to reviewing the development of CNT wires and their usage in electrical machine winding.…”

Section: Introductionmentioning

confidence: 99%

On the feasibility of carbon nanotube windings for electrical machines — Case study for a coreless axial flux motor

Rallabandi

Taran

Ionel

et al. 2016

2016 IEEE Energy Conversion Congress and Exposition (ECCE)

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The latest developments in carbon nanotube (CNT) wires and yarns attract great interest for potential application to electromagnetic devices, such as electrical machines and transformers. The CNT material properties are largely different from copper and aluminum in terms of electrical conductivity, mass density, and thermal transfer, creating a new design paradigm for which the traditional rules and device topologies no longer apply. This paper proposes a brushless permanent magnet multidisc axial flux construction with coreless stator and special windings and minimal rotor back iron, as a suitable topology for CNT winding application. Specific analytical closed-form sizing equations, as a function of winding electric conductivity, machine dimensions, and operating speed/frequency, are derived and employed in a systematic comparative study over a range of kW power ratings and speeds between 1,000 and 10,000 rpm. The numerical study is complemented by 3D and 2D electromagnetic FEA. The results show that the designs with CNT windings may have substantially higher specific power per mass, particularly at high rotational speeds and/or supply frequency, where the combined effect of DC and AC conduction losses in the windings is significant. Index Terms-axial flux machine, coreless motor, sizing equations, carbon nanotube conductors, CNT wire, CNT yarn.

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“…Heliplat selected BLDC with axial flux disc structure. Instead of traditional coreless supporting structure, advanced composite plastic material is used to further reduce mass [6], [7]. In addition to solar-powered aircraft, light aircraft or gliders also adopted permanent magnet motors in propulsion system [8]- [10].…”

Section: Introductionmentioning

confidence: 99%

Mass Optimization Method of a Surface-Mounted Permanent Magnet Synchronous Motor Based on a Lightweight Structure

Zhang

2020

IEEE Access

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To solve the problem that the propulsion motor of the solar-powered aircraft is difficult to meet the high-torque-density requirement, the mass optimization method of a surface-mounted permanent magnet synchronous motor (SPMSM) based on a lightweight structure is proposed in this paper. According to the motor load generated by propeller, the strength and stiffness analytical models of the mechanical structure are established. By correlating the mechanical dimensions with the electromagnetic dimensions, a full-scale parametric model of SPMSM is obtained. A 4kW and a 167W SPMSMs are designed based on the parametric model. Analysis results show that with the increase of the ratio of motor diameter to length, the motor mass firstly decreases and then increases, and there is a minimum value. The validity of the lightweight structure and analytical models are verified by the finite element models (FEM) and prototypes.

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Axial flux plastic multi-disc brushless PM motors: performance assessment

Cited by 21 publications

References 9 publications

Coreless and Conventional Axial Flux Permanent Magnet Motors for Solar Cars

Coreless and Conventional Axial Flux Permanent Magnet Motors for Solar Cars

On the feasibility of carbon nanotube windings for electrical machines — Case study for a coreless axial flux motor

Mass Optimization Method of a Surface-Mounted Permanent Magnet Synchronous Motor Based on a Lightweight Structure

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